1 

DRAFT DECISION DOCUMENT 

NATIONWIDE PERMIT B

This document discusses the factors considered by the Corps of Engineers (Corps) during 

the issuance process for this Nationwide Permit (NWP). This document contains: (1) the 

public interest review required by Corps regulations at 33 CFR 320.4(a)(1) and (2); (2) a 

discussion of the environmental considerations necessary to comply with the National 

Environmental Policy Act; and (3) the impact analysis specified in Subparts C through F of 

the 404(b)(1) Guidelines (40 CFR Part 230). This evaluation of the NWP includes a 

discussion of compliance with applicable laws, consideration of public comments, an 

alternatives analysis, and a general assessment of individual and cumulative impacts, 

including the general potential effects on each of the public interest factors specified at 33 

CFR 320.4(a). 

1.0 Text of the Nationwide Permit 

Water-Based Renewable Energy Generation Pilot Projects. Structures and work in navigable 

waters of the United States and discharges of dredged or fill material into waters of the 

United States for the construction, expansion, or modification of water-based wind or 

hydrokinetic renewable energy generation pilot projects and their attendant features. 

Attendant features may include, but are not limited to, land-based distribution facilities, 

roads, parking lots, stormwater management facilities, utility lines, including utility lines to 

transfer the energy to land-based distribution facilities. 

The discharge must not cause the loss of greater than 1/2-acre of waters of the United States, 

including the loss of no more than 300 linear feet of stream bed, unless for intermittent and 

ephemeral stream beds the district engineer waives the 300 linear foot limit by making a 

written determination concluding that the discharge will result in minimal adverse effects. 

For each single and complete project, no more than 10 units are authorized. 

This NWP does not authorize activities in coral reefs. 

Structures in an anchorage area established by the U.S. Coast Guard must comply with the 

requirements in 33 CFR part 322.5(l)(2). 

Structures may not be placed in established danger zones or restricted areas as designated in 

33 CFR part 334, shipping safety fairways or traffic separation schemes established by the 

U.S. Coast Guard (see 33 CFR part 322.5(l)(1)), or EPA or Corps designated open water 

dredged material disposal areas. 

Notification: The permittee must submit a pre-construction notification to the district 

engineer prior to commencing the activity. (See general condition 30.) (Sections 10 and 

404) 
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Note 1: An activity that is located on an existing locally or federally maintained U.S. Army 

Corps of Engineers project requires separate approval from the Chief of Engineers under 33 

U.S.C. 408. 

Note 2: Copies of the NWP verification will be sent by the Corps to the National Oceanic 

and Atmospheric Administration (NOAA), National Ocean Service (NOS), for charting the 

project and associated utility line(s) to protect navigation. 

1.1 Requirements 

General conditions of the NWPs are in the Federal Register notice announcing the issuance 

of this NWP. Pre-construction notification requirements, additional conditions, limitations, 

and restrictions are in 33 CFR part 330. 

1.2 Statutory Authority 

 Section 10 of the Rivers and Harbors Act of 1899 (33 U.S.C. 403) 

 Section 404 of the Clean Water Act (33 U.S.C. 1344) 

1.3 Compliance with Related Laws (33 CFR 320.3) 

1.3.1 General 

NWPs are a type of general permit designed to authorize certain activities that have minimal 

adverse effects on the aquatic environment and generally comply with the related laws cited 

in 33 CFR 320.3. Activities that result in more than minimal adverse effects on the aquatic 

environment, individually or cumulatively, cannot be authorized by NWPs. Individual 

review of each activity authorized by an NWP will not normally be performed, except when 

preconstruction notification to the Corps is required or when an applicant requests 

verification that an activity complies with an NWP. Potential adverse impacts and 

compliance with the laws cited in 33 CFR 320.3 are controlled by the terms and conditions 

of each NWP, regional and case-specific conditions, and the review process that is 

undertaken prior to the issuance of NWPs. 

The evaluation of this NWP, and related documentation, considers compliance with each of 

the following laws, where applicable: Sections 401, 402, and 404 of the Clean Water Act; 

Section 307(c) of the Coastal Zone Management Act of 1972, as amended; Section 302 of 

the Marine Protection, Research and Sanctuaries Act of 1972, as amended; the National 

Environmental Policy Act of 1969; the Fish and Wildlife Act of 1956; the Migratory Marine 

Game-Fish Act; the Fish and Wildlife Coordination Act, the Federal Power Act of 1920, as 

amended; the National Historic Preservation Act of 1966; the Interstate Land Sales Full 

Disclosure Act; the Endangered Species Act; the Deepwater Port Act of 1974; the Marine 

Mammal Protection Act of 1972; Section 7(a) of the Wild and Scenic Rivers Act; the Ocean 

Thermal Energy Act of 1980; the National Fishing Enhancement Act of 1984; the 

Magnuson-Stevens Fishery and Conservation and Management Act, the Bald and Golden 

Eagle Protection Act; and the Migratory Bird Treaty Act. In addition, compliance of the 
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NWP with other Federal requirements, such as Executive Orders and Federal regulations 

addressing issues such as floodplains, essential fish habitat, and critical resource waters is 

considered. 

1.3.2 Terms and Conditions 

Many NWPs have notification requirements that trigger case-by-case review of certain 

activities. Two NWP general conditions require case-by-case review of all activities that 

may adversely affect Federally-listed endangered or threatened species or historic properties 

(i.e., general conditions 19 and 20). General condition 17 restricts the use of NWPs for 

activities that are located in Federally-designated wild and scenic rivers. None of the NWPs 

authorize artificial reefs. General condition 27 prohibits the use of an NWP with other 

NWPs, except when the acreage loss of waters of the United States does not exceed the 

highest specified acreage limit of the NWPs used to authorize the single and complete 

project. 

In some cases, activities authorized by an NWP may require other federal, state, or local 

authorizations. Examples of such cases include, but are not limited to: activities that are in 

marine sanctuaries or affect marine sanctuaries or marine mammals; the ownership, 

construction, location, and operation of ocean thermal conversion facilities or deep water 

ports beyond the territorial seas; activities that result in discharges of dredged or fill material 

into waters of the United States and require Clean Water Act Section 401 water quality 

certification; or activities in a state operating under a coastal zone management program 

approved by the Secretary of Commerce under the Coastal Zone Management Act. In such 

cases, a provision of the NWPs states that an NWP does not obviate the need to obtain other 

authorizations required by law. [33 CFR 330.4(b)(2)] 

Additional safeguards include provisions that allow the Chief of Engineers, division 

engineers, and/or district engineers to: assert discretionary authority and require an 

individual permit for a specific activity; modify NWPs for specific activities by adding 

special conditions on a case-by-case basis; add conditions on a regional or nationwide basis 

to certain NWPs; or take action to suspend or revoke an NWP or NWP authorization for 

activities within a region or state. Regional conditions are imposed to protect important 

regional concerns and resources. [33 CFR 330.4(e) and 330.5] 

1.3.3 Review Process 

The analyses in this document and the coordination that was undertaken prior to the 

issuance of the NWP fulfill the requirements of the National Environmental Policy Act 

(NEPA), the Fish and Wildlife Coordination Act, and other acts promulgated to protect the 

quality of the environment. 

All NWPs that authorize activities which may result in discharges of dredged or fill material 

into waters of the United States require water quality certification. NWPs that authorize 

activities within, or affecting land or water uses within a state that has a Federally-approved 

coastal zone management program, must also be certified as consistent with the state’s 
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program. The procedures to ensure that the NWPs comply with these laws are described in 

33 CFR 330.4(c) and (d), respectively. 

1.4 Public Comment and Response 

For a summary of the public comments received in response to the February 16, 2011, 

Federal Register notice, refer to the preamble in the Federal Register notice announcing the 

reissuance of this NWP. The substantive comments received in response to the February 16, 

2011, Federal Register notice were used to improve the NWP by changing NWP terms and 

limits, notification requirements, and/or NWP general conditions, as necessary. 

[This section to be completed for the final NWP.] 

2.0 Alternatives 

This evaluation includes an analysis of alternatives based on the requirements of NEPA, 

which requires a more expansive review than the Clean Water Act Section 404(b)(1) 

Guidelines. The alternatives discussed below are based on an analysis of the potential 

environmental impacts and impacts to the Corps, Federal, Tribal, and state resource 

agencies, general public, and prospective permittees. Since the consideration of off-site 

alternatives under the 404(b)(1) Guidelines does not apply to specific projects authorized by 

general permits, the alternatives analysis discussed below consists of a general NEPA 

alternatives analysis for the NWP. 

2.1 No Action Alternative (No Nationwide Permit) 

The no action alternative would not achieve one of the goals of the Corps Nationwide 

Permit Program, which is to reduce the regulatory burden on applicants for activities that 

result in minimal adverse effects on the aquatic environment, individually or cumulatively. 

The no action alternative would also reduce the Corps ability to pursue the current level of 

review for other activities that have greater adverse effects on the aquatic environment, 

including activities that require individual permits as a result of the Corps exercising its 

discretionary authority under the NWP program. The no action alternative would also 

reduce the Corps ability to conduct compliance actions. 

If this NWP is not available, substantial additional resources would be required for the 

Corps to evaluate these minor activities through the individual permit process, and for the 

public and Federal, Tribal, and state resource agencies to review and comment on the large 

number of public notices for these activities. In a considerable majority of cases, when the 

Corps publishes public notices for proposed activities that result in minimal adverse effects 

on the aquatic environment, the Corps typically does not receive responses to these public 

notices from either the public or Federal, Tribal, and state resource agencies. Another 

important benefit of the NWP program that would not be achieved through the no action 

alternative is the incentive for project proponents to design their projects so that those 

activities meet the terms and conditions of an NWP. The Corps believes the NWPs have 

significantly reduced adverse effects to the aquatic environment because most applicants 
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modify their projects to comply with the NWPs and avoid the delays and costs typically 

associated with the individual permit process. 

In the absence of this NWP, Department of the Army (DA) authorization in the form of 

another general permit (i.e., regional or programmatic general permits, where available) or 

individual permits would be required. Corps district offices may develop regional general 

permits if an NWP is not available, but this is an impractical and inefficient method for 

activities with minimal individual or cumulative adverse effects on the aquatic environment 

that are conducted across the Nation. Not all districts would develop these regional general 

permits for a variety of reasons. The regulated public, especially those companies that 

conduct work in more than one Corps district, would be adversely affected by the 

widespread use of regional general permits because of the greater potential for lack of 

consistency and predictability in the authorization of similar activities with minimal adverse 

effects on the aquatic environment. These companies would incur greater costs in their 

efforts to comply with different regional general permit requirements between Corps 

districts. Nevertheless, in some states Corps districts have issued programmatic general 

permits to take the place of this and other NWPs. However, this approach only works in 

states with regulatory programs comparable to the Corps Regulatory Program. 

2.2 National Modification Alternatives 

Since the Corps Nationwide Permit program began in 1977, the Corps has continuously 

strived to develop NWPs that authorize activities that result only in minimal adverse effects 

on the aquatic environment, individually or cumulatively. Every five years the Corps 

reevaluates the NWPs during the reissuance process, and may modify an NWP to address 

concerns for the aquatic environment. Utilizing collected data and institutional knowledge 

concerning activities authorized by the Corps Regulatory Program, the Corps reevaluates the 

potential impacts of activities authorized by NWPs. The Corps also uses substantive public 

comments on proposed NWPs to assess the expected impacts. This NWP was developed to 

authorize water-based renewable energy generation pilot projects that have minimal adverse 

effects on the aquatic environment. The Corps has considered suggested changes to the 

terms and conditions of this NWP, as well as modifying or adding NWP general conditions, 

as discussed in the preamble of the Federal Register notice announcing the proposed 

reissuance of this NWP. 

In the February 16, 2011, Federal Register notice, the Corps requested comments on the 

proposed issuance of this NWP. 

2.3 Regional Modification Alternatives 

An important aspect for the NWPs is the emphasis on regional conditions to address 

differences in aquatic resource functions, services, and values across the nation. All Corps 

divisions and districts are expected to add regional conditions to the NWPs to enhance 

protection of the aquatic environment and address local concerns. Division engineers can 

also revoke an NWP if the use of that NWP results in more than minimal adverse effects on 

the aquatic environment, especially in high value or unique wetlands and other waters. 
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Corps divisions and districts also monitor and analyze the cumulative adverse effects of the 

NWPs, and if warranted, further restrict or prohibit the use of the NWPs to ensure that the 

NWPs do not authorize activities that result in more than minimal adverse effects on the 

aquatic environment. To the extent practicable, division and district engineers will use 

regulatory automated information systems and institutional knowledge about the typical 

adverse effects of activities authorized by NWPs, as well as substantive public comments, to 

assess the individual and cumulative adverse effects on the aquatic environment resulting 

from regulated activities. 

2.4 Case-specific On-site Alternatives 

Although the terms and conditions for this NWP have been established at the national level 

to authorize most activities that have minimal adverse effects on the aquatic environment, 

division and district engineers have the authority to impose case-specific special conditions 

on an NWP authorization to ensure that the authorized work will result in minimal adverse 

effects. 

General condition 22 requires the permittee to minimize and avoid impacts to waters of the 

United States to the maximum extent practicable on the project site. Off-site alternatives 

cannot be considered for activities authorized by NWPs. During the evaluation of a preconstruction notification, the district engineer may determine that additional avoidance and 

minimization is practicable. The district engineer may also condition the NWP 

authorization to require compensatory mitigation to offset losses of waters of the United 

States and ensure that the net adverse effects on the aquatic environment are minimal. As 

another example, the NWP authorization can be conditioned to prohibit the permittee from 

conducting the work during specific times of the year to protect spawning fish and shellfish. 

 If the proposed work will result in more than minimal adverse effects on the aquatic 

environment, then the district engineer will exercise discretionary authority and require an 

individual permit. Discretionary authority can be asserted where there are concerns for the 

aquatic environment, including high value aquatic habitats. The individual permit review 

process requires a project-specific alternatives analysis, including the consideration of offsite alternatives, and a public interest review. 

3.0 Affected Environment 

The affected environment consists of terrestrial and aquatic ecosystems. The total land area 

in the contiguous United States is approximately 1,930,000,000 acres (Dahl 2006). Alaska 

is 366,050,000 acres in size and Hawaii is 4,110,720 acres in size (source: 

http://www.usgs.gov/state/ , accessed July 25, 2005). Terrestrial ecosystems comprise more 

than 93 percent of the contiguous United States and aquatic ecosystems make up the 

remainder (Dahl 2006). In the contiguous United States, approximately 67 percent of the 

land is privately owned, 31 percent is held by the United States government, and two 

percent is owned by state or local governments (Dale et al. 2000). Developed non-federal 

lands comprise 4.4 percent of the total land area of the contiguous United States (Dale et al. 
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2000). 

The Federal Geographic Data Committee has established the Cowardin system developed by 

the U.S. Fish and Wildlife Service (USFWS) (Cowardin et al. 1979) as the national standard 

for wetland mapping, monitoring, and data reporting (Dahl 2006) (see also 

http://www.fgdc.gov/standards/projects/FGDC-standards-projects/wetlands/fgdc-announce , 

accessed April 3, 2006). The Cowardin system is a hierarchical system which describes 

various wetland and deepwater habitats, using structural characteristics such as vegetation, 

substrate, and water regime as defining characteristics. Wetlands are defined by vegetation 

type, soils, and flooding frequency. Deepwater habitats are permanently flooded areas 

located below the wetland boundary. In rivers and lakes, deepwater habitats are usually 

more than two meters deep. 

There are five major systems in the Cowardin classification scheme: marine, estuarine, 

riverine, lacustrine, and palustrine (Cowardin et al. 1979). The marine system consists of 

open ocean on the continental shelf and its high energy coastline. The estuarine system 

consists of tidal deepwater habitats and adjacent tidal wetlands that are usually partially 

enclosed by land, but may have open connections to open ocean waters. The riverine 

system generally consists of all wetland and deepwater habitats located within a river 

channel. The lacustrine system generally consists of wetland and deepwater habitats located 

within a topographic depression or dammed river channel, with a total area greater than 20 

acres. The palustrine system generally includes all non-tidal wetlands and wetlands located 

in tidal areas with salinities less than 0.5 parts per thousand; it also includes ponds less than 

20 acres in size. Approximately 95 percent of wetlands in the conterminous United States 

are freshwater wetlands, and the remaining 5 percent are estuarine or marine wetlands (Dahl 

2006). 

The Emergency Wetlands Resources Act of 1986 (Public Law 99-645) requires the USFWS 

to submit wetland status and trends reports to Congress (Dahl 2006). The latest status and 

trends report, which covers the period of 1998 to 2004, is summarized in Table 3.1. 
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Table 3.1. Estimated aquatic resource acreages in the conterminous United States in 

2004 (Dahl 2006). 

Aquatic Habitat Category 

Estimated Area 

in 2004 

(acres) 

Marine 128,600 

Estuarine intertidal non-vegetated 600,000 

Estuarine intertidal vegetated 4,571,700 

All intertidal waters and wetlands 5,300,300 

Palustrine non-vegetated 6,633,900 

Palustrine vegetated 95,819,800 

 Palustrine emergent wetlands 26,147,000 

 Palustrine forested wetlands 52,031,400 

 Palustrine shrub wetlands 17,641,400 

All palustrine aquatic habitats 102,453,700 

Lacustrine deepwater habitats 16,773,400 

Riverine deepwater habitats 6,813,300 

Estuarine subtidal habitats 17,717,800 

All aquatic habitats 149,058,500 

The acreage of lacustrine deepwater habitats does not include the open waters of Great 

Lakes (Dahl 2006). 

According to Hall et al. (1994), there are more than 204 million acres of wetlands and 

deepwater habitats in the State of Alaska, including approximately 174.7 million acres of 

wetlands. Wetlands and deepwater habitats comprise approximately 50.7 percent of the 

surface area in Alaska (Hall et al. 1994). 

The National Resources Inventory (NRI) is a statistical survey conducted by the Natural 

Resources Conservation Service (NRCS) (2009) of natural resources on non-federal land in 

the United States. The NRCS defines non-federal land as privately owned lands, tribal and 

trust lands, and lands under the control of local and State governments. The land use 

determined by 2007 NRI is summarized in Table 3.2. The 2007 NRI estimates that there are 

110,671,500 acres of palustrine and estuarine wetlands on non-Federal land and water areas 

in the United States (NRCS 2009). The 2007 NRI estimates that there are 48,471,100 acres 

of open waters on non-Federal land in the United States, including lacustrine, riverine, and 

marine habitats, as well as estuarine deepwater habitats. 
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Table 3.2. The 2007 National Resources Inventory acreages for palustrine and 

estuarine wetlands on non-federal land, by land cover/use category (NRCS 

2009). 

National Resources Inventory Land Cover/Use Category 

Area of Palustrine and 

Estuarine Wetlands 

(acres) 

cropland, pastureland, and Conservation Reserve Program 

land 16,790,300 

forest land 66,043,100 

rangeland 7,940,300 

other rural land 14,744,800 

developed land 1,571,900 

water area 3,581,100 

Total 110,671,500 

The land cover/use categories used by the 2007 NRI are defined below (NRCS 2009). 

Croplands are areas used to produce crops adapted for harvest. Pastureland is land managed 

for livestock grazing, through the production of introduced forage plants. Conservation 

Reserve Program land is under a Conservation Reserve Program contract. Forest land is 

comprised of at least 10 percent single stem woody plant species that will be at least 13 feet 

tall at maturity. Rangeland is land on which plant cover consists mostly of native grasses, 

herbaceous plants, or shrubs suitable for grazing or browsing, and introduced forage plant 

species. Other rural land consists of farmsteads and other farm structures, field windbreaks, 

marshland, and barren land. Developed land is comprised of large urban and built-up areas 

(i.e., urban and built-up areas 10 acres or more in size), small built-up areas (i.e., developed 

lands 0.25 to 10 acres in size) , and rural transportation land (e.g., roads, railroads, and 

associated rights-of-way outside urban and built-up areas). Water areas are comprised of 

waterbodies and streams that are permanent open waters. 

Leopold, Wolman, and Miller (1964) estimated that there are approximately 3,250,000 miles 

of river and stream channels in the United States. This estimate is based on an analysis of 

1:24,000 scale topographic maps, by stream order. This estimate does not include many 

small streams. Many small streams are not mapped on 1:24,000 scale U.S. Geological 

Survey topographic maps (Leopold 1994) or included in other analyses (Meyer and Wallace 

2001). In a study of stream mapping in the southeastern United States, only 20% of the 

stream network was mapped on 1:24,000 scale topographic maps, and nearly none of the 

observed intermittent or ephemeral streams were indicated on those maps (Hansen 2001). 

For a 1:24,000 scale topographic map, the smallest tributary found by using 10-foot contour 

interval has drainage area of 0.7 square mile and length of 1,500 feet, and smaller channels 

are common throughout the United States (Leopold 1994). Due to the difficulty in mapping 

small streams, there are no accurate estimates of the total number of river or stream miles in 

the conterminous United States that may be classified as “waters of the United States.” 
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The USFWS status and trends study does not assess the condition or quality of wetlands and 

deepwater habitats (Dahl 2006). The Nation’s aquatic resource base is underestimated by 

the USFWS status and trends study, the National Wetland Inventory (NWI), and studies that 

estimate the length or number of stream channels within watersheds (see above). The 2006 

status and trends study does not include Alaska and Hawaii. The underestimate by the status 

and trends study and the NWI results from the minimum size of wetlands detected through 

remote sensing techniques and the difficulty of identifying certain wetland types through 

those remote sensing techniques. The NWI maps do not show small or linear wetlands 

(Tiner 1997) that may be directly impacted by activities authorized by NWPs. For the latest 

USFWS status and trends study, most of the wetlands identified are larger than 2.5 acres, but 

the minimum size of detectable wetland varies by wetland type (Dahl 2006). Some wetland 

types less than one acre in size can be identified; the smallest wetland detected for the most 

recent status and trends report was 0.005 acre (Dahl 2006). Because of the limitations of 

remote sensing techniques, certain wetland types are not included in the USFWS status and 

trends study: seagrass beds, submerged aquatic vegetation, submerged reefs, certain types of 

forested wetlands, and emergent wetlands along the Pacific coast (Dahl 2006). Therefore, 

activities authorized by NWPs will adversely affect a smaller proportion of the Nation’s 

wetland base than indicated by the wetlands acreage estimates provided in the most recent 

status and trends report, or the NWI maps for a particular region. 

Not all of the Nation’s aquatic resources are subject to regulatory jurisdiction under Section 

404 of the Clean Water Act. Waters of the United States subject to Section 404 of the Clean 

Water Act are defined at 33 CFR part 328. Some wetlands are not subject to Clean Water 

Act jurisdiction because they do not meet the criteria at Part 328. In its decision in Solid 

Waste County of Northern Cook County v. U.S. Army Corps of Engineers, 531 U.S. 159 

(2001), the U.S. Supreme Court ruled that Clean Water Act jurisdiction does not apply to 

isolated, intrastate, non-navigable waters based on their use as habitat for migratory birds. 

Tiner (2003) estimated that in some areas of the country, the proportion of wetlands that are 

geographically isolated, and may not be subject to Clean Water Act jurisdiction is 

approximately 20 to 50 percent of the wetland area, and there are other areas where more 

than 50 percent of the wetlands are geographically isolated. Geographically isolated 

wetlands comprise a substantial proportion of the wetlands found in regions with arid, semiarid, and semi-humid climates, as well as areas with karst topography (Tiner 2003). 

However, it is difficult to determine from maps or aerial photographs whether wetlands are 

hydrologically isolated from other waters, because there may be small surface hydrologic 

connections that are not included on those maps or detected by those photographs (Tiner 

2003). The scope of waters subject to Clean Water Act jurisdiction has also been affected by 

the U.S. Supreme Court decision in the consolidated cases of Rapanos v. U.S. and Carabell 

v. U.S., but there have been no formal studies to estimate the proportion of wetlands, 

streams, and other aquatic resources that may have been affected by that decision. 

This NWP authorizes discharges of dredged or fill material into non-tidal waters of the 

United States, but it does not authorize discharges of dredged or fill material into non-tidal 

wetlands adjacent to tidal waters. These waters are included in the palustrine, lacustrine, and 

riverine systems of the Cowardin classification system. 
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Wetland functions are the biophysical processes that occur within a wetland (King et al. 

2000). Wetlands provide many functions, such as habitat for fish and shellfish, habitat for 

waterfowl and other wildlife, habitat for rare and endangered species, food production, plant 

production, flood conveyance, flood-peak reduction, flood storage, shoreline stabilization, 

water supply, ground water recharge, pollutant removal, sediment accretion, and nutrient 

uptake (NRC 1992). 

Functions provided by streams include sediment transport, water transport, transport of 

nutrients and detritus, habitat for many species of plants and animals (including endangered 

or threatened species), and maintenance of biodiversity (NRC 1992). Streams also provide 

hydrologic functions, nutrient cycling functions, food web support, and corridors for 

movement of aquatic organisms (Allan and Castillo 2007). 

Freshwater ecosystems provide services such as water for drinking, household uses, 

manufacturing, thermoelectric power generation, irrigation, and aquaculture; production of 

finfish, waterfowl, and shellfish; and non-extractive services, such as flood control, 

transportation, recreation (e.g., swimming and boating), pollution dilution, hydroelectric 

generation, wildlife habitat, soil fertilization, and enhancement of property values (Postel 

and Carpenter 1997). 

Marine ecosystems provide a number of ecosystem services, including fish production; 

materials cycling (e.g., nitrogen, carbon, oxygen, phosphorous, and sulfur); transformation, 

detoxification, and sequestration of pollutants and wastes produced by humans; support of 

ocean-based recreation, tourism, and retirement industries; and coastal land development 

and valuation, including aesthetics related to living near the ocean (Peterson and Lubchenco 

1997). 

Activities authorized by this NWP will provide goods and services that are valued by 

society. Water-based renewable energy pilot projects will help identify areas that may be 

productive sources of renewable energy. Renewable energy can be used to support the 

production of goods and services, as well as providing energy to local residents. 

4.0 Environmental Consequences 

4.1 General Evaluation Criteria 

This document contains a general assessment of the foreseeable effects of the individual 

activities authorized by this NWP and the anticipated cumulative effects of those activities. 

In the assessment of these individual and cumulative effects, the terms and limits of the 

NWP, notification requirements, and the standard NWP general conditions are considered. 

The supplementary documentation provided by division engineers will address how regional 

conditions affect the individual and cumulative effects of the NWP. 

The following evaluation comprises the NEPA analysis, the public interest review specified 

in 33 CFR 320.4(a)(1) and (2), and the impact analysis specified in Subparts C through F of 
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the 404(b)(1) Guidelines (40 CFR Part 230). 

The issuance of an NWP is based on a general assessment of the effects on public interest 

and environmental factors that are likely to occur as a result of using this NWP to authorize 

activities in waters of the United States. As such, this assessment must be speculative or 

predictive in general terms. Since NWPs authorize activities across the nation, projects 

eligible for NWP authorization may be constructed in a wide variety of environmental 

settings. Therefore, it is difficult to predict all of the indirect impacts that may be associated 

with each activity authorized by an NWP. For example, the NWP that authorizes 25 cubic 

yard discharges of dredged or fill material into waters of the United States may be used to 

fulfill a variety of project purposes. Indication that a factor is not relevant to a particular 

NWP does not necessarily mean that the NWP would never have an effect on that factor, but 

that it is a factor not readily identified with the authorized activity. Factors may be relevant, 

but the adverse effects on the aquatic environment are negligible, such as the impacts of a 

boat ramp on water level fluctuations or flood hazards. Only the reasonably foreseeable 

direct or indirect effects are included in the environmental assessment for this NWP. 

Division and district engineers will impose, as necessary, additional conditions on the NWP 

authorization or exercise discretionary authority to address locally important factors or to 

ensure that the authorized activity results in no more than minimal individual and 

cumulative adverse effects on the aquatic environment. In any case, adverse effects will be 

controlled by the terms, conditions, and additional provisions of the NWP. For example, 

Section 7 Endangered Species Act consultation will be required for activities that may affect 

endangered or threatened species or critical habitat. 

4.2 Impact Analysis 

This NWP authorizes discharges of dredged or fill material into waters of the United States, 

as well as structures or work in navigable waters of the United States, for water-based 

renewable energy generation pilot projects. The acreage limit for this NWP is 1/2 acre. This 

NWP also limits the loss of stream bed to no more than 300 linear feet, unless for 

intermittent and ephemeral stream beds the district engineer waives the 300 linear foot limit 

by making a written determination that the discharge will result in minimal adverse effects. 

Pre-construction notification is required for all activities authorized by this NWP. The preconstruction notification requirement allows district engineers to review proposed activities 

on a case-by-case basis to ensure that the adverse effects of those activities on the aquatic 

environment are minimal. If the district engineer determines that the adverse effects of a 

particular project are more than minimal after considering mitigation, then discretionary 

authority will be asserted and the applicant will be notified that another form of DA 

authorization, such as a regional general permit or individual permit, is required (see 33 

CFR 330.4(e) and 330.5). 

Additional conditions can be placed on proposed activities on a regional or case-by-case 

basis to ensure that the work has minimal adverse effects on the aquatic environment. 

Regional conditioning of this NWP will be used to account for differences in aquatic 

resource functions, services, and values across the country, ensure that the NWP authorizes 
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only those activities with minimal individual or cumulative adverse effects on the aquatic 

environment, and allow each Corps district to prioritize its workload based on where its 

efforts will best serve to protect the aquatic environment. Regional conditions can prohibit 

the use of an NWP in certain waters (e.g., high value waters or specific types of wetlands or 

waters), lower notification thresholds, or require notification for all work in certain 

watersheds or types of waters. Specific NWPs can also be revoked on a geographic or 

watershed basis where the adverse effects resulting from the use of those NWPs are more 

than minimal. 

In high value waters, division and district engineers can: 1) prohibit the use of the NWP in 

those waters and require an individual permit or regional general permit; 2) decrease the 

acreage limit for the NWP; 3) add regional conditions to the NWP to ensure that the adverse 

environmental effects are minimal; or 4) for those activities that require notification, add 

special conditions to NWP authorizations, such as compensatory mitigation requirements, to 

ensure that the adverse effects on the aquatic environment are minimal. NWPs can 

authorize activities in high value waters as long as the individual and cumulative adverse 

effects on the aquatic environment are minimal. 

The construction and use of fills for temporary access for construction may be authorized by 

NWP 33 or regional general permits issued by division or district engineers. The related 

work must meet the terms and conditions of the specified permit(s). If the discharge is 

dependent on portions of a larger project that require an individual permit, this NWP will 

not apply. [See 33 CFR 330.6(c) and (d)] 

4.3 Cumulative Impacts 

The Council on Environmental Quality’s NEPA regulations define cumulative impact as: 

“the impact on the environment which results from the incremental impact of the action 

when added to other past, present, and reasonably foreseeable future actions regardless of 

what agency (Federal or non-Federal) or person undertakes such other actions. Cumulative 

impacts can result from individually minor but collectively significant actions taking place 

over a period of time.” [See 40 CFR 1508.7.] The NEPA cumulative impacts analysis for an 

NWP includes Federal and non-Federal activities that affect the Nation’s wetlands, streams, 

and other aquatic resources, and is not limited to activities authorized by NWPs or other DA 

permits. The geographic scope of the cumulative impacts analysis is the United States, 

where the NWP can be used to authorize activities that require DA authorization. The 

temporal scope of the cumulative effects analysis includes past actions that have affected the 

Nation’s wetlands, streams, and other aquatic resources, as well as present actions and 

reasonably foreseeable future actions that affect aquatic resources. 

There are many activities that contribute to cumulative effects on wetlands, streams, and 

other aquatic resources in the United States, and alter the quantity and quality of those 

resources. Not all of those activities are regulated by the Corps under Section 404 of the 

Clean Water Act and Section 10 of the Rivers and Harbors Act of 1899. Federal, nonfederal, and private activities contribute cumulative effects to aquatic resources. Activities 

authorized by DA permits, including structures and work in navigable waters and discharges 
14 

of dredged or fill material, can directly or indirectly cause the loss of, or adversely affect the 

functions provided by, wetlands, streams, and other aquatic resources. Activities that do not 

require DA permits, because they are exempt from section 404 permit requirements, can 

also adversely affect the quantity and quality of the Nation’s wetlands, streams, and other 

aquatic resources. Discharges of dredged or fill material that convert wetlands, streams, and 

other aquatic resources to upland areas result in permanent losses of aquatic resource 

functions and services. Temporary fills and other activities may cause short-term or partial 

losses of aquatic resource functions and services. 

In addition to activities regulated and authorized by the Corps, including those authorized by 

this nationwide permit, other include federal, non-federal, and private actions not regulated 

by the Corps have cumulative effects on the Nation’s wetlands, streams, and aquatic 

resources, and adversely affect the quantity and quality of those resources. Changes in the 

use of uplands next to or near wetlands, streams, and other aquatic resources may directly or 

indirectly diminish the ecological functions and services provided by those waters (e.g., 

Allan 2004 for streams; Zedler and Kercher 2005 for wetlands). 

Actions that affect wetland quantity and quality include: land use changes that alter local 

hydrology (including water withdrawal), clearing and draining wetlands, constructing levees 

that sever hydrologic connections between rivers and floodplain wetlands, constructing 

other obstructions to water flow (e.g., dams, locks), constructing water diversions, 

accumulating nutrients and contaminants, and fire suppression (Brinson and Malvárez. 

2002). 

Actions that affect the quantity and quality of streams and rivers include habitat alterations 

caused by dam construction, channelization, and land use changes; changes in species 

composition caused by non-indigenous species; and additions of pollutants through either 

point sources or non-point sources (Allan and Castillo 2007). In urbanized and agricultural 

watersheds, the number of small stream channels has been substantially reduced, in part by 

activities that occurred between the 19th and mid-20th centuries (Meyer and Wallace 2001). 

Activities that affect the quantity and quality of small streams include residential, 

commercial, and industrial development, mining, agricultural activities, forestry activities, 

and road construction (Meyer and Wallace 2001). 

Dahl (1990) estimates that approximately 53 percent of the wetlands in the conterminous 

United States were lost in the 200-year period covering the 1780s to 1980s. The annual rate 

of wetland loss has decreased substantially since the 1970s (Dahl 2006), when wetland 

regulation became more prevalent (Brinson and Malvárez. 2002). According to the 2006 

status and trends report, during the period of 1998 to 2004 urban development accounted for 

39% of wetland losses (88,960 acres), rural development resulted in 22% of wetland losses 

(51,440 acres), silviculture accounted for 8% of wetland losses (18,000 acres), and wetland 

conversion to deepwater habitats caused a 31% loss in wetland area (70,100 acres) (Dahl 

2006). Some of the losses are for non-jurisdictional wetlands and some losses may be due to 

activities not regulated under Section 404 of the Clean Water Act, such as unregulated 

drainage activities or water withdrawals. From 1998 to 2004, approximately 70,770 acres of 

wetlands were gained as a result of wetland restoration and conservation programs on 
15 

agricultural land (Dahl 2006). Another source of wetland gain is conversion of uplands to 

wetlands (349,600 acres during the same time period) (Dahl 2006). It is important to 

understand that inventories of wetlands, streams, and other aquatic resources are likely to be 

incomplete (e.g., Dahl 2006. Meyer and Wallace 2001), which further complicates 

cumulative effects analysis. 

The estimated contribution of this NWP to the cumulative effects to wetlands, streams, and 

other aquatic resources in the United States during the five year period the NWP is in effect 

is provided in section 6.2.2. 

In a specific watershed, division or district engineers may determine that the cumulative 

adverse effects of activities authorized by NWPs are more than minimal. Division and 

district engineers will conduct more detailed assessments for geographic areas that are 

determined to be potentially subject to more than minimal cumulative adverse effects. 

Division and district engineers have the authority to require individual permits where the 

cumulative adverse effects are more than minimal, or add conditions to the NWP either on a 

case-by-case or regional basis to ensure that the cumulative adverse effects are minimal. 

When division or district engineers determine that a geographic area is subject to more than 

minimal cumulative adverse effects due to the use of the NWPs, they will use the revocation 

and modification procedure at 33 CFR 330.5. In reaching the final decision, they will 

compile information on the cumulative adverse effects and supplement this document. 

The Corps expects that the convenience and time savings associated with the use of this 

NWP will encourage applicants to design their projects within the scope of the NWP rather 

than request individual permits for projects which could result in greater adverse impacts to 

the aquatic environment. The minimization encouraged by the issuance of this NWP, as well 

as compensatory mitigation that may be required for specific activities authorized by this 

NWP, will help reduce cumulative effects to the Nation’s aquatic resources. 

5.0 Public Interest Review 

5.1 Public Interest Review Factors (33 CFR 320.4(a)(1)) 

For each of the 20 public interest review factors, the extent of the Corps consideration of 

expected impacts resulting from the use of this NWP is discussed, as well as the reasonably 

foreseeable cumulative adverse effects that are expected to occur. The Corps decision 

process involves consideration of the benefits and detriments that may result from the 

activities authorized by this NWP. 

(a) Conservation: The activities authorized by this NWP may modify the natural resource 

characteristics of the project area. Compensatory mitigation, if required for activities 

authorized by this NWP, will result in the restoration, enhancement, establishment, or 

preservation of aquatic habitats that will offset losses of conservation values. The adverse 

effects of activities authorized by this NWP on conservation will be minor. 
16 

(b) Economics: Water-based renewable energy generation pilot projects will have positive 

impacts on the local economy. During construction, these activities will generate jobs and 

revenue for local contractors as well as revenue to building supply companies that sell 

construction materials. Energy generated from wind or hydrokinetic pilot facilities may be 

used to power residences, industrial facilities, schools, and other facilities. Water-based 

renewable energy generation pilot projects will provide employment for people. Attendant 

features associated with these types of developments will provide employment opportunities 

for the operation and maintenance of these facilities. Renewable energy generation pilot 

projects authorized by this NWP will also benefit the community by improving the local 

economic base, which is affected by employment, tax revenues, community services, and 

property values. 

(c) Aesthetics: Water-based renewable energy generation pilot projects will alter the visual 

character of some waters of the United States. The extent and perception of these changes 

will vary, depending on the size and configuration of the pilot projects, the nature of the 

surrounding area, and the public uses of the area. Water-based renewable energy generation 

pilot projects authorized by this NWP can also modify other aesthetic characteristics, such 

as air quality and the amount of noise. The increased human use of the project area and 

surrounding land will also alter local aesthetic values. 

(d) General environmental concerns: Activities authorized by this NWP will affect general 

environmental concerns, such as water, air, noise, and land pollution. The authorized work 

will also affect the physical, chemical, and biological characteristics of the environment. 

The adverse effects of the activities authorized by this NWP on general environmental 

concerns will be minor. Adverse effects to the chemical composition of the aquatic 

environment will be controlled by general condition 6, which states that the material used 

for construction must be free from toxic pollutants in toxic amounts. General condition 22 

requires mitigation to minimize adverse effects to the aquatic environment through 

avoidance and minimization at the project site. Compensatory mitigation may be required 

by district engineers to ensure that the net adverse effects on the aquatic environment are 

minimal. It is important to note that the Corps scope of review is usually limited to impacts 

to aquatic resources. Specific environmental concerns are addressed in other sections of this 

document. 

(e) Wetlands: Activities authorized by this NWP may result in the destruction of wetlands. 

In most cases, the affected wetlands will be permanently filled, especially where buildings, 

roads, utilities, and other permanent fills are located, resulting in the permanent loss of 

aquatic resource functions and services. Wetlands may also be converted to other uses and 

habitat types. Some wetlands may be temporarily impacted by the work through the use of 

temporary staging areas and access roads. These wetlands will be restored, unless the 

district engineer authorizes another use for the area, but the plant community may be 

different, especially if the site was originally forested. For most activities requiring 

notification, compensatory mitigation will be required to offset the loss of wetlands and 

ensure that the adverse effects to the aquatic environment are minimal. 

Wetlands provide habitat, including foraging, nesting, spawning, rearing, and resting sites 
17 

for aquatic and terrestrial species. The destruction of wetlands may alter natural drainage 

patterns. Wetlands reduce erosion by stabilizing the substrate. Wetlands also act as storage 

areas for stormwater and flood waters. Wetlands may act as groundwater discharge or 

recharge areas. The loss of wetland vegetation will adversely affect water quality because 

these plants trap sediments, pollutants, and nutrients and transform chemical compounds. 

Wetland vegetation also provides habitat for microorganisms that remove nutrients and 

pollutants from water. Wetlands, through the accumulation of organic matter, act as sinks 

for some nutrients and other chemical compounds, reducing the amounts of these substances 

in the water. 

General condition 22 requires avoidance and minimization of impacts to waters of the 

United States, including wetlands, at the project site. Compensatory mitigation may be 

required by district engineers to ensure that the net adverse effects on the aquatic 

environment are minimal. General condition 21 prohibits the use of this NWP to discharge 

dredged or fill material in designated critical resource waters and adjacent wetlands, which 

may include high value wetlands. Division engineers can regionally condition this NWP to 

restrict or prohibit the use of this NWP in high value non-tidal wetlands. District engineers 

will also exercise discretionary authority to require an individual permit if the wetlands to be 

filled are high value and the work will result in more than minimal adverse effects on the 

aquatic environment. District engineers can also add case-specific special conditions to the 

NWP authorization to provide protection to wetlands or require compensatory mitigation to 

offset losses of wetlands. 

(f) Historic properties: General condition 20 states that in cases where the district engineer 

determines that the activity may affect properties listed, or eligible for listing, in the 

National Register of Historic Places, the activity is not authorized, until the requirements of 

Section 106 of the National Historic Preservation Act have been satisfied.

(g) Fish and wildlife values: This NWP authorizes activities in waters of the United States, 

which provide habitat to many species of fish and wildlife. Activities authorized by this 

NWP may alter the habitat characteristics of open coastal waters, rivers, and wetlands, 

decreasing the quantity and quality of fish and wildlife habitat. Wetland and riparian 

vegetation provides food and habitat for many species, including foraging areas, resting 

areas, corridors for wildlife movement, and nesting and breeding grounds. Open waters 

provide habitat for fish and other aquatic organisms. Woody riparian vegetation shades 

streams, which reduces water temperature fluctuations and provides habitat for fish and 

other aquatic animals. Riparian vegetation provides organic matter that is consumed by fish 

and aquatic invertebrates. Woody riparian vegetation creates habitat diversity in streams 

when trees and large shrubs fall into the channel, forming snags that provide habitat and 

shade for fish. The morphology of a stream channel may be altered by activities authorized 

by this NWP, which can affect fish populations. However, pre-construction notification is 

required for all activities, which provides the district engineer with an opportunity to review 

the proposed work and assess potential impacts on fish and wildlife values and ensure that 

the authorized activity results in minimal adverse effects on the aquatic environment. 

Compensatory mitigation may be required by district engineers to restore, enhance, 

establish, and/or preserve wetlands and other aquatic habitats to offset losses of waters of 
18 

the United States. Riparian areas next to open and flowing waters may also be required as 

compensatory mitigation. These methods of compensatory mitigation will provide fish and 

wildlife habitat values. 

General condition 2 will reduce the adverse effects to fish and other aquatic species by 

prohibiting activities that substantially disrupt the movement of indigenous aquatic species, 

unless the primary purpose of the activity is to impound water. Compliance with general 

conditions 3 and 5 will ensure that the authorized work has minimal adverse effects on 

spawning areas and shellfish beds, respectively. The authorized work cannot have more 

than minimal adverse effects on breeding areas for migratory birds, due to the requirements 

of general condition 4. 

Compliance with the Bald and Golden Eagle Protection Act (16 U.S.C. 668(a)-(d)), the 

Migratory Bird Treaty Act (16 U.S.C. 703; 16 U.S.C. 712), and the Marine Mammal 

Protection Act (16 U.S.C. 1361 et seq.), including any requirements to obtain take permits, 

is the responsibility of the project proponent for a particular NWP activity. 

Consultation pursuant to the essential fish habitat provisions of the Magnuson-Stevens 

Fishery Conservation and Management Act will occur as necessary for proposed NWP 

activities that may adversely affect essential fish habitat. Consultation may occur on a caseby-case or programmatic basis. Division and district engineers can impose regional and 

special conditions to ensure that activities authorized by this NWP will result in minimal 

adverse effects on essential fish habitat. 

(h) Flood hazards: The activities authorized by this NWP may affect the flood-holding 

capacity of 100-year floodplains, including surface water flow velocities. Changes in the 

flood-holding capacity of 100-year floodplains may impact human health, safety, and 

welfare. To minimize these adverse effects, general condition 10 requires authorized 

activities to comply with any applicable FEMA-approved sate or local floodplain 

management requirements. Compliance with general condition 9 will also reduce flood 

hazards. This general condition requires the permittee to maintain, to the maximum extent 

practicable, the pre-construction course, condition, capacity, and location of open waters, 

except under certain circumstances. Much of the land area within 100-year floodplains is 

upland, and outside of the Corps scope of review. 

(i) Floodplain values: Activities authorized by this NWP may affect the flood-holding 

capacity of the floodplain, as well as other floodplain values. The fish and wildlife habitat 

values of floodplains will be adversely affected by activities authorized by this NWP, by 

modifying or eliminating areas used for nesting, foraging, resting, and reproduction. The 

water quality functions of floodplains may also be adversely affected by these activities. 

Modification of the floodplain may also adversely affect other hydrological processes, such 

as groundwater recharge. Since each activity requires pre-construction notification, district 

engineers will review the proposed work to ensure that those activities result in minimal 

adverse effects on the aquatic environment. 

In many cases, compensatory mitigation will be required for activities authorized by this 
19 

NWP, which will offset losses of waters of the United States and provide water quality 

functions and wildlife habitat. General condition 22 requires avoidance and minimization of 

impacts to waters of the United States to the maximum extent practicable at the project site, 

which will reduce losses of floodplain values. The mitigation requirements of general 

condition 22 will help ensure that the adverse effects of these activities on floodplain values 

are minimal. The requirements of general condition 10 will minimize adverse effects to the 

flood storage capacity of 100-year floodplains. Compliance with general condition 9 will 

also ensure that activities in 100-year floodplains will not cause more than minimal adverse 

effects on flood storage and conveyance. 

(j) Land use: Activities authorized by this NWP, such as attendant features supporting 

water-based renewable energy generation pilot projects, will often change the land use from 

natural to developed. The change in land use will alter the character of the area, usually 

resulting in the loss of open space. The general public will benefit from the water-based 

renewable energy generation pilot projects that will be authorized by this permit. Since the 

primary responsibility for land use decisions is held by state, local, and Tribal governments, 

the Corps scope of review is limited to significant issues of overriding national importance, 

such as navigation and water quality (see 33 CFR 320.4(j)(2)). 

(k) Navigation: Activities authorized by this NWP will not adversely affect navigation, 

because these activities must comply with general condition 1. This NWP requires 

notification for all activities, which will allow district engineers to review the proposed 

work and determine if there will be any adverse effects on navigation. 

(l) Shore erosion and accretion: The activities authorized by this NWP will have minor 

direct effects on shore erosion and accretion processes, since the water-based renewable 

energy generation pilot projects will be placed in open waters. However, NWP 13, regional 

general permits, or individual permits may be used to authorize bank stabilization projects 

associated with water-based renewable energy generation pilot projects, which may affect 

shore erosion and accretion. 

(m) Recreation: Activities authorized by this NWP may change the recreational uses of the 

area. Certain recreational activities, such as bird watching, hunting, and fishing may no 

longer be available in the area. Some water-based renewable energy generation pilot 

projects may eliminate recreational uses of the area. 

(n) Water supply and conservation: Activities authorized by this NWP will have negligible 

adverse effects on surface water and groundwater supplies. The construction of building 

pads, foundations, and attendant features such as roads and parking lots will increase the 

amount of impervious surface in the area, which may decrease replenishment of 

groundwater supplies. Activities authorized by this NWP can also affect the quality of 

water supplies by adding pollutants and toxic chemicals to surface waters and groundwater, 

but many causes of water pollution, such as discharges regulated under Section 402 of the 

Clean Water Act, are outside the Corps scope of review. Some water pollution concerns can 

be addressed through the water quality management measures that may be required for 

activities authorized by this NWP. The quantity and quality of local water supplies may be 
20 

enhanced through the construction of water treatment facilities. Division and district 

engineers can prohibit the use of this NWP in watersheds for public water supplies, if it is in 

the public interest to do so. General condition 7 prohibits discharges in the vicinity of 

public water supply intakes. Compensatory mitigation may be required for activities 

authorized by this NWP, which will help improve the quality of surface waters. 

(o) Water quality: Water-based renewable energy generation pilot projects and their 

attendant features may have adverse effects on water quality. These activities can result in 

increases in nutrients, sediments, and pollutants in the water. The loss of wetland and 

riparian vegetation will adversely affect water quality because these plants trap sediments, 

pollutants, and nutrients and transform chemical compounds. Wetland and riparian 

vegetation also provides habitat for microorganisms that remove nutrients and pollutants 

from water. Wetlands, through the accumulation of organic matter, act as sinks for some 

nutrients and other chemical compounds, reducing the amounts of these substances in the 

water column. Wetlands and riparian areas also decrease the velocity of flood waters, 

removing suspended sediments from the water column and reducing turbidity. Riparian 

vegetation also serves an important role in the water quality of streams by shading the water 

from the intense heat of the sun. Compensatory mitigation may be required for activities 

authorized by this NWP, to ensure that the work does not have more than minimal adverse 

effects on the aquatic environment, including water quality. Wetlands and riparian areas 

restored, established, enhanced, or preserved as compensatory mitigation may provide local 

water quality benefits. 

During construction of these water-based renewable energy generation pilot projects, small 

amounts of oil and grease from construction equipment may be discharged into the 

waterway. Because most of the construction will occur during a relatively short period of 

time, the frequency and concentration of these discharges are not expected to have more 

than minimal adverse effects on overall water quality. 

This NWP requires a Section 401 water quality certification, since it authorizes discharges 

of dredged or fill material into waters of the United States. Most water quality concerns are 

addressed by the state or Tribal Section 401 agency. In accordance with general condition 

24, the permittee may be required to develop and implement water quality management 

measures that minimizes the degradation of the downstream aquatic environment, including 

water quality. The district engineer may require water quality management measures to 

ensure that adverse effects to water quality are minimal. Water quality management 

measures may involve the installation of stormwater management facilities to trap pollutants 

and the establishment and maintenance of vegetated buffers next to open waters. The 

establishment and maintenance of riparian areas may be required for activities authorized by 

the NWP, if there are streams or other open waters on the project site. The riparian areas 

will protect downstream water quality and enhance the aquatic habitat. 

(p) Energy needs: The water-based renewable energy generation pilot projects authorized by 

this NWP will increase energy production in the area. Existing infrastructure may have to 

be expanded to transfer the energy to new and existing customers. 
21 

(q) Safety: The water-based renewable energy generation pilot projects authorized by this 

NWP will be subject to Federal, state, and local safety laws and regulations. Therefore, this 

NWP will not adversely affect the safety of the project area. 

(r) Food and fiber production: Activities authorized by this NWP may adversely affect food 

and fiber production, especially where attendant features for water-based renewable energy 

generation pilot projects are constructed on farmland. The construction of attendant features 

on farmland reduces the amount of available agricultural land in the nation, unless that land 

is replaced by converting other land, such as forest, to agricultural land. The loss of 

farmland is outside of the Corps scope of review. 

(s) Mineral needs: Activities authorized by this NWP may increase demand for aggregates 

and stone, which are used to construct buildings and roads. Water-based renewable energy 

generation pilot projects authorized by this NWP may increase the demand for other 

building materials, such as steel, aluminum, and copper, which are made from mineral ores. 

(t) Considerations of property ownership: The NWP complies with 33 CFR 320.4(g), which 

states that an inherent aspect of property ownership is a right to reasonable private use. The 

NWP provides expedited DA authorization for water-based renewable energy generation 

pilot projects, provided the activity complies with the terms and conditions of the NWP and 

results in minimal adverse effects on the aquatic environment. 

5.2 Additional Public Interest Review Factors (33 CFR 320.4(a)(2)) 

5.2.1 Relative extent of the public and private need for the proposed structure or work

This NWP authorizes discharges of dredged or fill material into waters of the United States, 

as well as structures or work in navigable waters of the United States, for water-based 

renewable energy generation pilot projects, including their attendant features, that have 

minimal adverse effects on the aquatic environment, individually and cumulatively. These 

activities satisfy public and private needs for renewable energy. The need for this NWP is 

based upon the number of these activities that occur annually with minimal adverse effects 

on the aquatic environment. 

5.2.2 Where there are unresolved conflicts as to resource use, the practicability of using 

reasonable alternative locations and methods to accomplish the objective of the 

proposed structure or work

Most situations in which there are unresolved conflicts concerning resource use arise when 

environmentally sensitive areas are involved (e.g., special aquatic sites, including wetlands) 

or where there are competing uses of a resource. The nature and scope of the activity, when 

planned and constructed in accordance with the terms and conditions of this NWP, reduce 

the likelihood of such conflict. In the event that there is a conflict, the NWP contains 

provisions that are capable of resolving the matter (see Section 1.2 of this document). 

General condition 22 requires permittees to avoid and minimize adverse effects to waters of 
22 

the United States to the maximum extent practicable on the project site. Consideration of 

off-site alternative locations is not required for activities that are authorized by general 

permits. General permits authorize activities that have minimal individual and cumulative 

adverse effects on the aquatic environment and overall public interest. District engineers 

will exercise discretionary authority and require an individual permit if the proposed work 

will result in more than minimal adverse environmental effects on the project site. The 

consideration of off-site alternatives can be required during the individual permit process. 

5.2.3 The extent and permanence of the beneficial and/or detrimental effects which the 

proposed structure or work is likely to have on the public and private uses to which 

the area is suited

The nature and scope of the work authorized by the NWP will most likely restrict the extent 

of the beneficial and detrimental effects to the area immediately surrounding the waterbased renewable energy generation pilot projects. Activities authorized by this NWP will 

have minimal adverse effects on the aquatic environment. 

The terms, conditions, and provisions of the NWP were developed to ensure that individual 

and cumulative adverse environmental effects are minimal. Specifically, NWPs do not 

obviate the need for the permittee to obtain other Federal, state, or local authorizations 

required by law. The NWPs do not grant any property rights or exclusive privileges (see 33 

CFR 330.4(b) for further information). Additional conditions, limitations, restrictions, and 

provisions for discretionary authority, as well as the ability to add activity-specific or 

regional conditions to this NWP, will provide further safeguards to the aquatic environment 

and the overall public interest. There are also provisions to allow suspension, modification, 

or revocation of the NWP. 

6.0 Clean Water Act Section 404(b)(1) Guidelines Analysis 

The 404(b)(1) compliance criteria for general permits are provided at 40 CFR 230.7. 
23 

6.1 Evaluation Process (40 CFR 230.7(b)) 

6.1.1 Alternatives (40 CFR 230.10(a))

General condition 22 requires permittees to avoid and minimize discharges of dredged or fill 

material into waters of the United States to the maximum extent practicable on the project 

site. The consideration of off-site alternatives is not directly applicable to general permits. 

6.1.2 Prohibitions (40 CFR 230.10(b))

This NWP authorizes discharges of dredged or fill material into waters of the United States, 

which require water quality certification. Water quality certification requirements will be 

met in accordance with the procedures at 33 CFR 330.4(c). 

No toxic discharges will be authorized by this NWP. General condition 6 states that the 

material must be free from toxic pollutants in toxic amounts. 

This NWP does not authorize activities that jeopardize the continued existence of any listed 

threatened or endangered species or result in the destruction or adverse modification of 

critical habitat. Reviews of preconstruction notifications, regional conditions, and local 

operating procedures for endangered species will ensure compliance with the Endangered 

Species Act. Refer to general condition 19 and to 33 CFR 330.4(f) for information and 

procedures. 

This NWP will not authorize the violation of any requirement to protect any marine 

sanctuary. Refer to section 6.2.3(j)(1) of this document for further information. 

6.1.3 Findings of Significant Degradation (40 CFR 230.10(c))

Potential impact analysis (Subparts C through F): The potential impact analysis specified in 

Subparts C through F is discussed in section 6.2.3 of this document. Mitigation required by 

the district engineer will ensure that the adverse effects on the aquatic environment are 

minimal. 

Evaluation and testing (Subpart G): Because the terms and conditions of the NWP specify 

the types of discharges that are authorized, as well as those that are prohibited, individual 

evaluation and testing for the presence of contaminants will normally not be required. If a 

situation warrants, provisions of the NWP allow division or district engineers to further 

specify authorized or prohibited discharges and/or require testing. 

Based upon Subparts B and G, after consideration of Subparts C through F, the discharges 

authorized by this NWP will not cause or contribute to significant degradation of waters of 

the United States. 
24 

6.1.4 Factual determinations (40 CFR 230.11)

The factual determinations required in 40 CFR 230.11 are discussed in section 6.2.3 of this 

document. 

6.1.5 Appropriate and practicable steps to minimize potential adverse impacts (40 CFR 

230.10(d))

As demonstrated by the information in this document, as well as the terms, conditions, and 

provisions of this NWP, actions to minimize adverse effects (Subpart H) have been 

thoroughly considered and incorporated into the NWP. General condition 22 requires 

permittees to avoid and minimize discharges of dredged or fill material into waters of the 

United States to the maximum extent practicable on the project site. Compensatory 

mitigation required by the district engineer will ensure that the net adverse effects on the 

aquatic environment are minimal. 

6.2 Evaluation Process (40 CFR 230.7(b)) 

6.2.1 Description of permitted activities (40 CFR 230.7(b)(2)) 

As indicated by the text of this NWP in section 1.0 of this document, and the discussion of 

potential impacts in section 4.0, the activities authorized by this NWP are sufficiently 

similar in nature and environmental impact to warrant authorization under a single general 

permit. Specifically, the purpose of the NWP is to authorize discharges of dredged or fill 

material and structures or work for water-based renewable energy generation pilot projects 

and their attendant features. The nature and scope of the impacts are controlled by the terms 

and conditions of the NWP. 

The activities authorized by this NWP are sufficiently similar in nature and environmental 

impact to warrant authorization by a general permit. The terms of the NWP authorize a 

specific category of activity (i.e., discharges of dredged or fill material and structures or 

work for water-based renewable energy generation pilot projects and their attendant 

features) in a specific category of waters (i.e., waters of the United States, including 

navigable waters). The restrictions imposed by the terms and conditions of this NWP will 

result in the authorization of activities that have similar impacts on the aquatic environment, 

namely the replacement of aquatic habitats, such as certain categories of waters and 

wetlands, with water-based renewable energy generation pilot projects and attendant 

features that provide support and amenities for those water-based renewable energy 

generation pilot projects. 

If a situation arises in which the activity requires further review, or is more appropriately 

reviewed under the individual permit process, provisions of the NWPs allow division and/or 

district engineers to take such action. 
25 

6.2.2 Cumulative effects (40 CFR 230.7(b)(3))

The 404(b)(1) Guidelines at 40 CFR 230.11(a) define cumulative impacts as “...the changes 

in an aquatic ecosystem that are attributable to the collective effect of a number of 

individual discharges of dredged or fill material.” If a situation arises in which cumulative 

effects are likely to be more than minimal and the proposed activity requires further review, 

or is more appropriately reviewed under the individual permit process, provisions of the 

NWPs allow division and/or district engineers to take such action. 

Based on a survey of district offices, the Corps estimates that this NWP will be used 

approximately 50 times per year on a national basis, resulting in impacts to approximately 

20 acres of waters of the United States, including jurisdictional wetlands. The Corps 

estimates that approximately 37 acres of compensatory mitigation will be required to offset 

these impacts. The demand for these types of activities could increase or decrease over the 

five-year duration of this NWP. Using the current trend, approximately 250 activities could 

be authorized over a five year period until this NWP expires, resulting in impacts to 

approximately 100 acres of waters of the United States, including jurisdictional wetlands. 

Approximately 185 acres of compensatory mitigation would be required to offset those 

impacts. Compensatory mitigation is the restoration (re-establishment or rehabilitation), 

establishment, enhancement, and/or in certain circumstances preservation of aquatic 

resources for the purposes of offsetting unavoidable adverse impacts which remain after all 

appropriate and practicable avoidance and minimization has been achieved (see 33 CFR 

332.2). Stream rehabilitation and enhancement projects, including the restoration and 

preservation of riparian areas, provide riverine functions and services (Allan and Castillo 

2007 for rivers and streams, NRC (2002) for riparian areas). Wetland restoration, 

enhancement, and establishment projects can provide wetland functions and services, as 

long as the wetland compensatory mitigation project is placed in an appropriate landscape 

position, has appropriate hydrology for the desired wetland type, and watershed condition 

will support the desired wetland type (NRC 2001). The required compensatory mitigation 

will attenuate cumulative impacts on the Nation’s aquatic resources by providing aquatic 

resource functions and services, so that the net effects on the aquatic environment resulting 

from the activities authorized by this NWP will be minimal. The Corps expects that the 

convenience and time savings associated with the use of this NWP will encourage applicants 

to design their projects within the scope of the NWP rather than request individual permits 

for projects which could result in greater adverse impacts to the aquatic environment. 

6.2.3 Section 404(b)(1) Guidelines Impact Analysis, Subparts C through F

(a) Substrate: Discharges of dredged or fill material into waters of the United States will 

alter the substrate of those waters, usually replacing the aquatic area with dry land, and 

changing the physical, chemical, and biological characteristics of the substrate. The original 

substrate will be removed or covered by other material, such as concrete, asphalt, soil, 

gravel, etc. Temporary fills may be placed upon the substrate, but must be removed upon 

completion of the work (see general condition 13). Higher rates of erosion may result 

during construction, but general condition 12 requires the use of appropriate measures to 

control soil erosion and sediment. 
26 

(b) Suspended particulates/turbidity: Depending on the method of construction, soil erosion 

and sediment control measures, equipment, composition of the bottom substrate, and wind 

and current conditions during construction, fill material placed in open waters will 

temporarily increase water turbidity. Pre-construction notification is required for all 

discharges, which will allow district engineers to review each activity and ensure that 

adverse effects on the aquatic environment are minimal. Particulates will be resuspended in 

the water column during removal of temporary fills. The turbidity plume will normally be 

limited to the immediate vicinity of the disturbance and should dissipate shortly after each 

phase of the construction activity. General condition 12 requires the permittee to stabilize 

exposed soils and other fills, which will reduce turbidity. In many localities, project 

proponents are required to develop and implement sediment and erosion control plans to 

minimize the entry of soil into the aquatic environment. NWP activities cannot create 

turbidity plumes that smother important spawning areas downstream (see general condition 

3). 

(c) Water: Water-based renewable energy generation pilot projects and their attendant 

features can affect some characteristics of water, such as water clarity, chemical content, 

dissolved gas concentrations, pH, and temperature. The construction or expansion of these 

projects can change the chemical and physical characteristics of the waterbody by 

introducing suspended or dissolved chemical compounds or sediments into the water. 

Changes in water quality can affect the species and quantities of organisms inhabiting the 

aquatic area. Water quality certification is required for activities authorized by this NWP 

that result in discharges of dredged or fill material into waters of the United States, which 

will ensure that the work does not violate applicable water quality standards. Permittees 

may be required to implement water quality management measures to ensure that the 

authorized work does not result in more than minimal degradation of water quality. Storm 

water management facilities may be required to prevent or reduce the input of harmful 

chemical compounds into the waterbody. The district engineer may require the 

establishment and maintenance of riparian areas next to open waters, such as streams. 

Riparian areas help improve or maintain water quality, by removing nutrients, moderating 

water temperature changes, and trapping sediments. 

(d) Current patterns and water circulation: Activities authorized by this NWP may adversely 

affect the movement of water in the aquatic environment. All activities authorized by this 

NWP require pre-construction notification, which will help ensure that adverse effects to 

current patterns and water circulation are minimal. Road crossings for an attendant feature 

for a water-based renewable energy generation pilot project may alter water flow patterns 

and circulation. General condition 9 requires the authorized activity to be designed to 

withstand expected high flows and to maintain the course, condition, capacity, and location 

of open waters to the maximum extent practicable. General condition 10 requires activities 

to comply with applicable FEMA-approved state or local floodplain management 

requirements, which will reduce adverse effects to surface water flows. 

(e) Normal water level fluctuations: The activities authorized by this NWP will not 

adversely affect normal patterns of water level fluctuations due to tides and flooding. To 
27 

ensure that the NWP does not authorize activities that adversely affect normal flooding 

patterns, general condition 10 requires NWP activities to comply with applicable FEMAapproved state or local floodplain management requirements. General condition 9 requires 

the permittee to maintain the pre-construction course, condition, capacity, and location of 

open waters, to the maximum extent practicable. 

(f) Salinity gradients: The activities authorized by this NWP are unlikely to adversely affect 

salinity gradients, since the NWP authorizes structures or work, as well as discharges of 

dredged or fill material, for water-based renewable energy generation pilot projects. 

(g) Threatened and endangered species: The Corps believes that the procedures currently in 

place result in proper coordination under Section 7 of the Endangered Species Act (ESA) 

and ensure that activities authorized by this NWP will not jeopardize the continued 

existence or any listed threatened and endangered species or result in the destruction or 

adverse modification of critical habitat. The Corps also believes that current local 

procedures in Corps districts are effective in ensuring compliance with ESA. 

Under general condition 19, no activity is authorized under any NWP which “may affect” a 

listed species or critical habitat, unless Section 7 consultation addressing the effects of the 

proposed activity has been completed. 

Each activity authorized by an NWP is subject to general condition 19, which states that 

“[n]o activity is authorized under any NWP which is likely to directly or indirectly 

jeopardize the continued existence of a threatened or endangered species or a species 

proposed for such designation, as identified under the Federal Endangered Species Act 

(ESA), or which will directly or indirectly destroy or adversely modify the critical habitat of 

such species.” In addition, general condition 19 explicitly states that the NWP does not 

authorize the taking of threatened or endangered species, which will ensure that permittees 

do not mistake the NWP authorization as a Federal authorization to take threatened or 

endangered species. General condition 19 also requires non-federal permittees to notify the 

district engineer if any listed species or designated critical habitat might be affected or is in 

the vicinity of the project, or if the project is located in designated critical habitat. This 

general condition also states that, in such cases, non-federal permittees shall not begin work 

on the activity until notified by the district engineer that the requirements of the ESA have 

been satisfied and that the activity is authorized. 

Under the current Corps regulations (33 CFR 325.2(b)(5)), the district engineer must review 

all permit applications for potential impacts on threatened and endangered species or critical 

habitat. For the NWP program, this review occurs when the district engineer evaluates the 

pre-construction notification or request for verification. Based on the evaluation of all 

available information, the district engineer will initiate consultation with the U.S. Fish and 

Wildlife Service (USFWS) or National Marine Fisheries Service (NMFS), as appropriate, if 

he or she determines that the regulated activity may affect any threatened and endangered 

species or critical habitat. Consultation may occur during the NWP authorization process or 

the district engineer may exercise discretionary authority to require an individual permit for 

the proposed activity and initiate consultation through the individual permit process. If ESA 
28 

consultation is conducted during the NWP authorization process without the district 

engineer exercising discretionary authority, then the applicant will be notified that he or she 

cannot proceed with the proposed activity until ESA consultation is complete. If the district 

engineer determines that the activity will have no effect on any threatened and endangered 

species or critical habitat, then the district engineer will notify the applicant that he or she 

may proceed under the NWP authorization. 

 

Corps districts have, in most cases, established informal or formal procedures with local 

offices of the USFWS and NMFS, through which the agencies share information regarding 

threatened and endangered species and their critical habitat. This information helps district 

engineers determine if a proposed activity may affect endangered species or their critical 

habitat and, if necessary, initiate consultation. Corps districts may utilize maps or databases 

that identify locations of populations of threatened and endangered species and their critical 

habitat. Where necessary, regional conditions are added to NWPs to require notification for 

activities that occur in known locations of threatened and endangered species or critical 

habitat. For activities that require agency coordination during the pre-construction 

notification process, the USFWS and NMFS will review the proposed work for potential 

impacts to threatened and endangered species and their critical habitat. Any information 

provided by local maps and databases and any comments received during the preconstruction notification review process will be used by the district engineer to make a “no 

effect” or “may affect” decision. 

Based on the safeguards discussed above, especially general condition 19 and the NWP 

regulations at 33 CFR 330.5(f), the Corps has determined that the activities authorized by 

this NWP will not jeopardize the continued existence of any listed threatened or endangered 

species or result in the destruction or adverse modification of designated critical habitat. 

Although the Corps continues to believe that these procedures ensure compliance with ESA, 

the Corps has taken some steps to provide further assurance. Corps district offices have met 

with local representatives of the USFWS and NMFS to establish or modify existing 

procedures, where necessary, to ensure that the Corps has the latest information regarding 

the existence and location of any threatened or endangered species or their critical habitat. 

Corps districts can also establish, through local procedures or other means, additional 

safeguards that ensure compliance with ESA. Through formal consultation under Section 7 

of the Endangered Species Act, or through other coordination with the USFWS and/or the 

NMFS, as appropriate, the Corps will establish procedures to ensure that the NWP will not 

jeopardize any threatened and endangered species or result in the destruction or adverse 

modification of designated critical habitat. Such procedures may result in the development 

of regional conditions added to the NWP by the division engineer, or in special conditions to 

be added to an NWP authorization by the district engineer. 

(h) Fish, crustaceans, molluscs, and other aquatic organisms in the food web. All activities 

authorized by this NWP, including discharges into open waters, require pre-construction 

notification to the district engineer, which will allow review of each activity in open waters 

to ensure that adverse effects to fish and other aquatic organisms in the food web are 

minimal. Fish and other motile animals will avoid the project site during construction. 

Sessile or slow-moving animals in the path of discharges, equipment, and building materials 
29 

will be destroyed. Some aquatic animals may be smothered by the placement of fill 

material. Motile animals will return to those areas that are temporarily impacted by the 

work and restored or allowed to revert back to preconstruction conditions. Aquatic animals 

will not return to sites of permanent fills. Benthic and sessile animals are expected to 

recolonize sites temporarily impacted by the work, after those areas are restored. Activities 

that alter the riparian zone, especially floodplains, may adversely affect populations of fish 

and other aquatic animals, by altering stream flow, flooding patterns, and surface and 

groundwater hydrology. Some species of fish spawn on floodplains, which could be 

prevented if the development involves clearing or filling the floodplain. Water-based 

renewable energy generation pilot projects and their attendant features in the vicinity of 

streams may alter habitat features by increasing surface water flow velocities, which can 

increase erosion and reduce the amount of habitat for aquatic organisms and destroy 

spawning areas. These types of activities, if located in the vicinity of streams, can also 

cause more unstable flow regimes, such as higher peak flows, more frequent dry periods, 

and more frequent flooding, which may decrease the amount of habitat for aquatic animals. 

Division and district engineers can place conditions on this NWP to prohibit discharges 

during important stages of the life cycles of certain aquatic organisms. Such time of year 

restrictions can prevent adverse effects to these aquatic organisms during reproduction and 

development periods. General conditions 3 and 5 address protection of spawning areas and 

shellfish beds, respectively. General condition 3 states that activities in spawning areas 

during spawning seasons must be avoided to the maximum extent practicable. In addition, 

general condition 3 also prohibits activities that result in the physical destruction of 

important spawning areas. General condition 5 prohibits activities in areas of concentrated 

shellfish populations. General condition 9 requires the maintenance of pre-construction 

course, condition, capacity, and location of open waters to the maximum extent practicable, 

which will help minimize adverse impacts to fish, shellfish, and other aquatic organisms in 

the food web. 

(i) Other wildlife: Activities authorized by this NWP will result in adverse effects on other 

wildlife associated with aquatic ecosystems, such as resident and transient mammals, birds, 

reptiles, and amphibians, through the destruction of aquatic habitat, including breeding and 

nesting areas, escape cover, travel corridors, and preferred food sources. This NWP does 

not authorize activities that jeopardize the continued existence of Federally-listed 

endangered and threatened species or result in the destruction or adverse modification of 

critical habitat. Compensatory mitigation, including the establishment and maintenance of 

riparian areas next to open waters, may be required for activities authorized by this NWP, 

which will help offset losses of aquatic habitat for wildlife. General condition 4 states that 

activities in breeding areas for migratory birds must be avoided to the maximum extent 

practicable. 

(j) Special aquatic sites: The potential impacts to specific special aquatic sites are discussed 

below: 

(1) Sanctuaries and refuges: The activities authorized by this NWP will have 

minimal adverse effects on waters of the United States within sanctuaries or refuges 
30 

designated by Federal or state laws or local ordinances. General condition 21 prohibits the 

use of this NWP to discharge dredged or fill material in NOAA-managed marine sanctuaries 

and marine monuments, National Estuarine Research Reserves, and state-designated 

outstanding national resource waters. District engineers will exercise discretionary authority 

and require individual permits for specific projects in waters of the United States in 

sanctuaries and refuges if those activities will result in more than minimal adverse effects on 

the aquatic environment. 

(2) Wetlands: The activities authorized by this NWP will have minimal adverse 

effects on wetlands. District engineers will review pre-construction notifications for all 

activities to ensure that the adverse effects on the aquatic environment are minimal. 

Division engineers can regionally condition this NWP to restrict or prohibit its use in certain 

high value wetlands. See paragraph (e) of section 5.1 for a more detailed discussion of 

impacts to wetlands. 

(3) Mud flats: The activities authorized by this NWP will have minimal adverse 

effects on mud flats. Wind turbines and hydrokinetic units will be located in open waters, 

and attendant features will usually be located landward of the high tide line. 

(4) Vegetated shallows: The activities authorized by this NWP will have minimal 

adverse effects on vegetated shallows in tidal waters. Activities in vegetated shallows may 

be authorized by this NWP, but district engineers will review all proposed activities in open 

waters to determine if those activities will result in minimal adverse effects on the aquatic 

environment. If the vegetated shallows are high value and the proposed work will result in 

more than minimal adverse effects on the aquatic environment, the district engineer will 

exercise discretionary authority to require the project proponent to obtain an individual 

permit. 

(5) Coral reefs: The activities authorized by this NWP will have minimal adverse 

effects on coral reefs, since it explicitly does not authorize activities in coral reefs. 

(6) Riffle and pool complexes: Activities in riffle and pool complexes may be 

authorized by this NWP, but district engineers will review all proposed activities in open 

waters to determine if those activities will result in minimal adverse effects on the aquatic 

environment. If the riffle and pool complexes are high value and the proposed work will 

result in more than minimal adverse effects on the aquatic environment, the district engineer 

will exercise discretionary authority to require the project proponent to obtain an individual 

permit. 

(k) Municipal and private water supplies: See paragraph (n) of section 5.1 for a discussion 

of potential impacts to water supplies. 

(l) Recreational and commercial fisheries, including essential fish habitat: The activities 

authorized by this NWP may adversely affect waters of the United States that act as habitat 

for populations of economically important fish and shellfish species. Division and district 

engineers can condition this NWP to prohibit discharges during important life cycle stages, 
31 

such as spawning or development periods, of economically valuable fish and shellfish. All 

discharges into open waters require notification to the district engineer, which will allow 

review of each activity in open waters to ensure that adverse effects to economically 

important fish and shellfish are minimal. Compliance with general conditions 3 and 5 will 

ensure that the authorized work does not adversely affect important spawning areas or 

concentrated shellfish populations. As discussed in paragraph (g) of section 5.1, there are 

procedures to help ensure that impacts to essential fish habitat are minimal, individually or 

cumulatively. For example, division and district engineers can impose regional and special 

conditions to ensure that activities authorized by this NWP will result in minimal adverse 

effects on essential fish habitat. 

(m) Water-related recreation: See paragraph (m) of section 5.1 above. 

(n) Aesthetics: See paragraph (c) of section 5.1 above. 

(o) Parks, national and historical monuments, national seashores, wilderness areas, research 

sites, and similar areas: General condition 21 prohibits the use of this NWP to authorize 

discharges of dredged or fill material in designated critical resource waters and adjacent 

wetlands, which may be located in parks, national and historical monuments, national 

seashores, wilderness areas, and research sites. This NWP can be used to authorize 

activities in parks, national and historical monuments, national seashores, wilderness areas, 

and research sites if the manager or caretaker wants to conduct work in waters of the United 

States and those activities result in minimal adverse effects on the aquatic environment. 

Division engineers can regionally condition the NWP to prohibit its use in designated areas, 

such as national wildlife refuges or wilderness areas. 

7.0 Determinations 

7.1 Finding of No Significant Impact 

[To be determined after review of comments received in response to the proposal.] 

7.2 Public Interest Determination 

[To be determined after review of comments received in response to the proposal.] 

7.3 Section 404(b)(1) Guidelines Compliance 

[To be determined after review of comments received in response to the proposal.] 

7.4 Section 176(c) of the Clean Air Act General Conformity Rule Review 

This NWP has been analyzed for conformity applicability pursuant to regulations 

implementing Section 176(c) of the Clean Air Act. It has been determined that the activities 

authorized by this permit will not exceed de minimis levels of direct emissions of a criteria 
32 

pollutant or its precursors and are exempted by 40 CFR 93.153. Any later indirect 

emissions are generally not within the Corps continuing program responsibility and 

generally cannot be 

practicably controlled by the Corps. For these reasons, a conformity determination is not 

required for this NWP. 

7.5 Compliance with Relevant Executive Orders 

7.5.1 EO 13175, Consultation and Coordination With Indian Tribal Governments

The issuance of this NWP does not have tribal implications. It is generally consistent with 

current agency practice and will not have substantial direct effects on tribal governments, on 

the relationship between the federal government and the Indian tribes, or on the distribution 

of power and responsibilities between the federal government and Indian tribes. Regional 

conditions or other local NWP modifications may be added to this NWP by division and 

district engineers to protect aquatic resources of interest to Tribes, as part of the Corps 

responsibility to protect trust resources. 

7.5.2 EO 11988, Floodplain Management

Compliance with NWP general condition 10, fills in 100-year floodplains, will minimize 

impacts of potential flooding on human health, safety, and welfare, as well as the natural and 

beneficial values of floodplains. 

7.5.3 EO 12898, Environmental Justice

In accordance with Title III of the Civil Right Act of 1964 and Executive Order 12898, it 

has been determined that the issuance of this NWP would not directly or through contractual 

or other arrangements, use criteria, methods, or practices that discriminate on the basis of 

race, color, or national origin nor would it have a disproportionate effect on minority or lowincome communities. 

7.5.4 EO 13112, Invasive Species

The issuance of this NWP will not cause or promote the introduction or spread of invasive 

species in the United States. The district engineer may add special conditions to an NWP 

authorization to require the permittee to control the introduction or spread of invasive 

species at the project site. 
33 

7.5.5 EO 13212 and 13302, Actions to Expedite Energy-Related Projects

The issuance of this NWP will support the policy established in these Executive Orders, by 

providing a efficient form of DA authorization for minor activities associated with energyrelated projects. 
34 

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Ecosystems. Annual Review of Ecology, Evolution, and Systematics. 35:257–284. 

Allan, J.D. and M.M. Castillo. 2007. Stream Ecology: Structure and Function of Running 

Waters, 2nd edition. Springer (The Netherlands). 436 pp. 

Brinson, M.M. and A.I. Malvárez. 2002. Temperate freshwater wetlands: type, status and 

threats. Environmental Conservation 29:115-133. 

Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of Wetlands 

and Deepwater Habitats of the United States. U.S. Department of the Interior, Fish and 

Wildlife Service. FWS/OBS-79-31. 131 pp. 

Dahl, T.E. 2006. Status and trends of wetlands in the conterminous United States 1998 to 

2004. U.S. Department of the Interior, Fish and Wildlife Service, Washington, DC. 112 pp. 

Dahl, T.E. 1990. Wetlands losses in the United States 1780s to 1980s. U.S. Department of 

the Interior, Fish and Wildlife Service, Washington, D.C. 21 pp. 

Hall, J.V., W.E. Frayer, and B.O. Wilen. 1994. Status of Alaska Wetlands. U.S. Department 

of the Interior, Fish and Wildlife Service, Washington, DC. 33 pp. 

Hansen, W.F. 2001. Identifying stream types and management implications. Forest Ecology 

and Management 143:39-46. 

King, D.M., Wainger, L.A., C.C. Bartoldus, and J.S. Wakely. 2000. Expanding wetland 

assessment procedures: Linking indices of wetland function with services and values. 

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Leopold, L.B., M.G. Wolman, and J.P. Miller. 1964. Fluvial Processes in Geomorphology. 

Dover Publications, Inc. (New York). 522 pp. 

Leopold, L.B. 1994. A View of the River. Harvard University Press (Cambridge). 298 pp. 

Meyer, J.L. and J.B. Wallace. 2001. Lost linkages and lotic ecology: rediscovering small 

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Levin. Blackwell Science (Cornwall, Great Britain). pp. 295-317. 

National Research Council (NRC). 1992. Restoration of Aquatic Ecosystems. National 

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National Research Council (NRC). 2001. Compensating for Wetland Losses Under the 

Clean Water Act. National Academy Press (Washington, DC). 322 pp. 
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National Research Council (NRC). 2002. Riparian Areas: Functions and Strategies for 

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Peterson, C.H. and J. Lubchenco. 1997. Marine ecosystem services, in Nature’s Services: 

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(Washington, DC). pp. 177-194. 

Postel, S. and S. Carpenter. 1997. Freshwater ecosystem services, in Nature’s Services: 

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(Washington, DC). pp. 195-214. 

U.S. Department of Agriculture. 2009. Summary Report: 2007 National Resources 

Inventory, Natural Resources Conservation Service, Washington, DC, and Center for Survey 

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10/26/2010) 

Tiner, R.W. 2003. Geographically isolated wetlands in the United States. Wetlands 23:494-

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Tiner, R. 1997. NWI maps: Basic information on the Nation’s wetlands. Bioscience 47:269. 

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