Document ID: EPA-HQ-OW-2018-0149-11694
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2020-04-21T04:00Z

[Federal Register Volume 84, Number 204 (Tuesday, October 22, 2019)]
[Rules and Regulations]
[Pages 56626-56671]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2019-20550]

[[Page 56625]]

Vol. 84

Tuesday,

No. 204

October 22, 2019

Part IV

Department of Defense

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Department of the Army, Corps of Engineers

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33 CFR Part 328

Environmental Protection Agency

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40 CFR Parts 110, 112, 116, et al.

Definition of ``Waters of the United States''--Recodification of Pre-
Existing Rules; Final Rule

  Federal Register / Vol. 84 , No. 204 / Tuesday, October 22, 2019 / 
Rules and Regulations  

[[Page 56626]]

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DEPARTMENT OF DEFENSE

Department of the Army, Corps of Engineers

33 CFR Part 328

ENVIRONMENTAL PROTECTION AGENCY

40 CFR Parts 110, 112, 116, 117, 122, 230, 232, 300, 302, and 401

[EPA-HQ-OW-2017-0203; FRL-10000-10-OW]
RIN 2040-AF74

Definition of ``Waters of the United States''--Recodification of 
Pre-Existing Rules

AGENCY: Department of Defense, Department of the Army, Corps of 
Engineers; Environmental Protection Agency (EPA).

ACTION: Final rule.

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SUMMARY: The Environmental Protection Agency (EPA) and the Department 
of the Army (``the agencies'') are publishing a final rule to repeal 
the 2015 Clean Water Rule: Definition of ``Waters of the United 
States'' (``2015 Rule''), which amended portions of the Code of Federal 
Regulations (CFR), and to restore the regulatory text that existed 
prior to the 2015 Rule. The agencies will implement the pre-2015 Rule 
regulations informed by applicable agency guidance documents and 
consistent with Supreme Court decisions and longstanding agency 
practice.
    The agencies are repealing the 2015 Rule for four primary reasons. 
First, the agencies conclude that the 2015 Rule did not implement the 
legal limits on the scope of the agencies' authority under the Clean 
Water Act (CWA) as intended by Congress and reflected in Supreme Court 
cases, including Justice Kennedy's articulation of the significant 
nexus test in Rapanos. Second, the agencies conclude that in 
promulgating the 2015 Rule the agencies failed to adequately consider 
and accord due weight to the policy of the Congress in CWA section 
101(b) to ``recognize, preserve, and protect the primary 
responsibilities and rights of States to prevent, reduce, and eliminate 
pollution'' and ``to plan the development and use . . . of land and 
water resources.'' 33 U.S.C. 1251(b). Third, the agencies repeal the 
2015 Rule to avoid interpretations of the CWA that push the envelope of 
their constitutional and statutory authority absent a clear statement 
from Congress authorizing the encroachment of federal jurisdiction over 
traditional State land-use planning authority. Lastly, the agencies 
conclude that the 2015 Rule's distance-based limitations suffered from 
certain procedural errors and a lack of adequate record support. The 
agencies find that these reasons, collectively and individually, 
warrant repealing the 2015 Rule.
    With this final rule, the regulations defining the scope of federal 
CWA jurisdiction will be those portions of the CFR as they existed 
before the amendments promulgated in the 2015 Rule.

DATES: This rule is effective on December 23, 2019.

ADDRESSES: The EPA has established a docket for this action under 
Docket ID No. EPA-HQ-OW-2017-0203. All documents in the docket are 
listed on the http://www.regulations.gov website. Although listed in 
the index, some information is not publicly available, e.g., CBI or 
other information whose disclosure is restricted by statute. Certain 
other material, such as copyrighted material, is not placed on the 
internet and will be publicly available only in hard copy form. 
Publicly available docket materials are available electronically 
through http://www.regulations.gov.

FOR FURTHER INFORMATION CONTACT: Michael McDavit, Office of Water 
(4504-T), Environmental Protection Agency, 1200 Pennsylvania Avenue NW, 
Washington, DC 20460; telephone number: (202) 566-2428; email address: 
CWAwotus@epa.gov; or Jennifer Moyer, Regulatory Community of Practice 
(CECW-CO-R), U.S. Army Corps of Engineers, 441 G Street NW, Washington, 
DC 20314; telephone number: (202) 761-6903; email address: 
USACE_CWA_Rule@usace.army.mil.

SUPPLEMENTARY INFORMATION: The agencies are taking this final action to 
repeal the Clean Water Rule: Definition of ``Waters of the United 
States,'' 80 FR 37054 (June 29, 2015), and to recodify the regulatory 
definitions of ``waters of the United States'' that existed prior to 
the August 28, 2015 effective date of the 2015 Rule. Those pre-existing 
regulatory definitions are the ones that the agencies are currently 
implementing in more than half the States in light of various judicial 
decisions currently enjoining the 2015 Rule. As of the effective date 
of this final rule, the agencies will administer the regulations 
promulgated in 1986 and 1988 in portions of 33 CFR part 328 and 40 CFR 
parts 110, 112, 116, 117, 122, 230, 232, 300, 302, and 401,\1\ and will 
continue to interpret the statutory term ``waters of the United 
States'' to mean the waters covered by those regulations consistent 
with Supreme Court decisions and longstanding practice, as informed by 
applicable agency guidance documents, training, and experience.
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    \1\ While the EPA administers most provisions in the CWA, the 
Department of the Army, Corps of Engineers administers the 
permitting program under section 404. During the 1980s, both 
agencies adopted substantially similar definitions of ``waters of 
the United States.'' See 51 FR 41206 (Nov. 13, 1986) (amending 33 
CFR 328.3); 53 FR 20764 (June 6, 1988) (amending 40 CFR 232.2).
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    State, tribal, and local governments have well-defined and 
established relationships with the Federal government in implementing 
CWA programs. This final rule returns the relationship between the 
Federal government, States, and Tribes to the longstanding and familiar 
distribution of power and responsibilities that existed under the CWA 
for many years prior to the 2015 Rule.
    In issuing the July 27, 2017 notice of proposed rulemaking (NPRM) 
and the July 12, 2018 supplemental notice of proposed rulemaking 
(SNPRM), the agencies gave interested parties an opportunity to comment 
on important considerations and reasons for the agencies' proposal, 
including whether it is desirable and appropriate to recodify the pre-
2015 regulations as an interim step pending a substantive rulemaking to 
reconsider the definition of ``waters of the United States.'' See 82 FR 
34899, 34903 (July 27, 2017); 83 FR 32227 (July 12, 2018). The agencies 
received approximately 770,000 public comments on this rulemaking and 
carefully reviewed those comments in deciding whether to finalize this 
rule.
    For the reasons discussed in Section III of this notice, the 
agencies conclude that the 2015 Rule exceeded the agencies' authority 
under the CWA by adopting an interpretation of Justice Kennedy's 
``significant nexus'' standard articulated in Rapanos v. United States 
and Carabell v. United States, 547 U.S. 715 (2006) (``Rapanos'') that 
was inconsistent with important aspects of that opinion (as well as the 
opinion of the Court in Solid Waste Agency of Northern Cook County v. 
U.S. Army Corps of Engineers, 531 U.S. 159 (2001) (``SWANCC'')) and 
which enabled federal regulation of waters outside the scope of the 
Act, even though Justice Kennedy's concurring opinion was identified as 
the basis for the significant nexus standard established in the 2015 
Rule. The agencies also conclude that, contrary to reasons articulated 
in support of the 2015 Rule, the rule

[[Page 56627]]

expanded the meaning of ``tributaries'' and ``adjacent'' wetlands to 
include waters beyond those regulated by the agencies under the pre-
existing regulations, including certain isolated waters, as applied by 
the agencies following decisions of the Supreme Court in Rapanos and 
SWANCC. One of the agencies' stated goals in the 2015 Rule was to 
provide greater clarity in identifying the geographic scope of the CWA, 
believing that ``State, tribal, and local governments have well-defined 
and longstanding relationships with the Federal government in 
implementing CWA programs and these relationships are not altered by 
the final rule.'' 80 FR 37054. The agencies now believe that the 2015 
Rule improperly altered the balance of authorities between the Federal 
and State governments, in contravention of CWA section 101(b), 33 
U.S.C. 1251(b), and pushed the envelope of the agencies' constitutional 
and statutory authority, despite the absence of a clear indication that 
Congress intended to invoke the outer limits of its power. The agencies 
also conclude that the 2015 Rule's distance-based limitations in the 
(a)(6) and (a)(8) categories of waters were procedurally deficient and 
lacked adequate record support.
    Additionally, since the agencies' publication of the SNPRM, the 
U.S. District Courts for the Southern District of Texas and the 
Southern District of Georgia have found that the rule suffered from 
certain procedural (both courts) and substantive (Southern District of 
Georgia) errors and issued orders remanding the 2015 Rule back to the 
agencies. Texas v. EPA, No. 3:15-cv-162, 2019 WL 2272464 (S.D. Tex. May 
28, 2019); Georgia v. Wheeler, No. 2:15-cv-079, 2019 WL 3949922 (S.D. 
Ga. Aug. 21, 2019). As reflected below, a number of the agencies' 
conclusions regarding the validity of the 2015 Rule are consistent with 
and reinforced by the findings of these courts.
    Further, for the reasons discussed in Section IV of this notice, 
the agencies conclude that regulatory certainty will be best served by 
repealing the 2015 Rule and recodifying the pre-2015 regulations 
currently in effect in those States where the 2015 Rule is enjoined. 
Though the agencies recognize that the pre-existing regulations pose 
certain implementation challenges, the agencies find that restoring the 
prior regulations is preferable to maintaining the 2015 Rule, including 
because returning to the pre-2015 regulations will reinstate nationwide 
a longstanding regulatory framework that is more familiar to and 
better-understood by the agencies, States, Tribes, local governments, 
regulated entities, and the public while the agencies consider public 
comments on the proposed revised definition of ``waters of the United 
States.'' See 84 FR 4154 (Feb. 14, 2019). In that separate rulemaking, 
as referenced in Section VII, the agencies are reconsidering the proper 
scope of federal CWA jurisdiction and seek to establish a clear and 
implementable regulatory definition that better effectuates the 
language, structure, and purposes of the CWA.

Table of Contents

I. General Information
    A. Where can I find information related to this rulemaking?
    B. What action are the agencies taking?
    C. What is the agencies' authority for taking this action?
II. Background
    A. The 2015 Rule
    B. Legal Challenges to the 2015 Rule
    C. Executive Order 13778 and the ``Step One'' Notice of Proposed 
Rulemaking and the Supplemental Notice of Proposed Rulemaking
    D. The Applicability Date Rule
III. Basis for Repealing the 2015 Rule
    A. Legal Authority To Repeal
    B. Legal Background
    1. The Clean Water Act
    2. U.S. Supreme Court Precedent
    3. Principles and Considerations
    C. Reasons for Repeal
IV. Basis for Restoring the Pre-Existing Regulations
V. Alternatives to the Final Rule
VI. Economic Analysis
VII. The Effect of this Rule and the Agencies' Next Steps
VIII. Statutory and Executive Order Reviews

I. General Information

A. Where can I find information related to this rulemaking?

    1. Docket. An official public docket for this action has been 
established under Docket ID No. EPA-HQ-OW-2017-0203. The official 
public docket consists of the documents specifically referenced in this 
action, and other information related to this action. The official 
public docket is the collection of materials that is available for 
public viewing at the OW Docket, EPA West, Room 3334, 1301 Constitution 
Ave. NW, Washington, DC 20004. This Docket Facility is open from 8:30 
a.m. to 4:30 p.m., Monday through Friday, excluding legal holidays. The 
OW Docket telephone number is (202) 566-2426. A reasonable fee will be 
charged for copies.
    2. Electronic Access. You may access this Federal Register document 
electronically under the ``Federal Register'' listings at http://www.regulations.gov. An electronic version of the public docket is 
available through EPA's electronic public docket and comment system, 
EPA Dockets. You may access EPA Dockets at http://www.regulations.gov 
to view public comments as they are submitted and posted, access the 
index listing of the contents of the official public docket, and access 
those documents in the public docket that are available electronically. 
For additional information about EPA's public docket, visit the EPA 
Docket Center homepage at http://www.epa.gov/epahome/dockets.htm. 
Although not all docket materials may be available electronically, you 
may still access any of the publicly available docket materials through 
the Docket Facility.

B. What action are the agencies taking?

    In this notice, the agencies are publishing a final rule repealing 
the 2015 amendments to the definition of ``waters of the United 
States'' in portions of 33 CFR part 328 and 40 CFR parts 110, 112, 116, 
117, 122, 230, 232, 300, 302, and 401, and are restoring the pre-
existing regulatory text.

C. What is the agencies' authority for taking this action?

    The authority for this action is the Federal Water Pollution 
Control Act, 33 U.S.C. 1251 et seq., including sections 301, 304, 311, 
401, 402, 404, and 501.

II. Background

A. The 2015 Rule

    On June 29, 2015, the agencies issued a final rule (80 FR 37054) 
amending various portions of the CFR that set forth a definition of 
``waters of the United States,'' a term contained in the CWA section 
502(7) definition of ``navigable waters,'' 33 U.S.C. 1362(7).
    One of the stated purposes of the 2015 Rule was to ``increase CWA 
program predictability and consistency by clarifying the scope of 
`waters of the United States' protected under the Act.'' 80 FR 37054. 
The 2015 Rule defined the geographic scope of the CWA by placing waters 
into three categories: (A) Waters that are categorically 
``jurisdictional by rule'' in all instances (i.e., without the need for 
any additional analysis); (B) waters that are subject to case-specific 
analysis to determine whether they are jurisdictional; and (C) waters 
that are categorically excluded from jurisdiction. Waters considered 
``jurisdictional by rule'' included (1) waters which are currently 
used, were used in the past, or may be susceptible to use in interstate 
or foreign commerce, including all waters which are subject to the ebb 
and flow of the tide; (2) interstate waters, including interstate 
wetlands; (3) the territorial seas; (4) impoundments of

[[Page 56628]]

waters otherwise identified as jurisdictional; (5) tributaries of the 
first three categories of ``jurisdictional by rule'' waters; and (6) 
waters adjacent to a water identified in the first five categories of 
``jurisdictional by rule'' waters, including ``wetlands, ponds, lakes, 
oxbows, impoundments, and similar waters.'' See 80 FR 37104.
    The 2015 Rule added new definitions of key terms such as 
``tributaries'' and revised previous definitions of terms such as 
``adjacent'' (by adding a new definition of ``neighboring'' that is 
used in the definition of ``adjacent'') that would determine whether 
waters were ``jurisdictional by rule.'' See id. at 37105. Specifically, 
a ``tributary'' under the 2015 Rule is a water that contributes flow, 
either directly or through another water, to a water identified in the 
first three categories of ``jurisdictional by rule'' waters and that is 
characterized by the presence of the ``physical indicators'' of a bed 
and banks and an ordinary high water mark. ``These physical indicators 
demonstrate there is volume, frequency, and duration of flow sufficient 
to create a bed and banks and an ordinary high water mark, and thus to 
qualify as a tributary.'' Id.\2\ Tributaries under the 2015 Rule could 
be natural, man-altered, or man-made, and do not lose their status as a 
tributary if, for any length, there is one or more constructed breaks 
(such as bridges, culverts, pipes, or dams), or one or more natural 
breaks (such as wetlands along the run of a stream, debris piles, 
boulder fields, or a stream that flows underground) so long as a bed 
and banks and an ordinary high water mark could be identified upstream 
of the break. Id. at 37105-06.
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    \2\ The 2015 Rule did not delineate jurisdiction specifically 
based on categories with established scientific meanings such as 
ephemeral, intermittent, and perennial waters that are based on the 
source of the water and nature of the flow. See id. at 37076 
(``Under the rule, flow in the tributary may be perennial, 
intermittent, or ephemeral.''). Under the 2015 Rule, tributaries 
also did not need to possess any specific volume, frequency, or 
duration of flow, or to contribute flow to a traditional navigable 
water in any given year or specific time period.
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    In the 2015 Rule, the agencies did not expressly amend the 
longstanding definition of ``adjacent'' (defined as ``bordering, 
contiguous, or neighboring''), but the agencies added, for the first 
time, a definition of ``neighboring'' that affected the interpretation 
of ``adjacent.'' The 2015 Rule defined ``neighboring'' to encompass all 
waters located within 100 feet of the ordinary high water mark of a 
category (1) through (5) ``jurisdictional by rule'' water; all waters 
located within the 100-year floodplain of a category (1) through (5) 
``jurisdictional by rule'' water and not more than 1,500 feet from the 
ordinary high water mark of such water; all waters located within 1,500 
feet of the high tide line of a category (1) through (3) 
``jurisdictional by rule'' water; and all waters within 1,500 feet of 
the ordinary high water mark of the Great Lakes. Id. at 37105. The 
entire water would be considered ``neighboring'' if any portion of it 
lies within one of these zones. See id. These quantitative measures did 
not appear in the proposed rule and were not sufficiently supported in 
the administrative record for the final rule.
    In addition to the six categories of ``jurisdictional by rule'' 
waters, the 2015 Rule identified certain waters that would be subject 
to a case-specific analysis to determine if they had a ``significant 
nexus'' to a water that is jurisdictional. Id. at 37104-05. The first 
category consists of five specific types of waters in specific regions 
of the country: Prairie potholes, Carolina and Delmarva bays, pocosins, 
western vernal pools in California, and Texas coastal prairie wetlands. 
Id. at 37105. The second category consists of all waters located within 
the 100-year floodplain of any category (1) through (3) 
``jurisdictional by rule'' water and all waters located within 4,000 
feet of the high tide line or ordinary high water mark of any category 
(1) through (5) ``jurisdictional by rule'' water. Id. These 
quantitative measures did not appear in the proposed rule and were not 
sufficiently supported in the administrative record for the final rule.
    The 2015 Rule defined ``significant nexus'' to mean a water, 
including wetlands, that either alone or in combination with other 
similarly situated waters in the region, significantly affected the 
chemical, physical, or biological integrity of a category (1) through 
(3) ``jurisdictional by rule'' water. 80 FR 37106. ``For an effect to 
be significant, it must be more than speculative or insubstantial.'' 
Id. The term ``in the region'' meant ``the watershed that drains to the 
nearest'' primary water.\3\ Id. This definition was different from the 
test articulated by the agencies in their 2008 Rapanos Guidance.\4\ 
That guidance interpreted ``similarly situated'' to include all 
wetlands (not waters) adjacent to the same tributary.
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    \3\ In this notice, a ``primary water'' is a category (1) 
through (3) ``jurisdictional by rule'' water as defined in the 2015 
Rule.
    \4\ See U.S. EPA and U.S. Army Corps of Engineers. Clean Water 
Act Jurisdiction Following the U.S. Supreme Court's Decision in 
Rapanos v. United States & Carabell v. United States at 1 (Dec. 2, 
2008) (``Rapanos Guidance''), available at https://www.epa.gov/sites/production/files/2016-02/documents/cwa_jurisdiction_following_rapanos120208.pdf. The agencies 
acknowledge that the Rapanos Guidance does not impose legally 
binding requirements, see id. at 4 n.17, but believe that this 
guidance is relevant to the discussion in this notice.
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    Under the 2015 Rule, to determine whether a water, alone or in 
combination with similarly situated waters across the watershed of the 
nearest primary water, had a significant nexus, one had to consider 
nine functions such as sediment trapping, runoff storage, provision of 
life cycle dependent aquatic habitat, and other functions. It was 
sufficient for determining whether a water had a significant nexus 
under the 2015 Rule if any single function performed by the water, 
alone or together with similarly situated waters in the region, 
contributed significantly to the chemical, physical, or biological 
integrity of the nearest category (1) through (3) ``jurisdictional by 
rule'' water. Id. Taken together, the enumeration of the nine functions 
and the more expansive consideration of ``similarly situated waters in 
the region'' in the 2015 Rule means that the vast majority of water 
features in the United States may have come within the jurisdictional 
purview of the Federal government.\5\
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    \5\ ``[T]he vast majority of the nation's water features are 
located within 4,000 feet of a covered tributary, traditional 
navigable water, interstate water, or territorial sea.'' U.S. EPA 
and Department of the Army, Economic Analysis of the EPA-Army Clean 
Water Rule at 11 (May 20, 2015) (``2015 Rule Economic Analysis'') 
(Docket ID: EPA-HQ-OW-2011-0880-20866), available at https://www.regulations.gov/document?D=EPA-HQ-OW-2011-0880-20866.
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    The 2015 Rule also retained exclusions from the definition of 
``waters of the United States'' for prior converted cropland and waste 
treatment systems. Id. at 37105. In addition, the agencies codified 
several exclusions that, in part, reflected longstanding agency 
practice and added others such as ``puddles'' and ``swimming pools'' in 
response to concerns raised by stakeholders during the public comment 
period on the proposed 2015 Rule. Id. at 37096-98, 37105.

B. Legal Challenges to the 2015 Rule

    Following the 2015 Rule's publication, 31 States \6\ and 53 non-
state

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parties, including environmental groups and groups representing 
farming, recreational, forestry, and other interests, filed complaints 
and petitions for review in multiple federal district \7\ and appellate 
\8\ courts challenging the 2015 Rule. In those cases, the challengers 
alleged numerous procedural deficiencies in the development and 
promulgation of the 2015 Rule and substantive deficiencies in the 2015 
Rule itself. Some challengers argued that the 2015 Rule was too 
expansive, while others argued that it excluded too many waters from 
federal jurisdiction.
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    \6\ Alabama, Alaska, Arizona, Arkansas, Colorado, Florida, 
Georgia, Idaho, Indiana, Kansas, Kentucky, Louisiana, Michigan, 
Mississippi, Missouri, Montana, Nebraska, Nevada, New Mexico 
(Environment Department and State Engineer), North Carolina 
(Department of Environment and Natural Resources), North Dakota, 
Ohio, Oklahoma, South Carolina, South Dakota, Tennessee, Texas, 
Utah, West Virginia, Wisconsin, and Wyoming. Iowa joined the legal 
challenge later in the process, bringing the total to 32 States. 
Colorado, New Mexico, and Wisconsin have since withdrawn from 
litigation against the 2015 Rule.
    \7\ U.S. District Courts for the Northern and Southern District 
of Georgia, District of Minnesota, District of North Dakota, 
Southern District of Ohio, Northern District of Oklahoma, Southern 
District of Texas, District of Arizona, Northern District of 
Florida, District of the District of Columbia, Western District of 
Washington, Northern District of California, and Northern District 
of West Virginia. In April 2019, an additional challenge against the 
2015 Rule was filed in the U.S. District Court for the District of 
Oregon.
    \8\ U.S. Court of Appeals for the Second, Fifth, Sixth, Eighth, 
Ninth, Tenth, Eleventh, and District of Columbia Circuits.
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    The day before the 2015 Rule's August 28, 2015 effective date, the 
U.S. District Court for the District of North Dakota preliminarily 
enjoined the 2015 Rule in the 13 States that challenged the rule in 
that court.\9\ The district court found those States were ``likely to 
succeed'' on the merits of their challenge to the 2015 Rule because, 
among other reasons, ``it appears likely that the EPA has violated its 
Congressional grant of authority in its promulgation of the Rule.'' 
North Dakota v. EPA, 127 F. Supp. 3d 1047, 1051 (D.N.D. 2015). In 
particular, the court noted concern that the 2015 Rule's definition of 
``tributary'' ``includes vast numbers of waters that are unlikely to 
have a nexus to navigable waters.'' Id. at 1056. Further, the court 
found that ``it appears likely the EPA failed to comply with 
[Administrative Procedure Act (APA)] requirements when promulgating the 
Rule,'' suggesting that certain distance-based measures were not a 
logical outgrowth of the proposal to the 2015 Rule. Id. at 1058. No 
party sought an interlocutory appeal.
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    \9\ Alaska, Arizona, Arkansas, Colorado, Idaho, Missouri, 
Montana, Nebraska, Nevada, New Mexico, North Dakota, South Dakota, 
and Wyoming. Iowa's motion to intervene in the case was granted 
after issuance of the preliminary injunction. In May 2019, the court 
granted motions from Colorado and New Mexico to withdraw from the 
litigation and lifted the preliminary injunction as to Colorado and 
New Mexico. Order, North Dakota v. EPA, No. 3:15-cv-00059 (D.N.D. 
May 14, 2019). At the same time, the court stated that the 
preliminary injunction would remain in effect as to a plaintiff-
intervenor that represents ten counties in New Mexico. The agencies 
filed a motion seeking clarification of the applicability of the 
court's preliminary injunction to those ten counties in New Mexico. 
Defendants' Motion for Clarification Regarding the Scope of the 
Court's Preliminary Injunction, North Dakota v. EPA, No. 3:15-cv-
00059 (D.N.D. May 24, 2019). As of the time of signature of this 
final rule, that motion is pending before the court.
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    The numerous petitions for review filed in the courts of appeals 
were consolidated in the U.S. Court of Appeals for the Sixth Circuit. 
In that litigation, State and industry petitioners raised concerns 
about whether the 2015 Rule violated the Constitution and the CWA and 
whether its promulgation violated the APA and other statutes. 
Environmental petitioners also challenged the 2015 Rule, claiming that 
the 2015 Rule was too narrow because of the distance limitations and 
other issues. On October 9, 2015, approximately six weeks after the 
2015 Rule took effect in the 37 States, the District of Columbia, and 
U.S. Territories that were not subject to the preliminary injunction 
issued by the District of North Dakota, the Sixth Circuit stayed the 
2015 Rule nationwide after concluding, among other things, that State 
petitioners had demonstrated ``a substantial possibility of success on 
the merits of their claims.'' In re EPA & Dep't of Def. Final Rule, 803 
F.3d 804, 807 (6th Cir. 2015) (``In re EPA'').
    On January 13, 2017, the U.S. Supreme Court granted certiorari on 
the question of whether the courts of appeals have original 
jurisdiction to review challenges to the 2015 Rule. See Nat'l Ass'n of 
Mfrs. v. Dep't of Def., 137 S. Ct. 811 (2017). The Sixth Circuit 
granted petitioners' motion to hold in abeyance the briefing schedule 
in the litigation challenging the 2015 Rule pending a Supreme Court 
decision on the question of the court of appeals' jurisdiction. On 
January 22, 2018, the Supreme Court, in a unanimous opinion, held that 
the 2015 Rule is subject to direct review in the district courts. Nat'l 
Ass'n of Mfrs. v. Dep't of Def., 138 S. Ct. 617, 624 (2018). Throughout 
the pendency of the Supreme Court litigation (and for a short time 
thereafter), the Sixth Circuit's nationwide stay remained in effect. In 
response to the Supreme Court's decision, on February 28, 2018, the 
Sixth Circuit lifted the stay and dismissed the corresponding petitions 
for review. See In re Dep't of Def. & EPA Final Rule, 713 Fed. Appx. 
489 (6th Cir. 2018).
    Since the Supreme Court's jurisdictional ruling, district court 
litigation regarding the 2015 Rule has resumed. At this time, the 2015 
Rule continues to be subject to a preliminary injunction issued by the 
District of North Dakota as to 12 States: Alaska, Arizona, Arkansas, 
Idaho, Iowa, Missouri, Montana, Nebraska, Nevada, North Dakota, South 
Dakota, and Wyoming.\10\ The 2015 Rule also is subject to a preliminary 
injunction issued by the U.S. District Court for the Southern District 
of Georgia as to 11 more States: Georgia, Alabama, Florida, Indiana, 
Kansas, Kentucky, North Carolina, South Carolina, Utah, West Virginia, 
and Wisconsin. Georgia v. Pruitt, 326 F. Supp. 3d 1356, 1364 (S.D. Ga. 
2018). The Southern District of Georgia has since issued an order 
remanding the 2015 Rule to the agencies, finding that the 2015 Rule 
exceeded the agencies' statutory authority under the CWA and was 
promulgated in violation of the APA. Georgia v. Wheeler, No. 2:15-cv-
079, 2019 WL 3949922 (S.D. Ga. Aug. 21, 2019). ``[I]n light of the 
serious defects identified,'' the court retained its preliminary 
injunction against the 2015 Rule. Id. at *36.
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    \10\ As of the date this final rule was signed, it is unclear 
whether the North Dakota district court's preliminary injunction 
also applies to New Mexico. See supra note 10.
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    In September 2018, the U.S. District Court for the Southern 
District of Texas issued a preliminary injunction against the 2015 Rule 
in response to motions filed by the States of Texas, Louisiana, and 
Mississippi and several business associations, finding that enjoining 
the rule would provide ``much needed governmental, administrative, and 
economic stability'' while the rule undergoes judicial review. See 
Texas v. EPA, No. 3:15-cv-162, 2018 WL 4518230, at *1 (S.D. Tex. Sept. 
12, 2018). The court observed that if it did not temporarily enjoin the 
rule, ``it risks asking the states, their governmental subdivisions, 
and their citizens to expend valuable resources and time 
operationalizing a rule that may not survive judicial review.'' Id. In 
May 2019, the court remanded the 2015 Rule to the agencies on the 
grounds that the rule violated the APA. Specifically, the court found 
that the rule violated the APA's notice and comment requirements 
because: (1) The 2015 Rule's definition of ``adjacent'' waters (which 
relied on distance-based limitations) was not a ``logical outgrowth'' 
of the proposal's definition of ``adjacent'' waters (which relied on 
ecologic and hydrologic criteria); and (2) the agencies denied 
interested parties an opportunity to comment on the final version of 
the Connectivity Report,\11\ which served as the technical basis for 
the final rule. See Texas v. EPA, No.

[[Page 56630]]

3:15-cv-162, 2019 WL 2272464 (S.D. Tex. May 28, 2019).
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    \11\ U.S. EPA. Connectivity of Streams and Wetlands to 
Downstream Waters: A Review and Synthesis of the Scientific Evidence 
(Jan. 2015) (EPA/600/R-14/475F).
---------------------------------------------------------------------------

    Moreover, in July 2019, the U.S. District Court for the District of 
Oregon issued a preliminary injunction against the 2015 Rule in the 
State of Oregon. Order, Or. Cattlemen's Ass'n v. EPA, No. 19-00564 (D. 
Or. July 26, 2019). As a result, at this time, the 2015 Rule is 
enjoined in more than half of the States.\12\
---------------------------------------------------------------------------

    \12\ Prior to this final rule, the applicability of the 2015 
Rule in New Mexico has been unclear. See supra note 10.
---------------------------------------------------------------------------

    Three additional States (Ohio, Michigan, and Tennessee) sought a 
preliminary injunction against the 2015 Rule in the U.S. District Court 
for the Southern District of Ohio. In March 2019, the court denied the 
States' motion, finding that the States had ``failed to demonstrate 
that they will suffer imminent and irreparable harm absent an 
injunction.'' See Ohio v. EPA, No. 2:15-cv-02467, 2019 WL 1368850 (S.D. 
Ohio Mar. 26, 2019). The court subsequently denied the States' motion 
for reconsideration of its order denying the preliminary injunction 
motion, and the States have since filed an appeal of the court's order 
in the Sixth Circuit. See Ohio v. EPA, No. 2:15-cv-02467, 2019 WL 
1958650 (S.D. Ohio May 2, 2019); Plaintiffs' Notice of Appeal, Ohio v. 
EPA, No. 2:15-cv-02467 (S.D. Ohio May 28, 2019).
    Parties challenging the 2015 Rule in the U.S. District Court for 
the Northern District of Oklahoma, including the State of Oklahoma and 
the U.S. Chamber of Commerce, also filed a motion for a preliminary 
injunction against the 2015 Rule. In May 2019, the court denied the 
parties' motion, finding that the parties had ``not shown that they 
will suffer irreparable harm if the 2015 Rule is permitted to remain in 
effect while this case is pending.'' See Oklahoma v. EPA, No. 4:15-cv-
00381, slip. op. at 11-12 (N.D. Okla. May 29, 2019). Proceedings in 
this case are stayed pending the parties' appeal of the court's order 
denying a preliminary injunction to the Tenth Circuit. See Order, 
Oklahoma v. EPA, No. 4:15-cv-00381 (N.D. Okla. June 14, 2019).
    Finally, an additional motion for a preliminary injunction against 
the 2015 Rule is pending in the U.S. District Court for the Western 
District of Washington. See Motion for Preliminary Injunction, Wash. 
Cattlemen's Ass'n v. EPA, No. 19-00569 (W.D. Wash. June 14, 2019).

C. Executive Order 13778 and the ``Step One'' Notice of Proposed 
Rulemaking and Supplemental Notice of Proposed Rulemaking

    On February 28, 2017, the President issued Executive Order 13778 
entitled ``Restoring the Rule of Law, Federalism, and Economic Growth 
by Reviewing the `Waters of the United States' Rule.'' Section 1 of the 
Executive Order states, ``[i]t is in the national interest to ensure 
the Nation's navigable waters are kept free from pollution, while at 
the same time promoting economic growth, minimizing regulatory 
uncertainty, and showing due regard for the roles of the Congress and 
the States under the Constitution.'' The Executive Order directs the 
EPA and the Department of the Army to review the 2015 Rule for 
consistency with the policy outlined in Section 1 of the Order and to 
issue a proposed rule rescinding or revising the 2015 Rule as 
appropriate and consistent with law (Section 2). The Executive Order 
also directs the agencies to ``consider interpreting the term 
`navigable waters' . . . in a manner consistent with'' Justice Scalia's 
plurality opinion in Rapanos v. United States, 547 U.S. 715 (2006) 
(Section 3).
    On March 6, 2017, the agencies published a notice of intent to 
review the 2015 Rule and provide notice of a forthcoming proposed 
rulemaking consistent with the Executive Order. 82 FR 12532. Shortly 
thereafter, the agencies announced that they would implement the 
Executive Order in a two-step approach. On July 27, 2017, the agencies 
published the ``Step One'' NPRM (82 FR 34899) that proposed to repeal 
the 2015 Rule and recodify the regulatory text that governed prior to 
the promulgation of the 2015 Rule, consistent with Supreme Court 
decisions and informed by applicable guidance documents and 
longstanding agency practice. The agencies invited comment on the NPRM 
over a 62-day period. On July 12, 2018, the agencies published a 
supplemental notice of proposed rulemaking to clarify, supplement, and 
seek additional comment on the Step One notice of proposed rulemaking. 
83 FR 32227. The agencies invited comment on the SNPRM over a 30-day 
period.
    In developing this final rule, the agencies reviewed approximately 
690,000 public comments received on the NPRM and approximately 80,000 
comments received on the SNPRM from a broad spectrum of interested 
parties. With the NPRM and SNPRM the agencies sought comment on the 
repeal of the 2015 Rule, the recodification of the prior regulations, 
the considerations and agencies' reasons for the proposal, and proposed 
conclusions that the agencies exceeded their authority under the CWA. 
In addition, the public could comment on all aspects of the NPRM, the 
economic analysis for the NPRM, and the SNPRM. Some commenters 
expressed support for the agencies' proposal to repeal the 2015 Rule, 
stating, among other things, that the 2015 Rule exceeds the agencies' 
statutory authority. Other commenters opposed the proposal, stating, 
among other things, that repealing the 2015 Rule will increase 
regulatory uncertainty and adversely impact water quality. A complete 
response to comment document is available in the docket for this final 
rule at Docket ID No. EPA-HQ-OW-2017-0203.

D. The Applicability Date Rule

    On November 22, 2017, the agencies published and solicited public 
comment on a proposal to establish an applicability date for the 2015 
Rule that would be two years from the date of any final rule. 82 FR 
55542. On February 6, 2018, the agencies issued a final rule, 83 FR 
5200, adding an applicability date to the 2015 Rule. The applicability 
date was established as February 6, 2020. When adding an applicability 
date to the 2015 Rule, the agencies clarified that they would continue 
to implement nationwide the previous regulatory definition of ``waters 
of the United States,'' consistent with the practice and procedures the 
agencies implemented long before and immediately following the 2015 
Rule pursuant to the preliminary injunction issued by the District of 
North Dakota and the nationwide stay issued by the Sixth Circuit. The 
agencies further explained that the final applicability date rule would 
ensure regulatory certainty and consistent implementation of the CWA 
nationwide while the agencies reconsider the 2015 Rule and pursue 
further rulemaking to develop a new definition of ``waters of the 
United States.''
    The applicability date rule was challenged in a number of district 
courts by States and environmental organizations. On August 16, 2018, 
the U.S. District Court for the District of South Carolina granted 
summary judgment in favor of the plaintiffs and enjoined the 
applicability date rule nationwide. South Carolina Coastal Conservation 
League, et al., v. Pruitt, 318 F. Supp. 3d 959 (D.S.C. Aug. 16, 2018). 
In addition, on November 26, 2018, the U.S. District Court for the 
Western District of Washington vacated the applicability date rule 
nationwide. Puget Soundkeeper Alliance, et al. v.

[[Page 56631]]

Andrew Wheeler, et al., No. C15-1342-JCC (W.D. Wash. Nov. 26, 2018). As 
a result, the 2015 Rule is now in effect in 22 States.\13\ The 2015 
Rule continues to be subject to preliminary injunctions issued by the 
U.S. District Court for the District of North Dakota, the U.S. District 
Court for the District of Oregon, the U.S. District Court for the 
Southern District of Georgia, and the U.S. District Court for the 
Southern District of Texas in a total of 27 States.\14\
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    \13\ To assist the public in keeping up with the changing 
regulatory landscape of federal jurisdiction under the CWA, the EPA 
has posted a map of current effective regulation by state online at 
https://www.epa.gov/wotus-rule/definition-waters-united-states-rule-status-and-litigation-update.
    \14\ The agencies filed a motion seeking clarification of the 
applicability of the North Dakota district court's preliminary 
injunction to New Mexico. See supra note 10. That motion remains 
pending before the court as of the time of signature of this final 
rule.
---------------------------------------------------------------------------

III. Basis for Repealing the 2015 Rule

A. Legal Authority To Repeal

    The agencies' ability to repeal an existing regulation through 
notice-and-comment rulemaking is well-grounded in the law. The APA 
defines ``rule making'' to mean ``agency process for formulating, 
amending, or repealing a rule.'' 5 U.S.C. 551(5). The CWA complements 
this authority by providing the Administrator with broad authority to 
``prescribe such regulations as are necessary to carry out the 
functions under this Act.'' 33 U.S.C. 1361(a). This broad authority 
includes issuing regulations that repeal or revise CWA implementing 
regulations promulgated by a prior administration.
    As discussed in the NPRM and SNPRM, ``agencies are free to change 
their existing policies as long as they provide a reasoned explanation 
for the change.'' See Encino Motorcars, LLC v. Navarro, 136 S. Ct. 
2117, 2125 (2016) (citations omitted); see also 82 FR 34901; 83 FR 
32231. Agencies may seek to revise or repeal regulations based on 
changes in circumstance or changes in statutory interpretation or 
policy judgments. See, e.g., FCC v. Fox Television Stations, Inc., 556 
U.S. 502, 514-15 (2009) (``Fox''); Ctr. for Sci. in Pub. Interest v. 
Dep't of Treasury, 797 F.2d 995, 998-99 & n.1 (D.C. Cir. 1986). Indeed, 
the agencies' interpretation of the statutes they administer, such as 
the CWA, are not ``instantly carved in stone''; quite the contrary, the 
agencies ``must consider varying interpretations and the wisdom of 
[their] policy on a continuing basis, . . . for example, in response to 
. . . a change in administrations.'' Nat'l Cable & Telecommc'ns Ass'n 
v. Brand X internet Servs., 545 U.S. 967, 981-82 (2005) (``Brand X'') 
(internal quotation marks omitted) (quoting Chevron U.S.A., Inc. v. 
NRDC, 467 U.S. 837, 863-64 (1984)) (citing Motor Vehicle Mfrs. Ass'n v. 
State Farm Mut. Auto. Ins. Co., 463 U.S. 29, 59 (1983) (Rehnquist, J., 
concurring in part and dissenting in part)). As such, a revised 
rulemaking based ``on a reevaluation of which policy would be better in 
light of the facts'' is ``well within an agency's discretion,'' and 
``[a] change in administration brought about by the people casting 
their votes is a perfectly reasonable basis for an executive agency's 
reappraisal'' of its regulations and programs. Nat'l Ass'n of Home 
Builders v. EPA, 682 F.3d 1032, 1038 & 1043 (D.C. Cir. 2012) 
(``NAHB'').
    In providing a reasoned explanation for a change in position, ``an 
agency must also be cognizant that longstanding policies may have 
engendered serious reliance interests that must be taken into 
account.'' Encino Motorcars, 136 S. Ct. at 2126 (internal quotation 
marks and citation omitted). In Encino Motorcars, the Supreme Court 
held that the Department of Labor issued a regulation without the 
necessary ``reasoned explanation'' where the Department ``offered 
barely any explanation'' for changing its position despite ``the 
significant reliance interests involved.'' Id. The Court found that the 
Department ``did not analyze or explain'' why the statute should be 
interpreted in the manner reflected in the new rule and ``said almost 
nothing'' to explain whether there were ``good reasons for the new 
policy.'' Id. at 2127. The Court explained that while a ``summary 
discussion may suffice in other circumstances,'' the Department's 
explanation was particularly inadequate given the ``decades of industry 
reliance on the Department's prior policy.'' Id. at 2126.
    The 2015 Rule, unlike the decades-old regulation discussed in 
Encino Motorcars, has not engendered significant reliance interests. As 
explained in Section II.B, the 2015 Rule has never been in effect 
nationwide, and the applicability of the rule has remained in flux due 
to a shifting set of preliminary injunctions barring implementation of 
the rule in different States across the country. Indeed, over the past 
year alone, the number of States subject to the 2015 Rule has changed 
multiple times. Regardless, the agencies have provided ample 
justification for their change in position. As reflected in this 
preamble to the final rule, the agencies have carefully analyzed their 
statutory and constitutional authority, along with relevant case law, 
and have provided a detailed explanation of their reasons for deciding 
to repeal the 2015 Rule and restore the pre-existing regulations.
    Some commenters found that the agencies provided a reasoned 
explanation to repeal the 2015 Rule given the agencies' concerns that 
the 2015 Rule was inconsistent with the agencies' statutory authority 
and Supreme Court precedent. Commenters also found that the agencies 
provided good reasons for the change in policy, such as the desire to 
balance the objective, goals, and policies of the CWA. Other commenters 
asserted that the agencies have not satisfied the legal requirements 
for revising an existing regulation. Some of these commenters stated 
that the agencies have failed to provide a reasoned explanation to 
support this action or the agencies' change in position and noted that 
a change in administrations is insufficient, in and of itself, to 
support this rule.
    As referenced above, the Supreme Court and lower courts have 
acknowledged that an agency may repeal regulations promulgated by a 
prior administration based on changes in agency policy where ``the 
agency adequately explains the reasons for a reversal of policy.'' 
Brand X, 545 U.S. at 981. The agencies need not demonstrate that the 
reasons for a new policy are better than the reasons for the old one 
because ``it suffices that the new policy is permissible under the 
statute, that there are good reasons for it, and that the agency 
believes it to be better, which the conscious change of course 
adequately indicates.'' Fox, 556 U.S. at 515. Further, ``[w]hen an 
agency changes its existing position, it need not always provide a more 
detailed justification than what would suffice for a new policy created 
on a blank slate.'' Encino Motorcars, 136 S. Ct. at 2125 (citations and 
internal quotation marks omitted).
    Consistent with the APA and applicable case law, the agencies have 
provided a reasoned explanation for repealing the 2015 Rule and 
recodifying the pre-existing regulations, including that the 2015 Rule 
exceeded the scope of statutory authority in certain respects. The 
agencies acknowledge, as some commenters observed, that certain legal 
interpretations and conclusions supporting the agencies' rationale for 
this rulemaking are inconsistent with the agencies' prior 
administrative findings and previous positions taken by the United 
States in legal briefs. However, so long as an agency ``adequately 
explains the reasons for a reversal of policy, change is not

[[Page 56632]]

invalidating.'' Fox, 545 U.S. at 981 (citation and internal quotation 
marks omitted). Indeed, departing from a prior position is proper 
where, as here, the agencies' change in position is based on a 
considered evaluation of the relevant factors following a thorough 
rulemaking process. Throughout this rulemaking process, the agencies 
have clearly identified the issues the agencies were considering in 
deciding whether to finalize this action, and the agencies solicited, 
received, and considered many comments on those issues. See, e.g., 83 
FR 32240-42, 32247-48. The agencies have also thoroughly explained 
their rationale in this preamble to the final rule and in the 
accompanying response to comments document.

B. Legal Background

1. The Clean Water Act
    Congress amended the Federal Water Pollution Control Act (FWPCA), 
or Clean Water Act (CWA) as it is commonly called,\15\ in 1972 to 
address longstanding concerns regarding the quality of the nation's 
waters and the Federal government's ability to address those concerns 
under existing law. Prior to 1972, the ability to control and redress 
water pollution in the nation's waters largely fell to the U.S. Army 
Corps of Engineers (``Corps'') under the Rivers and Harbors Act of 1899 
(RHA). While much of that statute focused on restricting obstructions 
to navigation on the nation's major waterways, section 13 of the RHA 
made it unlawful to discharge refuse ``into any navigable water of the 
United States, or into any tributary of any navigable water from which 
the same shall float or be washed into such navigable water.'' \16\ 33 
U.S.C. 407. Congress had also enacted the Water Pollution Control Act 
of 1948, Public Law 80-845, 62 Stat. 1155 (June 30, 1948), to address 
interstate water pollution, and subsequently amended that statute in 
1956 (giving the statute its current formal name), 1961, and 1965. 
These early versions of the CWA promoted the development of pollution 
abatement programs, required States to develop water quality standards, 
and authorized the Federal government to bring enforcement actions to 
abate water pollution.
---------------------------------------------------------------------------

    \15\ The FWPCA is commonly referred to as the CWA following the 
1977 amendments to the FWPCA. Public Law 95-217, 91 Stat. 1566 
(1977). For ease of reference, the agencies will generally refer to 
the FWPCA in this notice as the CWA or the Act.
    \16\ The term ``navigable water of the United States'' is a term 
of art used to refer to waters subject to federal jurisdiction under 
the RHA. See, e.g., 33 CFR 329.1. The term is not synonymous with 
the phrase ``waters of the United States'' under the CWA, see id., 
and the general term ``navigable waters'' has different meanings 
depending on the context of the statute in which it is used. See, 
e.g., PPL Montana, LLC v. Montana, 132 S. Ct. 1215, 1228 (2012).
---------------------------------------------------------------------------

    These early statutory efforts, however, proved inadequate to 
address the decline in the quality of the nation's waters, see City of 
Milwaukee v. Illinois, 451 U.S. 304, 310 (1981), so Congress performed 
a ``total restructuring'' and ``complete rewriting'' of the existing 
statutory framework in 1972. Id. at 317 (quoting legislative history of 
1972 amendments). That restructuring resulted in the enactment of a 
comprehensive scheme designed to prevent, reduce, and eliminate 
pollution in the nation's waters generally, and to regulate the 
discharge of pollutants into navigable waters specifically. See, e.g., 
S.D. Warren Co. v. Maine Bd. of Envtl. Prot., 547 U.S. 370, 385 (2006) 
(``[T]he Act does not stop at controlling the `addition of pollutants,' 
but deals with `pollution' generally[.]'').
    The objective of the new statutory scheme was ``to restore and 
maintain the chemical, physical, and biological integrity of the 
Nation's waters.'' 33 U.S.C. 1251(a). In order to meet that objective, 
Congress declared two national goals: (1) ``that the discharge of 
pollutants into the navigable waters be eliminated by 1985;'' and (2) 
``that wherever attainable, an interim goal of water quality which 
provides for the protection and propagation of fish, shellfish, and 
wildlife and provides for recreation in and on the water be achieved by 
July 1, 1983 . . . .'' Id. at 1251(a)(1)-(2).
    Congress established several key policies that direct the work of 
the agencies to effectuate those goals. For example, Congress declared 
as a national policy ``that the discharge of toxic pollutants in toxic 
amounts be prohibited; . . . that Federal financial assistance be 
provided to construct publicly owned waste treatment works; . . . that 
areawide waste treatment management planning processes be developed and 
implemented to assure adequate control of sources of pollutants in each 
State; . . . [and] that programs for the control of nonpoint sources of 
pollution be developed and implemented in an expeditious manner so as 
to enable the goals of this Act to be met through the control of both 
point and nonpoint sources of pollution.'' Id. at 1251(a)(3)-(7).
    Congress provided a major role for the States in implementing the 
CWA, balancing the traditional power of States to regulate land and 
water resources within their borders with the need for a national water 
quality regulation. For example, the statute highlighted ``the policy 
of the Congress to recognize, preserve, and protect the primary 
responsibilities and rights of States to prevent, reduce, and eliminate 
pollution'' and ``to plan the development and use . . . of land and 
water resources . . . .'' Id. at 1251(b). Congress also declared as a 
national policy that States manage the major construction grant program 
and implement the core permitting programs authorized by the statute, 
among other responsibilities. Id. Congress added that ``[e]xcept as 
expressly provided in this Act, nothing in this Act shall . . . be 
construed as impairing or in any manner affecting any right or 
jurisdiction of the States with respect to the waters (including 
boundary waters) of such States.'' Id. at 1370.\17\ Congress also 
pledged to provide technical support and financial aid to the States 
``in connection with the prevention, reduction, and elimination of 
pollution.'' Id. at 1251(b).
---------------------------------------------------------------------------

    \17\ 33 U.S.C. 1370 also prohibits authorized States from 
adopting any limitations, prohibitions, or standards that are less 
stringent than required by the CWA.
---------------------------------------------------------------------------

    To carry out these policies, Congress broadly defined ``pollution'' 
to mean ``the man-made or man-induced alteration of the chemical, 
physical, biological, and radiological integrity of water,'' id. at 
1362(19), to parallel the broad objective of the Act ``to restore and 
maintain the chemical, physical, and biological integrity of the 
Nation's waters.'' Id. at 1251(a). Congress then crafted a non-
regulatory statutory framework to provide technical and financial 
assistance to the States to prevent, reduce, and eliminate pollution in 
the nation's waters generally. For example, section 105 of the Act, 
``Grants for research and development,'' authorized EPA ``to make 
grants to any State, municipality, or intermunicipal or interstate 
agency for the purpose of assisting in the development of any project 
which will demonstrate a new or improved method of preventing, 
reducing, and eliminating the discharge into any waters of pollutants 
from sewers which carry storm water or both storm water and 
pollutants.'' 33 U.S.C. 1255(a)(1) (emphasis added). Section 105 also 
authorized EPA ``to make grants to any State or States or interstate 
agency to demonstrate, in river basins or portions thereof, advanced 
treatment and environmental enhancement techniques to control pollution 
from all sources . . . including nonpoint sources, . . . [and] . . . to 
carry out the purposes of section 301 of this Act . . . for research 
and demonstration projects for prevention of pollution of any waters

[[Page 56633]]

by industry including, but not limited to, the prevention, reduction, 
and elimination of the discharge of pollutants.'' 33 U.S.C. 1255(b)-(c) 
(emphasis added); see also id. at 1256(a) (authorizing EPA to issue 
``grants to States and to interstate agencies to assist them in 
administering programs for the prevention, reduction, and elimination 
of pollution''). Section 108, ``Pollution control in the Great Lakes,'' 
authorized EPA to enter into agreements with any state to develop plans 
for the ``elimination or control of pollution, within all or any part 
of the watersheds of the Great Lakes.'' Id. at 1258(a) (emphasis 
added); see also id. at 1268(a)(3)(C) (defining the ``Great Lakes 
System'' as ``all the streams, rivers, lakes, and other bodies of water 
within the drainage basin of the Great Lakes''). Similar broad 
pollution control programs were created for other major watersheds, 
including, for example, the Chesapeake Bay, see id. at 1267(a)(3), Long 
Island Sound, see id. at 1269(c)(2)(D), and Lake Champlain. See id. at 
1270(g)(2).
    In addition to the Act's non-regulatory measures to control 
pollution of the nation's waters generally, Congress created a federal 
regulatory permitting program designed to address the discharge of 
pollutants into a subset of those waters identified as ``navigable 
waters,'' defined as ``the waters of the United States.'' Id. at 
1362(7). Section 301 contains the key regulatory mechanism: ``Except as 
in compliance with this section and sections 302, 306, 307, 318, 402, 
and 404 of this Act, the discharge of any pollutant by any person shall 
be unlawful.'' Id. at 1311(a). A ``discharge of a pollutant'' is 
defined to include ``any addition of any pollutant to navigable waters 
from any point source,'' such as a pipe, ditch or other ``discernible, 
confined and discrete conveyance.'' Id. at 1362(12), (14). The term 
``pollutant'' means ``dredged spoil, solid waste, incinerator residue, 
sewage, garbage, sewage sludge, munitions, chemical wastes, biological 
materials, radioactive materials, heat, wrecked or discarded equipment, 
rock, sand, cellar dirt and industrial, municipal, and agricultural 
waste discharged into water.'' Id. at 1362(6). Thus, it is unlawful to 
discharge pollutants into waters of the United States from a point 
source unless the discharge is in compliance with certain enumerated 
sections of the CWA, including obtaining authorizations pursuant to the 
section 402 National Pollutant Discharge Elimination System (NPDES) 
permit program or the section 404 dredged or fill material permit 
program. See id. at 1342 and 1344. Congress therefore hoped to achieve 
the Act's objective ``to restore and maintain the chemical, physical, 
and biological integrity of the Nation's waters'' by addressing 
pollution of all waters via non-regulatory means and federally 
regulating the discharge of pollutants to the subset of waters 
identified as ``navigable waters.'' \18\
---------------------------------------------------------------------------

    \18\ Members of Congress were aware when they drafted the 1972 
CWA amendments that different types of the Nation's waters would be 
subject to different degrees of federal control. For instance, in 
House Debate regarding a proposed and ultimately failed amendment to 
prohibit the discharge of pollutants to ground waters in addition to 
navigable waters, Representative Don H. Clausen stated, ``Mr. 
Chairman, in the early deliberations within the committee which 
resulted in the introduction of H.R. 11896, a provision for ground 
waters . . . was thoroughly reviewed and it was determined by the 
committee that there was not sufficient information on ground waters 
to justify the types of controls that are required for navigable 
waters. I refer the gentleman to the objectives of this act as 
stated in section 101(a). The objective of this act is to restore 
and maintain the chemical, physical, and biological integrity of the 
Nation's waters. I call your attention to the fact that this does 
not say the Nation's `navigable waters,' `interstate waters,' or 
`intrastate waters.' It just says `waters.' This includes ground 
waters.'' 118 Cong. Rec. at 10,667 (daily ed. March 28, 1972).
---------------------------------------------------------------------------

    Some commenters disagreed that the CWA distinguishes between the 
``nation's waters'' and a subset of those waters known as the 
``navigable waters.'' Many of these commenters suggested that the 
agencies' interpretation is not supported by the text or structure of 
the Act and is based instead on selectively quoting from and 
mischaracterizing the Act's provisions. Other commenters argued that 
the two terms are synonymous under the Act.
    Fundamental principles of statutory interpretation support the 
agencies' recognition of a distinction between the ``nation's waters'' 
and ``navigable waters.'' As the Supreme Court has observed, ``[w]e 
assume that Congress used two terms because it intended each term to 
have a particular, nonsuperfluous meaning.'' Bailey v. United States, 
516 U.S. 137, 146 (1995) (recognizing the canon of statutory 
construction against superfluity). Further, ``the words of a statute 
must be read in their context and with a view to their place in the 
overall statutory scheme.'' FDA v. Brown & Williamson Tobacco Corp., 
529 U.S. 120, 133 (2000) (internal quotation marks and citation 
omitted); see also United Savings Ass'n v. Timbers of Inwood Forest 
Associates, 484 U.S. 365, 371 (``Statutory construction . . . is a 
holistic endeavor. A provision that may seem ambiguous in isolation is 
often clarified by the remainder of the statutory scheme--because the 
same terminology is used elsewhere in a context that makes its meaning 
clear[.]'') (citation omitted). Here, the non-regulatory sections of 
the CWA reveal Congress' intent to restore and maintain the integrity 
of the nation's waters using federal assistance to support State and 
local partnerships to control pollution in the nation's waters in 
addition to a federal regulatory prohibition on the discharge of 
pollutants into the navigable waters.
    Under this statutory scheme, the States are responsible for 
developing water quality standards for ``waters of the United States'' 
within their borders and reporting on the condition of those waters to 
EPA every two years. 33 U.S.C. 1313, 1315. States must develop total 
maximum daily loads (TMDLs) for waters that are not meeting established 
water quality standards and must submit those TMDLs to EPA for 
approval. Id. at 1313(d). States also have authority to issue water 
quality certifications or waive certification for every federal permit 
or license issued within their borders that may result in a discharge 
to navigable waters. Id. at 1341.
    These same regulatory authorities can be assumed by Indian tribes 
under section 518 of the CWA, which authorizes the EPA to treat 
eligible Indian tribes with reservations in a manner similar to States 
for a variety of purposes, including administering each of the 
principal CWA regulatory programs. Id. at 1377(e). In addition, States 
and Tribes retain authority to protect and manage the use of those 
waters that are not navigable waters under the CWA. See, e.g., id. at 
1251(b), 1251(g), 1370, 1377(a). At this time, forty-seven States 
administer the CWA section 402 permit program for those ``waters of the 
United States'' within their boundaries,\19\ and two States (Michigan 
and New Jersey) administer the section 404 permit program for those 
waters that are assumable by States pursuant to section 404(g). At 
present, no Tribes administer the section 402 or 404 programs, although 
some are exploring the possibility.
---------------------------------------------------------------------------

    \19\ Three States (Massachusetts, New Hampshire, and New Mexico) 
do not currently administer any part of the CWA section 402 program.
---------------------------------------------------------------------------

    The agencies have developed regulatory programs designed to ensure 
that the full statute is implemented as Congress intended. See, e.g., 
Hibbs v. Winn, 542 U.S. 88, 101 (2004) (``A statute should be construed 
so that effect is given to all its provisions, so that no part will be 
inoperative or superfluous, void or insignificant.''). This includes 
pursuing the overall ``objective'' of the CWA to ``restore and

[[Page 56634]]

maintain the chemical, physical, and biological integrity of the 
Nation's waters,'' 33 U.S.C. 1251(a), while implementing the specific 
``policy'' directives from Congress to, among other things, 
``recognize, preserve, and protect the primary responsibilities and 
rights of States to prevent, reduce, and eliminate pollution'' and ``to 
plan the development and use . . . of land and water resources.'' Id. 
at 1251(b); see also Webster's II, New Riverside University Dictionary 
(1994) (defining ``policy'' as a ``plan or course of action, as of a 
government[,] designed to influence and determine decisions and 
actions;'' an ``objective'' is ``something worked toward or aspired to: 
Goal'').\20\ The agencies therefore recognize a distinction between the 
specific word choices of Congress, including the need to develop 
regulatory programs that aim to accomplish the goals of the Act while 
implementing the specific policy directives of Congress.\21\ To do so, 
the agencies must determine what Congress had in mind when it defined 
``navigable waters'' in 1972 as simply ``the waters of the United 
States.''
---------------------------------------------------------------------------

    \20\ The legislative history of the CWA further illuminates the 
distinction between the terms ``policy'' and ``objective,'' or 
``goal.'' As Congress drafted the 1972 CWA amendments, the Senate 
bill set the ``no-discharge of pollutants into the navigable water 
by 1985'' provision as a policy whereas the House bill set it as a 
goal. The Act was ultimately passed with the ``no-discharge by 
1985'' provision established as a goal. See 33 U.S.C 1251(a)(1). In 
House consideration of the Conference Report, Congressman Jones 
captured the policy versus goal distinction in Section 101(a)(1) as 
follows: ``The objective of this legislation is to restore and 
preserve for the future the integrity of our Nation's waters. The 
bill sets forth as a national goal the complete elimination of all 
discharges into our navigable waters by 1985, but . . . the 
conference report states clearly that achieving the 1985 target date 
is a goal, not a national policy. As such, it serves as a focal 
point for long-range planning, and for research and development in 
water pollution control technology. . . . While it is our hope that 
we can succeed in eliminating all discharge into our waters by 1985, 
without unreasonable impact on the national life, we recognized in 
this report that too many imponderables exist, some still beyond our 
horizons, to prescribe this goal today as a legal requirement.'' 118 
Cong. Rec. H. 33749 (daily ed. October 4, 1972).
    \21\ See, e.g., Nat'l Fed'n of Indep. Bus. v. Sebelius, 567 U.S. 
519, 544, (2012) (``Where Congress uses certain language in one part 
of a statute and different language in another, it is generally 
presumed that Congress acts intentionally.''); Russello v. United 
States, 464 U.S. 16, 23 (1983) (``[Where] Congress includes 
particular language in one section of a statute but omits it in 
another section of the same Act, it is generally presumed that 
Congress acts intentionally and purposely in the disparate inclusion 
or exclusion.''); see also Crandon v. United States, 494 U.S. 152, 
158 (1990) (``In determining the meaning of the statute, we look not 
only to the particular statutory language, but to the design of the 
statute as a whole and to its object and policy.'') (emphasis 
added).
---------------------------------------------------------------------------

    Congress' authority to regulate ``navigable waters'' derives from 
its power to regulate the ``channels of interstate commerce'' under the 
Commerce Clause. Gibbons v. Ogden, 22 U.S. (9 Wheat.) 1 (1824); see 
also United States v. Lopez, 514 U.S. 549, 558-59 (1995) (describing 
the ``channels of interstate commerce'' as one of three areas of 
congressional authority under the Commerce Clause). The Supreme Court 
explained in SWANCC that the term ``navigable'' indicates ``what 
Congress had in mind as its authority for enacting the Clean Water Act: 
Its traditional jurisdiction over waters that were or had been 
navigable in fact or which could reasonably be so made.'' 531 U.S. 159, 
172 (2001). The Court further explained that nothing in the legislative 
history of the Act provides any indication that ``Congress intended to 
exert anything more than its commerce power over navigation.'' Id. at 
168 n.3. The Supreme Court, however, has recognized that Congress 
intended ``to exercise its powers under the Commerce Clause to regulate 
at least some waters that would not be deemed `navigable' under the 
classical understanding of that term.'' Riverside Bayview, 474 U.S. at 
133; see also SWANCC, 531 U.S. at 167.
    The classical understanding of the term navigable was first 
articulated by the Supreme Court in The Daniel Ball:

    Those rivers must be regarded as public navigable rivers in law 
which are navigable in fact. And they are navigable in fact when 
they are used, or are susceptible of being used, in their ordinary 
condition, as highways of commerce, over which trade and travel are 
or may be conducted in the customary modes of trade and travel on 
water. And they constitute navigable waters of the United States 
within the meaning of the Acts of Congress, in contradistinction 
from the navigable waters of the States, when they form in their 
ordinary condition by themselves, or by uniting with other waters, a 
continued highway over which commerce is or may be carried on with 
other States or foreign countries in the customary modes in which 
such commerce is conducted by water.

77 U.S. (10 Wall.) 557, 563 (1871). Over the years, this traditional 
test has been expanded to include waters that had been used in the past 
for interstate commerce, see Economy Light & Power Co. v. United 
States, 256 U.S. 113, 123 (1921), and waters that are susceptible for 
use with reasonable improvement. See United States v. Appalachian Elec. 
Power Co., 311 U.S. 377, 407-10 (1940).
    By the time the 1972 CWA amendments were enacted, the Supreme Court 
had held that Congress' authority over the channels of interstate 
commerce was not limited to regulation of the channels themselves but 
could extend to activities necessary to protect the channels. See 
Oklahoma ex rel. Phillips v. Guy F. Atkinson Co., 313 U.S. 508, 523 
(1941) (``Congress may exercise its control over the non-navigable 
stretches of a river in order to preserve or promote commerce on the 
navigable portions.''). The Supreme Court also had clarified that 
Congress could regulate waterways that formed a part of a channel of 
interstate commerce, even if they are not themselves navigable or do 
not cross state boundaries. See Utah v. United States, 403 U.S. 9, 11 
(1971).
    These developments were discussed during the legislative process 
leading up to the passage of the 1972 CWA amendments, and certain 
members referred to the scope of the amendments as encompassing 
waterways that serve as a ``link in the chain'' of interstate commerce 
as it flows through various channels of transportation, such as 
railroads and highways. See, e.g., 118 Cong. Rec. 33756-57 (1972) 
(statement of Rep. Dingell); 118 Cong. Rec. 33699 (Oct. 4, 1972) 
(statement of Sen. Muskie).\22\ Other references suggest that 
congressional committees at least contemplated applying the ``control 
requirements'' of the Act ``to the navigable waters, portions thereof, 
and their tributaries.'' S. Rep. No. 92-414, 92nd Cong., 1st Sess. at 
77 (1971). And in 1977, when Congress authorized State assumption over 
the section 404 dredged or fill material permitting program, Congress 
limited the scope of assumable waters by requiring the Corps to retain 
permitting authority over Rivers and Harbors Act waters (as identified 
by The Daniel Ball test) plus wetlands adjacent to those waters, minus 
historic use only waters. See 33 U.S.C. 1344(g)(1).\23\ This suggests 
that Congress had in mind a broader scope of waters subject to CWA 
jurisdiction than waters traditionally understood as navigable. See 
SWANCC, 531 U.S. at 171; Riverside Bayview, 474 U.S. at 138 n.11.
---------------------------------------------------------------------------

    \22\ The agencies recognize that individual member statements 
are not a substitute for full congressional intent, but they do help 
provide context for issues that were discussed during the 
legislative debates. For a detailed discussion of the legislative 
history of the 1972 CWA amendments, see Albrecht & Nickelsburg, 
Could SWANCC Be Right? A New Look at the Legislative History of the 
Clean Water Act, 32 ELR 11042 (Sept. 2002).
    \23\ For a detailed discussion of the legislative history 
supporting the enactment of section 404(g), see Final Report of the 
Assumable Waters Subcommittee (May 2017), App. F.
---------------------------------------------------------------------------

    Thus, Congress intended to assert federal authority over more than 
just waters traditionally understood as navigable, and Congress rooted 
that authority in ``its commerce power over navigation.'' SWANCC, 531 
U.S. at 168 n.3. However, there must be a limit to that authority and 
to what water is

[[Page 56635]]

subject to federal jurisdiction. How the agencies should exercise that 
authority has been the subject of dispute for decades, but the Supreme 
Court on three occasions has analyzed the issue and provided some 
instructional guidance.
2. U.S. Supreme Court Precedent
a. Adjacent Wetlands
    In Riverside Bayview, the Supreme Court considered the Corps' 
assertion of jurisdiction over ``low-lying, marshy land'' immediately 
abutting a water traditionally understood as navigable on the grounds 
that it was an ``adjacent wetland'' within the meaning of the Corps' 
then-existing regulations. 474 U.S. at 124. The Court addressed the 
question whether non-navigable wetlands may be regulated as ``waters of 
the United States'' on the basis that they are ``adjacent to'' 
navigable-in-fact waters and ``inseparably bound up with'' them because 
of their ``significant effects on water quality and the aquatic 
ecosystem.'' See id. at 131-35 & n.9.
    In determining whether to give deference to the Corps' assertion of 
jurisdiction over adjacent wetlands, the Court acknowledged the 
difficulty in determining where the limits of federal jurisdiction end, 
noting that the line is somewhere between open water and dry land:

    In determining the limits of its power to regulate discharges 
under the Act, the Corps must necessarily choose some point at which 
water ends and land begins. Our common experience tells us that this 
is often no easy task: the transition from water to solid ground is 
not necessarily or even typically an abrupt one. Rather, between 
open waters and dry land may lie shallows, marshes, mudflats, 
swamps, bogs--in short, a huge array of areas that are not wholly 
aquatic but nevertheless fall far short of being dry land. Where on 
this continuum to find the limit of ``waters'' is far from obvious.

Id. at 132 (emphasis added). Within this statement, the Supreme Court 
identifies a basic principle for adjacent wetlands: The limits of 
jurisdiction lie within the ``continuum'' or ``transition'' ``between 
open waters and dry land.'' Observing that Congress intended the CWA 
``to regulate at least some waters that would not be deemed 
`navigable,''' the Court therefore held that it is ``a permissible 
interpretation of the Act'' to conclude that ``a wetland that actually 
abuts on a navigable waterway'' falls within the ``definition of 
`waters of the United States.''' Id. at 133, 135. Thus, a wetland that 
abuts a water traditionally understood as navigable is subject to CWA 
jurisdiction because it is ``inseparably bound up with the `waters' of 
the United States.'' Id. at 134. ``This holds true even for wetlands 
that are not the result of flooding or permeation by water having its 
source in adjacent bodies of open water.'' Id. The Court also noted 
that the agencies can establish categories of jurisdiction for adjacent 
wetlands. See id. at 135 n.9.
    The Supreme Court in Riverside Bayview declined to decide whether 
wetlands that are not adjacent to navigable waters could also be 
regulated by the agencies. See id. at 124 n.2 & 131 n.8. In SWANCC a 
few years later, however, the Supreme Court analyzed a similar question 
but in the context of an abandoned sand and gravel pit located some 
distance from a traditional navigable water, with excavation trenches 
that ponded--some only seasonally--and served as habitat for migratory 
birds. 531 U.S. at 162-64. The Supreme Court rejected the government's 
stated rationale for asserting jurisdiction over these ``nonnavigable, 
isolated, intrastate waters'' as outside the scope of CWA jurisdiction. 
Id. at 171-72. In doing so, the Supreme Court noted that Riverside 
Bayview upheld ``jurisdiction over wetlands that actually abutted on a 
navigable waterway'' because the wetlands were ``inseparably bound up 
with the `waters' of the United States.'' Id. at 167.\24\ As summarized 
by the SWANCC majority:
---------------------------------------------------------------------------

    \24\ For additional context, at oral argument during Riverside 
Bayview, the government attorney characterized the wetland at issue 
as ``in fact an adjacent wetland, adjacent--by adjacent, I mean it 
is immediately next to, abuts, adjoins, borders, whatever other 
adjective you might want to use, navigable waters of the United 
States.'' Transcript of Oral Argument at 16, United States v. 
Riverside Bayview Homes, Inc., 474 U.S. 121 (1985) (No. 84-701).

    It was the significant nexus between the wetlands and 
``navigable waters'' that informed our reading of the CWA in 
Riverside Bayview Homes. Indeed, we did not ``express any opinion'' 
on the ``question of authority of the Corps to regulate discharges 
of fill material into wetlands that are not adjacent to bodies of 
open water. . . . In order to rule for [the Corps] here, we would 
have to hold that the jurisdiction of the Corps extends to ponds 
that are not adjacent to open water. But we conclude that the text 
---------------------------------------------------------------------------
of the statute will not allow this.

Id. at 167-68 (citations omitted).
    The Court also rejected the argument that the use of the abandoned 
ponds by migratory birds fell within the power of Congress to regulate 
activities that in the aggregate have a substantial effect on 
interstate commerce, or that the CWA regulated the use of the ponds as 
a municipal landfill because such use was commercial in nature. Id. at 
173. Such arguments, the Court noted, raised ``significant 
constitutional questions.'' Id. ``Where an administrative 
interpretation of a statute invokes the outer limits of Congress' 
power, we expect a clear indication that Congress intended that 
result.'' Id. at 172-73 (``Congress does not casually authorize 
administrative agencies to interpret a statute to push the limit of 
congressional authority.''). This is particularly true ``where the 
administrative interpretation alters the federal-state framework by 
permitting federal encroachment upon a traditional state power.'' Id. 
at 173; see also Atascadero State Hospital v. Scanlon, 473 U.S. 234, 
242-43 (1985) (``If Congress intends to alter the `usual constitutional 
balance between the States and the Federal Government,' it must make 
its intention to do so `unmistakably clear in the language of the 
statute[.]'''); Gregory v. Ashcroft, 501 U.S. 452, 460-61 (1991) (``the 
plain statement rule . . . acknowledg[es] that the States retain 
substantial sovereign powers under our constitutional scheme, powers 
with which Congress does not readily interfere''). ``Rather than 
expressing a desire to readjust the federal-state balance in this 
manner, Congress chose [in the CWA] to `recognize, preserve, and 
protect the primary responsibilities and rights of States . . . to plan 
the development and use . . . of land and water resources . . . .'' 
SWANCC, 531 U.S. at 174 (quoting 33 U.S.C. 1251(b)). The Court found no 
clear statement from Congress that it had intended to permit federal 
encroachment on traditional State power and construed the CWA to avoid 
the significant constitutional questions related to the scope of 
federal authority authorized therein. Id.\25\
---------------------------------------------------------------------------

    \25\ The agencies note that during oral argument in SWANCC, 
Justice Kennedy stated, ``[T]his case, it seems to me, does point up 
the problem that petitioner's counsel raised quoting from page 1 of 
the blue brief, `it is the primary responsibility of the states to 
eliminate pollution and to plan development and use of land' . . . 
It seems to me that this illustrates that the way in which the Corps 
has promulgated its regulation departs from the design of the 
statute.'' (emphasis added). Transcript of Oral Argument at 40, 
Solid Waste Agency of Northern Cook County v. U.S. Army Corps of 
Engineers, 531 U.S. 159 (2001) (No. 99-1178). And several years 
later, in oral argument in Rapanos, after U.S. Solicitor General 
Clement stated, ``[W]hat Congress recognized in 1972 is that they 
had to regulate beyond traditional navigable waters,'' Justice 
Kennedy immediately replied, ``But the Congress in 1972 also . . . 
said it's a statement of policy to reserve to the States the power 
and the responsibility to plan land use and water resources. And 
under your definition, I just see that we're giving no scope at all 
to that clear statement of the congressional policy.'' Transcript of 
Oral Argument at 58, Rapanos v. United States and Carabell v. United 
States, 547 U.S. 715 (2006) (Nos. 04-1034, 04-1384).
---------------------------------------------------------------------------

    Several years after SWANCC, the Supreme Court considered the 
concept

[[Page 56636]]

of adjacency in consolidated cases arising out of the Sixth Circuit. 
See Rapanos v. United States, 547 U.S. 715 (2006). In one case, the 
Corps had determined that wetlands on three separate sites were subject 
to CWA jurisdiction because they were adjacent to ditches or man-made 
drains that eventually connected to traditional navigable waters 
several miles away through other ditches, drains, creeks, and/or 
rivers. Id. at 719-20, 729. In another case, the Corps had asserted 
jurisdiction over a wetland separated from a man-made drainage ditch by 
a four-foot-wide man-made berm. Id. at 730. The ditch emptied into 
another ditch, which then connected to a creek, and eventually 
connected to Lake St. Clair, a traditional navigable water, 
approximately a mile from the parcel at issue. The berm was largely or 
entirely impermeable but may have permitted occasional overflow from 
the wetland to the ditch. Id. The Court, in a fractured opinion, 
vacated and remanded the Sixth Circuit's decision upholding the Corps' 
asserted jurisdiction over the four wetlands at issue, with Justice 
Scalia writing for the plurality and Justice Kennedy concurring in the 
judgment but on alternate grounds. Id. at 757 (plurality), 787 
(Kennedy, J., concurring).
    The plurality determined that CWA jurisdiction only extended to 
adjacent ``wetlands with a continuous surface connection to bodies that 
are `waters of the United States' in their own right, so that there is 
no clear demarcation between `waters' and wetlands.'' Id. at 742. The 
plurality then concluded that ``establishing . . . wetlands . . . 
covered by the Act requires two findings: First, that the adjacent 
channel contains a `wate[r] of the United States,' (i.e., a relatively 
permanent body of water connected to traditional interstate navigable 
waters); and second, that the wetland has a continuous surface 
connection with that water, making it difficult to determine where the 
`water' ends and the `wetland' begins.'' Id. (alteration in original).
    In reaching the adjacency component of the two-part analysis, the 
plurality interpreted Riverside Bayview, and its subsequent SWANCC 
decision characterizing Riverside Bayview, as authorizing jurisdiction 
over wetlands that physically abutted traditional navigable waters. Id. 
at 740-42. The plurality focused on the ``inherent ambiguity'' 
described in Riverside Bayview in determining where on the continuum 
between open waters and dry land the scope of federal jurisdiction 
should end. Id. at 740. It was ``the inherent difficulties of defining 
precise bounds to regulable waters,'' id. at 741 n.10, according to the 
plurality, that prompted the Court in Riverside Bayview to defer to the 
Corps' inclusion of adjacent wetlands as ``waters'' subject to CWA 
jurisdiction based on proximity. Id. at 741 (``When we characterized 
the holding of Riverside Bayview in SWANCC, we referred to the close 
connection between waters and the wetlands they gradually blend into: 
`It was the significant nexus between the wetlands and `navigable 
waters' that informed our reading of the CWA in Riverside Bayview 
Homes.'''); see also Riverside Bayview, 474 U.S. 134, quoting 42 FR 
37128 (July 19, 1977) (``For this reason, the landward limit of Federal 
jurisdiction under Section 404 must include any adjacent wetlands that 
form the border of or are in reasonable proximity to other waters of 
the United States, as these wetlands are part of this aquatic 
system.''). The plurality also noted that ``SWANCC rejected the notion 
that the ecological considerations upon which the Corps relied in 
Riverside Bayview . . . provided an independent basis for including 
entities like `wetlands' (or `ephemeral streams') within the phrase 
`the waters of the United States.' SWANCC found such ecological 
considerations irrelevant to the question whether physically isolated 
waters come within the Corps' jurisdiction.'' Id. at 741-42 (original 
emphasis).
    Justice Kennedy disagreed with the plurality's conclusion that 
adjacency requires a ``continuous surface connection'' to covered 
waters. Id. at 772. In reading the phrase ``continuous surface 
connection'' to mean a continuous ``surface-water connection,'' id. at 
776, and interpreting the plurality's standard to include a ``surface-
water-connection requirement,'' id. at 774, Justice Kennedy stated that 
``when a surface-water connection is lacking, the plurality forecloses 
jurisdiction over wetlands that abut navigable-in-fact waters--even 
though such navigable waters were traditionally subject to federal 
authority.'' Id. at 776. He noted that the Riverside Bayview Court 
``deemed it irrelevant whether `the moisture creating the wetlands . . 
. find[s] its source in the adjacent bodies of water.'' Id. at 772 
(citations omitted).
    The plurality did not directly address the precise distinction 
raised by Justice Kennedy. It did note in response that the ``Riverside 
Bayview opinion required'' a ``continuous physical connection,'' id. at 
751 n.13 (emphasis added), and focused on evaluating adjacency between 
a ``water'' and a wetland ``in the sense of possessing a continuous 
surface connection that creates the boundary-drawing problem we 
addressed in Riverside Bayview.'' Id. at 757. The plurality also 
explained that its standard includes a ``physical-connection 
requirement'' between wetlands and covered waters. Id. at 751 n.13. In 
other words, the plurality appeared to be more focused on the abutting 
nature rather than the source of water creating the wetlands at issue 
in Riverside Bayview to describe the legal constructs applicable to 
adjacent wetlands. See id. at 747; see also Webster's II, New Riverside 
University Dictionary (1994) (defining ``abut'' to mean ``to border 
on'' or ``to touch at one end or side of something''). The plurality 
agreed with Justice Kennedy and the Riverside Bayview Court that ``[a]s 
long as the wetland is `adjacent' to covered waters . . . its creation 
vel non by inundation is irrelevant.'' Id. at 751 n.13.\26\
---------------------------------------------------------------------------

    \26\ The agencies' 2008 Rapanos Guidance recognizes that the 
plurality's ``continuous surface connection'' does not refer to a 
continuous surface water connection. See, e.g., Rapanos Guidance at 
7 n.28 (``A continuous surface connection does not require surface 
water to be continuously present between the wetland and the 
tributary.'').
---------------------------------------------------------------------------

    Because wetlands with a physically remote hydrologic connection do 
not raise the same boundary-drawing concerns presented by actually 
abutting wetlands, the plurality determined that ``inherent ambiguity 
in defining where water ends and abutting (`adjacent') wetlands begin'' 
upon which Riverside Bayview rests does not apply to such features. Id. 
at 742 (``Wetlands with only an intermittent, physically remote 
hydrologic connection to `waters of the United States' do not implicate 
the boundary-drawing problem of Riverside Bayview, and thus lack the 
necessary connection to covered waters that we described as a 
`significant nexus' in SWANCC[.]''). The plurality supported this 
position by referring to the Court's treatment of certain isolated 
waters in SWANCC as non-jurisdictional. Id. 741-42 (``We held that 
`nonnavigable, isolated, intrastate waters--which, unlike the wetlands 
at issue in Riverside Bayview, did not `actually abu[t] on a navigable 
waterway,'--were not included as `waters of the United States.'''). It 
interpreted the reasoning of SWANCC to exclude those waters. The 
plurality found ``no support for the inclusion of physically 
unconnected wetlands as covered `waters''' based on Riverside Bayview's 
treatment of the Corps' definition of adjacent. Id. at 747; see also 
id. at 746 (``the Corps' definition of `adjacent' . . . has been 
extended beyond reason.'').

[[Page 56637]]

    Although ultimately concurring in judgment, Justice Kennedy focused 
on the ``significant nexus'' between adjacent wetlands and traditional 
navigable waters as the basis for determining whether a wetland is 
subject to CWA jurisdiction. He quotes the SWANCC decision, which 
explains, ``[i]t was the significant nexus between wetlands and 
navigable waters . . . that informed our reading of the [Act] in 
Riverside Bayview Homes.'' 531 U.S. at 167. Justice Kennedy also 
interpreted the reasoning of SWANCC to exclude certain isolated waters. 
His opinion notes that: ``Because such a nexus was lacking with respect 
to isolated ponds, the Court held that the plain text of the statute 
did not permit the Corps' action.'' 547 U.S. at 767 (internal 
quotations and citations omitted). Justice Kennedy notes that the 
wetlands at issue in Riverside Bayview were ``adjacent to [a] 
navigable-in-fact waterway[],'' while the ``ponds and mudflats'' 
considered in SWANCC ``were isolated in the sense of being unconnected 
to other waters covered by the Act.'' Id. at 765-66. ``Taken together, 
these cases establish that in some instances, as exemplified by 
Riverside Bayview, the connection between a nonnavigable water or 
wetland and a navigable water may be so close, or potentially so close, 
that the Corps may deem the water or wetland a `navigable water' under 
the Act. In other instances, as exemplified by SWANCC, there may be 
little or no connection. Absent a significant nexus, jurisdiction under 
the Act is lacking.'' Id. at 767.
    According to Justice Kennedy, whereas the isolated ponds and 
mudflats in SWANCC lack a ``significant nexus'' to navigable waters, it 
is the ``conclusive standard for jurisdiction'' based on ``a reasonable 
inference of ecological interconnection'' between adjacent wetlands and 
navigable-in-fact waters that allows for their categorical inclusion as 
``waters of the United States.'' Id. at 780 (``[T]he assertion of 
jurisdiction for those wetlands [adjacent to navigable-in-fact waters] 
is sustainable under the act by showing adjacency alone.''). Justice 
Kennedy surmised that it may be that the same rationale ``without any 
inquiry beyond adjacency . . . could apply equally to wetlands adjacent 
to certain major tributaries.'' Id. He noted that the Corps could 
establish by regulation categories of tributaries based on volume of 
flow, proximity to navigable waters, or other relevant factors that 
``are significant enough that wetlands adjacent to them are likely, in 
the majority of cases, to perform important functions for an aquatic 
system incorporating navigable waters.'' Id. at 780-81. However, 
``[t]he Corps' existing standard for tributaries'' provided Justice 
Kennedy ``no such assurance'' to infer the categorical existence of a 
requisite nexus between waters traditionally understood as navigable 
and wetlands adjacent to nonnavigable tributaries. Id. at 781. That is 
because:

the breadth of [the tributary] standard--which seems to leave wide 
room for regulation of drains, ditches, and streams remote from any 
navigable-in-fact water and carrying only minor water volumes 
towards it--precludes its adoption as the determinative measure of 
whether adjacent wetlands are likely to play an important role in 
the integrity of an aquatic system comprising navigable waters as 
traditionally understood. Indeed, in many cases wetlands adjacent to 
tributaries covered by this standard might appear little more 
related to navigable-in-fact waters than were the isolated ponds 
held to fall beyond the Act's scope in SWANCC.

Id. at 781-82.
    To avoid this outcome, Justice Kennedy stated that, absent 
development of a more specific regulation and categorical inclusion of 
wetlands adjacent to ``certain major'' or even ``minor'' tributaries as 
was established in Riverside Bayview, id. at 780-81, the Corps ``must 
establish a significant nexus on a case-by-case basis when it seeks to 
regulate wetlands based on adjacency to nonnavigable tributaries. Given 
the potential overbreadth of the Corps' regulations, this showing is 
necessary to avoid unreasonable applications of the statute.'' Id. at 
782. Justice Kennedy stated that adjacent ``wetlands possess the 
requisite nexus, and thus come within the statutory phrase `navigable 
waters,' if the wetlands, either alone or in combination with similarly 
situated lands in the region, significantly affect the chemical, 
physical, and biological integrity of other covered waters more readily 
understood as `navigable.''' Id. at 780. ``Where an adequate nexus is 
established for a particular wetland, it may be permissible, as a 
matter of administrative convenience or necessity, to presume covered 
status for other comparable wetlands in the region.'' Id. at 782.
    In establishing this significant nexus test, Justice Kennedy 
relied, in part, on the overall objective of the CWA to ``restore and 
maintain the chemical, physical, and biological integrity of the 
Nation's waters.'' Id. at 779 (quoting 33 U.S.C. 1251(a)). However, 
Justice Kennedy also acknowledged that ``environmental concerns provide 
no reason to disregard limits in the statutory text.'' Id. at 778. With 
respect to wetlands adjacent to nonnavigable tributaries, Justice 
Kennedy therefore determined that ``mere adjacency . . . is 
insufficient. A more specific inquiry, based on the significant-nexus 
standard, is . . . necessary.'' Id. at 786. By not requiring adjacent 
wetlands to possess a significant nexus with navigable waters, Justice 
Kennedy noted that under the Corps' interpretation, federal regulation 
would be permitted ``whenever wetlands lie alongside a ditch or drain, 
however remote or insubstantial, that eventually may flow into 
traditional navigable waters. The deference owed the Corps' 
interpretation of the statute does not extend so far.'' Id. at 778-79.
    In summary, although the standards that the plurality and Justice 
Kennedy established are not identical, and each standard excludes some 
waters that the other standard does not, the standards contain 
substantial similarities. The plurality and Justice Kennedy agree in 
principle that the determination must be made using a basic two-step 
approach that considers: (1) The connection of the wetland to the 
tributary; and (2) the status of the tributary with respect to 
downstream traditional navigable waters. The plurality and Justice 
Kennedy also agree that the connection between the wetland and the 
tributary must be close. The plurality refers to that connection as a 
``continuous surface connection'' or ``continuous physical 
connection,'' as demonstrated in Riverside Bayview. Id. at 742, 751 
n.13. Justice Kennedy recognizes that ``the connection between a 
nonnavigable water or wetland and a navigable water may be so close, or 
potentially so close, that the Corps may deem the water or wetland a 
`navigable water' under the Act.'' Id. at 767. The second part of their 
common analytical framework is addressed in the next section.
b. Tributaries
    The definition of ``tributary'' was not addressed in either 
Riverside Bayview or SWANCC. And while the focus of Rapanos was on 
whether the Corps could regulate wetlands adjacent to nonnavigable 
tributaries far removed from navigable-in-fact waters, the plurality 
and concurring opinions do provide guidance as to the scope of CWA 
coverage of tributaries to navigable-in-fact waters.
    The plurality and Justice Kennedy both recognize that the 
jurisdictional scope of the CWA is not restricted to traditional 
navigable waters. Rapanos, 547 U.S. at 731 (Scalia, J., plurality) 
(``the Act's term `navigable waters' includes something more than

[[Page 56638]]

traditional navigable waters''); id. at 767 (Kennedy, J., concurring) 
(``Congress intended to regulate at least some waters that are not 
navigable in the traditional sense.''). Both also agree that federal 
authority under the Act does have limits. See id. at 731-32 
(plurality).
    With respect to tributaries specifically, both the plurality and 
Justice Kennedy focus in part on a tributary's contribution of flow to 
and connection with traditional navigable waters. The plurality would 
include as ``waters of the United States'' ``only relatively permanent, 
standing or flowing bodies of water'' and would define such ``waters'' 
as including streams, rivers, oceans, lakes and other bodies of waters 
that form geographical features, noting that all such ``terms connote 
continuously present, fixed bodies of water . . . .'' Id. at 732-33, 
739. The plurality would also require relatively permanent waters to be 
connected to traditional navigable waters in order to be 
jurisdictional. See id. at 742 (describing a ```wate[r] of the United 
States''' as ``i.e., a relatively permanent body of water connected to 
traditional interstate navigable waters'') (emphasis added). The 
plurality would exclude ephemeral flows and related features, stating 
``[n]one of these terms encompasses transitory puddles or ephemeral 
flows of water.'' Id. at 733; see also id. at 734 (``In applying the 
definition to `ephemeral streams,' . . . the Corps has stretched the 
term `waters of the United States' beyond parody. The plain language of 
the statute simply does not authorize this `Land Is Waters' approach to 
federal jurisdiction.''). Justice Kennedy would appear to exclude some 
streams considered jurisdictional under the plurality's test, but he 
may include some that would be excluded by the plurality. See id. at 
769 (noting that under the plurality's test, ``[t]he merest trickle, if 
continuous, would count as a `water' subject to federal regulation, 
while torrents thundering at irregular intervals through otherwise dry 
channels would not'').
    Both the plurality and Justice Kennedy would include some seasonal 
or intermittent streams as ``waters of the United States.'' Id. at 733 
& n.5, 769. The plurality noted, for example, that its reference to 
``relatively permanent'' waters did ``not necessarily exclude streams, 
rivers, or lakes that might dry up in extraordinary circumstances, such 
as drought,'' or ``seasonal rivers, which contain continuous flow 
during some months of the year but no flow during dry months . . . .'' 
Id. at 732 n.5 (emphasis in original). Neither the plurality nor 
Justice Kennedy, however, defined with precision where to draw the 
line. The plurality provides that ``navigable waters'' must have ``at a 
bare minimum, the ordinary presence of water,'' id. at 734, and Justice 
Kennedy notes that the Corps can identify by regulation categories of 
tributaries based on ``their volume of flow (either annually or on 
average), their proximity to navigable waters, or other relevant 
considerations'' that ``are significant enough that wetlands adjacent 
to them are likely, in the majority of cases, to perform important 
functions for an aquatic system incorporating navigable waters.'' Id. 
at 780-81.
    Both the plurality and Justice Kennedy also agreed that the Corps' 
existing treatment of tributaries raised significant jurisdictional 
concerns. For example, the plurality was concerned about the Corps' 
broad interpretation of tributaries themselves. See id. at 738 
(plurality) (``Even if the term `the waters of the United States' were 
ambiguous as applied to channels that sometimes host ephemeral flows of 
water (which it is not), we would expect a clearer statement from 
Congress to authorize an agency theory of jurisdiction that presses the 
envelope of constitutional validity.''). And Justice Kennedy objected 
to the categorical assertion of jurisdiction over wetlands adjacent to 
the Corps' existing standard for tributaries ``which seems to leave 
wide room for regulation of drains, ditches, and streams remote from 
any navigable-in-fact water and carrying only minor water volumes 
towards it . . . .'' Id. at 781 (Kennedy, J. concurring), see also id. 
at 781-82 (``[I]n many cases wetlands adjacent to tributaries covered 
by this standard might appear little more related to navigable-in-fact 
waters than were the isolated ponds held to fall beyond the Act's scope 
in SWANCC.'').
    Though some commenters agreed that aspects of the plurality's and 
Justice Kennedy's opinions align regarding the limits of federal 
jurisdiction under the CWA, other commenters disagreed that the 
opinions share important commonalities. These commenters asserted that 
the opinions have disparate rationales that cannot be reconciled. While 
the agencies acknowledge that the plurality and Justice Kennedy viewed 
the question of federal CWA jurisdiction differently, the agencies find 
that there are sufficient commonalities between these opinions to help 
instruct the agencies on where to draw the line between Federal and 
State waters.
3. Principles and Considerations
    As discussed in the previous section, a few important principles 
emerge that can serve as the basis for the agencies' conclusion that 
the agencies exceeded their authority when defining the scope of CWA 
jurisdiction under the 2015 Rule. As a threshold matter, the power 
conferred on the agencies under the CWA to regulate the ``waters of the 
United States'' is grounded in Congress' commerce power over 
navigation. The agencies can choose to regulate beyond waters more 
traditionally understood as navigable, including some tributaries to 
those traditional navigable waters, but must provide a reasonable basis 
grounded in the language and structure of the Act for determining the 
extent of jurisdiction. The agencies can also choose to regulate 
wetlands adjacent to the traditional navigable waters and some 
tributaries, if the wetlands are closely connected to the tributaries, 
such as in the transitional zone between open waters and dry land. The 
Supreme Court's opinion in SWANCC, however, calls into question the 
agencies' authority to regulate certain nonnavigable, isolated, 
intrastate waters that lack a sufficient connection to traditional 
navigable waters. This counsels that the agencies should avoid 
regulatory interpretations of the CWA that raise constitutional 
questions regarding the scope of their statutory authority. Finally, 
the agencies can regulate certain waters by category, which could 
improve regulatory predictability and certainty and ease administrative 
burden while still effectuating the purposes of the Act.
    The agencies also recognize and respect the primary 
responsibilities and rights of States to regulate their land and water 
resources. See 33 U.S.C. 1251(b), 1370. The oft-quoted objective of the 
CWA to ``restore and maintain the chemical, physical, and biological 
integrity of the Nation's waters,'' id. at 1251(a), must be implemented 
in a manner consistent with Congress' policy directives to the 
agencies. The Supreme Court long ago recognized the distinction between 
federal waters traditionally understood as navigable and waters 
``subject to the control of the States.'' The Daniel Ball, 77 U.S. (10 
Wall.) 557, 564-65 (1870). Over a century later, the Supreme Court in 
SWANCC reaffirmed the State's ``traditional and primary power over land 
and water use.'' 531 U.S. at 174; accord Rapanos, 547 U.S. at 738 
(Scalia, J., plurality opinion).
    Ensuring that States retain authority over their land and water 
resources pursuant to section 101(b) and section 510 helps carry out 
the overall objective of the CWA and ensures that the agencies are 
giving full effect and consideration to the entire structure and 
function of the Act. See, e.g., id. at 755-

[[Page 56639]]

56 (Scalia, J., plurality opinion) (``[C]lean water is not the only 
purpose of the statute. So is the preservation of primary state 
responsibility for ordinary land-use decisions. 33 U.S.C. 1251(b).'') 
(original emphasis). That includes the dozens of non-regulatory grant, 
research, nonpoint source, groundwater, and watershed planning programs 
that were intended by Congress to assist the States in controlling 
pollution in all of the nation's waters, not just its navigable waters. 
Controlling all waters using the Act's federal regulatory mechanisms 
would significantly reduce the need for the more holistic planning 
provisions of the Act and the State partnerships they entail. 
Therefore, by recognizing the distinctions between the nation's waters 
and the navigable waters and between the overall objective and goals of 
the CWA and the specific policy directives from Congress, the agencies 
can fully implement the entire structure of the Act while respecting 
the specific word choices of Congress. See, e.g., Bailey v. United 
States, 516 U.S. at 146; Nat'l Fed'n of Indep. Bus. v. Sebelius, 567 
U.S. at 544.
    Further, the agencies are cognizant that the ``Clean Water Act 
imposes substantial criminal and civil penalties for discharging any 
pollutant into waters covered by the Act without a permit . . . .'' 
U.S. Army Corps of Engineers v. Hawkes Co., 136 S. Ct. 1807, 1812 
(2016). As Justice Kennedy observed in 2016, ``the reach and systemic 
consequences of the Clean Water Act remain a cause for concern'' and 
``continues to raise troubling questions regarding the Government's 
power to cast doubt on the full use and enjoyment of private property 
throughout the Nation . . . .''). Id. at 1816-17 (Kennedy, J., 
concurring). The agencies recognize that the 2015 Rule and subsequent 
litigation challenging the legality of core components of that rule 
have added to the questions regarding the appropriate scope of the 
Federal government's regulatory power and power over private property, 
and that currently the scope of those powers varies based on State 
line.

C. Reasons for Repeal

    The agencies are repealing the 2015 Rule for four primary reasons. 
First, the agencies have concluded that the 2015 Rule misapplied 
Justice Kennedy's significant nexus standard despite identifying that 
standard as its touchstone. The 2015 Rule adopted an interpretation of 
the significant nexus standard that impermissibly expanded the scope of 
federal jurisdiction, resulting in the regulation of waters beyond what 
Congress intended. The rule did so by misapplying Justice Kennedy's 
standard to broaden the meaning and application of the terms 
``tributary,'' ``adjacent,'' and ``significant nexus'' while 
reinterpreting the phrase ``similarly situated lands in the region'' to 
support the potential assertion of federal regulation over nearly all 
waters within large watersheds. The agencies are repealing the 2015 
Rule because the agencies have now concluded that the 2015 Rule 
exceeded the legal limits on the scope of the agencies' jurisdiction 
under the CWA as intended by Congress and as reflected in Supreme Court 
cases, including Justice Kennedy's articulation of the significant 
nexus standard in Rapanos.\27\
---------------------------------------------------------------------------

    \27\ The agencies are not taking a position in this rulemaking 
regarding whether Justice Kennedy's concurring opinion in Rapanos is 
or should be the controlling authority regarding the scope of 
federal jurisdiction under the CWA. See, e.g., Rapanos, 547 U.S. at 
758 (Roberts, C.J., concurring). The agencies used Justice Kennedy's 
significant nexus standard as the touchstone for the 2015 Rule, and 
for the reasons described herein, the agencies are repealing the 
2015 Rule because it exceeded the scope of authority described in 
that standard. The agencies requested comment regarding whether 
Justice Kennedy's concurring opinion ``must be a mandatory component 
of any future definition of `waters of the United States' '' as part 
of the rulemaking on a proposed revised definition. See 84 FR 4154, 
4167, 4177 (Feb. 14, 2019).
---------------------------------------------------------------------------

    Second, the agencies have concluded that the 2015 Rule did not 
adequately consider and accord due weight to the express congressional 
policy in CWA section 101(b) to ``recognize, preserve, and protect the 
primary responsibilities and rights of States to prevent, reduce and 
eliminate pollution'' and ``to plan the development and use . . . of 
land and water resources.'' 33 U.S.C. 1251(b). The CWA balances 
preservation of the traditional power of States to regulate land and 
water resources within their borders with federal water quality 
regulation and oversight to protect the ``waters of the United 
States.'' The agencies now conclude that in promulgating the 2015 Rule, 
they did not accord due weight to that balance. The 2015 Rule expanded 
jurisdiction over the pre-existing regulatory regime in a manner that 
encroached on traditional State land-use regulation and the authority 
of States to regulate State waters, and it altered Federal, State, 
tribal, and local government relationships in implementing CWA programs 
without a clear statement from Congress. By repealing the 2015 Rule, 
the agencies are reversing that encroachment on State authority and 
restoring those pre-existing relationships.
    Third, given the errors in applying Justice Kennedy's significant 
nexus standard to assert an expanded theory of federal jurisdiction and 
the failure to adequately consider and accord due weight to the policy 
direction from Congress to respect the roles and responsibilities of 
the Federal government and States in implementing the full suite of 
regulatory and non-regulatory programs in the CWA, the agencies have 
concluded that the 2015 Rule, like the application of the Corps' 
regulations in SWANCC, ``raise[s] significant questions of Commerce 
Clause authority and encroach[es] on traditional state land-use 
regulation.'' Rapanos, 547 U.S. at 776 (Kennedy, J., concurring); see 
also Georgia v. Wheeler, No. 2:15-cv-079, 2019 WL 3949922, at *23 (S.D. 
Ga. Aug. 21, 2019) (finding the 2015 Rule ``unlawful'' given its 
``significant intrusion on traditional state authority'' without ``any 
clear or manifest statement to authorize intrusion into that 
traditional state power''). Given the absence of a ``clear indication'' 
that Congress intended to invoke the outer limits of its power, see 531 
U.S. at 172-73, the agencies are repealing the 2015 Rule to avoid 
interpretations of the CWA that push the envelope of their 
constitutional and statutory authority, consistent with principles of 
constitutional avoidance.
    Lastly, the agencies also recognize that the 2015 Rule has been 
remanded by the U.S. District Court for the Southern District of Texas 
for failing to comply with the APA. That court found that the distance-
based limitations in the final rule were not a logical outgrowth of the 
proposal in violation of the APA's public notice and comment 
requirements. See Texas v. EPA, No. 3:15-cv-162, 2019 WL 2272464 (S.D. 
Tex. May 28, 2019). The court found this error ``significant'' because 
the specific distance-based limitations ``alter[ed] the jurisdictional 
scope of the Act.'' Id. at *5. The agencies are also aware that 
litigants challenging the 2015 Rule alleged other APA deficiencies, 
including the lack of record support for the distance-based limitations 
inserted into the final rule without adequate notice. Several 
commenters on the proposed repeal of the 2015 Rule raised similar 
concerns, arguing that the 2015 Rule was arbitrary and capricious 
because of the lack of record support for those limitations. The 
agencies recognize that the Federal government, in prior briefing, has 
defended the procedural steps the agencies took to develop and support 
the 2015 Rule. Having considered the public comments and relevant 
litigation positions, and the decision of the Southern District of 
Texas on related arguments, the agencies now conclude that the

[[Page 56640]]

administrative record for the 2015 Rule did not contain sufficient 
record support for the distance-based limitations that appeared for the 
first time in the final rule. This conclusion is further supported by 
similar findings of the U.S. District Court for the Southern District 
of Georgia, which remanded the 2015 Rule to the agencies in August 2019 
after identifying substantive and procedural errors with respect to 
numerous provisions, including the rule's distance limitations. Georgia 
v. Wheeler, No. 2:15-cv-079, 2019 WL 3949922 (S.D. Ga. Aug. 21, 2019). 
By repealing the 2015 Rule for the reasons stated herein, the agencies 
are remedying the procedural defects underlying the 2015 Rule and 
responding to these court orders remanding the 2015 Rule.
    In reaching this decision, the agencies considered the public 
comments received in response to the NPRM and SNPRM. The agencies also 
carefully reviewed their statutory and constitutional authority, as 
well as court rulings interpreting the CWA and others arising from 
litigation challenging the 2015 Rule. Some courts issuing preliminary 
injunctions to stay implementation of the 2015 Rule have suggested that 
the agencies' interpretation of the ``significant nexus'' standard, as 
applied in the 2015 Rule, may not have implemented the limits of 
federal CWA jurisdiction reflected in decisions of the Supreme Court. 
See, e.g., North Dakota v. EPA, 127 F. Supp. 3d 1047, 1055-56 (D.N.D. 
2015). The agencies now agree with the rationale of those decisions as 
they appropriately recognize the limits of the agencies' authority 
under the CWA. Moreover, the agencies find that the court rulings 
issued thus far against the 2015 Rule corroborate the agencies' 
concerns regarding the scope and legal basis of the rule.
1. The 2015 Rule Misapplied and Inappropriately Expanded the 
Significant Nexus Standard
    When promulgating the 2015 Rule, the agencies did not properly 
apply Justice Kennedy's significant nexus standard as a limiting test 
in a manner that would avoid unreasonable applications of the CWA. 
Having reconsidered the relevant Supreme Court opinions, the agencies 
now conclude that the significant nexus standard is indeed a limiting 
test necessarily constraining overly broad applications of the statute. 
In Rapanos, Justice Kennedy concluded that the CWA covers only ``waters 
that are or were navigable in fact or that could reasonably be so 
made'' as well as waters with a ``significant nexus'' to navigable 
waters in the traditional sense. 547 U.S. at 779 (Kennedy, J., 
concurring). Specifically, Justice Kennedy found that ``wetlands 
possess the requisite nexus'' if they ``either alone or in combination 
with similarly situated lands in the region, significantly affect the 
chemical, physical, and biological integrity of'' navigable-in-fact 
waters. Id. at 780. In contrast, according to Justice Kennedy, the CWA 
does not regulate wetlands with ``speculative or insubstantial'' 
effects on the integrity of navigable waters. Id.
    In promulgating the 2015 Rule, the agencies sought to interpret 
``the scope of the `waters of the United States' for the CWA using the 
goals, objectives, and policies of the statute, the Supreme Court case 
law, the relevant and available science, and the agencies' technical 
expertise and experience as support.'' 80 FR 37056. In particular, the 
agencies focused on the significant nexus standard in defining the 
scope of CWA jurisdiction. Id. at 37060 (``The key to the agencies' 
interpretation of the CWA is the significant nexus standard, as 
established and refined in Supreme Court opinions.'').
    After careful review of the 2015 Rule and the public comments 
received in response to the notices proposing to repeal the 2015 Rule, 
the agencies now conclude that the rule misconstrued the significant 
nexus standard described by Justice Kennedy in Rapanos. Key provisions 
of the rule were at odds with Justice Kennedy's understanding of the 
phrase ``significant nexus'' because they permitted ``applications . . 
. that appeared likely . . . to raise constitutional difficulties and 
federalism concerns,'' 547 U.S. at 776 (Kennedy, J., concurring),\28\ 
including the categorical assertion of jurisdiction over certain 
wetlands and waters that ``lie alongside a ditch or drain, however 
remote and insubstantial.'' See id. at 778-79. The agencies' 
misapplication of the significant nexus standard also ran counter to 
principles articulated by the Supreme Court in SWANCC, as the 2015 Rule 
permitted federal jurisdiction over certain nonnavigable, isolated, 
intrastate waters similar to the ponds and mudflats that ``raise[d] 
significant constitutional questions'' in that case. 531 U.S. at 173-
74; see also Georgia v. Wheeler, No. 2:15-cv-079, 2019 WL 3949922, at 
*23 (S.D. Ga. Aug. 21, 2019). The agencies' misapplication of the 
significant nexus standard in the 2015 Rule also resulted in a 
definition of ``waters of the United States'' that did not give 
sufficient effect to the word ``navigable'' within the phrase 
``navigable waters'' in a manner consistent with Supreme Court 
precedent. Ultimately, the fundamental and systemic broad 
interpretation and misapplication of the significant nexus standard in 
the 2015 Rule resulted in a ``close-to-the-edge expansion of [the 
agencies'] own powers'' with a ``theory of jurisdiction that presse[d] 
the envelope of constitutional validity.'' 547 U.S. at 738, 756 
(Scalia, J., plurality). For these reasons, described in detail below, 
the agencies misconstrued the limits of the CWA and are repealing the 
2015 Rule.
---------------------------------------------------------------------------

    \28\ Although not central to the agencies' decision to repeal 
the 2015 Rule, the agencies also conclude that the 2015 Rule's 
regulatory definition of ``significant nexus'' was incompatible with 
the Rapanos plurality's interpretation of ``significant nexus.'' See 
547 U.S. at 755 (Scalia, J., plurality) (``Our interpretation of the 
phrase [`significant nexus'] is both consistent with [Riverside 
Bayview and SWANCC] and compatible with what the Act does establish 
as the jurisdictional criterion: `waters of the United States.' 
Wetlands are `waters of the United States' if they bear the 
`significant nexus' of physical connection, which makes them as a 
practical matter indistinguishable from waters of the United States. 
What other nexus could conceivably cause them to be `waters of the 
United States'?'' (original emphasis)).
---------------------------------------------------------------------------

a. The 2015 Rule Failed to Properly Consider and Adopt the Limits of 
the ``Significant Nexus'' Standard as First Established in SWANCC
    The phrase ``significant nexus'' first appeared in SWANCC wherein 
Chief Justice Rehnquist, joined by Justice Kennedy and other Justices, 
described the holding of the Court in Riverside Bayview: ``It was the 
significant nexus between the wetlands and `navigable waters' that 
informed our reading of the CWA in Riverside Bayview Homes.'' 531 U.S. 
at 167. While the Riverside Bayview Court did not ``express any 
opinion'' on the ``question of the authority of the Corps to regulate 
discharges of fill material into wetlands that are not adjacent to 
bodies of open water,'' 474 U.S. at 131-32 n.8, the SWANCC Court 
``conclude[d] that the text of the statute will not allow'' 
jurisdiction of the Corps to ``extend[ ] to ponds that are not adjacent 
to open water.'' 531 U.S. at 168.
    In describing the significant nexus standard in Rapanos, Justice 
Kennedy recognized that ``in some instances, as exemplified by 
Riverside Bayview, the connection between a nonnavigable water or 
wetland and a navigable water may be so close, or potentially so close, 
that the Corps may deem the water or wetland a `navigable water' under 
the Act. In other instances, as exemplified by SWANCC, there may be 
little or no connection.'' 547 U.S. at 767 (Kennedy, J., concurring). 
Justice Kennedy

[[Page 56641]]

explained his interpretation of the meaning and import of SWANCC: 
``Because such a [significant] nexus was lacking with respect to 
isolated ponds, the Court held that the plain text of the statute did 
not permit'' the Corps to assert jurisdiction over the isolated ponds 
and mudflats at issue in SWANCC. Id.; see also id. at 774 (describing 
``SWANCC's holding'' to mean that ```nonnavigable, isolated, intrastate 
waters,' are not `navigable waters.' '' (quoting SWANCC, 531 U.S. at 
171)); id. at 781-82 (``[I]n many cases wetlands adjacent to 
tributaries covered by [the Corps' existing tributary] standard might 
appear little more related to navigable-in-fact waters than were the 
isolated ponds held to fall beyond the Act's scope in SWANCC.''). The 
Rapanos plurality recognized the same jurisdictional limits articulated 
in SWANCC. See 547 U.S. at 726 (``Observing that `[i]t was the 
significant nexus between the wetlands and `navigable waters' that 
informed our reading of the CWA in Riverside Bayview,' we held that 
Riverside Bayview did not establish `that the jurisdiction of the Corps 
extends to ponds that are not adjacent to open water.' '' (citations 
and emphasis omitted)). And Justice Stevens, writing for four Justices 
in dissent in Rapanos, also recognized this principle. See id. at 795 
(Stevens, J., dissenting) (``The Court [in SWANCC] rejected [the Corps' 
exercise of jurisdiction] since these isolated pools, unlike the 
wetlands at issue in Riverside Bayview, had no `significant nexus' to 
traditionally navigable waters.''); id. at 796 (Stevens, J., 
dissenting) (``[T]he Corps has reasonably interpreted its jurisdiction 
to cover nonisolated wetlands.'' (emphasis added)).
    In the SNPRM, the agencies specifically requested comment and 
additional information on ``whether the water features at issue in 
SWANCC or other similar water features could be deemed jurisdictional 
under the 2015 Rule,'' and whether such a determination would be 
``consistent with or otherwise well-within the agencies' statutory 
authority.'' 83 FR 32249. The agencies now conclude that in formulating 
the significant nexus test in the 2015 Rule, the agencies failed to 
properly consider or adopt the limits of the significant nexus standard 
established in SWANCC--the very case in which the phrase ``significant 
nexus'' originated--and Justice Kennedy's opinion in Rapanos. The 
preamble to the 2015 Rule stated that ``[t]he agencies utilize[d] the 
significant nexus standard, as articulated by Justice Kennedy's opinion 
[in Rapanos] and informed by the unanimous opinion in Riverside Bayview 
and the plurality opinion in Rapanos.'' 80 FR 37061. But the rule did 
not properly consider the limits of the significant nexus standard as 
first described in SWANCC and subsequently relied upon by Justice 
Kennedy in Rapanos, nor was it adequately informed by the unanimous 
opinion in Riverside Bayview.
    For example, applying the 2015 Rule to the waters at issue in 
SWANCC demonstrates that the 2015 Rule did not comport with the limits 
of the CWA as interpreted in that decision. The ``seasonally ponded, 
abandoned gravel mining depressions'' at issue in SWANCC were within 
4,000 feet of Poplar Creek--a ``tributary'' under the 2015 Rule which 
leads to the Fox River and in turn flows into the Illinois and 
Mississippi Rivers. Based on this information, the SWANCC ponds and 
mudflats would have been subject to a case-specific significant nexus 
analysis under the 2015 Rule's (a)(8) provision. See 80 FR 37105.\29\ 
Considering the nine functions relevant to a significant nexus 
evaluation as defined in the 2015 Rule, including ``runoff storage'' 
and ``sediment trapping,'' id. at 37067, as well as the descriptions of 
the site available to the agencies, the SWANCC ponds and mudflats would 
almost certainly have a ``significant nexus'' under the 2015 Rule 
because they could be found to retain ``stormwater volumes and 
associated sediment coming off the landfill'' that would otherwise 
reach a navigable water. See Brief of Dr. Gene Likens et al. as Amici 
Curiae in Support of Respondent at 6-28, SWANCC, 531 U.S. 159 (No. 99-
1178) [hereinafter Scientists' Brief] (quoting Decision Document A.R. 
15645-47); see also id. (``[The SWANCC site] holds enough water to fill 
the Pentagon four feet deep. . . . Absent strict controls, this water 
could easily end up directly or indirectly in the Fox River, . . . 
which in turn flows into the navigable Illinois and Mississippi 
Rivers.''); Rapanos, 547 U.S. at 749 (Scalia, J., plurality) (``[T]he 
ponds at issue in SWANCC could . . . offer nesting, spawning, rearing 
and resting sites for aquatic or land species, and serve as valuable 
storage areas for storm and flood waters[.]'' (internal quotation marks 
and citations omitted)). In fact, given this evidence, were the Corps 
not to find jurisdiction over the SWANCC ponds under the 2015 Rule's 
(a)(8) provision, the agencies are cognizant that the Corps could be 
subject to allegations that such a finding would be an arbitrary and 
capricious application of that provision. And yet, with this 
information before it,\30\ the majority of the SWANCC Court concluded 
that the nonnavigable, isolated, intrastate waters at issue in SWANCC 
fell beyond the scope of federal CWA jurisdiction. See SWANCC, 531 U.S. 
at 174 (``[W]e find nothing approaching a clear statement from Congress 
that it intended Sec.  404(a) to reach an abandoned sand and gravel pit 
such as we have here.'').
---------------------------------------------------------------------------

    \29\ The ``seasonally ponded, abandoned gravel mining 
depressions located on the [SWANCC] project site,'' 531 U.S. at 164, 
would not have been covered by the 2015 Rule's exclusion for water-
filled depressions created incidental to mining activity. See e.g., 
33 CFR 328.3(b)(4)(v). While the text of the 2015 Rule is not clear 
on this point, the earlier regulatory preambles that this exclusion 
is based on and the 2015 Rule Response to Comments (RTC) document 
confirm that this exclusion ceases to apply if the mining activities 
that created the waters are abandoned. See 53 FR 20764, 20765 (June 
6, 1988) (``we generally do not consider the following waters to be 
`waters of the United States' . . . [w]ater-filled depressions 
created in dry land incidental to construction activity and pits 
excavated in dry land for the purpose of obtaining fill, sand, or 
gravel unless and until the construction or excavation operation is 
abandoned and the resulting body of water meets the definition of 
waters of the United States'') (emphasis added); see also 2015 Rule 
RTC, Topic 7 at 209 (``The exclusion applies to pits excavated in 
dry land for obtaining fill, sand, or gravel. The rule does not 
change the agencies' existing practice that these features could be 
found to be jurisdictional once the construction or mining activity 
is completed or abandoned and the water feature remains.'').
    \30\ This information, along with other ecological functions of 
isolated waters, was submitted to the SWANCC Court in amicus briefs 
filed in support of the Corps by ecologists and several States. See 
Scientists' Brief; Brief of the States of California et al. as Amici 
Curiae in Support of Respondents, SWANCC, 531 U.S. 159 (No. 99-
1178). Additionally, in oral argument during SWANCC, U.S. Deputy 
Solicitor General Wallace stated, ``The waters here . . . serve as 
storage for what would otherwise be flood waters during periods of 
heavy rain that would cause overflow. That was part of what the 
Corps had to deal with in dealing with this [permit] application.'' 
Transcript of Oral Argument at 39, Solid Waste Agency of Northern 
Cook County v. U.S. Army Corps of Engineers, 531 U.S. 159 (2001) 
(No. 99-1187).
---------------------------------------------------------------------------

    The agencies have solicited comment on the proper scope and 
interpretation of the SWANCC decision as part of their effort to 
propose a revised definition of ``waters of the United States'' 
pursuant to Executive Order 13778. See 84 FR 4165. In that proposal, 
the agencies noted that the Federal government historically has applied 
a more narrow reading of SWANCC when determining jurisdiction over 
individual water features,\31\ while simultaneously

[[Page 56642]]

applying a broader reading of Justice Kennedy's concurring opinion in 
Rapanos. Id. at 4167, 4177. While the agencies consider comments as to 
the appropriateness of that dichotomy as part of their separate 
rulemaking, the agencies continue to agree with their express statement 
in the 2008 Rapanos Guidance regarding the jurisdictional limitations 
articulated in SWANCC as interpreted by Justice Kennedy:
---------------------------------------------------------------------------

    \31\ But see Transcript of Oral Argument at 41, Rapanos v. 
United States and Carabell v. United States, 547 U.S. 715 (2006) 
(Nos. 04-1034, 04-1384) where U.S. Solicitor General Clement stated 
that after SWANCC ``the Corps and the EPA's view of wetlands would 
cover about 80 percent of the wetlands in the country. And that 
shows that the impact of this Court's decision in SWANCC was real 
and substantial because about 20 percent of the Nation's wetlands 
are isolated.'' (emphasis added).

    When applying the significant nexus standard to tributaries and 
wetlands, it is important to apply it within the limits of 
jurisdiction articulated in SWANCC. Justice Kennedy cites SWANCC 
with approval and asserts that the significant nexus standard, 
rather than being articulated for the first time in Rapanos, was 
established in SWANCC. 126 S. Ct. at 2246 (describing SWANCC as 
``interpreting the Act to require a significant nexus with navigable 
waters''). It is clear, therefore, that Justice Kennedy did not 
intend for the significant nexus standard to be applied in a manner 
that would result in assertion of jurisdiction over waters that he 
and the other justices determined were not jurisdictional in SWANCC. 
Nothing in this guidance should be interpreted as providing 
authority to assert jurisdiction over waters deemed non-
---------------------------------------------------------------------------
jurisdictional by SWANCC.

2008 Rapanos Guidance at 9 n.32.\32\ The agencies continue to utilize 
the 2008 Rapanos Guidance in those States where the pre-2015 
regulations are in place, and upon reconsideration reiterate and agree 
``that Justice Kennedy did not intend for the significant nexus 
standard to be applied in a manner that would result in assertion of 
jurisdiction over waters that he and the other justices determined were 
not jurisdictional in SWANCC.'' Id.
---------------------------------------------------------------------------

    \32\ The agencies also recognize that Justice Stevens 
interpreted the SWANCC majority opinion to apply beyond the 
Migratory Bird Rule and the specific ponds at issue in SWANCC, 
stating the decision ``invalidates the 1986 migratory bird 
regulation as well as the Corps' assertion of jurisdiction over all 
waters except for actually navigable waters, their tributaries, and 
wetlands adjacent to each.'' 531 U.S. at 176-77 (Stevens, J., 
dissenting) (emphasis added).
---------------------------------------------------------------------------

    In the 2015 Rule, and in particular the (a)(8) provision, the 
agencies reinterpreted their understanding of the limits of 
jurisdiction set by Justice Kennedy's significant nexus test as 
described in the 2008 Rapanos Guidance. Thus, under the 2015 Rule's 
(a)(8) category for waters subject to case-specific significant nexus 
analyses, the 2015 Rule could have swept ``ponds that are not adjacent 
to open water,'' 531 U.S. at 168, along with other non-adjacent waters 
and wetlands into the scope of federal jurisdiction under the CWA. It 
did so by applying the nine functions described at 80 FR 37067, only 
one of which--provided its effect on the nearest primary water, either 
alone or in combination with other similarly situated waters in the 
watershed, was more than speculative or insubstantial--was necessary to 
subject a non-adjacent water or wetland to federal jurisdiction under 
the 2015 Rule. See id. at 37091. Under this formulation of the 
significant nexus standard, the very ponds at issue in SWANCC would be 
subject to federal review under the (a)(8) category of the 2015 Rule, 
and, as described above, would almost certainly be found to have a 
significant nexus under the 2015 Rule.
    Some commenters identified a narrow interpretation of SWANCC that 
they suggested would not conflict with the 2015 Rule's (a)(8) category 
of jurisdictional waters: While the SWANCC ponds may not be 
jurisdictional based on the use of those waters as habitat for 
migratory birds, they could be jurisdictional nonetheless if they 
satisfy one of the functions listed at 80 FR 37067 (e.g., sediment 
trapping, runoff storage). Similarly, noting that Justice Kennedy had 
characterized the SWANCC ponds as ``bearing no evident connection to 
navigable-in-fact waters,'' some commenters suggested that it would be 
appropriate to assert federal jurisdiction over the SWANCC ponds if the 
agencies established that such features satisfy the significant nexus 
test and thus have an ``evident connection'' to downstream navigable 
waters. Other commenters asserted that finding the SWANCC ponds 
jurisdictional under the 2015 Rule would be inconsistent with Justice 
Kennedy's understanding of the scope of federal jurisdiction under the 
Act.
    As noted above, the agencies believe that Justice Kennedy did not 
intend for the significant nexus standard to be applied in a manner 
that would result in the assertion of jurisdiction over waters that he 
and the other justices determined were not jurisdictional in SWANCC. 
The text of SWANCC supports this interpretation. The SWANCC majority 
specifically concluded that the ``text of the statute will not allow'' 
the assertion of CWA jurisdiction over the ponds at issue in that case. 
531 U.S. at 168. Thus, the agencies could not develop a formulation of 
a case-specific significant nexus test that the Supreme Court 
specifically rejected.\33\
---------------------------------------------------------------------------

    \33\ These same defects apply to the 2015 Rule's (a)(7) 
category. The preamble to the 2015 Rule stated, ``a water [or 
wetland] that does not meet the definition of `adjacent waters' may 
be determined to be a `water of the United States' on a case-
specific basis under paragraph (a)(8) of the rule,'' 80 FR 37080, 
and the 2015 Rule subjected (a)(7) waters to the same case-specific 
significant nexus analysis that it applied to (a)(8) waters, only 
without the distance-based limitations used in the (a)(8) category. 
See id. (``[W]aters may be determined to have a significant nexus on 
a case-specific basis under paragraph (a)(7) or (a)(8).'') (emphasis 
added).
---------------------------------------------------------------------------

    For these reasons, the agencies now find that the 2015 Rule 
departed from and conflicted with the agencies' prior interpretation of 
SWANCC without adequate notice and a reasoned explanation for the 
change in interpretation. See FCC v. Fox Television Stations, Inc., 556 
U.S. 502, 515-16 (2009) (``Fox''). In promulgating the 2015 Rule, the 
agencies acknowledged potential differences between their legal 
interpretations underlying the rule and the 2008 Rapanos Guidance. See, 
e.g., Technical Support Document for the Clean Water Rule: Definition 
of Waters of the United States at 79-83. The agencies failed to 
identify or acknowledge, however, that the 2015 Rule could regulate 
that which the Supreme Court rejected in SWANCC, a clear departure from 
their opposite position in the 2008 Rapanos Guidance. In this regard, 
the agencies recognize that their reinterpretation of Rapanos, SWANCC, 
and Justice Kennedy's significant nexus test was inconsistent with 
those cases.
    After reconsidering this issue, the agencies conclude that they 
lack statutory authority to promulgate a rule that would result in 
assertion of jurisdiction over waters that the Supreme Court determined 
were not jurisdictional in SWANCC, and that Justice Kennedy did not 
intend for the significant nexus standard he articulated in Rapanos to 
be applied in such a manner. In finalizing the 2015 Rule, the agencies 
therefore improperly departed from their prior position regarding this 
key element of the 2008 Rapanos Guidance.
    In returning to an interpretation of Justice Kennedy's decision 
that comports with the 2008 Rapanos Guidance, the agencies recognize 
the SWANCC Court's admonition to avoid constructions of the statute 
that raise significant constitutional questions related to the scope of 
federal authority authorized therein. 531 U.S. at 174; see also Section 
III.C.3, infra. By interpreting Justice Kennedy's significant nexus 
standard to regulate the very same or similar waters the Supreme Court 
ruled the text of the statute would not allow, the agencies pushed the 
boundaries of statutory interpretation. The 2015 Rule also raised 
questions regarding whether there is any meaning to the limits of

[[Page 56643]]

jurisdiction articulated by a unanimous Supreme Court in Riverside 
Bayview, which found that ``[i]n determining the limits of [their] 
power to regulate discharges under the Act,'' the agencies ``must 
necessarily choose some point at which water ends and land begins.'' 
474 U.S. at 132 (``[B]etween open waters and dry land may lie shallows, 
marshes, mudflats, swamps, bogs--in short, a huge array of areas that 
are not wholly aquatic but nevertheless fall far short of being dry 
land. Where on this continuum to find the limit of `waters' is far from 
obvious.''). By allowing federal jurisdiction to reach certain isolated 
ponds, such as those at issue in SWANCC, and certain physically remote 
wetlands that ``do not implicate the boundary-drawing problem of 
Riverside Bayview,'' the 2015 Rule asserted federal control over some 
features that ``lack the necessary connection to covered waters . . . 
described as a `significant nexus' in SWANCC[.]'' 547 U.S. at 742 
(Scalia, J., plurality); \34\ see also Hawkes, 136 S. Ct. at 1817 
(Kennedy, J., concurring) (``[T]he reach and systemic consequences of 
the Clean Water Act remain a cause for concern.'' (emphasis added)).
---------------------------------------------------------------------------

    \34\ While the agencies acknowledged being informed by the 
Rapanos plurality in developing the 2015 Rule, see 80 FR 37061, the 
regulation of non-adjacent waters as jurisdictional via the (a)(7) 
and (a)(8) categories is inconsistent with that opinion. See 
Rapanos, 547 U.S. at 742 (Scalia, J., plurality) (``[O]nly those 
wetlands with a continuous surface connection to bodies that are 
`waters of the United States' in their own right, so that there is 
no clear demarcation between `waters' and wetlands, are `adjacent 
to' such waters and covered by the Act.'' (emphasis omitted)); see 
also id. at 748 (``If isolated permanent and seasonal ponds of 
varying size and depth, which, after all, might at least be 
described as `waters' in their own right--did not constitute `waters 
of the United States,' a fortiori, isolated swampy lands do not 
constitute `waters of the United States.' '') (original emphasis) 
(internal quotation marks and citations omitted).
---------------------------------------------------------------------------

    Given the 2015 Rule permitted federal jurisdiction over certain 
physically disconnected waters and wetlands like those at issue in 
SWANCC--either categorically as ``adjacent'' waters or on a case-
specific basis according to an expanded significant nexus test--the 
agencies now conclude for this and other reasons that the 2015 Rule 
exceeded the agencies' statutory authority as interpreted in SWANCC and 
Justice Kennedy's concurrence in Rapanos. The agencies may not exceed 
the authority of the statutes they are charged with administering, see 
5 U.S.C. 706(2)(C) (prohibiting agency actions ``in excess of statutory 
jurisdiction, authority, or limitations''), and must avoid 
interpretations of the statutes they administer that push 
constitutional boundaries. See Section III.C.3, supra. In contrast to 
the 2008 Rapanos Guidance, the 2015 Rule failed to respect the limits 
of the significant nexus standard established in SWANCC and the 
foundation for Justice Kennedy's significant nexus standard in Rapanos. 
For these reasons, the agencies repeal the 2015 Rule.
b. The 2015 Rule's Interpretation and Application of the Significant 
Nexus Standard Did Not Respect the Limits of Federal Jurisdiction 
Reflected in Justice Kennedy's Opinion in Rapanos
    In the SNPRM, the agencies ``propose[d] to conclude that the 2015 
Rule exceeded the agencies' authority under the CWA'' by adopting an 
``expansive'' interpretation of Justice Kennedy's significant nexus 
standard that was ``inconsistent with important aspects of that 
opinion'' and resulted in a rule that ``cover[ed] waters outside the 
scope of the Act.'' 83 FR 32228, 32240. The agencies have considered 
the many comments received discussing these issues and now conclude 
that, in contrast to the limiting nature of the significant nexus 
standard first described in SWANCC and elaborated on by Justice Kennedy 
in Rapanos, the agencies' interpretation of the significant nexus 
standard in the 2015 Rule was overly expansive and did not comport with 
or respect the limits of jurisdiction reflected in the CWA and 
decisions of the Supreme Court.
    The agencies' broader interpretation of the significant nexus 
standard served as a fundamental basis of the 2015 Rule and informed 
the development of the definitions of the categorically jurisdictional 
and case-specific waters under the rule. See 80 FR 37060 (``The key to 
the agencies' interpretation of the CWA is the significant nexus 
standard, as established and refined in Supreme Court opinions.''). In 
applying this broad standard, the agencies established an expansive 
definition of jurisdictional ``tributaries,'' which in turn provided 
for per se jurisdictional ``adjacent'' (including ``neighboring'') 
waters and wetlands within specific distance and geographic limits of 
those tributaries and from which even farther-reaching case-specific 
significant nexus analyses could be conducted for isolated waters and 
wetlands not already meeting the broad jurisdictional-by-rule 
definitions. The result was a compounding of errors that subjected the 
vast majority of water features in the United States to the 
jurisdictional purview of the Federal government.\35\ This outcome is 
incompatible with the significant nexus standard and the limits of 
jurisdiction described in SWANCC and by Justice Kennedy in Rapanos.
---------------------------------------------------------------------------

    \35\ The agencies noted in 2015 ``that the vast majority of the 
nation's water features are located within 4,000 feet of a covered 
tributary, traditional navigable water, interstate water, or 
territorial sea.'' 2015 Rule Economic Analysis at 11.
---------------------------------------------------------------------------

    To be sure, the agencies enjoy discretion in setting the 
jurisdictional limits of the Act. See Rapanos, 547 U.S. at 758 
(Roberts, C.J., concurring); but see id. at 757 (noting that the Corps' 
``boundless view'' of its authority in SWANCC ``was inconsistent with 
the limiting terms Congress had used in the Act''). However, that 
discretion is not unbridled. It must remain within the confines of the 
Act's text and the Supreme Court's interpretations of the outer bounds 
of jurisdiction. The agencies exercised this discretion in an 
impermissible manner in 2015 by codifying a regulatory test for 
jurisdiction that exceeded the agencies' authority under the Act. 
Whereas ``the significant-nexus test itself prevents problematic 
applications of the statute,'' 547 U.S. at 783 (Kennedy, J., 
concurring) (emphasis added), the 2015 Rule misapplied the standard to 
create them.
i. The 2015 Rule's Definition of ``Significant Nexus'' Was Inconsistent 
With the Limiting Nature of Justice Kennedy's Significant Nexus 
Standard
    In Rapanos, Justice Kennedy found that adjacent ``wetlands possess 
the requisite nexus, and thus come within the statutory phrase 
`navigable waters,' if the wetlands, either alone or in combination 
with similarly situated lands in the region, significantly affect the 
chemical, physical, and biological integrity of other covered waters 
more readily understood as `navigable.' '' Id. at 780 (Kennedy, J., 
concurring). Justice Kennedy articulated this significant nexus 
standard to limit federal jurisdiction under the CWA to avoid 
``problematic'' or ``unreasonable'' applications of the statute arising 
from the breadth of the Corps' then-existing standard for tributaries. 
See id. at 783, 782. Pursuant to Justice Kennedy's opinion, if a water 
lacks a ``significant nexus,'' it is not jurisdictional under the Act. 
See id. at 767.
    After reviewing the public comments received on this rulemaking, 
the agencies conclude that the 2015 Rule's definition of ``significant 
nexus'' was inconsistent with the limiting nature of Justice Kennedy's 
significant nexus standard, resulting in a definition of ``waters of 
the United States'' that exceeded the scope of federal jurisdiction 
under the Act. In particular, the agencies now find that the 2015

[[Page 56644]]

Rule's interpretation of the phrase ``similarly situated lands in the 
region'' contravened the limiting principles inherent in Justice 
Kennedy's articulation of the significant nexus test. The significant 
change in the agencies' understanding of the meaning of Justice 
Kennedy's opinion and reasons for reinterpreting it was not explained 
and led to a compounding of errors in the agencies' misapplication of 
the significant nexus test.
    Justice Kennedy did not expressly define the phrase ``similarly 
situated lands in the region.'' His opinion, nevertheless, provides 
indications of the intended meaning of this phrase. The agencies 
expressed their understanding of this phrase in the 2008 Rapanos 
Guidance (at 8), stating that the phrase includes a tributary and all 
wetlands adjacent to that tributary. The guidance describes a 
``tributary'' as ``the entire reach of the stream that is of the same 
order (i.e., from the point of confluence, where two lower order 
streams meet to form the tributary, downstream to the point such 
tributary enters a higher order stream).'' Id. at 10. Thus, under the 
agencies' 2008 guidance:

    [W]here evaluating significant nexus for an adjacent wetland, 
the agencies will consider the flow characteristics and functions 
performed by the tributary to which the wetland is adjacent along 
with the functions performed by the wetland and all other wetlands 
adjacent to that tributary. This approach reflects the agencies' 
interpretation of Justice Kennedy's term ``similarly situated'' to 
include all wetlands adjacent to the same tributary. . . . 
Interpreting the phrase ``similarly situated'' to include all 
wetlands adjacent to the same tributary is reasonable because such 
wetlands are physically located in a like manner (i.e., lying 
adjacent to the same tributary).

Id.
    In the 2015 Rule, the agencies reinterpreted the phrase ``similarly 
situated lands in the region'' by defining ``(1) which waters are 
`similarly situated,' and thus should be analyzed in combination, in 
(2) the `region,' for purposes of a significant nexus analysis.'' 80 FR 
37065. This approach departed from the agencies' interpretation in the 
2008 Rapanos Guidance by splitting the phrase into two separate, 
expansive concepts (``similarly situated'' and ``in the region''). The 
agencies considered waters to be ``similarly situated'' in the 2015 
Rule when they ``function alike and are sufficiently close to function 
together in affecting downstream waters.'' 80 FR 37106. The preamble of 
the 2015 Rule further explained the concept of ``sufficiently close'':

    Similarly situated waters can be identified as sufficiently 
close together for purposes of this paragraph of the regulation when 
they are within a contiguous area of land with relatively 
homogeneous soils, vegetation, and landform (e.g., plain, mountain, 
valley, etc.). In general, it would be inappropriate, for example, 
to consider waters as ``similarly situated'' under paragraph (a)(8) 
if these waters are located in different landforms, have different 
elevation profiles, or have different soil and vegetation 
characteristics, unless the waters perform similar functions and are 
located sufficiently close to a ``water of the United States'' to 
allow them to consistently and collectively function together to 
affect a traditional navigable water, interstate water, or the 
territorial seas. In determining whether waters under paragraph 
(a)(8) are sufficiently close to each other the agencies will also 
consider hydrologic connectivity to each other or a jurisdictional 
water.

80 FR 37092 (emphasis added). The 2015 Rule preamble also established 
that ``under paragraph (a)(8), waters do not need to be of the same 
type (as they do in paragraph (a)(7)) to be considered similarly 
situated. As described above, waters are similarly situated under 
paragraph (a)(8) where they perform similar functions or are located 
sufficiently close to each other, regardless of type.'' Id. (emphasis 
added). The agencies explained that this interpretation was based in 
part on ``one of the main conclusions of the [Connectivity Report] . . 
. that the incremental contributions of individual streams and wetlands 
are cumulative across entire watersheds, and their effects on 
downstream waters should be evaluated within the context of other 
streams and wetlands in that watershed.'' Id. at 37066. The agencies 
then defined ``in the region'' within the 2015 Rule's regulatory 
definition of ``significant nexus'' to mean ``the watershed that drains 
to the nearest'' primary water (i.e., categories (a)(1)-(3)).\36\
---------------------------------------------------------------------------

    \36\ The preamble of the 2015 Rule, however, created an 
exception for the codified definition of ``in the region'' in the 
Arid West in ``situations where the single point of entry watershed 
is very large.'' See 80 FR 37092 (``[In those situations] it may be 
reasonable to evaluate all similarly situated waters in a smaller 
watershed. Under those circumstances, the agencies may demarcate 
adjoining catchments surrounding the water to be evaluated that, 
together, are generally no smaller than a typical 10-digit 
hydrologic unit code (HUC-10) watershed in the same area. The area 
identified by this combination of catchments would be the `region' 
used for conducting a significant nexus evaluation under paragraphs 
(a)(7) or (a)(8) under those situations. The basis for such an 
approach in very large single point of entry watersheds in the arid 
West should be documented in the jurisdictional determination.''). 
The agencies now conclude that this exception, included in the final 
rule preamble without adequate notice, was at odds with the 
regulatory text of the 2015 Rule and created further confusion as to 
the application of the 2015 Rule's ``significant nexus'' test and 
the scope of aggregation for purposes of a significant nexus inquiry 
under the rule.
---------------------------------------------------------------------------

    The agencies acknowledged this change in position from the 2008 
Rapanos Guidance by explaining: ``The functions of the contributing 
waters are inextricably linked and have a cumulative effect on the 
integrity of the downstream traditional navigable water, interstate 
water, or the territorial sea. For these reasons, it is more 
appropriate to conduct a significant nexus analysis at the watershed 
scale than to focus on a specific site, such as an individual stream 
segment.'' Id. at 37066. As expressed in the 2008 Rapanos Guidance, the 
agencies previously understood the phrase ``similarly situated lands in 
the region'' to include all wetlands adjacent to the same tributary. 
The 2008 Rapanos Guidance states that ``[a] tributary . . . is the 
entire reach of the stream that is of the same order[.]'' 2008 Rapanos 
Guidance at 10.
    The 2015 Rule also departed from the 2008 Rapanos Guidance by 
applying the concept of ``similarly situated lands in the region'' to 
other waters, not only wetlands, across the entire watershed of the 
nearest primary water. See id. at 37066 (``A single point of entry 
watershed is the drainage basin within whose boundaries all 
precipitation ultimately flows to the nearest single traditional 
navigable water, interstate water, or the territorial sea. . . . The 
watershed includes all streams, wetlands, lakes, and open waters within 
its boundaries.''). In essence, the agencies determined that not only 
do ``wetlands possess the requisite nexus . . . if the wetlands, either 
alone or in combination with similarly situated lands in the region, 
significantly affect the chemical, physical, and biological integrity 
of other covered waters more readily understood as `navigable,' '' 547 
U.S. at 780 (Kennedy, J., concurring) (emphasis added), but also 
``[tributaries] possess the requisite nexus, and thus come within the 
statutory phrase `navigable waters,' if the [tributaries], either alone 
or in combination with similarly situated [tributaries] in the region, 
significantly affect the chemical, physical, and biological integrity 
of other covered waters more readily understood as `navigable.' '' 80 
FR 37068 (``[W]aters meeting the definition of `tributary' in a single 
point of entry watershed are similarly situated and have a significant 
nexus because they significantly affect the chemical, physical, or 
biological integrity of traditional navigable waters, interstate 
waters, and the territorial seas.'').

[[Page 56645]]

    As a result of the agencies' reinterpretation of a Supreme Court 
Justice's opinion referencing ``similarly situated lands in the 
region,'' the 2015 Rule broadened the scope of aggregation for 
determining jurisdiction in a ``significant nexus'' analysis relative 
to the 2008 Rapanos Guidance, which more closely aligned with what 
Justice Kennedy intended for that test. In the SNPRM, the agencies 
solicited comment on whether the 2015 Rule's approach to the phrase 
``similarly situated lands in the region'' relied on the scientific 
literature ``without due regard for the restraints imposed by the 
statute and case law.'' 83 FR 32240. Multiple commenters expressed 
concern that the 2015 Rule's interpretation of the phrase was 
inconsistent with Justice Kennedy's opinion. In particular, these 
commenters suggested that the 2015 Rule's approach of aggregating the 
contributions of all streams or all wetlands within an entire watershed 
impermissibly lowered the bar for establishing a significant nexus. 
Other commenters asserted that the 2015 Rule's approach was consistent 
with Justice Kennedy's opinion because the agencies found, in reliance 
on the Connectivity Report, that waters aggregated at a watershed scale 
have a connection to and impact downstream traditional navigable 
waters.
    The agencies now conclude that applying Justice Kennedy's concept 
of ``similarly situated lands in the region'' to encompass all 
``tributaries'' as broadly defined in the 2015 Rule and potentially all 
wetlands in a single point of entry watershed of the nearest primary 
water resulted in a regulatory definition that expanded federal 
jurisdiction to cover waters outside the scope of the Act, and thus 
exceeded the agencies' statutory authority. The agencies' analytical 
failure occurred in the first instance in the transition between the 
proposed and final versions of the 2015 Rule. For example, potential 
inclusion of all of the wetlands or waters in the watershed of the 
nearest primary water under the final 2015 Rule significantly expanded 
the scope of aggregation that determined jurisdiction in a 
``significant nexus'' analysis from the focus in the proposed rule on 
waters ``located sufficiently close together or sufficiently close to a 
`water of the United States' so that they can be evaluated as a single 
landscape unit.'' 79 FR 22263. The proposed rule adhered more closely 
to the agencies' position on aggregation in the 2008 Rapanos Guidance 
in that wetlands adjacent to the same tributary reach are inherently 
located closer together and closer to a ``water of the United States'' 
than are all non-adjacent wetlands across an entire single point of 
entry watershed. But in finalizing the 2015 Rule, the agencies viewed 
the scientific literature through a broader lens relative to the 
proposed rule. See, e.g., 80 FR 37094. This broader lens, as discussed 
in the following subsections, resulted in the per se regulation of a 
more expansive class of (a)(5) ``tributaries,'' including categorical 
jurisdiction over ephemeral ``tributaries,'' the per se regulation of a 
broader range of waters (not just wetlands) considered ``adjacent'' 
under the (a)(6) category, and case-specific inclusion of waters (not 
just wetlands) that are not ``adjacent'' to other waters but 
nonetheless could be regulated as ``waters of the United States'' 
according to the rule's (a)(7) and (a)(8) categories.
    The agencies adopted this broader aggregation approach without 
proper analysis of whether this approach was consistent with the 
statutory limits in the CWA's text and the limits included in Justice 
Kennedy's opinion in Rapanos. As explained in Section III.B, Justice 
Kennedy articulated the significant nexus standard to limit federal 
jurisdiction under the CWA to avoid ``unreasonable'' assertions of 
jurisdiction arising from the breadth of the Corps' then-existing 
standard for tributaries. As evidenced by the discussion in his 
concurrence, Justice Kennedy intended his significant nexus standard to 
be a limiting test, cabining the potential overreach of federal CWA 
jurisdiction. The agencies now believe that interpreting ``similarly 
situated lands in the region'' to encompass all ``tributaries'' as 
broadly defined in the 2015 Rule and potentially all wetlands in a 
``watershed that drains to the nearest'' primary water was inconsistent 
with the application of Justice Kennedy's significant nexus test as a 
limiting standard.
    For example, the agencies should have considered whether the 
aggregated landscape approach swept certain isolated ponds, such as 
those at issue in SWANCC, into federal jurisdiction. See Section 
III.C.1.a, supra. The SWANCC Court concluded that ``the text of the 
statute will not allow'' the Corps to regulate ``ponds that are not 
adjacent to open water.'' SWANCC, 531 U.S. at 168. And in Rapanos, 
Justice Kennedy even questioned the dissent's conclusion ``that the 
ambiguity in the phrase `navigable waters' allows the Corps to construe 
the statute as reaching all `non-isolated wetlands[.]' '' 547 U.S. at 
780 (emphasis added) (stating that this position ``seems incorrect''). 
Similarly, Justice Kennedy did not subscribe to the Rapanos dissent's 
position that ``would permit federal regulation whenever wetlands lie 
alongside a ditch or drain, however remote and insubstantial, that 
eventually may flow into traditional navigable waters.'' Id. at 778. 
``The deference owed to the Corps' interpretation of the statute,'' 
Justice Kennedy wrote, ``does not extend so far.'' Id. at 778-79.
    The 2015 Rule also permitted the agencies to find a ``significant 
nexus'' based on ``just one function,'' 80 FR 37068, such as 
``provision of life cycle dependent aquatic habitat'' for species found 
in primary waters. Id. at 37106. For an effect to be significant, the 
rule required that it must be more than speculative or insubstantial. 
Id. The rule allowed for jurisdiction when a water significantly 
affects ``aquatic habitats through wind- and animal-mediated 
dispersal'' of ``[a]nimals and other organisms,'' id. at 37072, 
including when ``[p]lants and invertebrates'' `` `hitchik[e]' on 
waterfowl'' ``to and from prairie potholes'' anywhere across an entire 
watershed. Connectivity Report at 5-5. Yet if, as the SWANCC Court 
held, the use of isolated ponds by migratory birds themselves was an 
insufficient basis upon which to establish jurisdiction, it cannot 
stand to reason that the seeds and critters clinging to their feathers 
can constitute a ``significant nexus.'' See 547 U.S. at 749 (Scalia, 
J., plurality) (``This [strictly ecological] reasoning would swiftly 
overwhelm SWANCC altogether[.]'').
    Several federal courts have now questioned the 2015 Rule's 
interpretation of Justice Kennedy's significant nexus standard in 
Rapanos. The U.S. District Court for the District of North Dakota found 
``[t]he Rule . . . likely fails to meet [Justice Kennedy's significant 
nexus] standard'' and ``allows EPA regulation of waters that do not 
bear any effect on the `chemical, physical, and biological integrity' 
of any navigable-in-fact water.'' North Dakota v. EPA, 127 F. Supp. 3d 
1047, 1056 (D.N.D. 2015). Likewise, the Sixth Circuit stated in 
response to petitioners' ``claim that the [2015] Rule's treatment of 
tributaries, `adjacent waters,' and waters having a `significant nexus' 
to navigable waters is at odds with the Supreme Court's ruling in 
Rapanos'' that ``[e]ven assuming, for present purposes, as the parties 
do, that Justice Kennedy's opinion in Rapanos represents the best 
instruction on the permissible parameters of `waters of the United 
States' as used in the Clean Water Act, it is far from clear that the 
new Rule's distance limitations are harmonious with the instruction.'' 
In re EPA, 803 F.3d at 807 & n.3 (noting that

[[Page 56646]]

``[t]here are real questions regarding the collective meaning of the 
[Supreme] Court's fragmented opinions in Rapanos''). The agencies 
recognize these deficiencies in the 2015 Rule and agree with the 
concerns raised by these courts.
    As explained in the following sections, the agencies find that the 
application of an overly broad significant nexus standard in the 2015 
Rule resulted in a regulatory definition of ``waters of the United 
States'' that did not comport with Justice Kennedy's understanding of 
the limits of federal CWA jurisdiction and exceeded the agencies' 
statutory authority. Moreover, the agencies find that while Justice 
Kennedy noted ``the significant-nexus test itself prevents problematic 
applications of the statute,'' 547 U.S. at 783 (Kennedy, J., 
concurring), including asserting jurisdiction over waters or wetlands 
like those at issue in SWANCC having ``little or no connection'' to 
navigable waters, id. at 767, the 2015 Rule's broad significant nexus 
standard would have led to similar unreasonable applications of the CWA 
that the SWANCC Court and Justice Kennedy both sought to prevent. See 
Section III.C.3, infra.
ii. The 2015 Rule's Definition of (a)(5) Waters Exceeded the Scope of 
CWA Jurisdiction Envisioned in Justice Kennedy's Significant Nexus Test
    The agencies' misinterpretation of Justice Kennedy's significant 
nexus standard resulted in the categorical assertion of per se 
jurisdiction over an expansive ``tributary'' network. The 2015 Rule 
defined ``tributary'' as a water that contributes flow, either directly 
or through another water, to a primary water and that is characterized 
by the presence of the ``physical indicators'' of a bed and banks and 
an ordinary high water mark. ``These physical indicators demonstrate 
there is volume, frequency, and duration of flow sufficient to create a 
bed and banks and an ordinary high water mark, and thus to qualify as a 
tributary.'' 80 FR 37105. The 2015 Rule's ``tributary'' definition 
included channels that flow ``only in response to precipitation 
events,'' id. at 37076-77, and features that may be dry for months or 
many years \37\ as long as they contribute flow, however minimal, 
infrequent, or indirect to a primary water, and exhibit physical 
indicators of a bed, bank, and an ordinary high water mark.
---------------------------------------------------------------------------

    \37\ A study by the U.S. Army Corps of Engineers in the Arid 
West, for example, revealed flood recurrence intervals for the field 
ordinary high water mark ranged from <1 to 15.5 years. See U.S. Army 
Corps of Engineers Engineer Research and Development Centers. ERDC/
CRREL TR-11-12. Ordinary High Flows and the Stage-Discharge 
Relationship in the Arid West Region. Curtis, K.E., R.W. Lichvar, 
L.E. Dixon. (July 2011) at Table 4, available at http://www.spk.usace.army.mil/Portals/12/documents/regulatory/pdf/TR11-12_gage.pdf (hereafter, ``Ordinary High Flows in the Arid West'').
---------------------------------------------------------------------------

    Coupling the 2015 Rule's expansive definition of ``significant 
nexus'' with the findings of the Connectivity Report, the agencies 
concluded at that time that features meeting the rule's ``tributary'' 
definition ``provide many common vital functions important to the 
chemical, physical, and biological integrity of downstream waters'' and 
``function together to affect downstream waters'' such that all 
features that satisfied the ``tributary'' definition could be 
considered ``similarly situated'' and thus assessed together in a 
significant nexus analysis. 80 FR 37066. Because of this aggregate 
approach, the agencies found that all (a)(5) ``tributaries'' could be 
considered categorically jurisdictional because any covered tributary, 
either alone or when considered in combination with other covered 
tributaries in the watershed, had a significant nexus to primary 
waters. 80 FR 37058.
    Though some commenters found that the agencies properly relied on 
the 2015 Rule's scientific record to conclude that features meeting the 
``tributary'' definition possess the requisite significant nexus and 
are thus categorically jurisdictional, other commenters expressed 
concern with the agencies' categorical assertion of jurisdiction over 
covered tributaries. These commenters suggested that the rule's 
``tributary'' definition was too broad and would extend federal 
jurisdiction to features with remote proximity and tenuous connections 
to traditional navigable waters, contrary to the limits of CWA 
authority recognized in Justice Kennedy's Rapanos concurrence.
    The agencies now conclude that the 2015 Rule's ``tributary'' 
definition exceeded the jurisdictional limits envisioned in Justice 
Kennedy's significant nexus standard. Under the 2015 Rule's definition 
of ``tributary,'' the agencies determined that the mere contribution of 
flow to primary waters--however minimal, infrequent, or indirect--and 
the presence of ``physical indicators'' of a bed and banks and an 
ordinary high water mark were sufficient to support the categorical 
assertion of jurisdiction over features (including individual features) 
meeting the definition of ``tributary'' because the agencies determined 
that such features, in the aggregate, would possess a significant nexus 
to navigable waters. See 80 FR 37076. Yet, Justice Kennedy found that 
``[a]bsent some measure of the significance of the connection for 
downstream water quality,'' a ``mere hydrologic connection'' is ``too 
uncertain'' and ``should not suffice in all cases'' as ``the connection 
may be too insubstantial . . . to establish the required nexus'' with 
``navigable waters as traditionally understood.'' 547 U.S. at 784-85 
(Kennedy, J., concurring). Moreover, while Justice Kennedy questioned 
jurisdiction over features with ``[t]he merest trickle [even] if 
continuous'' as potentially lacking a significant nexus to navigable 
waters, id. at 769, the 2015 Rule's definition of ``tributary'' 
categorically includes the merest trickle--whether continuous or 
discontinuous--so long as it contributes flow at some unspecified time, 
directly or indirectly, to downstream navigable-in-fact waters, has the 
requisite physical indicators, and is not covered by an exclusion. Such 
an interpretation of ``tributary'' is, at the very least, in 
significant tension with Justice Kennedy's standard.
    The agencies also conclude that the categorical assertion of 
jurisdiction over features meeting the 2015 Rule's ``tributary'' 
definition, particularly ephemeral features, was inconsistent with 
Justice Kennedy's significant nexus standard. Because ephemeral streams 
were not categorically jurisdictional under the pre-2015 regulations as 
informed by the agencies' applicable guidance, see 2008 Rapanos 
Guidance at 7 (`` `[R]elatively permanent' waters do not include 
ephemeral tributaries which flow only in response to precipitation. . . 
. CWA jurisdiction over these waters will be evaluated under the 
significant nexus standard[.]''), the 2015 Rule's ``tributary'' 
definition expanded the scope of federal CWA jurisdiction over such 
features without subjecting them to a case-specific significant nexus 
evaluation. The agencies expect that the extent of this change might 
have been greater in portions of the country where non-relatively 
permanent (i.e., non-seasonal intermittent and ephemeral) streams are 
more prevalent (e.g., the arid West), relative to other parts of the 
country. The agencies now conclude that this change in the scope of 
federal CWA jurisdiction due to the categorical inclusion of ephemeral 
streams meeting the rule's ``tributary'' definition encroached too far 
into the realm of traditional State land use authority by asserting per 
se federal control over certain waters more appropriately left to the 
jurisdiction of the States, such as

[[Page 56647]]

ephemeral streams distant or far-removed from navigable-in-fact waters. 
This intrusion into State authority does not align with Justice 
Kennedy's significant nexus standard, as it gives rise to the type of 
federalism concerns and ``problematic applications of the statute'' 
that Justice Kennedy's significant nexus test was intended to prevent. 
See 547 U.S. at 783 (Kennedy, J., concurring) (``[T]he significant-
nexus test itself prevents problematic applications of the 
statute[.]''). Though the agencies had found it appropriate to 
categorically include (a)(5) ``tributaries'' due to the ``science-based 
conclusion'' that such waters, either individually or collectively, 
possess the requisite significant nexus, the agencies now find that 
this approach was flawed, as the agencies relied on scientific 
information about the aggregate effects of (a)(5) ``tributaries'' 
without due regard for the limits on federal CWA jurisdiction reflected 
in Justice Kennedy's Rapanos concurrence. See 80 FR 37079; 2015 Rule 
Response to Comments--Topic 8: Tributaries at 140; see also Section 
III.C.1.d, infra.
    The agencies' concerns regarding the breadth of the 2015 Rule's 
``tributary'' definition are echoed in the U.S. District Court for the 
Southern District of Georgia's remand order. Georgia v. Wheeler, No. 
2:15-cv-079, 2019 WL 3949922 (S.D. Ga. Aug. 21, 2019). There, the court 
found that the categorical assertion of jurisdiction over features 
meeting the 2015 Rule's ``tributary'' standard ``is an impermissible 
construction of the CWA,'' as it could cover waters that lack the 
requisite significant nexus, particularly in the Arid West. Id. at *13-
15.
    The agencies also conclude that the 2015 Rule's ``tributary'' 
definition failed to properly account for Justice Kennedy's concerns, 
explained in Rapanos, regarding the use of a broad ``tributary'' 
standard as the ``determinative measure'' of whether adjacent wetlands 
possess the requisite significant nexus. 547 U.S. at 781. Before 
Rapanos, the Corps deemed a water a jurisdictional tributary if it fed 
into a traditional navigable water (or a tributary thereof) and 
possessed ``an ordinary high-water mark,'' defined as a ``line on the 
shore established by the fluctuations of water and indicated by 
[certain] physical characteristics.'' Id. Justice Kennedy found that 
this tributary concept ``may well provide a reasonable measure of 
whether specific minor tributaries bear a sufficient nexus with other 
regulated waters to constitute `navigable waters' under the Act'' if it 
``is subject to reasonably consistent application.'' Id. (citing a 2004 
GAO Report ``noting variation in results among Corps district 
offices''). ``Yet,'' as Justice Kennedy stated, ``the breadth of this 
standard--which seems to leave wide room for regulation of drains, 
ditches, and streams remote from any navigable-in-fact water and 
carrying only minor volumes towards it--precludes its adoption as the 
determinative measure of whether adjacent wetlands are likely to play 
an important role in the integrity of an aquatic system comprising 
navigable waters as traditionally understood.'' Id. ``[M]ere adjacency 
to a tributary of this sort is insufficient; a similar ditch could just 
as well be located many miles from any navigable-in-fact water and 
carry only insubstantial flow towards it. A more specific inquiry, 
based on the significant-nexus standard, is therefore necessary.'' Id. 
at 786. Justice Kennedy's discussion focused on adjacent wetlands 
because the facts of Rapanos presented the question of jurisdiction 
over wetlands. However, his concern that the agencies' ``tributary'' 
definition giving rise to the Rapanos dispute may be overly expansive--
such that federal jurisdiction over wetlands adjacent to those 
tributaries may exceed the scope of the CWA--is relevant to the 
agencies' consideration of the ``tributary'' definition in the 2015 
Rule.
    Justice Kennedy stated that ``[t]hrough regulations or 
adjudication, the Corps may choose to identify categories of 
tributaries that, due to their volume of flow (either annually or on 
average), their proximity to navigable waters, or other relevant 
considerations, are significant enough that wetlands adjacent to them 
are likely, in the majority of cases, to perform important functions 
for an aquatic system incorporating navigable waters,'' id. at 780-81, 
but the 2015 Rule did not properly consider those factors. Under the 
2015 Rule, many minor ditches and ephemeral ``tributaries'' would be 
considered ``navigable waters'' categorically, regardless of their 
distance to traditional navigable waters or whether the downstream 
water quality effects of such individual features are ``speculative or 
insubstantial.'' 547 U.S. at 780 (Kennedy, J., concurring). As such, 
the agencies conclude that the 2015 Rule's ``tributary'' definition 
would have swept in ``drains, ditches, and streams remote from any 
navigable-in-fact water and carrying only minor water volumes towards 
it'' such that it could not be ``the determinative measure of whether 
adjacent wetlands [to such features] are likely to play an important 
role in the integrity of an aquatic system.'' See id. at 781 (Kennedy, 
J., concurring); see also id. at 738 (plurality).\38\
---------------------------------------------------------------------------

    \38\ Courts that have considered the merits of challenges to the 
2015 Rule at the preliminary injunction stage similarly observed 
that the rule may conflict with Justice Kennedy's opinion in 
Rapanos, particularly the rule's definition of ``tributary.'' The 
District of North Dakota found that the definitions in the 2015 Rule 
raise ``precisely the concern Justice Kennedy had in Rapanos, and 
indeed the general definition of tributary [in the 2015 Rule] is 
strikingly similar'' to the standard for tributaries that concerned 
Justice Kennedy in Rapanos. North Dakota, 127 F. Supp. 3d at 1056. 
The Southern District of Georgia also found that ``[t]he same fatal 
defects that plagued the definition of tributaries in Rapanos plague 
the [2015 Rule] here.'' Georgia v. Wheeler, No. 2:15-cv-079, 2019 WL 
3949922, at *16 (S.D. Ga. Aug. 21, 2019).
---------------------------------------------------------------------------

    The agencies now conclude that the 2015 Rule inappropriately 
established per se jurisdiction over features that Justice Kennedy 
characterized as ``drains, ditches, and streams remote from any 
navigable-in-fact water and carrying only minor water volumes toward 
it.'' Id. at 781 (Kennedy, J., concurring). The rule then used those 
``tributaries'' as the starting point from which to establish its 
category of jurisdictional-by-rule ``adjacent'' and ``neighboring'' 
waters and wetlands and the baseline from which to extend distance 
limits of up to 4,000 feet to determine the jurisdictional status of 
those waters and wetlands based on a case-specific significant nexus 
test. In doing so (as described in the next two subsections), the 
agencies now find that they compounded their error and cast an even 
wider net of federal jurisdiction in contravention of Justice Kennedy's 
concurrence in Rapanos.
iii. The 2015 Rule's Definition of (a)(6) Waters Exceeded the Scope of 
CWA Jurisdiction Envisioned in Justice Kennedy's Significant Nexus Test
    Under category (a)(6), the 2015 Rule asserted jurisdiction-by-rule 
over ``all waters adjacent to a water identified in paragraphs (a)(1) 
through (5) of this section, including wetlands, ponds, lakes, oxbows, 
impoundments, and similar waters.'' 80 FR 37104. The agencies did not 
expressly amend the longstanding definition of ``adjacent'' (defined as 
``bordering, contiguous, or neighboring''), but effectively broadened 
the definition by adding a definition of ``neighboring'' that impacted 
the interpretation of ``adjacent.'' The 2015 Rule defined 
``neighboring'' to encompass all waters located within 100 feet of the 
ordinary high water mark of a category (1) through (5) ``jurisdictional 
by rule'' water; all waters located within the 100-year floodplain of a 
category (1) through (5) ``jurisdictional by rule'' water and not more 
than 1,500 feet from the ordinary high water mark of such

[[Page 56648]]

water; all waters located within 1,500 feet of the high tide line of a 
category (1) though (3) ``jurisdictional by rule'' water; and all 
waters within 1,500 feet of the ordinary high water mark of the Great 
Lakes. 80 FR 37105. The entire water was considered neighboring if any 
portion of it lies within one of these zones. See id. The agencies' 
2014 proposed rule did not include these distance limitations on the 
definition of ``adjacent'' or ``neighboring.''
    The agencies received many comments on the NPRM and SNPRM 
discussing the 2015 Rule's approach to ``adjacent'' waters. Many 
commenters asserted that the rule's definition of ``adjacent'' waters 
could cover waters adjacent to remote tributaries, resulting in the 
assertion of jurisdiction over the same type of waters that Justice 
Kennedy suggested did not fall within the scope of CWA jurisdiction. 
Other commenters stated that the 2015 Rule's ``adjacent'' waters 
definition was consistent with Justice Kennedy's significant nexus 
standard because they stated that the scientific record for the 2015 
Rule supported the agencies' finding at that time that such waters had 
a significant nexus to downstream navigable-in-fact waters. After 
considering the public comments, the agencies now find that the 2015 
Rule's treatment of ``adjacent'' exceeded the agencies' statutory 
authority and ran afoul of Justice Kennedy's significant nexus test in 
Rapanos.
    As a threshold matter, because the definition of (a)(6) waters in 
the 2015 Rule was keyed to waters ``adjacent'' to (a)(1) through (a)(5) 
waters, the definition of (a)(6) waters rests on tenuous jurisdictional 
footing for the reasons discussed in the (a)(5) ``tributaries'' section 
above. In addition, the rule's definition of (a)(6) waters did not 
comport with Justice Kennedy's significant nexus test.
    In Rapanos, Justice Kennedy's analysis of the agencies' 
jurisdictional test clearly distinguished between ``wetlands adjacent 
to navigable-in-fact waters,'' which can be regulated based on 
adjacency alone, and wetlands adjacent ``to nonnavigable tributaries,'' 
for which ``the Corps must establish a significant nexus on a case-by-
case basis'' should it seek to regulate them, ``[a]bsent more specific 
regulations.'' 547 U.S. at 782 (Kennedy, J., concurring). Justice 
Kennedy found this individualized significant nexus determination 
``necessary to avoid unreasonable applications of the statute'' in the 
face of ``the potential overbreadth of the Corps' regulations.'' Id. 
Specifically, Justice Kennedy expressed concern that the breadth of the 
Corps' then-existing tributary standard ``precludes its adoption as the 
determinative measure of whether adjacent wetlands are likely to play 
an important role in the integrity of an aquatic system comprising 
navigable waters as traditionally understood.'' Id. at 781.
    The agencies now conclude that the 2015 Rule did just that--adopted 
a categorically jurisdictional rule for all adjacent wetlands (and 
waters) tied to a similarly broad ``tributary'' standard that did not 
adequately respond to Justice Kennedy's concerns about ``insubstantial 
flow'' and remoteness. Id. at 786. The agencies now find that the 2015 
Rule codified the very test that Justice Kennedy rejected and for which 
the dissenting Justices in Rapanos advocated. Justice Stevens, writing 
for himself and three other Justices in dissent, did not share Justice 
Kennedy's concerns with the breadth of the Corps' then-existing 
tributary standard and with it serving as the basis for determining 
adjacency. Indeed, Justice Stevens would have held that the significant 
nexus test ``is categorically satisfied as to wetlands adjacent to 
navigable waters or their tributaries'' because ``it [is] clear that 
wetlands adjacent to tributaries of navigable waters generally have a 
`significant nexus' with the traditionally navigable waters 
downstream.'' 547 U.S. at 807 (Stevens, J., dissenting) (emphasis 
added). Although the agencies sought to implement the significant nexus 
test articulated by Justice Kennedy in Rapanos when finalizing the 2015 
Rule, the agencies now conclude that by failing to address Justice 
Kennedy's concerns as to the breadth of the ``tributary'' definition to 
which the ``adjacent'' definition was tied, the agencies erroneously 
adopted and codified a test more like Justice Stevens's categorical 
test for adjacent waters under the guise of promulgating ``more 
specific regulations.'' Id. at 782 (Kennedy, J., concurring).
    In remanding the 2015 Rule to the agencies, the U.S. District Court 
for the Southern District of Georgia also found that the rule's 
``adjacent'' waters definition relied on an impermissibly broad 
``tributary'' standard. Georgia v. Wheeler, No. 2:15-cv-079, 2019 WL 
3949922, at *15-17 (S.D. Ga. Aug. 21, 2019). There, the court explained 
that though the 2015 Rule's ``tributary'' definition contained the 
additional requirement of a bed and banks, the rule's definition was 
``functionally the same as the definition in Rapanos,'' as the court 
found ``no evidence demonstrating how the addition of bed and banks . . 
. does anything to further limit the definition of tributaries so as to 
alleviate Justice Kennedy's concerns of over-breadth in Rapanos.'' Id. 
at *16-17. The court held that as a result, the ``adjacent'' waters 
provision ``could include `remote' waters . . . that have only a 
`speculative or insubstantial' effect on the quality of navigable in 
fact waters,'' contrary to the significant nexus standard in Justice 
Kennedy's opinion. Id. (quoting Rapanos, 547 U.S. at 778-81 (Kennedy, 
J., concurring)).
    Upon further reflection, including consideration of arguments made 
in the subsequent litigation expressing certain concerns that litigants 
were unable to make during the notice and comment period, as well as 
the decisions of those courts that have preliminarily or finally 
reviewed the 2015 Rule, the agencies now believe that Justice Kennedy 
would not have endorsed the agencies' approach in the 2015 Rule, just 
as he did not join the dissenting Justices in Rapanos. For the agencies 
to conclude otherwise in the 2015 Rule was an error, requiring its 
repeal.
    In addition, the agencies find that the 2015 Rule's definition of 
``adjacent'' also exceeded the agencies' authority to regulate 
``navigable waters'' under the CWA. Under the 2015 Rule, the agencies 
determined that all waters and wetlands meeting the ``adjacent'' 
definition categorically possessed a significant nexus, either alone or 
in combination with similarly situated waters, and thus were 
jurisdictional. 80 FR 37058. The agencies justified this approach 
through heavy reliance on the findings of the Connectivity Report, see 
80 FR 37066, and a reinterpretation of the phrase ``similarly situated 
lands in the region.'' See Section III.C.1.b.i, supra. Under the 2008 
Rapanos Guidance, which the agencies now believe hews closer to Justice 
Kennedy's opinion in that case, only wetlands adjacent to the ``reach 
of the stream that is of the same order'' of a non-navigable tributary 
that is not relatively permanent or wetlands adjacent to but that do 
not directly abut a relatively permanent non-navigable tributary were 
aggregated for the purposes of a significant nexus analysis. 2008 
Rapanos Guidance at 1. In contrast, under the 2015 Rule, these same 
wetlands were per se jurisdictional as ``adjacent waters.'' The 2015 
Rule also expanded the scope of aggregation for its case-specific 
significant nexus analysis to non-adjacent wetlands and waters alone or 
in combination with similarly situated wetlands and waters across an 
entire single point of entry watershed that drains to the nearest 
primary water. The agencies now conclude that this approach was 
inconsistent with the

[[Page 56649]]

agencies' CWA authority as envisioned by Justice Kennedy's concurring 
opinion in Rapanos.
    While the 2015 Rule asserted categorical jurisdiction over ``all 
waters [and wetlands] located within 100 feet of the ordinary high 
water mark'' of even the most remote and minor channel meeting the 
rule's definition of ``tributary,'' Justice Kennedy stated that ``[t]he 
deference owed to the Corps' interpretation of the statute does not 
extend'' to ``wetlands'' that ``lie alongside a ditch or drain, however 
remote or insubstantial, that eventually may flow into traditional 
navigable waters.'' Rapanos, 547 U.S. at 778-79 (Kennedy, J., 
concurring). Justice Kennedy also stated that ``[t]he Corps' theory of 
jurisdiction'' in Rapanos and Carabell--that being ``adjacency to 
tributaries, however remote and insubstantial''--``raises concerns.'' 
Id. at 780. In fact, Justice Kennedy took issue with the dissent's 
conclusion in Rapanos that ``the ambiguity in the phrase `navigable 
waters' allows the Corps to construe the statute as reaching all `non-
isolated wetlands,' '' noting that this position ``seems incorrect.'' 
Id. Further, with respect to wetlands adjacent to nonnavigable 
tributaries, Justice Kennedy determined that ``mere adjacency . . . is 
insufficient. A more specific inquiry, based on the significant-nexus 
standard, is . . . necessary.'' Id. at 786; see also id. at 774 (``As 
Riverside Bayview recognizes, the Corps' adjacency standard is 
reasonable in some of its applications.'') (emphasis added). Yet, under 
the 2015 Rule's expansive ``adjacent'' waters definition, the agencies 
established that adjacency alone was sufficient and reasonable in all 
of its applications--including situations where any portion of a 
physically disconnected wetland lay within 100 feet of a remote drain 
meeting the rule's broad ``tributary'' definition.
    The agencies also find that the 2015 Rule's per se coverage under 
the definition of ``adjacent'' of all waters and wetlands located 
within the 100-year floodplain and within 1,500 feet of the ordinary 
high water mark of a primary water, jurisdictional impoundment, or 
tributary was not consistent with the limits of federal jurisdiction 
under the CWA as interpreted by Justice Kennedy. Pursuant to that 
provision, the rule extended federal jurisdiction to certain isolated 
ponds, wetlands, and ditches categorically simply because they might 
have a hydrologic connection with such waters during a storm event with 
a low probability of occurring in any given year. The agencies now 
conclude that this categorical inclusion was inconsistent with Justice 
Kennedy's significant nexus standard in Rapanos, which requires beyond 
``speculat[ion]'' that a water or wetland ``significantly affect[s] the 
chemical, physical, and biological integrity of other covered waters 
more readily understood as `navigable.' '' Id. at 780. Indeed, Justice 
Kennedy stated that a ``mere hydrologic connection should not suffice 
in all cases'' because it ``may be too insubstantial for the hydrologic 
linkage to establish the required nexus with navigable waters as 
traditionally understood.'' Id. at 784-85 (emphasis added). As applied 
to the facts of Carabell, Justice Kennedy believed that ``possible 
flooding'' was an unduly speculative basis for a jurisdictional 
connection between wetlands and other jurisdictional waters. Id. at 786 
(Kennedy, J., concurring). The Rapanos plurality similarly questioned 
the Corps' broad interpretation of its regulatory authority to include 
wetlands `` `adjacent' to covered waters . . . if they lie within the 
100-year floodplain of a body of water.'' Id. at 728 (Scalia, J., 
plurality) (internal quotation marks and citations omitted). Thus, the 
agencies find that a once in a 100-year hydrologic connection between 
otherwise physically disconnected waters, which satisfied the 
definition of ``neighboring'' in the 2015 Rule, is too insubstantial to 
justify a categorical finding of a ``significant nexus'' with 
navigable-in-fact waters under Rapanos. See also Georgia v. Wheeler, 
No. 2:15-cv-079, 2019 WL 3949922, at *18 (S.D. Ga. Aug. 21, 2019) 
(finding that the 2015 Rule failed to show that the majority of waters 
within the 100-year floodplain have a significant nexus to navigable 
waters). To be sure, certain waters that meet the definition of 
``neighboring'' in the 2015 Rule would meet Justice Kennedy's 
``significant nexus'' test; however, other features that would not meet 
Justice Kennedy's test would nonetheless meet the definition of 
``neighboring'' in the 2015 Rule and thus be jurisdictional per se.
    The agencies therefore find that their interpretation of 
``adjacent'' and ``neighboring'' exceeded the limits of federal CWA 
jurisdiction described by Justice Kennedy and ignored his intention 
that the significant nexus test be used to prevent categorical 
assertion of jurisdiction over all wetlands adjacent to all 
tributaries, broadly defined. The 2015 Rule misconstrued Justice 
Kennedy's significant nexus standard to do exactly the opposite--permit 
categorical assertion of jurisdiction over all wetlands and waters 
``adjacent'' or ``neighboring'' all ``tributaries.'' For the foregoing 
reasons, the agencies conclude that the 2015 Rule's definition of 
(a)(6) waters exceeded their statutory authority.
iv. The 2015 Rule's Inclusion of (a)(7) and (a)(8) Waters That Could Be 
Jurisdictional Under a Case-Specific Significant Nexus Analysis 
Exceeded the Scope of CWA Jurisdiction Envisioned in Justice Kennedy's 
Significant Nexus Test
    The 2015 Rule established two types of jurisdictional waters 
``found after a case-specific analysis to have a significant nexus to 
traditional navigable waters, interstate waters, or the territorial 
seas, either alone or in combination with similarly situated waters in 
the region.'' 80 FR 37058. The first category, (a)(7) waters, consists 
of five specific types of waters in specific regions of the country: 
Prairie potholes, Carolina and Delmarva bays, pocosins, western vernal 
pools in California, and Texas coastal prairie wetlands. Id. at 37105. 
The second category, (a)(8) waters, consists of all waters located 
within the 100-year floodplain of any category (1) through (3) 
``jurisdictional by rule'' water and all waters located within 4,000 
feet of the high tide line or ordinary high water mark of any category 
(1) through (5) ``jurisdictional by rule'' water. Id. The rule 
established no distance limitation for the (a)(7) waters, id. at 37093, 
and the distance-based limitations for the (a)(8) waters were adopted 
without adequate notice in violation of the APA. See Texas v. EPA, No. 
3:15-cv-162, 2019 WL 2272464, at *5 (S.D. Tex. May 28, 2019).\39\
---------------------------------------------------------------------------

    \39\ The agencies also note that the distance limitations in the 
2015 Rule were included without sufficient record support.
---------------------------------------------------------------------------

    The 2015 Rule defined ``significant nexus'' to mean a water, 
including wetlands, that either alone or in combination with other 
similarly situated waters in the region, significantly affects the 
chemical, physical, or biological integrity of a primary water. 80 FR 
37106. Under the 2015 Rule, to determine whether a water, alone or in 
combination with similarly situated waters across a watershed, had a 
``significant nexus,'' the agencies considered nine functions such as 
sediment trapping, runoff storage, provision of life cycle dependent 
aquatic habitat, among others. Id. Under the rule, it was sufficient 
for determining whether a water has a significant nexus if any single 
function performed by the water, alone or together with similarly 
situated

[[Page 56650]]

waters in the watershed of the nearest primary water, contributed 
significantly to the chemical, physical, or biological integrity of the 
nearest primary water. Id.
    The agencies conclude that the 2015 Rule's categories of (a)(7) and 
(a)(8) waters exceeded the agencies' CWA authority for several 
independent reasons. As described in Section III.C.1.a, certain waters 
that fall within the scope of category (a)(8) are beyond the limits of 
federal authority. By establishing a jurisdictional category for (a)(8) 
waters to which the 2015 Rule's case-specific significant nexus test 
applied, the rule would have swept certain ``ponds that are not 
adjacent to open water''--like those isolated ponds and mudflats at 
issue in SWANCC--into the federal regulatory net despite the SWANCC 
Court's conclusion that ``the text of the statute will not allow 
this.'' 531 U.S. at 168. Moreover, like the agencies' interpretation of 
(a)(6) ``adjacent'' waters in the 2015 Rule, the baseline for 
determining if a water was subject to a case-specific significant nexus 
analysis under the 2015 Rule's (a)(8) category was established, among 
other means, according to specified distances keyed to the definition 
of (a)(5) ``tributaries.'' The agencies established a distance up to 
4,000 feet from the ordinary high water mark of even the most remote 
and insubstantial ``tributary'' within which all waters and wetlands 
would be subject to a case-specific significant nexus analysis based in 
large part on the expanded aggregation theory discussed in Section 
III.C.1.b.i.\40\
---------------------------------------------------------------------------

    \40\ The 2015 Rule placed no distance limits on the scope of a 
significant nexus inquiry for waters within the 100-year floodplain 
of a primary water. See 80 FR 37088.
---------------------------------------------------------------------------

    Further, while the 2008 Rapanos Guidance (at 1) limited the case-
specific significant nexus inquiry to (1) non-navigable tributaries 
that are not relatively permanent, (2) wetlands adjacent to non-
navigable tributaries that are not relatively permanent, and (3) 
wetlands adjacent to but that do not directly abut a relatively 
permanent nonnavigable tributary, the 2015 Rule asserted jurisdiction 
over such tributaries and adjacent wetlands categorically and then 
expanded the scope of the case-specific significant nexus test to non-
adjacent waters and wetlands alone or in combination with ``similarly 
situated'' waters and wetlands anywhere within the same single point of 
entry watershed. In other words, the (a)(7) and (a)(8) categories were 
designed to capture waters that fall outside the 2015 Rule's broad 
``adjacent'' waters (a)(6) category. See 80 FR 37080. Given the 
agencies' conclusion that the categorical assertion of jurisdiction 
over features meeting the 2015 Rule's definitions of ``tributary'' and 
``adjacent'' contravened the limits of federal jurisdiction reflected 
in Justice Kennedy's opinion, it necessarily follows that the 2015 
Rule's (a)(7) and (a)(8) categories--which apply to certain waters 
located outside the scope of those jurisdictional-by-rule categories--
similarly exceeded the scope of the agencies' statutory authority. See 
Georgia v. Wheeler, No. 2:15-cv-079, 2019 WL 3949922, at *20 (S.D. Ga. 
Aug. 21, 2019) (finding that the 2015 Rule's (a)(8) provision would 
``extend federal jurisdiction beyond the limits allowed under the 
CWA''). For example, because of the expansive significant nexus test in 
the 2015 Rule coupled with the breadth of certain key concepts and 
terms (e.g., ``tributaries,'' ``adjacent,'' and ``neighboring'') 
relative to the prior regulatory regime, the agencies now conclude that 
the 2015 Rule's (a)(7) and (a)(8) categories would have permitted 
federal jurisdiction over waters and wetlands appearing ``little more 
related to navigable-in-fact waters than were the isolated ponds held 
to fall beyond the Act's scope in SWANCC.'' 547 U.S. at 781-82 
(Kennedy, J., concurring).
    Relying on the concurring opinion of Justice Kennedy,\41\ the 2015 
Rule misapplied the significant nexus standard to subject similarly-
situated waters (including small streams, ephemeral ``tributaries,'' 
non-adjacent wetlands, and small lakes and ponds) across entire 
watersheds that were not already jurisdictional categorically under 
another provision of the 2015 Rule to federal purview. Indeed, taken 
together, the enumeration of the nine functions relevant to the 
``significant nexus'' analysis and the more expansive interpretation of 
``similarly situated'' and ``in the region'' in the 2015 Rule meant 
that the vast majority of water features in the United States would be 
per se jurisdictional or could come within the jurisdictional purview 
of the Federal government pursuant to the rule's (a)(7) and (a)(8) 
provisions for case-specific waters.\42\ As discussed in Section 
III.C.1.b.i, such a result is inconsistent with the limiting nature of 
Justice Kennedy's significant nexus test.
---------------------------------------------------------------------------

    \41\ The agencies note that they requested comment on the 
appropriate scope and application of Justice Kennedy's concurring 
opinion as part of their proposed new definition of ``waters of the 
United States,'' including whether it is the controlling opinion 
from Rapanos, the application of the significant nexus standard to 
tributaries in addition to adjacent wetlands, and related topics. 
See 84 FR 4167, 4177. The agencies are evaluating comments submitted 
in response to that request and need not take positions on those 
questions to support or resolve the issues raised in this 
rulemaking.
    \42\ The agencies noted in 2015 ``that the vast majority of the 
nation's water features are located within 4,000 feet of a covered 
tributary, traditional navigable water, interstate water, or 
territorial sea.'' 2015 Rule Economic Analysis at 11. As such, the 
agencies' attempts to mitigate the expansive reach of (a)(8) waters 
through this distance limitation was illusory.
---------------------------------------------------------------------------

    Justice Kennedy also stated that ``[a]bsent more specific 
regulations . . . the Corps must establish a significant nexus on a 
case-by-case basis when it seeks to regulate wetlands based on 
adjacency to nonnavigable tributaries. Given the potential overbreadth 
of the Corps' regulations, this showing is necessary to avoid 
unreasonable applications of the statute.'' Id. at 782 (emphasis 
added). In the 2015 Rule, the agencies provided more specific 
regulations for ``tributaries'' and ``adjacent'' waters and wetlands, 
both of which were based upon their misinterpretation of Justice 
Kennedy's significant nexus standard. But the agencies then applied 
their overbroad interpretation of significant nexus to the evaluation 
of (a)(7) and (a)(8) waters on case-specific basis. The agencies are 
concerned that there is nothing in Justice Kennedy's concurring opinion 
in Rapanos that indicates he envisioned a case-specific approach to 
establish adjacency-based jurisdiction after more specific regulations 
have been established that purported to establish the categorical 
limits of adjacency. And while the 2015 Rule preamble properly 
characterized Justice Kennedy's acknowledgment that ``the agencies 
could establish more specific regulations or establish a significant 
nexus on a case-by-case basis,'' 80 FR 37058 (emphasis added), the 2015 
Rule nevertheless ``continue[d] to assess significant nexus on a case-
specific basis'' for (a)(7) and (a)(8) waters. Id.
    The 2015 Rule also established different scopes of inquiry for 
determining whether an (a)(7) or (a)(8) water has a significant nexus 
to a primary water. ``For practical administrative purposes, the rule 
[did] not require evaluation of all similarly situated waters under 
paragraph (a)(7) or (a)(8) when concluding that those waters have a 
significant nexus'' to a primary water. 80 FR at 37094. ``When a subset 
of similarly situated waters provides a sufficient science-based 
justification to conclude presence of a significant nexus, for 
efficiency purposes a significant nexus analysis need not unnecessarily 
require time and resources to locate and analyze all

[[Page 56651]]

similarly situated waters in the entire point of entry watershed.'' Id. 
In contrast, ``[a] conclusion that significant nexus is lacking may not 
be based on consideration of a subset of similarly situated waters 
because under the significant nexus standard the inquiry is how the 
similarly situated waters in combination affect the integrity of the 
downstream water.'' Id. (emphasis added). In other words, under the 
2015 Rule, a significant nexus inquiry for (a)(7) and (a)(8) waters may 
be inconclusive until all similarly situated waters across the entire 
single point of entry watershed are analyzed and it is determined that 
such features do not have a significant nexus, when considered in 
combination, to the nearest downstream primary water. The agencies are 
concerned that the potential requirement for an analysis of all broadly 
defined ``similarly situated waters in the region'' until the agencies 
can determine that a feature does not possess a significant nexus to a 
primary water ``raise[s] troubling questions regarding the Government's 
power to cast doubt on the full use and enjoyment of private property 
throughout the Nation.'' Hawkes, 136 S. Ct. 1807, 1812, 1816-17 
(Kennedy, J., concurring). As a result, the agencies are concerned that 
the 2015 Rule potentially leaves ``people in the dark,'' Sessions v. 
Dimaya, No. 15-1498, 2018 U.S. LEXIS 2497, at *39, 42-43 (S. Ct. Apr. 
17, 2018) (Gorsuch, J., concurring in part and concurring in judgment), 
about the jurisdictional status of individual isolated ponds and 
wetlands within their property boundaries until every last similarly 
situated feature within the watershed boundary of the nearest primary 
water is analyzed by the Federal government. The agencies find that 
these concerns provide further support for the agencies' decision to 
repeal the 2015 Rule.
    In summary, the agencies conclude that the significant nexus test 
articulated in the 2015 Rule and the systemic problems associated with 
its use to justify the definition of ``tributary'' (which formed the 
baseline from which to extend the limits of ``adjacent'' waters and the 
scope of case-specific significant nexus analyses) resulted in a 
definition of ``waters of the United States'' that failed to respect 
the limits of the ``significant nexus'' standard articulated in SWANCC 
and Justice Kennedy's Rapanos concurrence. The agencies' conclusion is 
also supported by reasoning that has been adopted by various district 
courts reviewing requests for preliminary injunctions of the 2015 Rule 
and ruling on the merits of the 2015 Rule. The U.S. District Court for 
the District of North Dakota, for example, found that ``[t]he Rule . . 
. likely fails to meet [Justice Kennedy's significant nexus] standard'' 
and ``allows EPA regulation of waters that do not bear any effect on 
the `chemical, physical, and biological integrity' of any navigable-in-
fact water.'' North Dakota v. EPA, 127 F. Supp. 3d 1047, 1056 (D.N.D. 
2015). And the U.S. District Court for the Southern District of Georgia 
found that multiple provisions in the 2015 Rule were inconsistent with 
Justice Kennedy's significant nexus standard, including the rule's 
``tributary'' definition, which the court held extended federal CWA 
jurisdiction ``well beyond what is allowed under Justice Kennedy's 
interpretation of the CWA,'' and the rule's ``adjacent'' waters 
provision, which the court found ``could include `remote' waters . . . 
that have only a `speculative or insubstantial' effect on the quality 
of navigable in fact waters.'' Georgia v. Wheeler, No. 2:15-cv-079, 
2019 WL 3949922, at *14, 17 (S.D. Ga. Aug. 21, 2019) (quoting Rapanos, 
547 U.S. at 778-81 (Kennedy, J., concurring)). Further, as discussed in 
Section III.C.3, the agencies find that the 2015 Rule leads to similar 
unreasonable applications of the CWA that SWANCC and Justice Kennedy 
both sought to prevent. The agencies now conclude that the 2015 Rule 
was flawed due to the systemic misapplication of the significant nexus 
standard, and the agencies therefore repeal the 2015 Rule in its 
entirety to ``avoid the significant constitutional and federalism 
questions'' it raises. 531 U.S. at 174.
c. The 2015 Rule's Expansive Interpretation of the Significant Nexus 
Standard Failed To Give the Word ``Navigable'' in the CWA Sufficient 
Effect
    By applying an expansive interpretation of the significant nexus 
standard within the definitions and treatment of ``tributaries,'' 
``adjacent'' waters, and waters subject to a case-specific 
``significant nexus'' test, the agencies now believe and conclude that 
the 2015 Rule did not give the word ``navigable'' within the phrase 
``navigable waters'' sufficient effect. The CWA grants the agencies 
jurisdiction over ``navigable waters,'' 33 U.S.C. 1311(a), defined as 
``the waters of the United States.'' Id. at 1362(7). ``Congress' 
separate definitional use of the phrase `waters of the United States' 
[does not] constitute[ ] a basis for reading the term `navigable 
waters' out of the statute.'' SWANCC, 531 U.S. at 172. Indeed, 
navigability was ``what Congress had in mind as its authority for 
enacting the CWA.'' Id.
    As described in Section III.B.1, Congress intended to assert 
federal authority over more than just waters traditionally understood 
as navigable but rooted that authority in ``its commerce power over 
navigation.'' Id. at 168 n.3. Therefore, there must necessarily be a 
limit to that authority and to what waters are subject to federal 
jurisdiction. See, e.g., 547 U.S. at 779 (Kennedy, J., concurring) 
(``[T]he word `navigable' in the Act must be given some effect.''); see 
also id. at 734 (Scalia, J., plurality) (``As we noted in SWANCC, the 
traditional term `navigable waters'--even though defined as `the waters 
of the United States'--carries some of its original substance: `[I]t is 
one thing to give a word limited effect and quite another to give it no 
effect whatever.' 531 U.S., at 172.'').
    The agencies find that in defining ``tributary,'' ``adjacent,'' 
``neighboring,'' and ``significant nexus'' broadly so as to sweep 
within federal jurisdiction many ephemeral ``tributaries'' as defined 
in the 2015 Rule, certain remote ditches, and certain isolated ponds 
and wetlands that, like the isolated ponds and mudflats at issue in 
SWANCC, ``bear[ ] no evident connection to navigable-in-fact waters,'' 
547 U.S. at 779 (Kennedy, J., concurring), the 2015 Rule did not give 
sufficient effect to the term ``navigable'' in the CWA. See South 
Carolina v. Catawba Indian Tribe, 476 U.S. 498, 510 n.22 (1986) (``It 
is our duty to give effect, if possible, to every clause and word of a 
statute[.]'' (quoting United States v. Menasche, 348 U.S. 528, 538-39 
(1955)) (internal quotations omitted)). Many commenters expressed a 
similar concern. Other commenters asserted that the 2015 Rule did give 
sufficient effect to the term ``navigable.''
    Justice Kennedy's concurring opinion in Rapanos, which the 2015 
Rule sought to implement, recognized it is a ``central requirement'' of 
the Act that ``the word `navigable' in `navigable waters' be given some 
importance.'' 547 U.S at 778 (Kennedy, J., concurring). If the word 
``navigable'' has any meaning, the CWA cannot be interpreted to 
``permit federal regulation whenever wetlands lie along a ditch or 
drain, however remote and insubstantial, that eventually may flow into 
traditional navigable waters.'' Id. at 778-79 (Kennedy, J., 
concurring). Yet the agencies find that the 2015 Rule did just that in 
certain cases, including sweeping the SWANCC ponds and similarly-
situated waters within federal purview. See Section III.C.1.a, supra. 
The agencies conclude, therefore, that the 2015 Rule did not give 
sufficient effect to the word ``navigable'' in the

[[Page 56652]]

phrase ``navigable waters'' in a manner consistent with SWANCC, Justice 
Kennedy's concurring opinion in Rapanos, or the text of the CWA.
d. Because the 2015 Rule Misinterpreted the Significant Nexus Standard, 
it Misapplied the Findings of the Connectivity Report To Assert 
Jurisdiction Over Waters Beyond the Limits of Federal Authority
    The 2015 Rule relied on a scientific literature review--the 
Connectivity Report--to support exerting federal jurisdiction over 
certain waters. See 80 FR 37065 (``[T]he agencies interpret the scope 
of `waters of the United States' protected under the CWA based on the 
information and conclusions in the [Connectivity] Report.''). The 
report notes that connectivity ``occur[s] on a continuum or gradient 
from highly connected to highly isolated,'' and ``[t]hese variations in 
the degree of connectivity are a critical consideration to the 
ecological integrity and sustainability of downstream waters.'' Id. at 
37057. The conclusions in this report, while informative, cannot be 
dispositive in interpreting the statutory reach of ``waters of the 
United States.'' The definition of ``waters of the United States'' must 
be grounded in a legal analysis of the limits on CWA jurisdiction that 
Congress intended by use of the term ``navigable waters,'' and a 
faithful understanding and application of the limits expressed in 
Supreme Court opinions interpreting that term.
    In its review of a draft version of the Connectivity Report, EPA's 
Science Advisory Board (``SAB'') noted, ``[s]patial proximity is one 
important determinant of the magnitude, frequency and duration of 
connections between wetlands and streams that will ultimately influence 
the fluxes of water, materials and biota between wetlands and 
downstream waters.'' \43\ ``Wetlands that are situated alongside rivers 
and their tributaries are likely to be connected to those waters 
through the exchange of water, biota and chemicals. As the distance 
between a wetland and a flowing water system increases, these 
connections become less obvious.'' \44\ The Connectivity Report also 
recognizes that ``areas that are closer to rivers and streams have a 
higher probability of being connected than areas farther away.'' 
Connectivity Report at ES-4.
---------------------------------------------------------------------------

    \43\ Science Advisory Board, U.S. EPA. Review of the EPA Water 
Body Connectivity Report at 60 (Oct. 17, 2014).
    \44\ Id. at 55.
---------------------------------------------------------------------------

    Yet, as the SAB observed, ``[t]he Report is a science, not policy, 
document that was written to summarize the current understanding of 
connectivity or isolation of streams and wetlands relative to large 
water bodies such as rivers, lakes, estuaries, and oceans.'' \45\ ``The 
SAB also recommended that the agencies clarify in the preamble to the 
final rule that `significant nexus' is a legal term, not a scientific 
one.'' 80 FR 37065. And in issuing the 2015 Rule, the agencies stated, 
``the science does not provide a precise point along the continuum at 
which waters provide only speculative or insubstantial functions to 
downstream waters.'' Id. at 37090. Although the agencies acknowledged 
that science cannot dictate where to draw the line of federal 
jurisdiction, see, e.g., 80 FR 37060, notwithstanding that qualifier, 
the agencies relied on the Connectivity Report extensively in 
establishing the 2015 Rule's definition of ``waters of the United 
States.'' See id. at 37057 (``The [Connectivity] Report provides much 
of the technical basis for [the] rule.'').
---------------------------------------------------------------------------

    \45\ Id. at 2.
---------------------------------------------------------------------------

    In promulgating the 2015 Rule, the agencies stated that the science 
documented in the Connectivity Report showed that Justice Kennedy's 
significant nexus standard was satisfied by the rule's expansive 
definition of ``water of the United States.'' See, e.g., 80 FR 37058 
(`` `[T]ributaries' and `adjacent' waters, are jurisdictional by rule, 
as defined, because the science confirms that they have a significant 
nexus to traditional navigable waters, interstate waters, or 
territorial seas.'' (emphasis added)). Yet, as described previously, 
the definition failed to properly implement the fundamental limits of 
Justice Kennedy's test. In doing so the agencies focused too heavily on 
the nexus component of the significant nexus test to define the scope 
of CWA jurisdiction without appropriate regard to the significance of 
that nexus. While this approach and the Connectivity Report correctly 
recognize that upstream waters are connected to downstream waters, the 
agencies now find that the approach failed to acknowledge that 
``[a]bsent some measure of the significance of the connection for 
downstream water quality, this standard [is] too uncertain'' and ``mere 
hydrologic connection should not suffice in all cases; the connection 
may be too insubstantial for the hydrologic linkage to establish the 
required nexus with navigable waters as traditionally understood.'' 
Rapanos, 547 U.S. at 784-85 (Kennedy, J., concurring). By adopting an 
aggregated watershed-scale approach to CWA jurisdiction, as further 
described in Section III.C.1.b.i, the 2015 Rule interpreted too broadly 
a key element of Justice Kennedy's significant nexus standard and 
greatly increased the scope of federal regulation.
    A number of commenters expressed the view that the agencies relied 
too heavily on scientific principles in interpreting ``significant 
nexus'' in the 2015 Rule and did not adequately consider the legal 
constraints on federal jurisdiction inherent in the CWA's statutory 
text and Supreme Court precedent. Commenters noted that the 
Connectivity Report did not provide the agencies with any ``bright 
lines'' as to where federal CWA jurisdiction begins and ends and that 
the report did not provide any guidance on how to apply Justice 
Kennedy's significant nexus test to a waterbody. Other commenters 
suggested that the agencies appropriately relied on the Connectivity 
Report and the SAB's review of its findings in developing the 2015 
Rule's significant nexus standard. Several commenters, in fact, argued 
that the science underlying the Connectivity Report should drive the 
limits of federal jurisdiction under the CWA.
    The agencies conclude that in establishing the limits of federal 
regulatory authority under the CWA in the 2015 Rule, the agencies 
placed too much emphasis on the information and conclusions of the 
Connectivity Report at the expense of the limits on federal 
jurisdiction reflected in the statutory text and decisions of the 
Supreme Court. According to the 2015 Rule, the Connectivity Report and 
the SAB review confirmed that:

    Tributary streams, including perennial, intermittent, and 
ephemeral streams, are chemically, physically, and biologically 
connected to downstream waters, and influence the integrity of 
downstream waters. Wetlands and open waters in floodplains and 
riparian areas are chemically, physically, and biologically 
connected with downstream waters and influence the ecological 
integrity of such waters. Non-floodplain wetlands and open waters 
provide many functions that benefit downstream water quality and 
ecological integrity, but their effects on downstream waters are 
difficult to assess based solely on the available science.

80 FR 37057. Thus, despite Justice Kennedy's description of the extent 
of ``[t]he deference owed the Corps' interpretation of the statute,'' 
547 U.S. at 778-79 (Kennedy, J., concurring), the agencies concluded 
that the Connectivity Report supported a ``tributary'' definition that 
included certain ``remote and insubstantial'' channels ``that 
eventually may flow into traditional navigable waters,'' id. at 778, an 
``adjacent'' waters definition that

[[Page 56653]]

included all ``wetlands [and waters that] lie alongside'' such 
channels, id., and a case-specific significant nexus test that applied 
to non-adjacent waters and wetlands, either alone or in combination, 
within 4,000 feet of those channels. These aspects of the 2015 Rule, at 
a minimum, created substantial tension with Justice Kennedy's opinion 
in Rapanos.
    Of particular concern to the agencies today is the 2015 Rule's 
broad application of Justice Kennedy's phrase ``similarly situated 
lands in the region.'' As discussed in Section III.C.1.b.i, the 
agencies took an expansive reading of this phrase, in part based on 
``one of the main conclusions of the [Connectivity Report] . . . that 
the incremental contributions of individual streams and wetlands are 
cumulative across entire watersheds, and their effects on downstream 
waters should be evaluated within the context of other streams and 
wetlands in that watershed.'' 80 FR 37066. Yet, Justice Kennedy 
observed in Rapanos that what constitutes a ``significant nexus'' is 
not a solely scientific question and that it cannot be determined by 
environmental effects alone. See, e.g., 547 U.S. at 777-78 (noting that 
although ``[s]cientific evidence indicates that wetlands play a 
critical role in controlling and filtering runoff . . . environmental 
concerns provide no reason to disregard limits in the statutory text'' 
(citations omitted) (emphasis added)); see also Rodriguez v. United 
States, 480 U.S. 522 (1987) (``[N]o legislation pursues its purposes at 
all costs.''). The 2015 Rule's treatment of the phrase ``similarly 
situated'' to mean ``waters that function alike and are sufficiently 
close to function together in affecting downstream waters'' and ``in 
the region'' to mean ``the watershed that drains to the nearest'' 
primary water together expanded the potential jurisdictional purview of 
the Federal government to include the vast majority of the nation's 
waters and contravened the limiting nature of Justice Kennedy's 
description of the significant nexus standard. As a consequence, the 
2015 Rule's aggregation method for purposes of its significant nexus 
inquiry ``raise[d] significant constitutional questions'' similar to 
the Corps' assertion of jurisdiction over the abandoned ponds at issue 
in SWANCC. See Section III.C.3, infra (addressing these constitutional 
questions in further detail).
    The agencies also find that the 2015 Rule placed insufficient 
weight on the direction of the Court in Riverside Bayview regarding the 
limits of federal jurisdiction and instead relied heavily on the 
Connectivity Report to support its assertion of jurisdiction.\46\ The 
2015 Rule stated, ``it is the agencies' task to determine where along 
[the] gradient [of connectivity] to draw lines of jurisdiction under 
the CWA,'' 80 FR 37057, yet in establishing those lines, the agencies 
did not appropriately consider the Riverside Bayview Court's discussion 
regarding the limits of jurisdiction lying within the ``continuum'' or 
``transition'' ``between open waters and dry land.'' 474 U.S. at 132. 
Instead, the agencies appeared to follow the advice of the SAB \47\ and 
issued a definition of ``waters of the United States'' that went far 
beyond that continuum to reach physically disconnected waters and 
wetlands under categories (a)(7) and (a)(8).
---------------------------------------------------------------------------

    \46\ The agencies also note that the 2015 Rule was remanded back 
to the agencies because the final Connectivity Report, which served 
as the scientific foundation for the rule, was not made available to 
the public for review and comment. See Texas v. EPA, No. 3:15-cv-
162, 2019 WL 2272464 (S.D. Tex. May 28, 2019).
    \47\ See, e.g., 80 FR 37064, citing SAB Consideration of the 
Adequacy of the Scientific and Technical Basis of the EPA's Proposed 
Rule titled ``Definition of Waters of the United States under the 
Clean Water Act,'' U.S. EPA (2014) (In promulgating the 2015 Rule, 
the agencies noted that the SAB ``expressed support for the proposed 
rule's . . . inclusion of `other waters' on a case-specific basis'' 
and that the SAB ``found it `appropriate to define `other waters' as 
waters of the United States on a case-by-case basis, either alone or 
in combination with similarly situated waters in the same region.' 
'').
---------------------------------------------------------------------------

2. The 2015 Rule Did Not Adequately Consider and Accord Due Weight to 
Clean Water Act Section 101(b)
    When Congress passed the CWA in 1972, it established the objective 
``to restore and maintain the chemical, physical, and biological 
integrity of the Nation's waters.'' 33 U.S.C. 1251(a). In order to meet 
that objective, Congress provided a major role for the States in 
implementing the CWA and recognized the importance of preserving the 
States' independent authority and responsibility in this area. See 33 
U.S.C 1251(b) and 1370. As the Supreme Court has explained, the ``Clean 
Water Act anticipates a partnership between the States and the Federal 
Government, animated by a shared objective: `to restore and maintain 
the chemical, physical, and biological integrity of the Nation's 
waters.' '' Arkansas v. Oklahoma, 503 U.S. 91, 101 (1992) (emphasis 
added).
    The CWA balances the traditional power of States to regulate land 
and water resources within their borders with the need for federal 
water quality regulation to protect the ``navigable waters'' defined as 
``the waters of the United States, including the territorial seas.'' 33 
U.S.C. 1362(7). Section 101(b) of the Act establishes ``the policy of 
the Congress to recognize, preserve, and protect the primary 
responsibilities and rights of States to prevent, reduce, and eliminate 
pollution'' and ``to plan the development and use . . . of land and 
water resources . . . . '' Id. at 1251(b). Congress also declared as a 
national policy that States manage the major construction grant program 
and implement the core permitting programs authorized by the statute, 
among other responsibilities. Id. The policy statement of 101(b) ``was 
included in the Act as enacted in 1972 . . . prior to the addition of 
the optional state administration program in the 1977 amendments. Thus, 
the policy plainly referred to something beyond the subsequently added 
state administration program of 33 U.S.C. 1344(g)-(l).'' 547 U.S. at 
737 (Scalia, J., plurality) (citations omitted). Congress further added 
that ``[e]xcept as expressly provided in this [Act], nothing in this 
Act shall . . . be construed as impairing or in any manner affecting 
any right or jurisdiction of the States with respect to the waters 
(including boundary waters) of such States.'' 33 U.S.C. 1370. The court 
in Georgia v. Wheeler also recognized the important balance between 
States and the Federal government that Congress prescribed in the CWA, 
explaining that ``[w]hile the CWA allows the federal government to 
regulate certain waters for the purposes of protecting the chemical, 
physical, and biological integrity of the nation's waters, Congress 
also included within that statute a provision which states that the 
policy of Congress is to `recognize, preserve, and protect the primary 
responsibilities and rights of States to prevent, reduce, and eliminate 
pollution, to plan the development and use (including restoration, 
preservation, and enhancement) of land and water resources.' '' Georgia 
v. Wheeler, No. 2:15-cv-079, 2019 WL 3949922, at *22 (S.D. Ga. Aug. 21, 
2019) (internal citation omitted).
    The agencies must develop regulatory programs designed to ensure 
that the full statute is implemented as Congress intended. See, e.g., 
Hibbs v. Winn, 542 U.S. 88, 101 (2004) (``A statute should be construed 
so that effect is given to all its provisions, so that no part will be 
inoperative or superfluous, void or insignificant''). This includes 
pursuing the overall ``objective'' of the CWA to ``restore and maintain 
the chemical, physical, and biological integrity of the Nation's 
waters,'' 33 U.S.C. 1251(a), while implementing the specific ``policy'' 
directives from Congress to preserve state authority over their own

[[Page 56654]]

land and water resources. See id. at 1251(b); see also Webster's II, 
New Riverside University Dictionary (1994) (defining ``policy'' as a 
``plan or course of action, as of a government[,] designed to influence 
and determine decisions and actions;'' an ``objective'' is ``something 
worked toward or aspired to: Goal''). The agencies therefore must 
recognize a distinction between the specific word choices of Congress, 
including the need to develop regulatory programs that aim to 
accomplish the objective of the Act while implementing the specific 
policy directives of Congress. See Section III.B.1 for additional 
discussion of this language in the CWA.
    In promulgating the 2015 Rule, the agencies conclude that they did 
not adequately consider and accord due weight to the policy directive 
of the Congress in section 101(b) of the Act. The 2015 Rule 
acknowledged the language contained in section 101(b) and the vital 
role States and Tribes play in the implementation and enforcement of 
the Act, 80 FR 37059, but it did not appropriately recognize the 
important policy of 101(b) to preserve the traditional power of States 
to regulate land and water resources within their borders or the 
utility and independent significance of the Act's non-regulatory 
programs.\48\ In fact, the agencies failed to adequately acknowledge 
the meaning of perhaps the most important verb in 101(b), the direction 
to ``preserve'' existing State authority. That is, Congress recognized 
existing State authorities at the time it enacted the 1972 CWA 
amendments and directed the agencies to preserve and protect those 
authorities, which includes the authority to regulate certain waters as 
the States deem appropriate, without mandates from the Federal 
government. It is true that the agencies noted that ``States and 
federally-recognized tribes, consistent with the CWA, retain full 
authority to implement their own programs to more broadly and more 
fully protect the waters in their jurisdiction,'' id. at 37060, but the 
agencies did not include a discussion in the 2015 Rule preamble of the 
meaning and importance of section 101(b) in guiding the choices the 
agencies make in setting the outer bounds of CWA jurisdiction. Instead 
of considering this aspect of the 101(b) congressional policy 
directive, the agencies reduced the number of waters subject solely to 
State jurisdiction by broadening their interpretation of ``waters of 
the United States.'' Several commenters offered interpretations of 
section 101(b) of the Act similar to the interpretation that the 
agencies offered in the 2015 Rule and asserted that the import of 
section 101(b) is Congress' policy that States implement the Act and 
have authority to impose conditions that are more stringent than the 
conditions the agencies impose under the Act. As described above, 
however, the policy directive from Congress in section 101(b) is not so 
limited.
---------------------------------------------------------------------------

    \48\ The majority of the agencies' discussion of section 101(b) 
in the preamble to the final 2015 Rule focused on the ``particular 
importance'' of States and Tribes administering the CWA permitting 
programs. 80 FR 37059.
---------------------------------------------------------------------------

    The agencies now conclude that, at a minimum, the 2015 Rule's case-
specific significant nexus provisions stretched the bounds of federal 
jurisdiction to cover certain waters that more appropriately reside in 
the sole jurisdiction of States. In describing those provisions, the 
agencies stated that ``the 100-year floodplain and 4,000 foot 
boundaries in the rule will sufficiently capture for analysis those 
waters that are important to protect to achieve the goals of the Clean 
Water Act.'' 80 FR 37090; see also id. at 37091 (``[P]roviding for 
case-specific significant nexus analysis for waters that are not 
adjacent but within the 4,000 foot distance limit, as well as those 
within the 100-year floodplain of a traditional navigable water, 
interstate water, or the territorial seas . . . will ensure protection 
of the important waters whose protection will advance the goals of the 
Clean Water Act . . . .'') (emphasis added). Such statements--and 
indeed naming the 2015 Rule the ``Clean Water Rule''--imply that waters 
that are not ``waters of the United States'' (i.e., the subset of the 
``Nation's waters'' subject solely to State and tribal authority) are 
not important to protect to meet the objective of the Act. In other 
words, when they finalized the 2015 Rule, the agencies believed the 
rule's definition of ``waters of the United States'' covered all waters 
necessary for regulation under the CWA in order to meet the objective 
of the Act in section 101(a), and in turn neglected to incorporate the 
policy of the Congress in section 101(b). And as the plurality warned 
in Rapanos, ``the expansive theory [of jurisdiction] advanced by the 
Corps, rather than `preserv[ing] the primary rights and 
responsibilities of the States,' would have brought virtually all 
`plan[ning of] the development and use . . . of land and water 
resources' by the States under federal control.'' Rapanos, 547 U.S. at 
737 (Scalia, J., plurality). The 2015 Rule generated the same result, 
and the agencies now conclude that its definition was ``therefore an 
unlikely reading of the phrase `the waters of the United States.''' Id. 
The agencies' conclusion is consistent with the court's holding in 
Georgia v. Wheeler that the 2015 Rule inappropriately encroached on 
traditional state power. The court in that case found that the 2015 
Rule increased the scope of federal jurisdiction ``to a significant 
degree'' and that this ``significant increase in jurisdiction takes 
land and water falling traditionally under the states' authority and 
transfers them to federal authority.'' Georgia v. Wheeler, No. 2:15-cv-
079, 2019 WL 3949922, at *23 (S.D. Ga. Aug. 21, 2019) (footnote 
omitted).
    Several commenters criticized the agencies for not articulating the 
precise limits that the agencies understand section 101(b) to impose. 
The agencies are not concluding in this rulemaking that section 101(b) 
of the Act establishes a precise line between waters that are subject 
to Federal and State regulation, on the one hand, and subject to State 
regulation only, on the other. Instead, they find that the 2015 Rule 
failed to adequately consider and accord due weight to the policy 
directive in section 101(b) and, as a result, asserted jurisdiction 
over certain waters that are more appropriately left solely in the 
jurisdiction of States. For example, as described in Section 
III.C.1.b.iii, the 2015 Rule's definition of ``adjacent'' established 
per se coverage of all waters and wetlands within the 100-year 
floodplain and within 1,500 feet of the ordinary high water mark of a 
primary water, jurisdictional impoundment, or tributary. As a result, 
the rule extended federal jurisdiction to certain isolated ponds, 
wetlands, and ditches categorically simply because they might have a 
hydrologic connection with such waters only during an infrequent storm 
event. Further, the agencies find that the policy directive from the 
Congress in section 101(b) indicates that certain types of isolated 
waters are more appropriately left solely under the jurisdiction of 
States, including those waters the Supreme Court found beyond the 
statute's reach in SWANCC and Rapanos. Leaving these types of waters in 
the sole jurisdiction of States will give due regard to the CWA's 
numerous non-regulatory programs designed to protect and restore the 
Nation's waters, not just its navigable waters, the utility of which 
would be diminished if the ``vast majority'' \49\ of the Nation's 
waters are subject to federal purview under the 2015 Rule.
---------------------------------------------------------------------------

    \49\ 2015 Rule Economic Analysis at 11.
---------------------------------------------------------------------------

    Finally, the 2015 Rule upset the Federal-State balance of the Act 
by

[[Page 56655]]

``mistaken[ly] . . . assum[ing] . . . that whatever might appear to 
further the statute's primary objective must be the law.'' Henson v. 
Santander Consumer USA Inc., 137 S. Ct. 1718, 1725 (2017); see also 
Rapanos, 547 U.S. at 755-56 (Scalia, J., plurality) (``[C]lean water is 
not the only purpose of the statute. So is the preservation of primary 
State responsibility for ordinary land-use decisions. 33 U.S.C. 
1251(b).'') (original emphasis). Several commenters emphasized the 
importance of the objective in section 101(a) to ``restore and maintain 
the chemical, physical, and biological integrity of the Nation's 
waters'' and asserted that the policy directive in section 101(b) does 
not supersede that objective. The agencies recognize the importance of 
the objective in section 101(a), but they also must recognize the 
specific policy directives from Congress in section 101(b).\50\ As the 
Supreme Court has explained, ``an administrative agency's power to 
regulate in the public interest must always be grounded in a valid 
grant of authority from Congress,'' and ``in [its] anxiety to 
effectuate the congressional purpose,'' an agency ``must take care not 
to extend the scope of the statute beyond the point where Congress 
indicated it would stop.'' See FDA v. Brown & Williamson Tobacco Corp., 
529 U.S. 120, 161 (2000) (citations omitted).
---------------------------------------------------------------------------

    \50\ See, e.g., Transcript of Oral Argument at 58, Rapanos v. 
United States and Carabell v. United States, 547 U.S. 715 (2006) 
(Nos. 04-1034, 04-1384). (Quoting Justice Kennedy, ``[T]he Congress 
in 1972 . . . said it's a statement of policy to reserve to the 
States the power and the responsibility to plan land use and water 
resources. And under your definition, I just see that we're giving 
no scope at all to that clear statement of the congressional 
policy.'').
---------------------------------------------------------------------------

    The agencies conclude that the 2015 Rule did not fully recognize 
the ``partnership between the States and the Federal Government'' in 
meeting the ``shared objective'' of the Act. Arkansas v. Oklahoma, 503 
U.S. 91, 101 (1992); see also Motor Vehicle Mfrs. Ass'n v. State Farm 
Mut. Auto. Ins. Co., 463 U.S. 29, 43 (1983) (``Normally, an agency rule 
would be arbitrary and capricious if the agency has . . . entirely 
failed to consider an important aspect of the problem[.]''). As 
discussed in more detail below, by over-emphasizing the importance of 
CWA section 101(a) while not adequately considering and according due 
weight to section 101(b), the agencies extended federal jurisdiction 
over waters that ``raise[d] significant constitutional questions,'' 531 
U.S. at 173, and ``intru[ded] into traditional state authority'' 
without ``a `clear and manifest' statement from Congress.'' 547 U.S. at 
738 (Scalia, J., plurality) (quoting BFP v. Resolution Trust 
Corporation, 511 U.S. 531, 544 (1994)).
3. In Repealing the 2015 Rule, the Agencies Seek To Avoid 
Constitutional Questions Relating to the Scope of CWA Authority
    The agencies now find that the 2015 Rule raised significant 
questions of Commerce Clause authority and encroached on traditional 
State land-use regulation without a clear statement from Congress. As 
explained in Section III.B.2, the Supreme Court has stated that 
``[w]here an administrative interpretation of a statute invokes the 
outer limits of Congress' power, we expect a clear indication that 
Congress intended that result.'' SWANCC, 531 U.S. at 172-73. The Court 
has further stated that this is particularly true ``where the 
administrative interpretation alters the federal-state framework by 
permitting federal encroachment upon a traditional state power.'' Id. 
at 173; see also Atascadero State Hospital v. Scanlon, 473 U.S. 234, 
242-43 (1985) (``If Congress intends to alter the `usual constitutional 
balance between the States and the Federal Government,' it must make 
its intention to do so `unmistakably clear in the language of the 
statute[.]' ''); Gregory v. Ashcroft, 501 U.S. 452, 460-61 (1991) 
(``the plain statement rule . . . acknowledg[es] that the States retain 
substantial sovereign powers under our constitutional scheme, powers 
with which Congress does not readily interfere'').
    Congress relied on the broad authority of the Commerce Clause when 
it enacted the CWA, but it limited the exercise of that authority to 
its power over navigation. SWANCC, 531 U.S. at 168 n.3. In doing so, 
the Supreme Court has explained that Congress specifically sought to 
avoid ``federal encroachment upon a traditional state power.'' Id. at 
172. The Court in SWANCC found that ``[r]ather than expressing a desire 
to readjust the federal-state balance in this manner, Congress chose 
[in the CWA] to `recognize, preserve, and protect the primary 
responsibilities and rights of States . . . to plan the development and 
use . . . of land and water resources . . .'' Id. at 174 (quoting 33 
U.S.C. 1251(b)). The Court found no clear statement from Congress that 
it had intended to permit federal encroachment on traditional State 
power and construed the CWA to avoid the significant constitutional 
questions related to the scope of federal authority authorized therein. 
Id. Similarly, the plurality in Rapanos stated that ``[w]e ordinarily 
expect a `clear and manifest' statement from Congress to authorize an 
unprecedented intrusion into traditional State authority. The phrase 
`the waters of the United States' hardly qualifies.'' Rapanos, 547 U.S. 
at 737-38 (Scalia, J., plurality) (citations omitted).
    In SWANCC, the Court rejected the argument that the use of 
nonnavigable, isolated, intrastate waters by migratory birds fell 
within the power of Congress to regulate activities that in the 
aggregate have a substantial effect on interstate commerce, or that the 
targeted use of the ponds at issue as a municipal landfill was 
commercial in nature. 531 U.S. at 173. Such arguments, the Court noted, 
``raise[d] significant constitutional questions,'' id., and ``would 
result in a significant impingement of the States' traditional and 
primary power over land and water use.'' Id. at 174. Similarly, in 
Rapanos, the plurality applied the clear statement rule when it 
rejected the Corps' attempt to extend CWA jurisdiction to the waters at 
issue in that case. 547 U.S. at 737-38 (Scalia, J., plurality). The 
plurality concluded that any attempt by the Federal government to 
regulate such water would not only be ``an unprecedented intrusion into 
traditional state authority,'' but would also ``stretch[ ] the outer 
limits of Congress' commerce power and raise[ ] difficult questions 
about the ultimate scope of that power.'' Id. at 738.
    As described in Section III.C.1, and as several commenters noted, 
the 2015 Rule extended federal jurisdiction to waters similar to those 
at issue in SWANCC. As a result, the agencies conclude that, like the 
application of the federal rule giving rise to the SWANCC decision, the 
2015 Rule pressed the outer bounds of Congress' Commerce Clause 
authority and encroached on traditional State rights without a clear 
statement from Congress. Under the 2015 Rule, certain nonnavigable, 
isolated, intrastate waters like those at issue in SWANCC would be 
deemed federally jurisdictional as ``adjacent'' waters or other waters 
found on a case-specific basis to have a ``significant nexus'' with 
primary waters. The agencies' expansive interpretation of Justice 
Kennedy's significant nexus standard, and in particular the agencies' 
broad interpretation of the phrase ``similarly situated lands in the 
region,'' resulted in a definition of ``waters of the United States'' 
that included certain isolated ponds and wetlands nearly a mile from 
the nearest ephemeral ``tributary'' or that connect only once in a 
century to waters more traditionally understood as navigable, and 
thereby pressed the boundaries of federal jurisdiction.

[[Page 56656]]

    The 2015 Rule reached so far into the landscape that, as commenters 
noted, it is difficult for private property owners to know whether 
their lands are subject to federal jurisdiction. This is particularly 
evident in the agencies' discussion of the (a)(7) and (a)(8) 
categories. For example, the agencies noted in 2015 that it is possible 
to assert federal jurisdiction over a single wetland feature if the 
agencies determine that a subset of similarly situated waters in the 
watershed have, in combination, a significant nexus to the primary 
waters. But the agencies expressly rejected the ability to determine 
that a single wetland feature is not subject to jurisdiction unless and 
until all similarly situated waters in the watershed of the nearest 
primary watershed are evaluated. See 80 FR 37094-95 (``A conclusion 
that significant nexus is lacking may not be based on consideration of 
a subset of similarly situated waters because under the significant 
nexus standard the inquiry is how the similarly situated waters in 
combination affect the integrity of downstream waters.''). Effectively, 
under the 2015 Rule, a single landowner with an isolated wetland 
located within a large watershed could not receive a negative approved 
jurisdictional determination unless the Federal government is satisfied 
that all ``similarly situated'' wetlands within that watershed do not 
significantly affect the integrity of the downstream primary water.
    This expansive and uncertain cloud of potential federal regulation 
over all or potentially all water features within an entire watershed 
raises the very concerns that the constitutional avoidance doctrine and 
clear statement rule are designed to address. As Justice Kennedy 
observed in 2016, ``the reach and systemic consequences of Clean Water 
Act jurisdiction remain a cause for concern'' and ``continues to raise 
troubling questions regarding the Government's power to cast doubt on 
the full use and enjoyment of private property throughout the Nation.'' 
Hawkes, 136 S. Ct. at 1816-17 (Kennedy, J., concurring) (also 
describing the Act's reach as ``ominous''). The agencies conclude that 
the 2015 Rule amplified those concerns by misapplying the significant 
nexus standard established in SWANCC and further described by Justice 
Kennedy in Rapanos. Just as Justice Kennedy wrote in summary of SWANCC, 
the 2015 Rule likewise ``would raise significant questions of Commerce 
Clause authority and encroach on traditional state land-use 
regulation,'' Rapanos, 547 U.S. at 776 (Kennedy, J., concurring), while 
generating ``problematic applications of the statute.'' Id. at 783. The 
agencies' conclusion is consistent with the court's holding in Georgia 
v. Wheeler. There, the court found that ``like the majority in SWANCC 
and the plurality in Rapanos concluded, the [2015] Rule's vast 
expansion of jurisdiction over waters and land traditionally within the 
states' regulatory authority cannot stand absent a clear statement from 
Congress in the CWA. Since no such statement has been made, the [2015 
Rule] is unlawful under the CWA.'' Georgia v. Wheeler, No. 2:15-cv-079, 
2019 WL 3949922, at *23 (S.D. Ga. Aug. 21, 2019). To avoid questionable 
applications of the Act and a ``theory of jurisdiction that presses the 
envelope of constitutional validity,'' 547 U.S. at 738 (Scalia, J., 
plurality), the agencies repeal the 2015 Rule in its entirety.
4. The Distance-Based Limitations Were Not a Logical Outgrowth of the 
Proposed Rule and Were Not Supported by an Adequate Record
    The agencies inserted the distance limitations into the final 2015 
Rule for the stated purpose of increasing CWA program predictability 
and consistency and reducing the instances in which permitting 
authorities would need to make jurisdictional determinations on a case-
specific basis. 80 FR 37054. These distance limitations therefore were 
important in achieving the stated purposes of the rulemaking and were 
employed in two specific ways. First, the 2015 Rule defined 
``neighboring'' to encompass all waters located within 100 feet of the 
ordinary high water mark of a category (a)(1) through (a)(5) 
``jurisdictional by rule'' water; all waters located within the 100-
year floodplain of a category (a)(1) through (a)(5) ``jurisdictional by 
rule'' water and not more than 1,500 feet from the ordinary high water 
mark of such water; all waters located within 1,500 feet of the high 
tide line of a category (a)(1) through (a)(3) ``jurisdictional by 
rule'' water; and all waters within 1,500 feet of the ordinary high 
water mark of the Great Lakes. 80 FR 37105. The agencies' proposed rule 
did not include these distance limitations in the definition of 
``adjacent'' or ``neighboring.'' See 79 FR 22263. By defining 
``neighboring'' within (a)(6) ``adjacent'' waters in the final rule to 
include these distance limitations, however, the 2015 Rule 
categorically defined waters within large swaths of land within the 
distance limits as jurisdictional. Second, the 2015 Rule applied 
distance limitations when identifying certain waters that would be 
subject to a case-specific analysis to determine if they had a 
``significant nexus'' to a water that is jurisdictional. 80 FR 37104-
05. Waters in section (a)(8) of the 2015 Rule were subject to a case-
by-case jurisdictional determination if they are located within the 
100-year floodplain of any category (a)(1) through (a)(3) 
``jurisdictional by rule'' water or within 4,000 feet of the high tide 
line or ordinary high water mark of any category (a)(1) through (a)(5) 
``jurisdictional by rule'' water. Id. These quantitative measures did 
not appear in the proposed rule nor did they have adequate record 
support.
    In the SNPRM, the agencies requested public comment regarding the 
distance-based limitations in the 2015 Rule. 83 FR 32241. The agencies 
``solicit[ed] comment on whether these distance-based limitations 
mitigated or affected the agencies' change in interpretation of the 
similarly situated waters in the 2015 Rule.'' Id. The SNPRM also noted 
``the concerns raised by some commenters and the federal courts,'' and 
that ``the agencies have reviewed data previously relied upon to 
conclude that the 2015 Rule would have no or `marginal at most' impacts 
on jurisdictional determinations.'' Id. at 32243. The agencies thus 
specifically ``solicit[ed] comment on whether the agencies 
appropriately characterized or estimated the potential scope of CWA 
jurisdiction that could change under the 2015 Rule, including whether 
the documents supporting the 2015 Rule appropriately considered the 
data relevant to and were clear in that assessment.'' Id. Furthermore, 
the agencies sought comment on ``any other issues that may be relevant 
to the agencies' consideration of whether to repeal the 2015 Rule, such 
as whether any potential procedural deficiencies limited effective 
public participation in the development of the 2015 Rule.'' Id. at 
32249.
    The agencies received a number of comments in response to the NPRM 
and SNPRM regarding the distance-based limitations in the 2015 Rule. 
While some commenters suggested that the 2015 Rule's distance-based 
limitations were adequately supported and represented a permissible 
exercise of agency experience and expertise, other commenters asserted 
that the distance-based limitations were arbitrary and lacked support 
in the administrative record for the 2015 Rule. Multiple commenters 
also expressed concern that the public did not have an opportunity to 
comment on the distance limitations used in the 2015 Rule and argued 
that those specific measures were not a logical outgrowth of the 
proposal. Other commenters disagreed that the 2015

[[Page 56657]]

Rule was not a logical outgrowth of the proposal and suggested that the 
agencies had provided adequate notice of the use of distance 
limitations in the final rule.
    After the public comment period on the SNPRM closed, the U.S. 
District Court for the Southern District of Texas remanded the 2015 
Rule to the agencies for failing to comply with the APA, and the U.S. 
District Court for the Southern District of Georgia remanded the 2015 
Rule to the agencies after identifying substantive and procedural 
errors with respect to numerous provisions, including the rule's 
distance limitations. In response to these remands, this final rule 
addresses many of the errors identified by those courts as well as the 
concerns raised by some commenters regarding the distance-based 
limitations used in the 2015 Rule.
a. The Distance-Based Limitations Were Not a Logical Outgrowth of the 
Proposed Rule
    The agencies are aware that litigants challenging the 2015 Rule 
alleged various APA deficiencies, including allegations that the 
distance-based limitations were inserted into the final rule without 
adequate notice and that they were not a logical outgrowth of the 
proposal. The agencies recognize that the U.S. District Court for the 
Southern District of Texas and the U.S. District Court for the Southern 
District of Georgia held that the distance-based limitations in the 
final rule were not a logical outgrowth of the proposal in violation of 
the APA's public notice and comment requirements. See Texas v. EPA, No. 
15-cv-162, 2019 WL 2272464 (S.D. Tex. May 28, 2019); Georgia v. 
Wheeler, No. 2:15-cv-079, 2019 WL 3949922, at *23 (S.D. Ga. Aug. 21, 
2019). The Southern District of Texas found this error ``significant'' 
because the specific distance-based limitations ``alter[ed] the 
jurisdictional scope of the Act.'' Texas, 2019 WL 2272464, at *5. The 
agencies recognize that the Federal government, in prior briefing in 
Texas, Georgia, and other cases, defended the procedural steps the 
agencies took to develop and support the 2015 Rule. Having considered 
all of the public comments and relevant litigation positions, and the 
decisions of the Southern District of Texas and the Southern District 
of Georgia on related arguments, the agencies now agree with the 
reasoning of the Southern District of Texas and the Southern District 
of Georgia and conclude that the proposal for the 2015 Rule did not 
provide adequate notice of the specific distance-based limitations that 
appeared for the first time in the final rule. The agencies should have 
sought public comment on the distance-based limitations before 
including them in the final rule.
b. The Distance-Based Limitations Were Not Supported by an Adequate 
Record
    The agencies are aware that litigants challenging the 2015 Rule 
alleged additional APA deficiencies, such as the lack of record support 
for the distance-based limitations inserted into the final rule without 
adequate notice. The agencies also recognize that the U.S. District 
Court for the Southern District of Georgia held that several provisions 
in the 2015 Rule, including certain distance-based limitations, were 
arbitrary and capricious in violation of the APA. Georgia v. Wheeler, 
No. 2:15-cv-079, 2019 WL 3949922, at *29 (S.D. Ga. Aug. 21, 2019). 
Several commenters on the proposed repeal of the 2015 Rule raised 
similar concerns, arguing that the 2015 Rule was arbitrary and 
capricious because of the lack of record support for those limitations. 
Having considered the public comments and relevant litigation 
positions, the decisions of the Southern District of Texas and Southern 
District of Georgia, and other decisions staying or enjoining the 2015 
Rule, the agencies now conclude that the record for the 2015 Rule did 
not contain sufficient record support for the distance-based 
limitations that appeared for the first time in the final rule.
i. The 100-Year Floodplain Limitation in (a)(6) and (a)(8) Lacked 
Adequate Record Support
    In the record for the 2015 Rule, the agencies included information 
supporting the conclusion that certain waters within a floodplain or 
riparian area have a connection to downstream waters. For example, the 
agencies stated that ``[t]he body of literature documenting 
connectivity and downstream effects was most abundant for perennial and 
intermittent streams, and for riparian/floodplain wetlands.'' 2015 TSD 
at 104; see also id. at 350. The agencies concluded that ``science is 
clear that wetlands and open waters in riparian areas individually and 
cumulatively can have a significant effect on the chemical, physical, 
or biological integrity of downstream waters.'' 80 FR 37089. The 
agencies attempted to substantiate the addition of the 100-year 
floodplain interval on these general scientific conclusions and their 
desire to ``add the clarity and predictability that some commenters 
requested'' to the definition of ``neighboring.'' 2015 TSD at 300. 
However, upon review of the record supporting the distance limitations 
in the 2015 Rule, the agencies now conclude that the record did not 
include adequate support for the specific floodplain interval--the 100-
year floodplain--included in the final rule, even though the agencies 
understood that ``identifying the 100-year floodplain is an important 
aspect of establishing jurisdiction under the rule.'' 80 FR 37081. The 
agencies' conclusion is consistent with the finding of the U.S. 
District Court for the Southern District of Georgia that ``the [2015] 
Rule's use of the 100-year floodplain based on FEMA flood maps to 
define adjacent and case-by-case waters is arbitrary and capricious.'' 
Georgia v. Wheeler, No. 2:15-cv-079, 2019 WL 3949922, at *30 (S.D. Ga. 
Aug. 21, 2019).
    In the proposed rule, the agencies referenced the 100-year 
floodplain in just one passage, stating:

    It should be noted that ``floodplain'' as defined in today's 
proposed rule does not necessarily equate to the 100-year floodplain 
as defined by the Federal Emergency Management Agency (FEMA). 
However, the FEMA defined floodplain may often coincide with the 
current definition proposed in this rule. Flood insurance rate maps 
are based on the probability of a flood event occurring (e.g., 100-
year floods have a 1% probability of occurring in a given year or 
500 year-floods have a 0.2% probability of occurring in a particular 
year). Flood insurance rate maps are not based on an ecological 
definition of the term ``floodplain,'' and therefore may not be 
appropriate for identifying adjacent wetlands and waters for the 
purposes of CWA jurisdiction.

79 FR 22236 (emphasis added). Notwithstanding these important 
limitations identified in the proposal, in the final rule, the agencies 
relied on the availability of FEMA flood insurance rate maps depicting 
100-year floodplains to substantiate the use of that interval. 80 FR 
37083 (``[T]he agencies chose the 100-year floodplain in part because 
FEMA and NRCS together have generally mapped large portions of the 
United States, and these maps are publicly available, well-known and 
well-understood.''). While the agencies acknowledged the limited 
practical import of these maps for setting a floodplain interval in the 
rule, given that ``much of the United States has not been mapped by 
FEMA and, in some cases, a particular map may be out of date and may 
not accurately represent existing circumstances on the ground,'' they 
did not grapple with these limitations. 80 FR 37081. In explaining its 
finding that the agencies' use of the 100-year floodplain to define 
``adjacent'' and ``case-by-case'' jurisdictional waters in the 2015 
Rule was arbitrary and capricious, the U.S. District Court for the 
Southern District of Georgia similarly noted the deficiencies in the 
FEMA floodplain maps, stating that ``the

[[Page 56658]]

Agencies' justification for the 100-year floodplain interval was based 
on an incomplete and in some cases inaccurate flood-map scheme.'' 
Georgia v. Wheeler, No. 2:15-cv-079, 2019 WL 3949922, at *30 (S.D. Ga. 
Aug. 21, 2019).
    Moreover, the agencies did not adequately explain or provide 
adequate record support for why the agencies believed that the 100-year 
floodplain interval was more appropriate than another floodplain 
interval--for instance, the 10-year floodplain, 50-year floodplain, or 
500-year floodplain--in the definition of ``neighboring'' for (a)(6) 
and in (a)(8). In the proposal, the agencies indicated that they were 
considering a more-frequent flood recurrence interval than the 100-year 
flood (and, in turn, a typically smaller floodplain area than the 100-
year floodplain) to implement the proposed ``floodplain'' definition. 
79 FR 22209 (``When determining whether a water is located in a 
floodplain, the agencies will use best professional judgment to 
determine which flood interval to use (for example, 10 to 20 year flood 
interval zone).'' (emphasis added)). Upon review of the record, the 
agencies now acknowledge that they did not materially explain or 
substantiate selection of the 100-year flood interval over, for 
example, the 10- to 20-year flood interval, or any other interval. 
Additionally, although the agencies' technical support document for the 
2015 Rule alluded to ``the scientific literature, the agencies' 
technical expertise and experience'' as supporting the inclusion of the 
100-year floodplain, 2015 TSD at 301, the agencies provided no further 
explanation for why the 100-year floodplain and not another floodplain 
interval was appropriate. Nor did the agencies adequately describe why 
such an interval was appropriate for setting the threshold for per se 
jurisdictional coverage as a ``navigable water,'' rather than a case-
specific coverage. Using a 100-year floodplain interval instead of a 
10-year or 50-year interval would typically subject the waters and 
wetlands within a larger landmass to per se regulation. The Southern 
District of Georgia similarly found that ``[w]hile the [2015] Rule 
provides reasons for using floodplains generally to define 
jurisdiction, it does not provide any other basis for choosing a 100-
year interval as opposed to a different interval (such as a 50-year or 
200-year floodplain).'' Georgia v. Wheeler, No. 2:15-cv-079, 2019 WL 
3949922, at *30 (S.D. Ga. Aug. 21, 2019).
    The agencies' conclusion today echoes court decisions that have 
reviewed the 2015 Rule on the merits and at a preliminary stage. See, 
e.g., Id. at *30; In re EPA, 803 F.3d at 807 (``Even assuming, for 
present purposes, as the parties do, that Justice Kennedy's opinion in 
Rapanos represents the best instruction on the permissible parameters 
of `waters of the United States' as used in the Clean Water Act, it is 
far from clear that the new Rule's distance limitations are harmonious 
with the instruction.'').
ii. The 1,500 Foot Distance Limitation From the Ordinary High Water 
Mark of an (a)(1)-(a)(5) Water in (a)(6) Lacked Adequate Record Support
    In the 2015 Rule, the agencies concluded as a general matter that 
physical proximity between two waters was a critical--if not the most 
critical--factor to determine whether those two waters had a nexus. 
``The science is clear that a water's proximity to downstream waters 
influences its impact on those waters. The Science Report states, 
`[s]patial proximity is one important determinant of the magnitude, 
frequency and duration of connections between wetlands and streams that 
will ultimately influence the fluxes of water, materials and biota 
between wetlands and downstream waters.' Generally, waters that are 
closer to a jurisdictional water are more likely to be connected to 
that water than waters that are farther away.'' 80 FR 37089 (quoting 
the Connectivity Report at ES-11). These conclusions formed the 
principal record basis for the inclusion of a distance limitation in 
the definition of ``neighboring.'' The agencies stated 1,500 feet from 
the ordinary high water mark of an (a)(1) through (a)(5) water and 
within the 100-year floodplain of such waters would be categorically 
jurisdictional ``to protect vitally important waters while at the same 
time providing a practical and implementable rule.'' 2015 TSD at 351. 
However, the agencies now acknowledge that they did not provide 
sufficient record support or an adequate explanation for selecting 
1,500 feet, as compared to another distance, from the ordinary high 
water mark of an (a)(1) through (a)(5) water, 1,500 feet from the high 
tide line of a category (a)(1) through (a)(3) ``jurisdictional by 
rule'' water, or 1,500 feet from the ordinary high water mark of the 
Great Lakes as the boundary within which all wetlands and waters would 
be jurisdictional categorically. Indeed, the agencies did not explain 
why the 1,500-foot distance, as compared to 500 feet, 1,000 feet, or 
another distance, was the appropriate demarcation between categorically 
jurisdictional waters and those waters that could be jurisdictional on 
a case-specific basis under the 2015 Rule. The agencies thereby 
subjected waters and wetlands within a larger landmass to per se 
regulation compared to other smaller distances that may have been 
selected. For these reasons, the agencies conclude that this distance 
limitation in the 2015 Rule lacked adequate record support. The 
agencies' conclusion is consistent with the U.S. District Court for the 
Southern District of Georgia's holding that ``the 1,500-foot limit for 
adjacent waters is arbitrary and capricious because the Agencies did 
not give reasons beyond mere conclusory statements for why this limit 
was selected'' and that ``the Agencies failed to give specific reasons 
grounded in science and the significant-nexus analysis under the CWA 
for why this [1,500-foot] limit was chosen as opposed to any other 
distance.'' Georgia v. Wheeler, No. 2:15-cv-079, 2019 WL 3949922, at 
*30 (S.D. Ga. Aug. 21, 2019). In concluding that the 1,500-foot 
distance limitation in the 2015 Rule lacked adequate record support, 
the agencies are not modifying their inherent rulemaking authority to 
draw a line between jurisdictional and non-jurisdictional waters on the 
``continuum'' ``between open waters and dry land.'' Riverside Bayview, 
474 U.S. at 132. Rather, the agencies are simply acknowledging that 
their prior rulemaking did not include sufficient record support and 
justification to adequately satisfy the procedural mandates of the APA.
iii. The 4,000-Foot Distance Limitation From the High Tide Line or 
Ordinary High Water Mark of Any (a)(1) Through (a)(5) Water in (a)(8) 
Lacked Adequate Record Support
    For waters that were not jurisdictional categorically under the 
2015 Rule, the rule required a case-specific significant nexus analysis 
if those waters are within 4,000 feet of the high tide line or ordinary 
high water mark of any (a)(1) through (a)(5) water. The agencies 
supported their selection of the 4,000-foot outer boundary with general 
statements about the science, the goals of the Act, and administrative 
convenience. See 2015 TSD at 358 (``[D]ue to the many functions that 
waters located within 4,000 feet of the high tide line of a traditional 
navigable water or the territorial seas provide and their often close 
connections to the surrounding navigable in fact waters, science 
supports the agencies' determination that such waters are rightfully 
evaluated on a case-specific basis for significant nexus to a 
traditional navigable water or the

[[Page 56659]]

territorial seas.''); see also id. at 357 (stating that the agencies 
concluded that this limitation would ``sufficiently capture for 
analysis those waters that are important to protect to achieve the 
goals of the Clean Water Act''). The agencies also stated that, in 
their experience, ``the vast majority of waters where a significant 
nexus has been found, and which are therefore important to protect to 
achieve the goals of the Act, are located within the 4,000 foot 
boundary.'' 80 FR 37089; see also 2015 EA/FONSI at 22-23 (``[T]he vast 
majority of wetlands with a significant nexus are located within the 
4,000 foot boundary.''). Upon reconsideration of this part of the 2015 
Rule, the agencies now conclude that they did not provide an adequate 
record basis or adequate explanation for the selection of the 4,000-
foot distance limitation in (a)(8). Indeed, the agencies provided no 
explanation for why 4,000 feet--and not another distance closer to or 
farther from a category (a)(1) through (a)(5) water--is the appropriate 
limitation for case-specific jurisdictional determinations. The 
agencies also provided insufficient explanation for how they determined 
that the vast majority of waters where a significant nexus has been 
found are located within the 4,000 foot boundary, citing in subsequent 
litigation only to general statements about the agencies' experience in 
conducting jurisdictional determinations and an analysis of 199 
jurisdictional determinations \51\ that was not made available for 
public review and comment.\52\ The agencies now conclude that this 
distance limitation was procedurally deficient and based on an 
insufficient record.
---------------------------------------------------------------------------

    \51\ U.S. EPA. Supporting Documentation: Analysis of 
Jurisdictional Determinations for Economic Analysis and Rule (Docket 
ID: EPA-HQ-OW-2011-0880-20877), available at https://www.regulations.gov/document?D=EPA-HQ-OW-2011-0880-20877.
    \52\ In the SNPRM, the agencies described and sought comment on 
the 199 JD analysis and six case studies drawn from it that were 
analyzed as part of the 2015 rulemaking. 83 FR 32244-45. The 199 JD 
analysis concluded that, of the JDs analyzed, ``four sites included 
wetlands or waters that are located further than 4,000 feet from a 
jurisdictional tributary,'' two of which were jurisdictional under 
the pre-existing regulatory regime. The agencies also concluded that 
all four of these sites would ``not be jurisdictional'' under the 
2015 Rule. Upon further review of the 199 JD analysis and the public 
comments received, the agencies now conclude that any reliance on 
the 199 JD analysis to support setting a distance limit of 4,000 
feet was misplaced and provided an insufficient record basis for 
this limitation. First, the analysis considered only one distance 
limit: 4,000 feet. It made no attempt to determine the change in 
jurisdiction that would result if a different numeric limitation had 
been selected or to explain why 4,000 feet was more appropriate than 
another numeric limitation (e.g., 3,000 feet) for capturing the 
majority of waters likely to possess a significant nexus. Second, 
the analysis did not involve performing a case-specific review of 
jurisdiction under the 2015 Rule, but rather entailed applying the 
2015 Rule's parameters to facts contained in existing jurisdictional 
determinations conducted under the pre-existing regulatory regime. 
The agencies now conclude that this approach limits the utility of 
this analysis for determining appropriate distance limits under the 
criteria of the 2015 Rule. Third, the agencies considered only the 
change in jurisdiction of waters beyond 4,000 feet, even though the 
analysis contained certain examples where the agencies concluded 
that the 2015 Rule likely modified jurisdiction over waters within 
4,000 feet that were deemed not jurisdictional under the pre-
existing regulatory regime. See AR-20877 at 2 (2004-001914); id. 
(LRC-2015-31); id. (LRE-1998-1170040-A14); id. at 3 (MVM-2014-460); 
id. at 4 (NAE-2012-1813); id. (NAO-2014-2269). The agencies did not 
explain the importance, if any, of the estimated increase in 
jurisdiction among these six JDs as part of using this analysis. 
Lastly, while the agencies explained how this analysis was 
conducted, the agencies did not fully explain how they used or 
relied upon this analysis. To be sure, in its brief filed in the 
U.S. Court of Appeals for the Sixth Circuit, the United States 
stated that ``Based on [the 199 JD] analysis and their general 
experience implementing the Act since Rapanos, the Agencies 
concluded that setting a distance limit of 4,000 feet would 
encompass those waters that are most likely to have a significant 
nexus while also providing the certainty sought by the public.'' Br. 
at 123. But the agencies did not provide an adequate explanation as 
to how they used or relied upon this analysis in the 2015 Rule's 
preamble, technical support document, response to comments document, 
or economic analysis.
---------------------------------------------------------------------------

iv. The Agencies Conclude the Lack of Adequate Record Support for the 
Distance Limitations Warrants Repeal
    The agencies conclude that the procedural errors and lack of 
adequate record support associated with the distance-based limitations 
described in this section are a sufficient basis, standing alone, to 
warrant repeal of the 2015 Rule. The distance limitations were a 
central aspect of the 2015 Rule, and necessary for the rule to 
accomplish its goal of increasing consistency and predictability. The 
agencies have determined that the notice and record deficiencies 
associated with the distance limitations are fundamental flaws in 
central provisions of the 2015 Rule, and thus the agencies have 
concluded that it would not be appropriate to remediate these errors 
merely by removing the unsupported limitations, as this approach would 
not maintain consistency with the agencies' stated purposes and 
findings in the 2015 Rule. The agencies are considering the possible 
use of distance limitations in the separate rulemaking to establish a 
proposed revised definition of ``waters of the United States.'' See, 
e.g., 84 FR 4189 (requesting comment on potential interpretations of 
adjacency, such as including a distance limit to establish the 
boundaries between Federal and State waters). Pending any final action 
on the separate rulemaking, the agencies conclude that this final rule 
will provide greater certainty by reinstating nationwide a longstanding 
regulatory framework that is familiar to and well-understood by the 
agencies, States, Tribes, local governments, regulated entities, and 
the public. For these reasons, and in response to the remand of the 
2015 Rule from the U.S. District Court for the Southern District of 
Texas, including its concern that the procedural errors altered the 
scope of CWA jurisdiction, and the remand of the U.S. District Court 
for the Southern District of Georgia, including its concerns with the 
substantive and procedural adequacy of the distance-based limitations 
in the final rule, the agencies repeal the 2015 Rule.
    In summary, the deficiencies of the 2015 Rule stem in part from the 
agencies' application of an overly broad significant nexus standard and 
their inadequate consideration of section 101(b) of the Act in 
developing the 2015 Rule. In particular, the agencies find that the 
broad interpretation of Justice Kennedy's significant nexus standard 
adopted in the 2015 Rule was a foundational error that propagated 
throughout the 2015 Rule, misinforming the rule's definitions of 
``significant nexus,'' ``similarly situated,'' ``in the region,'' 
``tributary,'' ``adjacent,'' and ``neighboring.'' As a result, these 
flaws pervaded the 2015 Rule's entire structure and scope and resulted 
in a definition of ``waters of the United States'' that covered waters 
outside the limits on federal CWA jurisdiction intended by Congress and 
reflected in Supreme Court cases, in addition to raising significant 
constitutional questions. The agencies have determined that the 
substantial problems that are discussed throughout Section III, when 
considered collectively in the context of the 2015 Rule, were both 
fundamental and systemic and cannot be addressed individually. Instead, 
the agencies conclude that the 2015 Rule must be repealed in its 
entirety.

IV. Basis for Restoring the Pre-Existing Regulations

    In the NPRM and SNPRM, the agencies proposed to recodify the pre-
2015 regulations to provide regulatory certainty for the agencies, 
their co-regulators, regulated entities, and the public. See, e.g., 82 
FR 34899; 83 FR 32237. The agencies explained that this rulemaking was 
``intended to ensure certainty as to the scope of CWA jurisdiction on 
an interim basis as the agencies proceed to engage in . . . [a] 
substantive review of the appropriate scope of `waters of the United 
States.' ''

[[Page 56660]]

82 FR 34901. The agencies expressly sought comment on whether 
recodifying the prior regulations would provide for greater regulatory 
certainty, see 83 FR 32240, and also solicited comment on ``whether it 
is desirable and appropriate to re-codify [the pre-existing 
regulations] as an interim first step pending a substantive rulemaking 
to reconsider the definition of `waters of the United States.' '' 82 FR 
34903.
    The agencies received a significant number of comments discussing 
the impact of this rulemaking on regulatory certainty. Many commenters 
asserted that the 2015 Rule failed to increase predictability and 
consistency under the CWA, instead creating confusion and uncertainty. 
Some commenters stated that the 2015 Rule broadened the scope of 
federal jurisdiction to include waters that were previously not covered 
under the CWA, which the commenters argued further contributes to 
uncertainty and confusion. Other commenters found that the 2015 Rule 
increased regulatory certainty compared to the pre-existing regulatory 
regime; these commenters asserted that recodifying the pre-existing 
regulations would thus reduce regulatory certainty. After a thorough 
review of the comments received on the NPRM and SNPRM, the agencies 
conclude that this final rule will provide greater regulatory certainty 
and national consistency while the agencies consider public comments on 
the proposed revised definition of ``waters of the United States.'' See 
84 FR 4154 (Feb. 14, 2019).
    This final rule returns implementation of the definition of 
``waters of the United States'' under the CWA to the regulatory regime 
that existed for many years before the agencies issued the 2015 Rule 
and that still exists in more than half the States at the time of the 
publication of this final rule. The agencies have maintained separate 
regulations defining the statutory term ``waters of the United 
States,'' but the text of the regulations have been virtually identical 
since the Corps' and the EPA's 1986 and 1988 rulemakings, respectively. 
See 51 FR 41206 (Nov. 13, 1986) (revising Corps regulations to align 
more closely with EPA regulations defining ``waters of the United 
States''); see also 53 FR 20764 (June 6, 1988) (including language from 
the preamble to the Corps' 1986 regulations to provide ``clarity and 
consistency'' regarding the EPA's regulatory definition of ``waters of 
the United States''). Following the promulgation of the 2015 Rule, the 
agencies have continued to implement those pre-existing regulations 
(commonly referred to as the ``1986 regulations'') in a shifting 
patchwork of States subject to federal court stays of and injunctions 
against the 2015 Rule. In response to court orders regarding the 
agencies' ``waters of the United States'' rulemakings, the EPA has 
maintained a web page with a map reflecting which regulatory regime is 
applicable in each State (https://www.epa.gov/wotus-rule/definition-waters-united-states-rule-status-and-litigation-update).
    For over 30 years, challenges to the agencies' application of the 
1986 regulations have yielded a significant body of case law that has 
helped to define the scope of the agencies' CWA authority and shaped 
the agencies' approach to implementing the pre-2015 regulations. In 
particular, the Supreme Court's decisions in SWANCC and Rapanos inform 
the agencies' implementation of the 1986 regulations. After those 
decisions, the agencies issued interpretive guidance in 2003 and 2008 
that is now longstanding and familiar.\53\ As such, though the text of 
the 1986 regulations has remained largely unchanged,\54\ the agencies 
have refined their application of the 1986 regulatory text consistent 
with Supreme Court decisions and informed by the agencies' guidance and 
their technical experience implementing the Act pursuant to those pre-
existing regulations.
---------------------------------------------------------------------------

    \53\ Joint Memorandum, 68 FR 1991, 1995 (Jan. 15, 2003) 
(providing clarifying guidance regarding the SWANCC decision); U.S. 
EPA & U.S. Army Corps of Engineers, Clean Water Act Jurisdiction 
Following the U.S. Supreme Court's Decision in Rapanos v. United 
States & Carabell v. United States (Dec. 2, 2008), available at 
https://www.epa.gov/sites/production/files/2016-02/documents/cwa_jurisdiction_following_rapanos120208.pdf.
    \54\ In 1993, the agencies added an exclusion for prior 
converted cropland to the definition of ``waters of the United 
States.'' See 58 FR 45008 (Aug. 25, 1993).
---------------------------------------------------------------------------

    The agencies have been applying the 1986 regulations consistent 
with the Supreme Court's decisions in SWANCC and Rapanos and informed 
by the agencies' corresponding guidance for over a decade. The 
agencies, their co-regulators, and the regulated community are thus 
familiar with the pre-2015 Rule regulatory regime and have amassed 
significant experience operating under those pre-existing regulations. 
Agency staff in particular have developed significant technical 
expertise in implementing the 1986 regulations. For example, between 
June 2007 and August 2019, the Corps issued 220,169 approved 
jurisdictional determinations under the pre-2015 Rule regulatory 
regime.\55\
---------------------------------------------------------------------------

    \55\ Data from the U.S. Army Corps of Engineers' Operation and 
Maintenance Business Information Link, Regulatory Module (ORM2) 
database, May 2019.
---------------------------------------------------------------------------

    While some commenters agreed that returning to the pre-2015 Rule 
regulatory regime would promote regulatory certainty, other commenters 
asserted that recodifying the pre-existing regulations would reduce 
regulatory certainty by reinstating the prior regulatory regime's case-
specific significant nexus analysis for certain jurisdictional 
determinations, which the commenters characterized as inconsistent and 
burdensome. In addition, some commenters argued that the agencies' 
proposal to repeal the 2015 Rule and recodify the pre-existing 
regulations disregards the substantial uncertainty, confusion, and 
inconsistencies under the prior regime that the agencies had sought to 
address in developing the 2015 Rule.
    The agencies acknowledge that in issuing the 2015 Rule, the 
agencies intended to ``make the process of identifying waters protected 
under the CWA easier to understand.'' 80 FR 37054, 37057 (June 29, 
2015). Yet, as explained in Section III.C. of this notice, the agencies 
find that the 2015 Rule exceeded the agencies' statutory authority and 
that the agencies did not adequately consider and accord due weight to 
Congress' policy directive in CWA section 101(b) in promulgating the 
2015 Rule. The agencies have concluded that, as a result of those 
fundamental issues, the 2015 Rule must be repealed. At the same time, 
the agencies recognize that the pre-existing regulations pose certain 
implementation challenges, particularly because significant nexus 
analyses continue to be required for certain waters consistent with the 
agencies' still-effective Rapanos Guidance. Following the Supreme 
Court's decisions in SWANCC and Rapanos, which the agencies note did 
not vacate or remand the 1986 regulations, the Corps published a 
guidebook to assist district staff in issuing approved jurisdictional 
determinations.\56\ In particular, the guidebook outlines procedures 
and documentation used to support significant nexus determinations. 
This guidebook has been and continues to be publicly available and will 
continue to serve as a resource in issuing jurisdictional 
determinations under this final rule.
---------------------------------------------------------------------------

    \56\ U.S. Army Corps of Engineers Jurisdictional Determination 
(JD) Form Instructional Guidebook, available at https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/Related-Resources/CWA-Guidance/.
---------------------------------------------------------------------------

    In May 2019, the U.S. District Court for the Southern District of 
Texas remanded the 2015 Rule to the agencies

[[Page 56661]]

on the grounds that the rule violated the APA. Specifically, the court 
found that the rule violated the APA's notice and comment requirements 
because: (1) The 2015 Rule's definition of ``adjacent'' waters (which 
relied on distance-based limitations) was not a ``logical outgrowth'' 
of the proposal's definition of ``adjacent'' waters (which relied on 
ecologic and hydrologic criteria); and (2) the agencies denied 
interested parties an opportunity to comment on the final draft of the 
Connectivity Report, which served as the technical basis for the final 
rule. See Texas v. EPA, No. 3:15-cv-162, 2019 WL 2272464 (S.D. Tex. May 
28, 2019). As the court noted, ``the Final Connectivity Report was the 
technical basis for the Final Rule and was instrumental in determining 
what changes were to be made to the definition of the phrase [`the 
waters of the United States'].'' Id. at 12; see also 80 FR 37057 
(explaining that the Connectivity Report ``provides much of the 
technical basis for [the] [R]ule.''). The court found that, because the 
Connectivity Report was an important basis for the 2015 Rule, 
interested parties should have had an opportunity to comment on the 
final version of the Report. Recodifying the prior regulations restores 
a regulatory regime that is not based on the conclusions in the 
Connectivity Report and remedies the infirmities that the Southern 
District of Texas and the Southern District of Georgia identified in 
the 2015 Rule, including the lack of notice for the distance-based 
limitations in the definition of ``adjacent'' waters and other 
procedural and substantive deficiencies in the rule.
    In the agencies' proposed revised definition of ``waters of the 
United States,'' the agencies seek to establish a clear and 
implementable definition that better effectuates the language, 
structure, and purposes of the CWA. See 84 FR 4174. Pending any final 
action on that proposed rulemaking, the agencies conclude that this 
final rule will provide greater certainty by reinstating nationwide a 
longstanding regulatory framework that is familiar to and well-
understood by the agencies, States, Tribes, local governments, 
regulated entities, and the public.
    A number of commenters supported repealing the 2015 Rule and 
recodifying the prior regulations due to the commenters' concerns that 
litigation over the 2015 Rule creates significant regulatory 
uncertainty. Commenters noted that the 2015 Rule litigation has led to 
different regulatory regimes being in effect in different States, 
thereby burdening regulated entities that operate in multiple States. 
In contrast, some commenters asserted that regulatory uncertainty 
associated with legal challenges to the 2015 Rule is not an adequate 
basis for this rulemaking. Several of these commenters argued that the 
agencies have failed to consider that this rulemaking could also 
generate litigation and contribute to uncertainty.
    For periods of time over the last four years, the agencies have 
applied different regulatory regimes throughout the country as the 
result of preliminary injunctions against the 2015 Rule. By reinstating 
the 1986 definition of ``waters of the United States'' nationwide, this 
final rule will alleviate inconsistencies, confusion, and uncertainty 
arising from the agencies' application of two different regulatory 
regimes across the country. The agencies recognize that this final rule 
may itself be subject to legal challenges, and that this gives rise to 
the possibility of a return to the application of different regulatory 
definitions in different States. Yet, the agencies cannot predict the 
outcome of any future challenges, and the possibility of courts 
enjoining this rule should not preclude the agencies from taking this 
final action. At this time, due to preliminary injunctions against the 
2015 Rule, it is only by finalizing this rule to codify the pre-
existing regulations that the agencies can return to implementing a 
uniform definition of ``waters of the United States'' nationwide.
    Though this final rule is intended to be the first step in a 
comprehensive, two-step rulemaking process, the agencies acknowledge 
that they cannot prejudge the outcome of the separate rulemaking on a 
proposed revised definition of ``waters of the United States.'' 
Regardless of whether the agencies finalize a new definition, the 
agencies conclude that restoring the pre-existing regulations is 
appropriate because, as implemented, those regulations adhere more 
closely than the 2015 Rule to the jurisdictional limits reflected in 
the statute and case law. For example, the agencies find that the prior 
regulatory regime is consistent with the agencies' view that Justice 
Kennedy did not intend for the significant nexus standard to be applied 
in a manner that would result in assertion of jurisdiction over waters 
deemed non-jurisdictional in SWANCC. Moreover, by leaving certain types 
of isolated waters and certain ephemeral streams under the sole 
jurisdiction of States, the pre-existing regulatory framework also 
provides a more appropriate balancing of CWA sections 101(a) and 
101(b). With this final rule, the regulations defining ``waters of the 
United States'' will be those portions of 33 CFR part 328 and 40 CFR 
parts 110, 112, 116, 117, 122, 230, 232, 300, 302, and 401 as they 
existed immediately prior to the 2015 Rule's amendments.\57\ The 
agencies will continue to implement those regulations informed by 
applicable agency guidance documents and consistent with Supreme Court 
decisions and longstanding agency practice. Given the longstanding 
nature of the pre-2015 Rule regulatory framework, its track record of 
implementation and extensive body of related case law, and thus its 
familiarity to regulators, the regulated community and other 
stakeholders, the agencies conclude that this final rule to recodify 
the 1986 regulations will provide greater regulatory certainty and 
nationwide consistency while the agencies consider public comments on 
the proposed revised definition of ``waters of the United States.'' See 
84 FR 4154.
---------------------------------------------------------------------------

    \57\ The agencies observe that this final rule to repeal the 
2015 Rule and restore the prior regulations is consistent with the 
broadly accepted practice of courts to reinstate a prior rule where 
the current regulation is invalid. See, e.g., Paulsen v. Daniels, 
413 F. 3d 999, 1008 (9th Cir. 2005) (``The effect of invalidating an 
agency rule is to reinstate the rule previously in force.''); Action 
on Smoking & Health v. Civil Aeronautics Bd., 713 F.2d 795, 797 (DC 
Cir. 1983) (``Thus, by vacating or rescinding the [rule], the 
judgment of this court had the effect of reinstating the rules 
previously in force.''). Indeed, were a court to find the 2015 Rule 
unlawful, the presumptive remedy would be to reinstate the pre-
existing regulations. While the agencies recognize and fully 
acknowledge that their authority differs from that of a federal 
court, the agencies find that this common judicial practice further 
illustrates the reasonableness of the agencies' decision to replace 
the unlawful 2015 Rule with the prior regulations.
---------------------------------------------------------------------------

V. Alternatives to the Final Rule

    After thoroughly considering comments received on the NPRM and 
SNPRM regarding alternatives to this action, the agencies conclude that 
repealing the 2015 Rule and restoring the pre-2015 Rule regulatory 
regime is the most effective and efficient way to remedy the 
fundamental and systemic flaws of the 2015 Rule, achieve the objectives 
of the Act, and provide regulatory certainty as the agencies consider 
public comments on a proposed revised definition of ``waters of the 
United States.'' See 84 FR 4154.
    Under the APA, a reviewing court will ``hold unlawful and set aside 
agency action, findings, and conclusions found to be . . . arbitrary, 
capricious, an abuse of discretion, or otherwise not in accordance with 
law.'' 5 U.S.C. 706(2)(A). In promulgating a rule to repeal existing 
regulations, agencies must address and consider alternative ways of 
achieving the relevant statute's objectives and must provide adequate 
reasons for abandoning those alternatives. Motor Vehicle Mfrs. Ass'n

[[Page 56662]]

v. State Farm Mut. Auto. Ins. Co., 463 U.S. 29, 48 (1983). Agencies are 
not required, however, to consider ``all policy alternatives in 
reaching a decision.'' Id. at 50-51. Indeed, an agency rulemaking 
``cannot be found wanting simply because the agency failed to include 
every alternative device and thought conceivable by the mind of man . . 
. regardless of how uncommon or unknown that alternative may have 
been.'' Id. (quoting Vermont Yankee Nuclear Power Corp. v. Natural 
Resources Defense Council, Inc., 435 U.S. 519, 551 (1978)).
    The agencies considered alternatives to the final rule throughout 
the rulemaking process. In the preamble to the NPRM, the agencies 
explained that they considered alternatives to the proposed action, 
including simply withdrawing or staying the 2015 Rule, but did not 
identify any alternatives that would provide stability as effectively 
and efficiently as the proposed action pending the conclusion of the 
agencies' two-step rulemaking process. See 82 FR 34899, 34903 (July 27, 
2017). Similarly, in the preamble to the SNPRM, the agencies explained 
that they considered several alternatives to the proposed action, 
including revising specific elements of the 2015 Rule, issuing revised 
implementation guidance, and further extending the applicability date 
of the 2015 Rule. See 83 FR 32227, 32249 (July 12, 2018). The agencies 
then requested comments on ``whether any of these alternative 
approaches would fully address and ameliorate potential deficiencies in 
and litigation risk associated with the 2015 Rule.'' Id. The agencies 
also requested comment on ``whether this proposal is the best and most 
efficient approach to address the potential deficiencies [with the 2015 
Rule] identified in this notice and to provide the predictability and 
regulatory certainty that alternative approaches may not provide.'' Id.
    The agencies received comments suggesting four categories of 
alternatives to the agencies' proposal to repeal the 2015 Rule and 
recodify the pre-existing regulations. Commenters suggested (1) 
revising the 2015 Rule; (2) repealing the 2015 Rule and then 
maintaining or revising the pre-2015 Rule regulatory regime; (3) 
repealing the 2015 Rule but not recodifying the pre-existing 
regulations; and (4) pursuing alternative actions to rulemaking.
    The agencies find that revising select provisions in the 2015 Rule 
would not resolve the fundamental flaws underlying the 2015 Rule and 
would result in the 2015 Rule remaining in place beyond the effective 
date of this final rule. As described earlier, the agencies conclude 
that the 2015 Rule did not implement the legal limits on the scope of 
the agencies' authority under the CWA as intended by Congress and 
reflected in Supreme Court cases, did not adequately consider and 
accord due weight to the policy of the Congress in CWA section 101(b), 
pushed the envelope of the agencies' constitutional and statutory 
authority absent a clear statement from Congress, and included 
distance-based limitations that suffered from procedural errors and a 
lack of adequate record support. Conducting rulemaking to revise 
specific provisions in the 2015 Rule would not remedy these fundamental 
flaws that permeate the rule. The agencies are considering specific 
definitional changes in their separate rulemaking on a proposed revised 
definition of ``waters of the United States.'' The agencies find that 
it is preferable to repeal the 2015 Rule and recodify the pre-existing 
regulations, informed by applicable agency guidance documents and 
consistent with Supreme Court decisions and longstanding agency 
practice, than to leave in place a rule that exceeds the agencies' 
statutory authority--especially a rule of this magnitude--pending a 
separate rulemaking process.
    Similarly, the agencies find that repealing the 2015 Rule, 
reinstating the pre-2015 Rule regulatory regime, and either maintaining 
that regime or using it as a basis for further rulemaking would provide 
less regulatory certainty than the agencies' current two-step 
rulemaking approach. The agencies find that reinstating the 
longstanding and familiar pre-2015 Rule regulatory regime will provide 
regulatory certainty in this interim period, but they also acknowledge 
that the pre-existing regulations pose certain implementation 
difficulties. The agencies thus find that proceeding through the 
agencies' two-step rulemaking process is preferable to maintaining the 
``familiar, if imperfect'' pre-existing regulations. See In re EPA, 803 
F.3d at 808. If the agencies do not finalize a new definition of 
``waters of the United States'' as part of their two-step rulemaking 
process or if a new definition is overturned by a court in the future, 
it is appropriate for the pre-2015 Rule regulatory regime to remain in 
place because, as implemented, it adheres more closely than the 2015 
Rule to the limits imposed by the Act and is longstanding and familiar. 
The agencies conclude that it is appropriate to codify the pre-existing 
regulations as an interim step pending the agencies' separate 
rulemaking to establish a definition of ``waters of the United States'' 
that better effectuates the language, structure, and purposes of the 
Act.
    The agencies also find that repealing the 2015 Rule without 
restoring the pre-2015 Rule regulatory regime would not provide 
regulatory certainty to the same extent as the agencies two-step 
rulemaking approach. The pre-2015 Rule regulatory regime is imperfect, 
but it is longstanding and familiar. As described in Section IV of this 
notice, restoring the pre-2015 Rule regime provides regulatory 
certainty while the agencies reconsider the proper scope of federal CWA 
authority in the agencies' separate rulemaking process.
    Finally, the agencies find that relying solely on non-regulatory 
actions to clarify the definition of ``waters of the United States'' 
would not provide sufficient regulatory certainty. The agencies 
considered revising current guidance, issuing new guidance, and 
developing improved technical tools to assist agency staff, States, 
Tribes and the regulated community in implementing the 2015 Rule. The 
agencies find, however, that adopting these non-regulatory alternatives 
in lieu of regulatory action would provide less regulatory certainty 
than the agencies' two-step rulemaking approach and would not remedy 
the fundamental flaws that permeate the 2015 Rule. In the proposed 
rulemaking to establish a revised definition of ``waters of the United 
States,'' however, the agencies are considering additional ways to 
improve implementation of the definition of ``waters of the United 
States,'' in addition to revising the regulatory definition. See 84 FR 
4198-4200.

VI. Economic Analysis

    The agencies conducted an economic analysis (EA) for the proposed 
rule in 2017 to provide information on the potential changes to the 
costs and benefits of various CWA programs that could result from a 
change in the number of positive jurisdictional determinations when 
repealing the 2015 Rule and recodifying the pre-existing regulations. 
The agencies have since updated their analysis for both the proposed 
rule to revise the definition of ``waters of the United States'' and 
for this final rule. The agencies note that the final decision to 
repeal the 2015 Rule and recodify the pre-existing regulations in this 
rulemaking is not based on the information in the agencies' economic 
analysis. See, e.g., NAHB, 682 F.3d at 1039-40.
    Filings in litigation against the 2015 Rule and comments submitted 
in response to the 2017 proposed repeal of that rule have critiqued the 
methods

[[Page 56663]]

used to estimate the costs and benefits of these actions. After 
assessing the input provided, the agencies have concluded that 
significant flaws in the economic analyses supporting the 2015 Rule and 
the 2017 proposed repeal led to likely overstatements of costs and 
benefits. The agencies have therefore made changes to their 
methodologies in support of this final rule. As a result of these 
changes, the economic analysis for this final rule explores in greater 
depth the role the States play in regulating their water resources, 
corrects and updates the wetland valuation methodology, and more 
clearly acknowledges the uncertainties in the agencies' calculations.
    The most significant reason that costs and benefits of the economic 
analyses accompanying the 2015 Rule and the 2017 proposed repeal may 
have been overestimated is that they did not consider the different 
ways in which State governments could react to a change in CWA 
jurisdiction. Both analyses assumed that States always adjust 
regulatory regimes to match the federal jurisdictional level in 
response to a change in federal jurisdiction. The analysis for this 
final rule responds to the concerns raised by commenters by 
incorporating a more balanced and robust characterization of possible 
State responses to a change in jurisdiction and evaluates a series of 
scenarios that quantify the sensitivity of the costs and benefits to 
varying assumptions about State responses. These changes in analytic 
approach build on the agencies' detailed review of State programs and 
the literature on environmental federalism.
    As described in the EA for this final rule and in the EA for the 
``Proposed Revised Definition of `Waters of the United States,''' 
December 14, 2018, the agencies' revised analysis indicates that 
potential State responses to a change in the definition of a ``water of 
the United States'' fall along a continuum and depend on legal and 
other constraints. Some States cannot currently regulate a more 
expansive set of waters than those subject to the federal CWA 
definition of ``waters of the United States.'' In contrast, States that 
regulate surface waters and wetlands as broadly or more broadly than 
the 2015 Rule, independently of the scope of the federal CWA, may not 
be affected by this action. Complete State ``gap-filling'' could result 
in no change in compliance costs to the regulated community and no 
change in environmental benefits (that is, neither avoided costs nor 
forgone benefits would occur), suggesting a zero-net impact in the 
long-run, and therefore the costs and benefits presented in the 
analyses of the 2015 Rule and its proposed repeal may have been 
overstated for those States. States that fall between these extremes 
are evaluated by either including or excluding them from the estimates 
of cost savings and forgone benefits. In reality some States may 
regulate only a subset of affected waters, but the agencies did not 
have sufficient information to incorporate that level of detail into 
the analysis.
    Another potential outcome of a change in CWA jurisdiction is that 
State governments may be able to find more efficient ways of managing 
local resources than the Federal government, consistent with the theory 
of ``fiscal federalism'' as described in the EA for the final rule. 
Depending on the value of a newly characterized non-jurisdictional 
water, States may or may not choose to regulate that water and the 
compliance costs and environmental benefits of its regulation could 
increase or decrease, respectively. In either case, however, net 
benefits would increase, assuming a State can more efficiently allocate 
resources towards environmental protection due to local knowledge of 
amenities and constituent preferences. As effective regulation requires 
political capital and fiscal resources, however, the likely best 
indication of the way in which States will exercise their authority as 
the Federal government changes the scope of CWA jurisdiction is the way 
in which they have exercised authority in the past and whether the 
infrastructure to manage the regulatory programs already exists. In 
considering a number of scenarios in which States may retain regulatory 
oversight no longer required by the federal regulations implementing 
the CWA, the revised analysis lowers the estimated cost savings and 
forgone benefits of final rule.
    Litigants and commenters on the 2015 Rule and 2017 proposed repeal, 
respectively, also identified concerns with the methods the agencies 
used for the 2015 Rule to value wetlands which the agencies described 
qualitatively in the 2017 proposal. Application of the agencies' 
wetlands valuation studies on a national level led to potentially 
inflated willingness to pay (WTP) estimates and thus an overestimate of 
the expected benefits from the 2015 Rule. The 2015 analysis relied on 
estimates of WTP for wetland preservation or expansion from ten 
studies, but as discussed in the EA for this final rule, the agencies 
have concluded that only five of the ten studies relied upon satisfy 
standard benefit transfer selection criteria established in the EPA's 
own guidelines.
    To correct for the prior use of inappropriate studies and concerns 
with benefit transfer methods used for the 2015 Rule, the agencies 
developed more appropriate methodologies to estimate the value of 
forgone wetland benefits that could arise as a result of this final 
rule. For example, the agencies applied a meta-analysis of wetland 
valuation studies, which combined and synthesized the results from 
multiple valuation studies to estimate a new transfer function. Meta-
analyses control for the confounding attributes of underlying studies, 
so this analysis was able to make use of a larger number of studies 
than the agencies could use for the unit value benefit transfer in the 
analysis supporting the 2015 Rule.
    Even after correcting the approaches taken to estimate State 
responses and value wetlands, the agencies identified a number of 
sources of uncertainty in the economic analyses of the 2015 Rule and 
2017 proposed repeal. For example, in assessing categories of waters 
that the 2015 Rule made newly jurisdictional, the agencies did not 
remove waters subject to that rule's expanded set of exclusions. See 
2015 Rule Economic Analysis at 8. The economic analysis in support of 
the 2015 Rule and its proposed repeal therefore likely considered the 
costs and benefits of regulating waters that would have been subject to 
exclusions and consequently likely overestimated the costs and benefits 
of the rule.
    Similarly, the estimated benefits and costs from the 2015 Rule and 
the 2017 proposed repeal may have incorrectly assumed that the 
percentage increase in costs and benefits of increased positive 
jurisdictional determinations was equal to the percentage increase in 
regulated activities. The analyses assumed that the rule would affect 
entities regulated under the CWA in direct proportion to the percent 
change in positive jurisdictional determinations. This proportional 
assumption could have yielded overestimates.
    While the agencies have striven to make the economic analysis 
supporting this final rule as transparent and accurate as possible, 
their goal in doing so is solely for informational purposes. The 
agencies are repealing the 2015 Rule to ensure that they do not exceed 
their statutory authority, not based on analyses of the economic 
impacts of the 2015 Rule. The economic analyses do, however, provide 
some helpful information about the 2015 Rule and its repeal. The 
agencies developed several scenarios using different assumptions about 
potential State regulation of

[[Page 56664]]

waters to provide a range of costs and benefits. Under the scenario 
that assumes the fewest number of States regulating newly non-
jurisdictional waters, the agencies estimate the final rule would 
produce annual avoided costs ranging between $116 and $174 million and 
annual forgone benefits ranging between $69 to $79 million. When 
assuming the greatest number of States are already regulating newly 
non-jurisdictional waters, the agencies estimate there would be avoided 
annual costs ranging from $61 to $104 million and annual forgone 
benefits are estimated to be approximately $37 to $39 million. Under 
the scenario that assumes no States will regulate newly non-
jurisdictional waters, an outcome the agencies believe would be 
unlikely, the agencies estimate the final rule would produce annual 
avoided costs ranging from $164 to $345 million and annual forgone 
benefits ranging from $138 to $149 million.

VII. The Effect of This Rule and the Agencies' Next Steps

    In defining the term ``waters of the United States'' under the CWA, 
Congress gave the agencies broad discretion to articulate reasonable 
limits on the meaning of that term, consistent with the Act's text and 
its policies as set forth in CWA section 101. See, e.g., Rapanos, 547 
U.S. at 758 (Roberts, C.J., concurring) (``Given the broad, somewhat 
ambiguous, but nonetheless clearly limiting terms Congress employed in 
the Clean Water Act, the Corps and the EPA would have enjoyed plenty of 
room to operate in developing some notion of an outer bound to the 
reach of their authority.'') (emphasis in original). In light of the 
substantial litigation regarding the 2015 Rule and based on the 
agencies' experience and expertise in administering the definition of 
``waters of the United States'' under the CWA under the prior 
regulations, the agencies proposed to repeal the 2015 Rule and put in 
place the pre-existing regulations. This proposal was based on the 
concerns articulated in the NPRM and SNPRM, and the agencies' concern 
that there may be significant disruption to the implementation of the 
Act and to the public, including regulated entities, if the 2015 Rule 
were vacated in part. With this final rule, the agencies exercise their 
discretion and policy judgment and repeal the 2015 Rule permanently and 
in its entirety because the agencies believe that this approach is the 
most appropriate means to remedy the deficiencies of the 2015 Rule 
identified above, address the extensive litigation surrounding the 2015 
Rule, and restore a regulatory process that has been in place for 
years.
    The 2015 Rule amended longstanding regulations contained in 
portions of 33 CFR part 328 and 40 CFR parts 110, 112, 116, 117, 122, 
230, 232, 300, 302, and 401 by revising, removing, and re-designating 
certain paragraphs and definitions in those regulations. With this 
final rule, the agencies repeal the 2015 Rule and restore the 
regulations in existence immediately prior to the 2015 Rule. As such, 
the regulatory definitions of ``waters of the United States'' in effect 
beginning on the effective date of this final rule are those portions 
of 33 CFR part 328 and 40 CFR parts 110, 112, 116, 117, 122, 230, 232, 
300, 302, and 401 as they existed immediately prior to the 2015 Rule's 
amendments. See, e.g., API v. EPA, 883 F.3d 918, 923 (D.C. Cir. 2018) 
(regulatory criterion in effect immediately before enactment of 
criterion that was vacated by the court ``replaces the now-vacated'' 
criterion); see also supra at note 58.
    With this final rule, the agencies recodify the prior regulations 
in the CFR, which avoids creating a regulatory vacuum with the repeal 
of the 2015 Rule, and the agencies need not consider the potential 
consequences of such a regulatory vacuum in light of this. The agencies 
will apply the prior definition consistent with Supreme Court decisions 
and longstanding practice, as informed by applicable guidance 
documents, training, and experience, while the agencies consider public 
comments on the proposed revised definition of ``waters of the United 
States.'' See 84 FR 4154.
    The current regulatory scheme for determining CWA jurisdiction is 
``familiar, if imperfect,'' In re EPA, 803 F.3d at 808, and the 
agencies and regulated public have significant experience operating 
under the longstanding regulations that were replaced by the 2015 Rule. 
Apart from a roughly six-week period when the 2015 Rule was in effect 
in 37 States and the period since the August 16, 2018 U.S. District 
Court for the District of South Carolina decision enjoining the 
applicability date rule nationwide, which placed the 2015 Rule into 
effect in 26 States (at that time), the District of Columbia, and U.S. 
Territories, the agencies have continued to implement the pre-existing 
regulatory definitions in more than half of the States.
    The agencies acknowledge that the pre-existing regulations have 
been criticized and their application has been narrowed by various 
legal decisions, including SWANCC and Rapanos; however, the 
longstanding nature of the regulatory framework and its track record of 
implementation makes it preferable at this time. The agencies believe 
that, until a new definition is completed, it is important to retain 
the regulations that have been implemented for many years rather than 
the 2015 Rule, which has been and continues to be mired in litigation 
and recently was remanded back to the agencies for extending the 
agencies' delegated authority beyond the limits of the CWA and 
violating the APA when promulgating it.
    Restoration of the prior regulatory text in the CFR, interpreted in 
a manner consistent with Supreme Court decisions, and informed by 
applicable agency guidance documents and longstanding practice, will 
ensure that the scope of CWA jurisdiction will be administered in the 
same manner as it has been in those States where the 2015 Rule has been 
enjoined and as it was for many years prior to the promulgation of the 
2015 Rule. To be clear, the agencies are not finalizing a revised 
definition of ``waters of the United States'' in this specific 
rulemaking different from the definition that existed immediately prior 
to the 2015 Rule. The agencies also are not finalizing this rule in 
order to fill a regulatory gap because no such gap exists today. See 83 
FR 5200, 5204. Rather, the agencies solely repeal the 2015 amendments 
to the above-referenced portions of the CFR and recodify the pre-
existing regulatory text as it existed immediately prior to the 2015 
Rule's amendments.
    The agencies recognize that approved jurisdictional determinations 
(AJDs) issued under the 2015 Rule could potentially be affected by this 
final rule. An AJD is a document issued by the Corps stating the 
presence or absence of ``waters of the United States'' on a parcel. See 
33 CFR 331.2. As a matter of policy, AJDs are valid for a period of 
five years from the date of issuance unless new information warrants 
revision before the expiration date or a District Engineer identifies 
specific geographic areas with rapidly changing environmental 
conditions that merit re-verification on a more frequent basis. See 
U.S. Army Corps of Engineers, Regulatory Guidance Letter No. 05-02, 
Sec.  1(a), p. 1 (June 2005) (RGL 05-02). Additionally, the possessor 
of a valid AJD may request the Corps reassess a parcel and grant a new 
AJD before the five-year expiration date. An AJD constitutes final 
agency action pursuant to the agencies' definition of ``waters of the 
United States'' at the time of its issuance, see Hawkes, 136 S. Ct. at 
1814, and therefore, this final rule does not invalidate an AJD that 
was issued under the 2015 Rule. As such, an AJD issued

[[Page 56665]]

under the 2015 Rule will remain valid until its expiration date unless 
one of the criteria for revision is met under RGL 05-02, or the 
recipient of such an AJD requests a new AJD be issued under the pre-
2015 regulations and guidance pursuant to this final rule. Preliminary 
jurisdictional determinations (PJDs), however, are merely advisory in 
nature, make no legally binding determination of jurisdiction, and have 
no expiration date. See 33 CFR 331.2; see also U.S. Army Corps of 
Engineers, Regulatory Guidance Letter No. 16-01 (October 2005). As 
such, PJDs are unaffected by this final rule because they do not 
definitively state whether there are ``waters of the United States'' on 
a parcel. See Hawkes, 136 S. Ct. at 1812. However, as with AJDs, a 
recipient of a PJD issued under the 2015 Rule may request a new PJD be 
issued under the pre-2015 regulations and guidance.
    The agencies note that repealing the 2015 Rule and restoring the 
pre-existing regulatory definition of ``waters of the United States'' 
does not affect the scope of waters that the Corps retains in States 
that have assumed the CWA section 404 dredged or fill material permit 
program, or the waters the Corps would retain should States and Tribes 
assume the program in the future. When States or Tribes assume 
administration of the section 404 program, the Corps retains 
administration of permits in certain waters. 33 U.S.C. 1344(g). The 
scope of CWA jurisdiction as defined by ``waters of the United States'' 
is entirely distinct from the scope of waters over which the Corps 
retains authority following State or tribal assumption of the section 
404 program. The retained waters are identified during approval of a 
State or tribal section 404 program and any modifications are approved 
through a formal EPA process. 40 CFR 233.36. The way in which the Corps 
identifies waters to be retained was most recently addressed on July 
30, 2018, in a memorandum from R.D. James, Assistant Secretary of the 
Army (Civil Works).\58\ The EPA also intends to clarify the issue in a 
separate ongoing rulemaking process designed to facilitate State and 
tribal assumption of the section 404 program.
---------------------------------------------------------------------------

    \58\ The memorandum is available at https://www.army.mil/e2/c/downloads/525981.pdf.
---------------------------------------------------------------------------

    The agencies proposed a revised definition of ``waters of the 
United States'' on February 14, 2019, see 84 FR 4154, as the second 
step of the comprehensive two-step process consistent with the 
Executive Order signed on February 28, 2017, ``Restoring the Rule of 
Law, Federalism, and Economic Growth by Reviewing the `Waters of the 
United States Rule.' '' The agencies proposed to interpret the term 
``waters of the United States'' to encompass: Traditional navigable 
waters, including the territorial seas; tributaries that contribute 
perennial or intermittent flow to such waters; certain ditches; certain 
lakes and ponds; impoundments of otherwise jurisdictional waters; and 
wetlands adjacent to other jurisdictional waters. The public comment 
period for the proposed revised definition of ``waters of the United 
States'' closed on April 15, 2019, and the agencies are reviewing and 
considering approximately 620,000 comments they received. If finalized, 
the revised definition of ``waters of the United States'' will replace 
the regulations that the agencies are finalizing in this notice.

VIII. Statutory and Executive Order Reviews

A. Executive Order 12866: Regulatory Planning and Review; Executive 
Order 13563: Improving Regulation and Regulatory Review

    This action is an economically significant regulatory action that 
was submitted to the Office of Management and Budget (OMB) for review. 
Any changes made in response to OMB recommendations have been 
documented in the docket.
    While the economic analysis is informative in the rulemaking 
context, the agencies are not relying on the economic analysis 
performed pursuant to Executive Orders 12866 and 13563 and related 
procedural requirements as a basis for this final rule. See, e.g., 
NAHB, 682 F.3d at 1039-40 (noting that the quality of an agency's 
economic analysis can be tested under the APA if the ``agency decides 
to rely on a cost-benefit analysis as part of its rulemaking'').

B. Executive Order 13771: Reducing Regulations and Controlling 
Regulatory Cost

    This rule is an Executive Order 13771 deregulatory action. Details 
on the estimated cost savings of this rule can be found in the economic 
analysis in the docket for this rule.

C. Paperwork Reduction Act

    This rule does not impose any new information collection burdens 
under the Paperwork Reduction Act.

D. Regulatory Flexibility Act

    The Regulatory Flexibility Act generally requires an agency to 
conduct a regulatory flexibility analysis of any rule subject to notice 
and comment rulemaking requirements unless the agency certifies that 
the rule will not have a significant economic impact on a substantial 
number of small entities. Small entities include small businesses, 
small not-for-profit enterprises, and small governmental jurisdictions.
    The repeal of the 2015 Rule and recodification of the prior 
regulations is a deregulatory action because the 2015 Rule exceeded the 
agencies' statutory authority. This action avoids the imposition of 
potentially significant adverse economic impacts on small entities in 
the future. Details on the estimated cost savings of this rule can be 
found in the economic analysis published with this rule. Accordingly, 
after considering the potential economic impacts of the final rule on 
small entities, we certify that this action will not have a significant 
economic impact on a substantial number of small entities.

E. Unfunded Mandates Reform Act

    Under section 202 of the Unfunded Mandates Reform Act of 1995 
(UMRA), signed into law on March 22, 1995, an agency must prepare a 
budgetary impact statement to accompany any proposed or final rule that 
includes a federal mandate that may result in estimated cost to State, 
local, or tribal governments in the aggregate, or to the private 
sector, of $100 million or more. Under section 205 of the UMRA, the 
agency must select the most cost-effective and least burdensome 
alternative that achieves the objectives of the rule and is consistent 
with statutory requirements. Section 203 requires the agency to 
establish a plan for informing and advising any small governments that 
may be significantly or uniquely impacted by the rule. This action does 
not contain any unfunded mandate as described in the UMRA and does not 
significantly or uniquely affect small governments. The definition of 
``waters of the United States'' applies broadly to CWA programs. The 
action imposes no enforceable duty on any State, local, or tribal 
governments, or the private sector, and does not contain regulatory 
requirements that significantly or uniquely affect small governments.

F. Executive Order 13132: Federalism

    Executive Order 13132 requires the agencies to develop an 
accountable process to ensure ``meaningful and timely input by state 
and local officials in the development of regulatory policies that have 
federalism implications.'' ``Policies that have federalism 
implications'' is defined in the Executive Order to include regulations 
that have ``substantial direct

[[Page 56666]]

effects on the States, on the relationship between the national 
government and the States, or on the distribution of power and 
responsibilities among the various levels of government.'' Under 
Executive Order 13132, the agencies may not issue a regulation that has 
federalism implications, that imposes substantial direct compliance 
costs, and that is not required by statute, unless the Federal 
government provides the funds necessary to pay the direct compliance 
costs incurred by State and local government, or the agencies consult 
with State and local officials early in the process of developing the 
proposed regulation. The agencies also may not issue a regulation that 
has federalism implications and that preempts state law unless the 
agencies consult with State and local officials early in the process of 
developing the proposed regulation.
    This final rule will not have substantial direct effects on the 
States, on the relationship between the national government and States, 
or on the distribution of power and responsibilities among the various 
levels of government, as specified in Executive Order 13132, because it 
returns the relationship between the Federal government and the States 
to the longstanding and familiar distribution of power and 
responsibilities established in the CWA for many years prior to the 
2015 Rule. Thus, the requirements of section 6 of the Executive Order 
do not apply to this final rule.

G. Executive Order 13175: Consultation and Coordination With Indian 
Tribal Governments

    Executive Order 13175, entitled ``Consultation and Coordination 
with Indian Tribal Governments'' (65 FR 67249, Nov. 9, 2000), requires 
the agencies to develop an accountable process to ensure ``meaningful 
and timely input by tribal officials in the development of regulatory 
policies that have tribal implications.'' This final rule does not have 
tribal implications, as specified in Executive Order 13175. This final 
rule will not have substantial direct effects on tribal governments, on 
the relationship between the Federal government and Indian tribes, or 
on the distribution of power and responsibilities between the Federal 
government and Indian tribes, because it returns the relationship 
between the Federal government and the Tribes to the longstanding and 
familiar distribution of power and responsibilities that existed under 
the CWA for many years prior to the 2015 Rule. Thus, Executive Order 
13175 does not apply to this final rule. Consistent with Executive 
Order 13175, however, the agencies have consulted with tribal 
officials, as appropriate, as part of the separate rulemaking on a 
proposed revised definition of ``waters of the United States.'' As part 
of the tribal consultation process for the proposed revised definition, 
some Tribes commented on this rulemaking to repeal the 2015 Rule and 
restore the pre-existing regulations, including in letters to the 
agencies and during outreach and consultations meetings.

H. Executive Order 13045: Protection of Children From Environmental 
Health Risks and Safety Risks

    Executive Order 13045, ``Protection of Children from Environmental 
Health Risks and Safety Risks'' (62 FR 19885, Apr. 23, 1997), applies 
to any rule that: (1) Is determined to be ``economically significant'' 
as defined under Executive Order 12866, and (2) concerns an 
environmental health or safety risk that an agency has reason to 
believe may have a disproportionate effect on children. If the 
regulatory action meets both criteria, the agency must evaluate the 
environmental health or safety effects of the planned rule on children, 
and explain why the planned regulation is preferable to other 
potentially effective and reasonably feasible alternatives considered 
by the agency. This rule is not subject to Executive Order 13045 
because it does not involve decisions intended to mitigate 
environmental health or safety risks.

I. Executive Order 13211: Actions Concerning Regulations That 
Significantly Affect Energy Supply, Distribution, or Use

    This rule is not subject to Executive Order 13211, ``Actions 
Concerning Regulations That Significantly Affect Energy Supply, 
Distribution, or Use'' (66 FR 28355, May 22, 2001), because it is not 
likely to have a significant adverse effect on the supply, 
distribution, or use of energy.

J. National Technology Transfer and Advancement Act

    Section 12 of the National Technology Transfer and Advancement Act 
of 1995 requires federal agencies to evaluate existing technical 
standards when developing a new regulation. This rule does not involve 
technical standards.

K. Executive Order 12898: Federal Actions To Address Environmental 
Justice in Minority Populations and Low-Income Populations

    This final rule repealing the 2015 Rule and recodifying the pre-
2015 regulations currently in effect in those States where the 2015 
Rule is enjoined will maintain the longstanding regulatory framework 
that was in place nationwide for many years prior to the promulgation 
of the 2015 Rule. The agencies therefore believe that this action does 
not have disproportionately high and adverse human health or 
environmental effects on minority, low-income populations, and/or 
indigenous peoples, as specified in Executive Order 12898 (59 FR 7629, 
Feb. 16, 1994).

L. Congressional Review Act (``CRA'')

    This action is subject to the CRA, and the agencies will submit a 
rule report to each House of the Congress and to the Comptroller 
General of the United States. OMB has concluded that it is a ``major 
rule'' as defined by 5 U.S.C. 804(2).

List of Subjects

33 CFR Part 328

    Environmental protection, Administrative practice and procedure, 
Navigation (water), Water pollution control, Waterways.

40 CFR Part 110

    Environmental protection, Oil pollution, Reporting and 
recordkeeping requirements.

40 CFR Part 112

    Environmental protection, Oil pollution, Penalties, Reporting and 
recordkeeping requirements.

40 CFR Part 116

    Environmental protection, Hazardous substances, Reporting and 
recordkeeping requirements, Water pollution control.

40 CFR Part 117

    Environmental protection, Hazardous substances, Penalties, 
Reporting and recordkeeping requirements, Water pollution control.

40 CFR Part 122

    Environmental protection, Administrative practice and procedure, 
Confidential business information, Hazardous substances, Reporting and 
recordkeeping requirements, Water pollution control.

40 CFR Part 230

    Environmental protection, Water pollution control.

40 CFR Part 232

    Environmental protection, Intergovernmental relations, Water 
pollution control.

[[Page 56667]]

40 CFR Part 300

    Environmental protection, Air pollution control, Chemicals, 
Hazardous substances, Hazardous waste, Intergovernmental relations, 
Natural resources, Occupational safety and health, Oil pollution, 
Penalties, Reporting and recordkeeping requirements, Superfund, Water 
pollution control, Water supply.

40 CFR Part 302

    Environmental protection, Air pollution control, Chemicals, 
Hazardous substances, Hazardous waste, Intergovernmental relations, 
Natural resources, Reporting and recordkeeping requirements, Superfund, 
Water pollution control, Water supply.

40 CFR Part 401

    Environmental protection, Waste treatment and disposal, Water 
pollution control.

    Dated: September 12, 2019.
Andrew R. Wheeler,
Administrator, Environmental Protection Agency.
    Dated: September 5, 2019.
R.D. James,
Assistant Secretary of the Army (Civil Works).

Title 33--Navigation and Navigable Waters

    For the reasons set out in the preamble, title 33, chapter II of 
the Code of Federal Regulations is amended as follows:

PART 328--DEFINITION OF WATERS OF THE UNITED STATES

0
1. The authority citation for part 328 is revised to read as follows:

    Authority: 33 U.S.C. 1344.

0
2. Section 328.3 is amended by revising paragraphs (a) through (e) and 
adding paragraph (f) to read as follows:

Sec.  328.3   Definitions.

* * * * *
    (a) The term waters of the United States means
    (1) All waters which are currently used, or were used in the past, 
or may be susceptible to use in interstate or foreign commerce, 
including all waters which are subject to the ebb and flow of the tide;
    (2) All interstate waters including interstate wetlands;
    (3) All other waters such as intrastate lakes, rivers, streams 
(including intermittent streams), mudflats, sandflats, wetlands, 
sloughs, prairie potholes, wet meadows, playa lakes, or natural ponds, 
the use, degradation or destruction of which could affect interstate or 
foreign commerce including any such waters:
    (i) Which are or could be used by interstate or foreign travelers 
for recreational or other purposes; or
    (ii) From which fish or shellfish are or could be taken and sold in 
interstate or foreign commerce; or
    (iii) Which are used or could be used for industrial purpose by 
industries in interstate commerce;
    (4) All impoundments of waters otherwise defined as waters of the 
United States under the definition;
    (5) Tributaries of waters identified in paragraphs (a)(1) through 
(4) of this section;
    (6) The territorial seas;
    (7) Wetlands adjacent to waters (other than waters that are 
themselves wetlands) identified in paragraphs (a)(1) through (6) of 
this section.
    (8) Waters of the United States do not include prior converted 
cropland. Notwithstanding the determination of an area's status as 
prior converted cropland by any other Federal agency, for the purposes 
of the Clean Water Act, the final authority regarding Clean Water Act 
jurisdiction remains with EPA.
    Waste treatment systems, including treatment ponds or lagoons 
designed to meet the requirements of CWA (other than cooling ponds as 
defined in 40 CFR 423.11(m) which also meet the criteria of this 
definition) are not waters of the United States.
    (b) The term wetlands means those areas that are inundated or 
saturated by surface or ground water at a frequency and duration 
sufficient to support, and that under normal circumstances do support, 
a prevalence of vegetation typically adapted for life in saturated soil 
conditions. Wetlands generally include swamps, marshes, bogs, and 
similar areas.
    (c) The term adjacent means bordering, contiguous, or neighboring. 
Wetlands separated from other waters of the United States by man-made 
dikes or barriers, natural river berms, beach dunes and the like are 
``adjacent wetlands.''
    (d) The term high tide line means the line of intersection of the 
land with the water's surface at the maximum height reached by a rising 
tide. The high tide line may be determined, in the absence of actual 
data, by a line of oil or scum along shore objects, a more or less 
continuous deposit of fine shell or debris on the foreshore or berm, 
other physical markings or characteristics, vegetation lines, tidal 
gages, or other suitable means that delineate the general height 
reached by a rising tide. The line encompasses spring high tides and 
other high tides that occur with periodic frequency but does not 
include storm surges in which there is a departure from the normal or 
predicted reach of the tide due to the piling up of water against a 
coast by strong winds such as those accompanying a hurricane or other 
intense storm.
    (e) The term ordinary high water mark means that line on the shore 
established by the fluctuations of water and indicated by physical 
characteristics such as clear, natural line impressed on the bank, 
shelving, changes in the character of soil, destruction of terrestrial 
vegetation, the presence of litter and debris, or other appropriate 
means that consider the characteristics of the surrounding areas.
    (f) The term tidal waters means those waters that rise and fall in 
a predictable and measurable rhythm or cycle due to the gravitational 
pulls of the moon and sun. Tidal waters end where the rise and fall of 
the water surface can no longer be practically measured in a 
predictable rhythm due to masking by hydrologic, wind, or other 
effects.

Title 40--Protection of Environment

    For reasons set out in the preamble, title 40, chapter I of the 
Code of Federal Regulations is amended as follows:

PART 110--DISCHARGE OF OIL

0
3. The authority citation for part 110 is revised to read as follows:

    Authority: 33 U.S.C. 1321(b)(3) and (b)(4) and 1361(a); E.O. 
11735, 38 FR 21243, 3 CFR Parts 1971-1975 Comp., p. 793.

0
4. Section 110.1 is amended by revising the definition of ``Navigable 
waters'' and adding the definition of ``Wetlands'' in alphabetical 
order to read as follows:

Sec.  110.1  Definitions.

* * * * *
    Navigable waters means the waters of the United States, including 
the territorial seas. The term includes:
    (a) All waters that are currently used, were used in the past, or 
may be susceptible to use in interstate or foreign commerce, including 
all waters that are subject to the ebb and flow of the tide;
    (b) Interstate waters, including interstate wetlands;
    (c) All other waters such as intrastate lakes, rivers, streams 
(including intermittent streams), mudflats, sandflats, and wetlands, 
the use, degradation, or destruction of which would affect or could 
affect interstate or foreign commerce including any such waters:

[[Page 56668]]

    (1) That are or could be used by interstate or foreign travelers 
for recreational or other purposes;
    (2) From which fish or shellfish are or could be taken and sold in 
interstate or foreign commerce;
    (3) That are used or could be used for industrial purposes by 
industries in interstate commerce;
    (d) All impoundments of waters otherwise defined as navigable 
waters under this section;
    (e) Tributaries of waters identified in paragraphs (a) through (d) 
of this section, including adjacent wetlands; and
    (f) Wetlands adjacent to waters identified in paragraphs (a) 
through (e) of this section: Provided, That waste treatment systems 
(other than cooling ponds meeting the criteria of this paragraph) are 
not waters of the United States;

Navigable waters do not include prior converted cropland. 
Notwithstanding the determination of an area's status as prior 
converted cropland by any other federal agency, for the purposes of the 
Clean Water Act, the final authority regarding Clean Water Act 
jurisdiction remains with EPA.
* * * * *
    Wetlands means those areas that are inundated or saturated by 
surface or ground water at a frequency or duration sufficient to 
support, and that under normal circumstances do support, a prevalence 
of vegetation typically adapted for life in saturated soil conditions. 
Wetlands generally include playa lakes, swamps, marshes, bogs and 
similar areas such as sloughs, prairie potholes, wet meadows, prairie 
river overflows, mudflats, and natural ponds.

PART 112 --OIL POLLUTION PREVENTION

0
5. The authority citation for part 112 is revised to read as follows:

    Authority: 33 U.S.C. 1251 et seq.; 33 U.S.C. 2720; E.O. 12777 
(October 18, 1991), 3 CFR, 1991 Comp., p. 351.

0
6. Section 112.2 is amended by revising the definition of ``Navigable 
waters'' and adding the definition of ``Wetlands'' in alphabetical 
order to read as follows:

Sec.  112.2  Definitions.

* * * * *
    Navigable waters of the United States means ``navigable waters'' as 
defined in section 502(7) of the FWPCA, and includes:
    (1) All navigable waters of the United States, as defined in 
judicial decisions prior to passage of the 1972 Amendments to the FWPCA 
(Pub. L. 92-500), and tributaries of such waters;
    (2) Interstate waters;
    (3) Intrastate lakes, rivers, and streams which are utilized by 
interstate travelers for recreational or other purposes; and
    (4) Intrastate lakes, rivers, and streams from which fish or 
shellfish are taken and sold in interstate commerce.
* * * * *
    Wetlands means those areas that are inundated or saturated by 
surface or groundwater at a frequency or duration sufficient to 
support, and that under normal circumstances do support, a prevalence 
of vegetation typically adapted for life in saturated soil conditions. 
Wetlands generally include playa lakes, swamps, marshes, bogs, and 
similar areas such as sloughs, prairie potholes, wet meadows, prairie 
river overflows, mudflats, and natural ponds.
* * * * *

PART 116--DESIGNATION OF HAZARDOUS SUBSTANCES

0
7. The authority citation for part 116 is revised to read as follows:

    Authority: Secs. 311(b)(2)(A) and 501(a), Federal Water 
Pollution Control Act (33 U.S.C. 1251 et seq.).

0
8. Section 116.3 is amended by revising the definition of ``Navigable 
waters'' to read as follows:

Sec.  116.3  Definitions.

* * * * *
    Navigable waters is defined in section 502(7) of the Act to mean 
``waters of the United States, including the territorial seas,'' and 
includes, but is not limited to:
    (1) All waters which are presently used, or were used in the past, 
or may be susceptible to use as a means to transport interstate or 
foreign commerce, including all waters which are subject to the ebb and 
flow of the tide, and including adjacent wetlands; the term wetlands as 
used in this regulation shall include those areas that are inundated or 
saturated by surface or ground water at a frequency and duration 
sufficient to support, and that under normal circumstances do support, 
a prevelance of vegetation typically adapted for life in saturated soil 
conditions. Wetlands generally include swamps, marshes, bogs and 
similar areas; the term adjacent means bordering, contiguous or 
neighboring;
    (2) Tributaries of navigable waters of the United States, including 
adjacent wetlands;
    (3) Interstate waters, including wetlands; and
    (4) All other waters of the United States such as intrastate lakes, 
rivers, streams, mudflats, sandflats and wetlands, the use, degradation 
or destruction of which affect interstate commerce including, but not 
limited to:
    (i) Intrastate lakes, rivers, streams, and wetlands which are 
utilized by interstate travelers for recreational or other purposes; 
and
    (ii) Intrastate lakes, rivers, streams, and wetlands from which 
fish or shellfish are or could be taken and sold in interstate 
commerce; and
    (iii) Intrastate lakes, rivers, streams, and wetlands which are 
utilized for industrial purposes by industries in interstate commerce.

Navigable waters do not include prior converted cropland. 
Notwithstanding the determination of an area's status as prior 
converted cropland by any other federal agency, for the purposes of the 
Clean Water Act, the final authority regarding Clean Water Act 
jurisdiction remains with EPA.
* * * * *

PART 117--DETERMINATION OF REPORTABLE QUANTITIES FOR HAZARDOUS 
SUBSTANCES

0
9. The authority citation for part 117 is revised to read as follows:

    Authority: Secs. 311 and 501(a), Federal Water Pollution Control 
Act (33 U.S.C. 1251 et seq.), (``the Act'') and Executive Order 
11735, superseded by Executive Order 12777, 56 FR 54757.

0
10. Section 117.1 is amended by revising paragraph (i) to read as 
follows:

Sec.  117.1  Definitions.

* * * * *
    (i) Navigable waters means ``waters of the United States, including 
the territorial seas.'' This term includes:
    (1) All waters which are currently used, were used in the past, or 
may be susceptible to use in interstate or foreign commerce, including 
all waters which are subject to the ebb and flow of the tide;
    (2) Interstate waters, including interstate wetlands;
    (3) All other waters such as intrastate lakes, rivers, streams, 
(including intermittent streams), mudflats, sandflats, and wetlands, 
the use, degradation or destruction of which would affect or could 
affect interstate or foreign commerce including any such waters:
    (i) Which are or could be used by interstate or foreign travelers 
for recreational or other purposes;
    (ii) From which fish or shellfish are or could be taken and sold in 
interstate or foreign commerce;

[[Page 56669]]

    (iii) Which are used or could be used for industrial purposes by 
industries in interstate commerce;
    (4) All impoundments of waters otherwise defined as navigable 
waters under this paragraph;
    (5) Tributaries of waters identified in paragraphs (i)(1) through 
(4) of this section, including adjacent wetlands; and
    (6) Wetlands adjacent to waters identified in paragraphs (i)(1) 
through (5) of this section (``Wetlands'' means those areas that are 
inundated or saturated by surface or ground water at a frequency and 
duration sufficient to support, and that under normal circumstances do 
support, a prevalence of vegetation typically adapted for life in 
saturated soil conditions. Wetlands generally included playa lakes, 
swamps, marshes, bogs, and similar areas such as sloughs, prairie 
potholes, wet meadows, prairie river overflows, mudflats, and natural 
ponds): Provided, That waste treatment systems (other than cooling 
ponds meeting the criteria of this paragraph) are not waters of the 
United States.
    Navigable waters do not include prior converted cropland. 
Notwithstanding the determination of an area's status as prior 
converted cropland by any other federal agency, for the purposes of the 
Clean Water Act, the final authority regarding Clean Water Act 
jurisdiction remains with EPA.
* * * * *

PART 122--EPA ADMINISTERED PERMIT PROGRAMS: THE NATIONAL POLLUTANT 
DISCHARGE ELIMINATION SYSTEM

0
11. The authority citation for part 122 continues to read as follows:

    Authority: The Clean Water Act, 33 U.S.C. 1251 et seq.

0
12. Section 122.2 is amended by:
0
a. Lifting the suspension of the last sentence of the definition of 
``Waters of the United States'' published July 21, 1980 (45 FR 48620).
0
b. Revising the definition of ``Waters of the United States''.
0
c. Suspending the last sentence of the definition of ``Waters of the 
United States'' published July 21, 1980 (45 FR 48620).
0
d. Adding the definition of ``Wetlands''.
    The revision and addition read as follows:

Sec.  122.2   Definitions.

* * * * *
    Waters of the United States or waters of the U.S. means:
    (a) All waters which are currently used, were used in the past, or 
may be susceptible to use in interstate or foreign commerce, including 
all waters which are subject to the ebb and flow of the tide;
    (b) All interstate waters, including interstate ``wetlands;''
    (c) All other waters such as intrastate lakes, rivers, streams 
(including intermittent streams), mudflats, sandflats, ``wetlands,'' 
sloughs, prairie potholes, wet meadows, playa lakes, or natural ponds 
the use, degradation, or destruction of which would affect or could 
affect interstate or foreign commerce including any such waters:
    (1) Which are or could be used by interstate or foreign travelers 
for recreational or other purposes;
    (2) From which fish or shellfish are or could be taken and sold in 
interstate or foreign commerce; or
    (3) Which are used or could be used for industrial purposes by 
industries in interstate commerce;
    (d) All impoundments of waters otherwise defined as waters of the 
United States under this definition;
    (e) Tributaries of waters identified in paragraphs (a) through (d) 
of this definition;
    (f) The territorial sea; and
    (g) ``Wetlands'' adjacent to waters (other than waters that are 
themselves wetlands) identified in paragraphs (a) through (f) of this 
definition.

Waste treatment systems, including treatment ponds or lagoons designed 
to meet the requirements of CWA (other than cooling ponds as defined in 
40 CFR 423.11(m) which also meet the criteria of this definition) are 
not waters of the United States. This exclusion applies only to manmade 
bodies of water which neither were originally created in waters of the 
United States (such as disposal area in wetlands) nor resulted from the 
impoundment of waters of the United States. [See Note 1 of this 
section.] Waters of the United States do not include prior converted 
cropland. Notwithstanding the determination of an area's status as 
prior converted cropland by any other federal agency, for the purposes 
of the Clean Water Act, the final authority regarding Clean Water Act 
jurisdiction remains with EPA.
    Wetlands means those areas that are inundated or saturated by 
surface or groundwater at a frequency and duration sufficient to 
support, and that under normal circumstances do support, a prevalence 
of vegetation typically adapted for life in saturated soil conditions. 
Wetlands generally include swamps, marshes, bogs, and similar areas.
* * * * *

PART 230--SECTION 404(b)(1) GUIDELINES FOR SPECIFICATION OF 
DISPOSAL SITES FOR DREDGED OR FILL MATERIAL

0
13. The authority citation for part 230 is revised to read as follows:

    Authority:  Secs. 404(b) and 501(a) of the Clean Water Act of 
1977 (33 U.S.C. 1344(b) and 1361(a)).

0
14. Section 230.3 is amended by:
0
a. Redesignating paragraph (o) as paragraph (s).
0
b. Revising newly redesignated paragraph (s).
0
c. Redesignating paragraph (n) as paragraph (r).
0
d. Redesignating paragraph (m) as paragraph (q-1).
0
e. Redesignating paragraphs (h) through (l) as paragraphs (m) through 
(q).
0
f. Redesignating paragraphs (e) and (f) as paragraphs (h) and (i).
0
g. Redesignating paragraph (g) as paragraph (k).
0
h. Redesignating paragraphs (b) through (d) as paragraphs (c) through 
(e).
0
i. Adding reserved paragraphs (f), (g), (j), and (l).
0
j. Adding paragraphs (b) and (t).
    The revision and additions read as follows:

Sec.  230.3  Definitions.

* * * * *
    (b) The term adjacent means bordering, contiguous, or neighboring. 
Wetlands separated from other waters of the United States by man-made 
dikes or barriers, natural river berms, beach dunes, and the like are 
``adjacent wetlands.''
* * * * *
    (s) The term waters of the United States means:
    (1) All waters which are currently used, or were used in the past, 
or may be susceptible to use in interstate or foreign commerce, 
including all waters which are subject to the ebb and flow of the tide;
    (2) All interstate waters including interstate wetlands;
    (3) All other waters such as intrastate lakes, rivers, streams 
(including intermittent streams), mudflats, sandflats, wetlands, 
sloughs, prairie potholes, wet meadows, playa lakes, or natural ponds, 
the use, degradation or destruction of which could affect interstate or 
foreign commerce including any such waters:

[[Page 56670]]

    (i) Which are or could be used by interstate or foreign travelers 
for recreational or other purposes; or
    (ii) From which fish or shellfish are or could be taken and sold in 
interstate or foreign commerce; or
    (iii) Which are used or could be used for industrial purposes by 
industries in interstate commerce;
    (4) All impoundments of waters otherwise defined as waters of the 
United States under this definition;
    (5) Tributaries of waters identified in paragraphs (s)(1) through 
(4) of this section;
    (6) The territorial sea;
    (7) Wetlands adjacent to waters (other than waters that are 
themselves wetlands) identified in paragraphs (s)(1) through (6) of 
this section; waste treatment systems, including treatment ponds or 
lagoons designed to meet the requirements of CWA (other than cooling 
ponds as defined in 40 CFR 423.11(m) which also meet the criteria of 
this definition) are not waters of the United States.
    Waters of the United States do not include prior converted 
cropland. Notwithstanding the determination of an area's status as 
prior converted cropland by any other federal agency, for the purposes 
of the Clean Water Act, the final authority regarding Clean Water Act 
jurisdiction remains with EPA.
    (t) The term wetlands means those areas that are inundated or 
saturated by surface or ground water at a frequency and duration 
sufficient to support, and that under normal circumstances do support, 
a prevalence of vegetation typically adapted for life in saturated soil 
conditions. Wetlands generally include swamps, marshes, bogs and 
similar areas.

PART 232--404 PROGRAMS DEFINITIONS; EXEMPT ACTIVITIES NOT REQUIRING 
404 PERMITS

0
15. The authority citation for part 232 is revised to read as follows:

    Authority: 33 U.S.C. 1344.

0
16. Section 232.2 is amended by revising the definition of ``Waters of 
the United States'' and adding the definition of ``Wetlands'' to read 
as follows:

Sec.  232.2  Definitions.

* * * * *
    Waters of the United States means:
    All waters which are currently used, were used in the past, or may 
be susceptible to us in interstate or foreign commerce, including all 
waters which are subject to the ebb and flow of the tide.
    All interstate waters including interstate wetlands.
    All other waters, such as intrastate lakes, rivers, streams 
(including intermittent streams), mudflats, sandflats, wetlands, 
sloughs, prairie potholes, wet meadows, playa lakes, or natural ponds, 
the use, degradation, or destruction of which would or could affect 
interstate or foreign commerce including any such waters:
    Which are or could be used by interstate or foreign travelers for 
recreational or other purposes; or
    From which fish or shellfish are or could be taken and sold in 
interstate or foreign commerce; or
    Which are used or could be used for industrial purposes by 
industries in interstate commerce.
    All impoundments of waters otherwise defined as waters of the 
United States under this definition;
    Tributaries of waters identified in paragraphs (g)(1)-(4) of this 
section;
    The territorial sea; and
    Wetlands adjacent to waters (other than waters that are themselves 
wetlands) identified in paragraphs (q)(1)-(6) of this section.
    Waste treatment systems, including treatment ponds or lagoons 
designed to meet the requirements of the Act (other than cooling ponds 
as defined in 40 CFR 123.11(m) which also meet the criteria of this 
definition) are not waters of the United States.
    Waters of the United States do not include prior converted 
cropland. Notwithstanding the determination of an area's status as 
prior converted cropland by any other federal agency, for the purposes 
of the Clean Water Act, the final authority regarding Clean Water Act 
jurisdiction remains with EPA.
    Wetlands means those areas that are inundated or saturated by 
surface or ground water at a frequency and duration sufficient to 
support, and that under normal circumstances do support, a prevalence 
of vegetation typically adapted for life in saturated soil conditions. 
Wetlands generally include swamps, marshes, bogs, and similar areas.

PART 300--NATIONAL OIL AND HAZARDOUS SUBSTANCES POLLUTION 
CONTINGENCY PLAN

0
17. The authority citation for part 300 is revised to read as follows:

    Authority:  33 U.S.C. 1321(c)(2); 42 U.S.C. 9601-9657; E.O. 
13626, 77 FR 56749, 3 CFR, 2013 Comp., p.306; E.O. 12777, 56 FR 
54757, 3 CFR, 1991 Comp., p.351; E.O. 12580, 52 FR 2923, 3 CFR, 1987 
Comp., p.193.

0
18. Section 300.5 is amended by revising the definition of ``Navigable 
waters'' to read as follows:

Sec.  300.5  Definitions.

* * * * *
    Navigable waters as defined by 40 CFR 110.1, means the waters of 
the United States, including the territorial seas. The term includes:
    (1) All waters that are currently used, were used in the past, or 
may be susceptible to use in interstate or foreign commerce, including 
all waters that are subject to the ebb and flow of the tide;
    (2) Interstate waters, including interstate wetlands;
    (3) All other waters such as intrastate lakes, rivers, streams 
(including intermittent streams), mudflats, sandflats, and wetlands, 
the use, degradation, or destruction of which would affect or could 
affect interstate or foreign commerce including any such waters;
    (i) That are or could be used by interstate or foreign travelers 
for recreational or other purposes;
    (ii) From which fish or shellfish are or could be taken and sold in 
interstate or foreign commerce;
    (iii) That are used or could be used for industrial purposes by 
industries in interstate commerce;
    (4) All impoundments of waters otherwise defined as navigable 
waters under this section;
    (5) Tributaries of waters identified in paragraphs (a) through (d) 
of this definition, including adjacent wetlands; and
    (6) Wetlands adjacent to waters identified in paragraphs (a) 
through (e) of this definition: Provided, that waste treatment systems 
(other than cooling ponds meeting the criteria of this paragraph) are 
not waters of the United States.
    (7) Waters of the United States do not include prior converted 
cropland. Notwithstanding the determination of an area's status as 
prior converted cropland by any other federal agency, for the purposes 
of the Clean Water Act, the final authority regarding Clean Water Act 
jurisdiction remains with EPA.
* * * * *

0
19. In appendix E to part 300, section 1.5 is amended by revising the 
definition of ``Navigable waters'' to read as follows:

Appendix E to Part 300--Oil Spill Response

* * * * *

[[Page 56671]]

1.5 Definitions. * * *

    Navigable waters as defined by 40 CFR 110.1 means the waters of the 
United States, including the territorial seas. The term includes:
    (a) All waters that are currently used, were used in the past, or 
may be susceptible to use in interstate or foreign commerce, including 
all waters that are subject to the ebb and flow of the tide;
    (b) Interstate waters, including interstate wetlands;
    (c) All other waters such as intrastate lakes, rivers, streams 
(including intermittent streams), mudflats, sandflats, and wetlands, 
the use, degradation, or destruction of which would affect or could 
affect interstate or foreign commerce including any such waters:
    (1) That are or could be used by interstate or foreign travelers 
for recreational or other purposes;
    (2) From which fish or shellfish are or could be taken and sold in 
interstate or foreign commerce; and
    (3) That are used or could be used for industrial purposes by 
industries in interstate commerce.
    (d) All impoundments of waters otherwise defined as navigable 
waters under this section;
    (e) Tributaries of waters identified in paragraphs (a) through (d) 
of this definition, including adjacent wetlands; and
    (f) Wetlands adjacent to waters identified in paragraphs (a) 
through (e) of this definition: Provided, that waste treatment systems 
(other than cooling ponds meeting the criteria of this paragraph) are 
not waters of the United States.
    (g) Waters of the United States do not include prior converted 
cropland. Notwithstanding the determination of an area's status as 
prior converted cropland by any other federal agency, for the purposes 
of the Clean Water Act, the final authority regarding Clean Water Act 
jurisdiction remains with EPA.
* * * * *

PART 302--DESIGNATION, REPORTABLE QUANTITIES, AND NOTIFICATION

0
20. The authority citation for part 302 continues to read as follows:

    Authority: 42 U.S.C. 9602, 9603, and 9604; 33 U.S.C. 1321 and 
1361.

0
21. Section 302.3 is amended by revising the definition of ``Navigable 
waters'' to read as follows:

Sec.  302.3  Definitions.

* * * * *
    Navigable waters or navigable waters of the United States means 
waters of the United States, including the territorial seas;
* * * * *

PART 401--GENERAL PROVISIONS

0
22. The authority citation for part 401 is revised to read as follows:

    Authority: Secs. 301, 304 (b) and (c), 306 (b) and (c), 307 (b) 
and (c) and 316(b) of the Federal Water Pollution Control Act, as 
amended (the ``Act''), 33 U.S.C. 1251, 1311, 1314 (b) and (c), 1316 
(b) and (c), 1317 (b) and (c) and 1326(c); 86 Stat. 816 et seq.; 
Pub. L. 92-500.

0
23. Section 401.11 is amended by revising paragraph (l) to read as 
follows:

Sec.  401.11   General definitions.

* * * * *
    (l) The term navigable waters includes: All navigable waters of the 
United States; tributaries of navigable waters of the United States; 
interstate waters; intrastate lakes, rivers, and streams which are 
utilized by interstate travelers for recreational or other purposes; 
intrastate lakes, rivers, and streams from which fish or shellfish are 
taken and sold in interstate commerce; and intrastate lakes, rivers, 
and streams which are utilized for industrial purposes by industries in 
interstate commerce. Navigable waters do not include prior converted 
cropland. Notwithstanding the determination of an area's status as 
prior converted cropland by any other federal agency, for the purposes 
of the Clean Water Act, the final authority regarding Clean Water Act 
jurisdiction remains with EPA.
* * * * *
[FR Doc. 2019-20550 Filed 10-21-19; 8:45 am]
 BILLING CODE 6560-50-P