A U.S. GEOLOGICAL SURVEY

DATA STANDARD

Codes for the Identification of

Hydrologic Units in the

United States and the

Caribbean Outlying Areas

GEOLOGICAL SURVEY CIRCULAR 878-A
This report describes one of a series of data standards adopted and implemented by the U.S . Geological Survey for the standardization of data

elements and representation :; used in automated Earth-science systems.

Earth sciences are those scientific disciplines especially required to carry out

the mission of the Geological Survey and are concerned with the material and

morphology of the Earth and physical forces relating to the Earth. These

disciplines include geology, topography, geography, and hydrology.

The Geological Survey has assumed the leadership in developing arid maintaining Earth-science data element and representation standards for use in

the Federal establishment under the terms of a Memorandum of Understanding signed in February 1980 by the National Bureau of Standards of the

Department of Commerce and the Geological Survey, a Bureau of the Department of the Interior . As such., in addition to developing and maintaining

standards, the Geological Survey reviews and processes all requests referred

by the National Bureau of Standards for exceptions, deferments, and revision of standards applicable to Federal Earth-science information systems;

assists the National Bureau of Standards in assessing the need, impact,

benefits, and problems related to the implementation of standards being considered for development, or developed, for use in the Earth sciences ; and

works with other agencies in developing new data standards in the Earth

sciences .

The standard described in this report has been specifically approved for use

within the U.S . Geological Survey. If the standard has been approved for use

throughout the Federal establishment, it is also published by the National

Bureau of Standards as a Federal Information Processing Standard.

Name of Standard: Codes for the Identification of Hydrologic Units in the

United States and the Caribbean Outlying Areas

Date of Approval: July 1981

Maintenance Organization: U.S . Geological Survey

Water Resources Division

Office of Water Data Coordination

41.7 National Center

Reston, VA 22092

Questions concerning the list of entities and codes should be addressed to

the Office of Water Data Coordination, which will make all necessary

amendments to the standard.

Implementation: All Geological Survey data standards are effective iinmediateiy upon the date of approval. Their use is mandatory for all new

and developing systems within the Geological Survey that utilize data

elements and representations described by the standards. All existing

data systems will be modified in accordance with the standards at such

time that future redesign and modifications to the systems take place.

Additional information about Geological Survey data standards and copies

of published standards may be obtained from :

Data Administrator

U.S. Geological Survey

115 National. Center

Reston, VA 22092

Telephone: ('703) 850-6080

FTS 928-6086
A U .S . GEOLOGICAL SURVEY

DATA STANDARD

Codes for the Identification of

Hydrologic Units in the

United States and the

Caribbean Outlying Areas

GEOLOGICAL SURVEY CIRCULAR 878-A
United States Department of the Interior

JAMES G. WATT, Secretary

Geological Survey

Dallas L. Peck, Director

Free on application to Distribution Branch, Text Products Section,

U. S. Geological Survey, 604 South Pickett Street, Alexandria, VA 22304
CONTENTS

Page

Introduction ________-__________._______________-_-_____________________-__________ At

Development of the codes -------------------------------------------------------------- At

Description of the codes --------------------------------------------------------------- AI

Hydrologic unit names _______.____.________________-___________-___________-________. A3

Hydrologic unit codes-Boundary descriptions and names of regions, subregions, accounting;

units, and cataloging units ------------------------------------------------------------- A4

ILLUSTRATION

Page

FIGURE 1 . Map of water-resources regions snowing accounting units of the National Water Data Network A2
Codes four the Identification of Hydrologic Units in

the, United States and the Caribbean Outlying Areas

INTRODUCTION

This report presents and describes codes used for

the identification of hydrologic units in the United

States and the Caribbean outlying areas. The codes

identify a hydrologic system that; divides the

United[ States and the Caribbean into 21 major

regions . These :regions are further subdivided into

approximately 2,150 units that delineate river

basins having drainage areas usually greater than

700 square miles. The codes provide a standardized

base for use by water-resources organizations in

the storage, retrieval., and exchange of hydrologic

data; the indexing and inventorying of hydrologic

data and information ; the cataloging of water-data

acquisition activities;; and a variety of other applications.

DEVELOPMENT OF THE: CODES

In 1974, a new set of maps (State Hydrologic

Unit T)/Iaps) depicting approved boundaries and

codes of river basins of the United States was produced by the U.S. Geological Survey (USGS) in

cooperation with the U.S. Water Resources Council (WRC) . These maps present information on

drainage, culture, hydrography, and hydrologic

boundaries of (1) WRC regions, (2) WRC planning

subregions, (3) National Water, .D~ata . Network accounting units, and (4) cataloging units of the

USGS "Catalog of Information on 'Water Data."

These :four levels of subdivisions, used for the collection and organization of hydrologic data, are

"hydrologic units ." The codes associated with these

units are "hydrologic unit codes."

The hydrologic unit boundaries, codes, and

names were reviewed extensively by all principal

Federal, regional, and State water-resources agencies during a formal review process established for

the State Hydrologic Unit Maps. The forinal

review process consisted of a field review by the 4

regional and 46 district offices of the USGS Water

A1

Resources Division, in conjunction with their principal regional, State, and local cooperators, followed by review and approval[ by the National

Planning and Assessment Committee (NPAC) of

the WRC. NPAC consisted of members from all

principal Federal agencies involved with waterresources planning. Approval by the NPAC constituted approval by the Council of Representatives of the WRC, which had delegated this

authority to the NPAC .

DESCRIPTION OF THIE CODES

All hydrologic limits have been identified by a

unique hydrologic unit code consisting of from two

to eight digits based on the four levels of classification in the hydrologic unit system.

The first level of classification divides the Nation

into 21 major geographic areas or regions-18 in

the conterminous United States and. one each in

Alaska, Hawaii, and the Caribbean (fig. 1) . These

geographic areas (hydrologic areas based on surface topography) contain either the drainage area

of a major river, such as the Missouri Region, or

the combined drainage areas of a series of rivers,

such as the Texas-Gulf Region, which includes a

number of rivers draining into the Gulf of Mexico.

The second level. of classification divides the 21

regions into 222 planning subregions . A planning

subregion includes the area drained by a river

system, a reach of :a river and its tributarie=s in that

reach, a closed basin or basins, or a group of

streams forming a coastal drainage area.

The third level of classification subdivides many

of the planning subregions into accounting; units.

These 352 hydrologic accounting; units nest, within

or are equivalent to the planning subregions. The

accounting units are used by the USGS for designing and managing the National Water Data Network.
'v

FIGURE 1.-Map of water-resources regions showing accounting units of the National Water Data Network.
The fourth level of classification is the cataloging unit, the smallest element in the hierarchy of

hydrologic units . A cataloging unit is a geographic area representing part or all of a surface

drainage basin, a combination of drainage basins,

or a distinct hydrologic feature. These units subdivide the planning subregions and. accounting

units into smaller areas (approximately 2,150 in

the Nation) that are used for cataloging and indexing water-data acquisition activities .

An eight-digit code is used to allow each of the

four levels of classification to be uniquely identified

within four two-digit fields . The first two digits

identify the water-resources region ; the planning

subregion is identified by the first four digits ; the

accounting unit is identified by the first six digits ;

and the addition of the cataloging unit number

completes the eight-digit code . An example is

given below using hydrologic unit code 010802(14:

01-t.he region

0108 -the subregion

010802 - the accounting unit

01080204 - the cataloging unit

A 00 in the accounting unit field of two digits indicates that the accounting; unit and the subregion

are one and the same. Likewise, if the cataloging

unit code is 00, it is the same as the accounting

unit.

HYDROLOGIC UNIT NAMES

In addition to hydrologic unit codes, all

hydrologic units have been assigned names corresponding to the principal hydrologic feature(s)

within the unit or, in the absence of such, to a principal geographic or physical feature within the

unit. In the absence of such features, the assigned

name may reflect a cultural or political feature

within the unit. A.11 regions and subregions are

uniquely named; however, the accounting units are

uniquely named only within each region, and the

cataloging units are uniquely named only within

each accounting unit. Duplication of some names

at the cataloging-unit level is unavoidable because

a large number of streams found throughout the

Nation share the same names.

Acomplete list of all hydrologic: unit codes, along

with their names and the name:; of the States or

outlying areas in which they reside, follows.
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNIT'S

REGION 01 NEW ENGLAND REGION -- THE DRAINAGE WITHIN THE UNITED STATES

THAT ULTIMATELY DISCHARGES INTO : (A) THE BAY OF FUNDY;

(B) THE ATLANTIC OCEAN WITHIN AND BETWEEN THE STATES OF

MAINE AND CONNECTICUT; (C) LONG ISLAND SOUND NORTH OF THE

NEW YORK-CONNECTICUT STATE LINE ; AND (D) THE RIVIERE ST .,

FRANCOIS, A TRIBUTARY OF THE ST . LAWRENCE RIVER. INCLUDES

ALL OF MAINE, NEW HAMPSHIRE AND RHODE ISLAND AND PARTS OF

CONNECTICUT,, MASSACHUSETTS, NEW YORK, AND VERMONT.

SUBREGION 0101 -- ST . JOHN : THE ST . JOHN RIVER BASIN WITHIN THE

UNITED STATES . MAINE.

ACCOUNTING UNIT 010100 °--- ST . JOHN . MAINE .

CATALOGING UNITS 0101.0001 -- UPPER ST . JOHN . MAINE.

0101.000 2 -- ALLAGASH . MAINE .

010'.1.0003 -° FISH . MAINE,.

01071.0004 -- AROOSTOOK. MAINE .

01()71.0005 -- MEDUXNEKEAG,. MAINE.

SUBREGION' 0102 --- PENOBSCOT: THE PENOBSCOT RIVER BASIN . MAINE.

ACCOUNTING UNIT 010200 --- PENOBSCOT. MAINE.

CATALOGING 'UNITS 01020001--- WEST BRANCH PENOBSCOT . MAINE .

0102',0002 °- EAST BRANCH PENOBSCOT. MAINE .

0102',0003 °- MATTAWAMKEAG . MAINE .

0102'0004 °- PISCATAQUIS . MAINE .

01020005 °- LOWER PENOBSCOT. MAINE.,

SUBREGION 0103 -- KENNEBEC : THE KENNEBEC RIVER BASIN,

INCLUDING PART OF MERRYMEETING BAY . MAINE .

ACCOUNTING UNIT 010300 -- KENNEBEC . MAINE .

CATALOGING UNITS 01030001 -- UPPER KENNEBEC . MAINE .

01030002 -- DEAD . MAINE .

01030003 -- LOWER KENNEBEC . MAINE .

SUBREGION 0104 -- ANDROSCOGGIN : THE ANDROSCOGGIN RIVER BASIN,

INCLUDING PART OF MERRYMEETING BAY . ]MAINE,

NEW HAMPSHIRE.

ACCOUNTING UNIT 1010400 -- ANDROSCOGGIN . MAINE, NEW HAMPSHIRE.

CATALOGING UNITS 01040001 -- UPPER ANDROSCOGGIN . MAINE,

NEW HAMPSHIRE.

01040002t-- LOWER ANDROSCOGGIN . MAINE,

NEW HAMPSHIRE.

A4
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

SUBREGION 0105 -- MAINE COASTAL : THE COASTAL DRAINAGE AND ASSOCIATED

WATERS FROM THE MAINE-NEW BRUNSWICK INTERNATIONAL

BOUNDARY TO ..APE SMALL, MAINE, INCLUDING THE

ST . CROIX RIVER BASIN WITHIN THE: UNITED STATES .

MAINE.

ACCOUNTING UNIT 010500 -- MAINE COASTAL . MAINE .

CATALOGING UNITS 01050001 -- ST . CROIX . MAINE.

01050002 -- MAINE COASTAL . MAINE.

01050003 -- ST . GEORGE-SHEEPSCOT . MAINE .

SUBREGION 0106 -- SACO : THE COASTAL DRAINAGE AND ASSOCIATED WATERS

FROM CAPE SMALL, MAINE TO THE MERRIMACK RIVER

BASIN BOUNDARY . MAINE, NEW HAMPSHIRE,

MASSACHUSETTS .

ACCOUNTING UNIT 010600 -- SACO . MAINE, NEW HAMPSHIRE, MASSACHUSETTS .

CATALOGING UNITS 01060001 -- PRESUMPSCOT . MAINE .

01060002 -- SACO . MAINE, NEW HAMPSHIRE .

01060003 --,PISCATAQUA-SALMON FALLS . MAINE,

NEW HAMPSHIRE, MASSACHUSETTS .

SUBREGION 0107 -- MERRIMACK: THE MERRIMACK RIVER BASIN.

MASSACHUSETTS, NEW HAMPSHIRE .

ACCOUNTING UNIT 010700 -- MER:RIMACK . MASSACHUSETTS, NEW HAMPSHIRE.

CATALOGING UNITS 01070001 -- PEMIGEWASSET . NEW HAMPSHIRE .

01070002 -- MERRIMACK. MASSACHUSETTS,

NEW HAMPSHIRE .

01070003 -- CONTOOCOOK. NEW HAMPSHIRE .

01070004 -- NASHUA . MASSACHUSETTS,

NEW HAMPSHIRE .

01070005 -- CONCORD. MASSACHUSETTS .

SUBREGION 0108 -- CONNECTICUT : THE: CONNECTICUT RIVER BASIN .

CONNECTICUT, MAINE, MASSACHUSETTS, NEW HAMPSHIRE,

VERMONT .

ACCOUNTING UNIT 010801 -- UPPER CONNECTICUT : THE CONNECTICUT RIVER

BASIN ABOVE VERNON DAM . NEW HAMPSHIRE,

VERMONT.

CATALOGING UNITS 01080101 -- UPPER CONNECTICUT . NEW HAMPSHIRE,

VERMONT.

01080102 -- PASSUMPSIC . VERMONT.
H Y D R 0 L 0 G I C U N I T C O D E S

BOUNDARY ;DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

01080:103 -°- WAITS . VERMONT.

010840104 -- UPPER CONNECTICUT-MASCOMA .

NEW HAMPSHIRE, VERMONT.

01080:105 -- WHITE. VERMONT.

01080106 -- BLACK-OTTAUQUECHEE . VERMONT .

01080107 -- WEST . VERMONT.

ACCOUNTING UNIT 4)10802 --- LOWER CONNECTICUT : THE CONNECTICUT RI1'TER

BASIN BELOW VERNON DAM. CONNECTICUT,

MASSACHUSETTS, NEW HAMPSHIRE, VERMONT .

CATALOGING UNITS 01080201 -- MIDDLE CONNECTICUT . MASSACHUSETTS,

NEW HAMPSHIRE, VERMONT.

0108 0202 -° MILLER . MASSACHUSETTS,

NEW HAMPSHIRE .

01080203 -- DEERFIELD. MASSACHUSETTS, VERMONT.

01080204 -- CHICOPEE . MASSACHUSETTS.

0108()205 -- LOWER CONNECTICUT . CONNECTICUT,

MASSACHUSETTS .

01080)206 -- WESTFIELD. CONNECTICUT,

MASSACHUSETTS .

01013()207 -- FARMINGTON . CONNECTICUT,

MASSACHUSETTS .

SUBREGION (1109 -- MASSACHUSETTS-RHODE ISLAND COASTAL: THE COASTAL

DRAINAGE: AND ASSOCIATED WATERS FROM THE MERRIMACK

RIVER BASIN BOUNDARY TO AND INCLUDING THE

PAWCATUCK RIVER BASIN . CONNECTICUT, MASSACHUUSE'l"PS,

RHODE 1 13LAND.

ACCOUNTING UNIT 010900 ----- MASSACHUSETTS-RHODE ISLAND COASTAL .

CONNECTICUT, MASSACHUSETTS, RHODE ISLAND .

CATALOGING UNITS 0109()001 -- CHARLES . MASSACHUSETTS .

0109()002 -- CAPE COD . MASSACHUSETTS

RHODE ISLAND .

01090003 -- BLACKSTONE . MASSACHUSETTS,

RHODE ISLAND . .

)1090004 -° NARRAGANSETT . MASSACHUSETTS

RHODE ISLAND,.

01090005 -° PAWCATUCK-WOOD . CONNECTICUT,,

RHODE ISLAND .

SUBREGION 0110 -- CONNECTICUT COASTAL : THE COASTAL DRAINAGE INTO

LONG ISLAND SOUND FROM THE PAWCATUCK RIVER BASIN

BOUNDARY TO AND INCLUDING THE BYRAM FIVER BASIN,

EXCLUDING THE CONNECTICUT RIVER BASIN,

AND INCLUDING LONG ISLAND SOUND NORTH OF THE

NEW YORX-CONNECTICUT STATE LINE . CONNECTICUT,

A6
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

MASSACHUSETTS, NEW YORK, RHODE ISLAND .

ACCOUNTING UNIT 011000 -- CONNECTICUT COASTAL . CONNECTICUT,

MASSACHUSETTS, NEW YORK, RHODE; ISLAND .

CATALOGING UNITS 01.100001 -° QUINEBAUG. CONNECTICUT,

MASSACHUSETTS, RHODE ISLAND .

01.100002 -- SHETUCKET. CONNECTICUT,

MASSACHUSETTS .

01.100003 -° THAMES . CONNECTICUT .

01.100004 --- QUINNIPIAC . CONNECTICUT .

01.100005 -° HOUSATONIC . CONNECTICUT,

MASSACHUSETTS, NEW YORK .

01.100006 -° SAUGATUCK. CONNECTICUT, NEW YORK .

01.100007 -° LONG ISLAND SOUND . CONNECTICUT .

SUBREGION 011.1 --- ST . FRANCOIS : THE RIVIERE ST . FRANCOIS BASIN WITHIN

THE UNITED STATES . VERMONT.

ACCOUNTING UNIT 011100 -- ST . FRANCOIS . VERMON .C .

CATALOGING UNIT 01.110000 -° ST . FRANCOIS . VERMONT .

REGION 02 MID ATLANTIC: REGION -- THE DRAINAGE WITHIN THE UNITED STATES

THAT ULTIMATELY DISCHARGES INTO : (A) THE ATLANTIC: OCEAN

WITHIN AND BETWEEN THE STATES OF NEW YORK AND VIRGINIA,; (B)

LONG ISLAND SOUND SOUTH OF THE NEW YORK-CONNECTIC:U'.P STATE

LINE ; AND (C) THE RIVIERE RICHELIEU, A TRIBUTARY OF THE ST,.

SUBREGION 0201 °- RICHELIEU : THE RIVIERE RICHELIEU BASIN INCLUDING

LAKE CHAMPLAIN DRAINAGE, WITHIN THE UNITED STATE!-, .

NEW YORK VERMONT.

ACCOUNTING UNIT 020100 -- RICHELIEU . NEW YORK, VERMONT .

CATALOGING UNITS 02010001 -- LAKE GEORGE . NEW YORK, VERMONT .

02010002 -- OTTER. VERMONT.

0201001;)3 -- WINOOSKI . VERMONT .

0201001°)4 -- AUSABLE. NEW YORK .

0201001;)5 -- LAMOILLE . VERMONT .

0201001)6 -- GREAT CRAZY-SARANAC . NEW 'YORK .

0:?01001)7 -- MISSISQUOI . VERMONT .

A7

LAWRENCE RIVER. INCLUDES ALL OF DELAWARE, AND NEW JERSEY AND

THE DISTRICT OF COLUMBIA, AND PARTS OF CONNECTICUT, MARYLAND,

MASSACHUSETTS, NEW YORK, PENNSYLVANIA, 'VERMONT, VIRGINIA, AND

WEST VIRGINIA .
H Y I) R 0 L 0 G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

SUBREGION 0202 -- UPPER HUDSON : THE HUDSON RIVER BASIN TO AND

INCLUDING THE POPOLOPEN BROOD; BASIN JUST UPSTREAM[

FROM BEAR MOUNTAIN BRIDGE . NEW JERSEY, NEW YORK,

MASSACHUSETTS, VERMONT.

ACCOUNTING UNIT 020200 -- UPPER HUDSON . NEW JERSEY, NEW YORK,

:MASSACHUSETTS, VERMONT.

CATALOGING UNITS 02020001 --,- UPPER HUDSON . NEW YORK .

02020002 --- SACANDAGA.

NEW

YORK .

02020003 --- HUDSON-HOOSIC. NEW YORK,

MASSACHUSETTS, VERMONT.

02020004 -- MOHAWK . NEW YORK .

02020005 -- SCHOHARIE . NEW YORK .

02020006 -- MIDDLE HUDSON . MASSACHUSETTS,

NEW YORK .

02020007 -- RONDOUT . NEW JERSEY, NEW YORK .

02020008 -- HUDSON-WAPPINGER . NEW YORK .

SUBREGION 0203 --- LOWER HUDSON-LONG ISLAND : THE COASTAL DRAINAGE ANlD

ASSOCIATED WATERS FROM THE BYRAM RIVER BASIN

BOUNDARY, TO THE MANASQUAN RIVER BASIN BOUNDARY,

INCLUDING THE HUDSON RIVER BASIN DOWNSTREAM FROM

THE POPOLOPEN BROOK BASIN BOUNDARY, LONG ISLAND

AND BLOCK ISLAND SOUNDS SOUTH OF THE NEW YORKCONNECTICUT STATE LINE, AND LONG ISLAND .

CONNECTICUT, NEW JERSEY, NEW 'YORK .

ACCOUNTING UNIT 020301 --- LOWER HUDSON : THE COASTAL DRAINAGE AND

ASSOCIATED WATERS FROM THE BYRAM RIVER

BASIN BOUNDARY, TO THE MANASQUA:N RIVER

BASIN BOUNDARY, INCLUDING THE HUDSON

RIVER BASIN DOWNSTREAM FROM THE POPOLOPEN

BROOK BASIN BOUNDARY, AND LONG ISLAND

SOUND IN WESTCHESTER AND BRONX COUNTIES,

NEW YORK, BUT EXCLUDING LONG ISLAND AND

BLOCK ISLAND SOUNDS SOUTH OF THE NEW YORKCONNECTICUT STATE LINE AND LONG ISLAND .

CONNECTICUT, NEW JERSEY, NEW YORK .

CATALOGING UNITS 02.030101 -- LOWER HUDSON . CONNECTICUT NEW

JERSEY, NEW YORK.

02030102 -- BRONX. CONNECTICUT, NEW YORK .

020307-03 -- HACKENSACK-PASSAIC . NEW JERSEY,

NEW YORK .

02:0307.04 -- SANDY HOOK-STATEN ISLAND .

NEW JERSEY, NEW YORK .

02:030105 -° RARITAN . NEW JERSEY .

A8
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

ACCOUNTING UNIT 020302 -- LONG ISLAND : LONG ISLAND AND LONG ISLAND

AND :BLOCK ISLAND SOUNDS SOUTH OF THE NEW

YORK-CONNECTICUT STATE LINE, BUT EXCLUDING

LONG ISLAND SOUND IN WESTCHESTER AND BRONX

COUNTIES, NEW YORK . NEW YORK .

CATALOGING UNITS 02030201 -- NORTHERN LONG ISLAND . NEW YORK .

02030202 -- SOUTHERN LONG ISLAND . NEW YORK .

SUBREGION 0204 -- DELAWARE : THE COASTAL DRAINAGE AND ASSOCIATED WATER.

FROM AND INCLUDING THE MANASQUAN RIVER BASIN TO AND

INCLUDING THE DELAWARE RIVER BASIN WHICH INCLUDES

DELAWARE BAY . DELAWARE, MARYLAND, NEW JERSEY,

NEW YORK PENNSYLVANIA .

ACCOUNTING UNIT 020401 -- UPPER DELAWARE : THE DELAWARE RIVER BASIN

UPSTREAM FROM THE FALL LINE (HIGHEST TIDAL

EFFECT OF THE DELAWARE RIVER) AT TRENTON,

NEW JERSEY . NEW JERSEY, NEW YORK.,

PENNSYLVANIA .

CATALOGING UNITS 02040101. -- UPPER DELAWARE . NEW YORK,

PENNSYLVANIA .

02040102 -- EAST BRANCH DELAWARE . NEW YORK .

02040103 -- LACKAWAXEN . PENNSYLVANIA .

02040104 -- MIDDLE DELAWARE-MONGAUP-BRODHEAD .

NEW JERSEY, NEW YORK, PENNSYLVANIA .

02040105 -- MIDDLE DELAWARE-MUSCONETCONG. NEW

JERSEY, PENNSYLVANIA .

0204010E -- LEHIGH . PENNSYLVANIA .

ACCOUNTING UNIT 020402 -°- LOWER DELAWARE : THE DELAWARE RIVER BASIN

DOWNSTREAM FROM THE FALL LINE AT TRENTON,

NEW JERSEY, INCLUDING DELAWARE BAY.

DELAWARE, MARYLAND, NEW JERSEY,

PENNSYLVANIA .

CATALOGING UNITS 02040201 -- CROSSWICKS-NESHAMINY . NEW JERSEY,

PENNSYLVANIA .

02040202 -- LOWER DELAWARE . NEW JERSEY,

PENNSYLVANIA .

02040203 -- SCHUYLKILL . PENNSYLVANIA .

02040204 -- DELAWARE BAY . DELAWARE, NEW JERSEY .

02040205 -- BRANDYWINE-CHRISTINA . DELAWARE,

MARYLAND, PENNSYLVANIA .

02040206 -- COHANSEY-MAURICE . NEW JERSEY .

02040207 -- BROADKILL-SMYRNA . DELAWARE: .
H Y D R O L O G I C UN I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

ACCOUNTING UNIT 020403 --- NEW JERSEY COASTAL: THE COASTAL DRAINAGE

IN NEW JERSEY FROM AND INCLUDING THE

MANASQUAN RIVER BASIN TO THE DELAWARE BAY

DRAINAGE BOUNDARY . NEW JERSEY .

CATALOGING UNITS 02040 :901 --- MULLICA-TOMS . NEW JERSEY

02040 :302 --- GREAT EGG HARBOR . NEW JERSEY .

SUBREGION 0205 -- SUSQUEHANNA : THE SUSQUEHANNA RIVER BASIN. MARYLAND,

NEW YORK, PENNSYLVANIA.

ACCOUNTING UNIT 020501 --- UPPER SUSQUEHANNA : THE'SUSQUEHANNA RIVER

BASIN ABOVE THE CONFLUENCE WITH THE, WEST

BRANCH SUSQUEHANNA RIVER BASIN., NEW YORK,

PENNSYLVANIA .

CATALOGING UNITS 020501.01 -- UPPER SUSQUEHANNA . NEW YORK,

PENNSYLVANIA .

020501.02 -- CHENANGO . NEW YORK .

020501.03 --- OWEGO-WAPPASENING . NEW YORK,

PENNSYLVANIA .

020501.04 --- TIOGA . NEW YORK, PENNSYLVANIA .

020501.05 --- CHEMUNG. NEW YORK, PENNSYLVANIA .

020501.06 -- UPPER SUSQUEHANNA-TUNKHANNOCK. .

PENNSYLVANIA .

020501.07 -- UPPER SUSQUEHANNA-LACKAWANNA .

PENNSYLVANIA .

ACCOUNTING UNIT 020502 -- 'WEST BRANCH SUSQUEHANNA : THE WEST BRANCH

SUSQUEHANNA RIVER BASIN .

PENNSYLVANIA .

CATALOGING UNITS 02050201 -- UPPER WEST BRANCH SUSQUEHANNA. .

PENNSYLVANIA .

02050202 -- SINNEMAHONING. PENNSYLVANIA .

02050203 -- MIDDLE WEST BRANCH SUSQUEHANNA .

PENNSYLVANIA .

02050204 -- BALD EAGLE . PENNSYLVANIA .

02050205 -- PINE . PENNSYLVANIA .

02050206 -- LOWER WEST BRANCH SUSQUEHANNA .

PENNSYLVANIA .

ACCOUNTING UNIT 02050.3 -- LOWER SUSQUEHANNA : THE SUSQUEHANNA RIVER

:BASIN BELOW THE CONFLUENCE WITH THE WEST'

BRANCH SUSQUEHANNA RIVER BASIN. MARYLAND,

PENNSYLVANIA .

CATALOGING UNITS 020503,01 -.- LOWER SUSQUEHANNA-PENNS .

PENNSYLVANIA .

A10
H Y D R 0 L 0 ~G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

SUBREGION 0206 -- UPPED. CHESAPEAKE : THE CHESAPEAKE BAY AND ITS

TRIBUTARY DRAINAGE NORTH OF THE MARYLAND-VIRGINIA

STATE LINE INCLUDING THE POCOMOKE RIVER DRAINAGE,

EXCLUDING THE SUSQUEHANNA AND POTOMAC RIVER BASINS ;

AND THE COASTAL DRAINAGE FROM THE DELAWARE BAY

DRAINAGE BOUNDARY TO CHINCOTEAGUE INLET ON THE

DELMARVA PENINSULA. DELAWARE, MARYLAND, VIRGINIA,

AND :PENNSYLVANIA .

ACCOUNTING UNIT 020600 --- UPPER CHESAPEAKE . DELAWARE, MARYLAND,

VIRGINIA, AND PENNSYLVANIA .

CATALOGING UNITS 02060001 ----

0206000:? ----

CATALOGING UNITS

02050302 -- UPPER JUNIATA. PENNSYLVANIA .

02050303 -- RAYSTOWN . PENNSYLVANIA .

020510304 -- LOWER JUNIATA. PENNSYLVANIA .

0205030!5 -- LOWER SUSQUEHANNA-SWATARA .

PENNSYLVANIA .

02050306 -- LOWER SUSQUEHANNA . MARYLAND,

PENNSYLVANIA .

02,06000,'3 ----

02060004 ----

02060004 ----

02060006 ---

02060007 ----

0206000E ----

02060005) ----

02060010 ----

UPPER CHESAPEAKE BAY. MARYLAND .

CHESTER-SASSAFRAS . DELAWARE,

MARYLAND, PENNSYLVANIA .

GUNPOWDER-PATAPSCO . MARYLAND,

PENNSYLVANIA .

SEVERN . MARYLAND .

CHOPTANK . DELAWARE, MARYLAND .

PATUXENT . MARYLAND .

BLACKWATER-WICOMICO . DELAWARE,

MARYLAND .

NANTICOKE. DELAWARE, MARYLAND .

POCOMOKE . DELAWARE, MARYLAND,

VIRGINIA .

CHINCOTEAGUE . DELAWARE, MARYLAND,

VIRGINIA .

S'UBREGION 0207 -- POTOMAC : THE POTOMAC RIVER BASIN. DISTRICT OF

COLUMBIA, MARYLAND,,PENNSYLVANIA, VIRGINIA, WEST

VIRGINIA .

ACCOUNTING UNIT 020700 --- POTOMAC . DISTRICT OF COLUMBIA, MARYLAND,

PENNSYLVANIA, VIRGINIA, WEST VIRGINIA .

02070001. ---- SOUTH BRANCH POTOMAC . WEST VIRGINIA, ,

VIRGINIA .

02070002 -- NORTH BRANCH POTOMAC . MARYLAND, WEST

VIRGINIA, PENNSYLVANIA .

0'.07000-1 ---- CACAPON-TOWN . MARYLAND,

PENNSYLVANIA, WEST VIRGINIA .
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

02070004 -- CONOCOCHEAGUE-OPEQUON. MARYLAND,

PENNSYLVANIA, VIRGINIA,

WEST VIRGINIA .

02070005 °- SOUTH FORK SHE:NANDOAH . VIRGINIA.

02070006 -- NORTH FORK SHENANDOAH . VIRGINIA,

WEST VIRGINIA .

0207000'7 -- SHENANDOAH . VIRGINIA, WEST VIRGINIA .

02070008 -- MIDDLE POTOMAC-CATOCTIN .

DISTRICT OF COLUMBIA, VIRGINIA,

MARYLAND .

02070009 -- MONOCACY . MARYLAND, PENNSYLVANIA .

02070010 -- MIDDLE POTOMAC-ANACOSTIA-OCCO)QUAN .

DISTRICT OF COLUMBIA, MARYLAND,

VIRGINIA .

02070011 -- LOWER POTOMAC . MARYLAND, VIRGINIA .

SUBREGION 0208 -- LOWER CHESAPEAKE : THE CHESAPEAKE BAY AND ITS

TRIBUTARY DRAINAGE SOUTH OF THE MARYLAND-VIRGINIA

STATE LINE EXCLUDING THE POCOMOKE RIVER DRAINAGE ;

AND THE COASTAL DRAINAGE FROM CHINCOTEAGUE INLET ON

THE DELMARVA PENINSULA TO THE BACK BAY DRAINAGE

BOUNDARY . VIRGINIA, WEST VIRGINIA.

ACCOUNTING UNIT 020801 --- LOWER CHESAPEAKE .--THE CHESAPEAKE BAY AND

ITS TRIBUTARY DRAINAGE SOUTH OF THE

MARYLAND-VIRGINIA STATE LINE EXCLUDING THE

POCOMOKE RIVER DRAINAGE, AND EXCLUDING THE

JAMES RIVER BASIN; THE COASTAL DRAINAGE

FROM CHINCOTEAGUE INLET ON THE DELMARVA

PENINSULA TO THE BACK BAY DRAINAGE

BOUNDARY . VIRGINIA .

CATALOGING UNITS 02080101. -- LOWER CHESAPEAKE BAY. VIRGINIA .

02080102: -- GREAT WICOMICO-PIANKATANK . VIRGINIA .

021 080103 -- RAPIDAN-UPPER RAPPAHANNOCK .

VIRGINIA .

02!080104: -- LOWER RAPPAHANNOCK . VIRGINIA .

022:080105 -- MATTAPONI. VIRGINIA .

02:080106 -- PAMUNKEY . VIRGINIA .

02:080107 -- YORK . VIRGINIA .

02.080108 -- LYNNHAVEN-POQUOSON . VIRGINIA .

02:080109 -- WESTERN LOWER DELMARVA . VIRGINIA,

02080110 -- EASTERN LOWER DELMARVA . VIRGINIA .

ACCOUNTING UNIT 020802. -- JAMES : THE JAMES RIVER BASIN . VIRGINIA,

WEST VIRGINIA .

CATALOGING UNITS 02,080201 -- 'UPPER JAMES . VIRGINIA,

WEST VIRGINIA.

A12
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

02080202 -- MAURY . VIRGINIA .

02080203 -- MIDDLE JAMES-BUFFALO. VIRGINIA.

02080204 -- 'RIVANNA . VIRGINIA .

02080205 -- MIDDLE JAMES-WILLIS . VIRGINIA .

02080206 -- LOWER JAMES . VIRGINIA .

02080207 -- APPOMATTOX . VIRGINIA .

02:080208 -- HAMPTON ROADS . VIRGINIA .

REGION 03 SOUTH ATLANTIC--GULF REGION--THE DRAINAGE THAT ULTIMATELY

DISCHARGES INTO : (A) THE ATLANTIC OCEAN WITHIN AND BETWEEN

THE STATES OF VIRGINIA AND FLORIDA; (B) THE GULF OF MEXICO

WITHIN AND BETWEEN THE STATES OF FLORIDA AND LOUISIANA; AND

(C) THE ASSOCIATED WATERS . INCLUDES ALL OF FLORIDA AND SOUTH

CAROLINA, AND PARTS OF ALABAMA, GEORGIA, LOUISIANA,

MISSISSIPPI, NORTE[CAROLINA, TENNESSEE, AND VIRGINIA .

SUBREGION 0301 -- CHOWAN-ROANOKE : THE COASTAL DRAINAGE AND

ASSOCIATE]) WATERS FROM AND INCLUDING THE BACK BAY

DRAINAGE: '.t'0 OREGON INLET. VIRGINIA, NORTH CAROLINA .

ACCOUNTING UNIT 03010]. --- ROANOKE : THE ROANOKE RIVER BASIN.

NORTH CAROLINA, VIRGINIA .

CATALOGING UNITS 03010101. -- UPPER ROANOKE . VIRGINIA .

030101012 -- MIDDLE ROANOKE . NORTH CAROLINA,

VIRGINIA .

0301010:1 -- UPPER DAN. NORTH CAROLINA,

VIRGINIA .

03010104 -- LOWER DAN . NORTH CAROLINA,

VIRGINIA .

03010105 -- BANISTER. VIRGINIA .

03010106 -- ROANOKE RAPIDS . NORTH CAROLINA,

VIRGINIA .

03010107 -- LOWER ROANOKE. NORTH CAROLINA .

ACCOUNTING UNIT 030102 --- siLBEMARLE-CHOWAN : THE COASTAL DRAINAGE

AND ASSOCIATED WATERS FROM AND INCLUDING

'THE BACK BAY DRAINAGE TO OREGON INLET,

EXCLUDING THE ROANOKE RIVER BASIN.

NORTH CAROLINA, VIRGINIA .

CATALOGING UNITS 03010201 -- NOTTOWAY . NORTH CAROLINA, VIRGINIA .

0301020:? -- BLACKWATER . NORTH CAROLINA,

VIRGINIA .

03010203 -- CHOWAN . NORTH CAROLINA, VIRGINIA .

0301020!3 -- MEHERRIN . NORTH CAROLINIA,

VIRGINIA .

A13
H Y D R O L O G I C UN I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS .AND CATALOGING UNITS (CONTINUED)

03010205 --- ALBEMARLE. NORTH CAROLINA,

VIRGINIA .

SUBREGION 0302 -- NEUSE-PAMLICO: THE COASTAL DRAINAGE AND

ASSOCIATED WATERS FROM OREGON INLET TO BROWNS

INLET . NORTH CAROLINA .

ACCOUNTING UNIT 03020 :1 -- PAMLICO: THE COASTAL DRAINAGE AND

ASSOCIATED WATERS FROM OREGON INLET TO

BROWNS INLET, EXCLUDING THE NEUSE RIVER

BASIN . NORTH CAROLINA .

CATALOGING UNITS 030207.01 -- UPPER TAR. NORTH CAROLINA .

03020102 -- FISHING. NORTH CAROLINA

03020103 -- LOWER TAR. NORTH CAROLINA .

0:3020104 -- PAMLICO. NORTH: CAROLINA

03020105 -- PAMLICO SOUND. NORTH CAROLINA .

03020106 -- BOGUE-CORE SOUNDS . NORTH CAROLINA.

ACCOUNTING UNIT 030202 -- NEUSE : THE NEUSE RIVER BASIN .

NORTH CAROLINA .

CATALOGING UNITS 03020201 -- UPPER NEUSE. NORTH CAROLINA .

03020202 -- MIDDLE NEUSE . NORTH CAROLINA .

0:3020203 -- CONTENTNEA . NORTH CAROLINA .

03020204 -- LOWER NEUSE . NORTH CAROLINA .

SUBREGION 0303 -- CAPE FEAR : THE COASTAL DRAINAGE AND ASSOCIATED

WATERS FROM BROWNS INLET TO AND INCLUDING THE CAPE

FEAR RIVER BASIN. NORTH CAROLINA .

ACCOUNTING UNIT 030300 -- CAPE FEAR . NORTH CAROLINA .

CATALOGING UNITS 03030007. -- NEW . NORTH CAROLINA.

03030002 -- HAW . NORTH CAROLINA .

03030003 °- DEEP . NORTH CAROLINA .

03030004 --- UPPER CAPE FEAR . NORTH CAROLINA .

03030005 -- LOWER CAPE FEAR . NORTH CAROLINA .

03030006 --- BLACK. NORTH CAROLINA .

03030007 --- NORTHEAST CAPE FEAR . NORTH CAROLINA .

SUBREGION 0304 -- PEE DEE : THE COASTAL DRAINAGE AND ASSOCIATED

WATERS FROM THE CAPE FEAR RIVER BASIN BOUNDARY TO

THE SANTEE RIVER BASIN BOUNDARY .

NORTH CAROLINA, SOUTH CAROLINA, VIRGINIA .

ACCOUNTING UNIT 030407. -- UPPER PEE DEE : THE PEE DEE RIVER BASIN

ABOVE BLEWETT FALLS :LAKE DAM.

NORTH CAROLINA, SOUTH CAROLINA, VIRGINIA .

A14
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

CATALOGING UNITS 0304010- L --- UPPER YADKIN . NORTH CAROLINA,

VIRGINIA .

03040102 --- SOUTH YADKIN . NORTH CAROLINA .

03040103 --- LOWER YADKIN . NORTH CAROLINA .

03040104 --- UPPER PEE DEE. NORTH CAROLINA,

SOUTH CAROLINA .

03040105 -- ROCKY . NORTH CAROLINA,

SOUTH CAROLINA .

ACCOUNTING UNIT 030402 --- LOWER PEE DEE : THE COASTAL DRAINAGE AND

ASSOCIATED WATERS FROM THE CAPE FEAR

RIVER BASIN BOUNDARY TO THE SANTEE RIVER

BASIN BOUNDARY, EXCLUDING THE PEE DEE

RIVER BASIN ABOVE BLEWETT FALLS DAM.

NORTH CAROLINA, SOUTH CAROLINA .

CATALOGING UNITS 03040201 -- LOWER PEE DEE. NORTH CAROLINA,

SOUTH CAROLINA .

03040202 --- LYNCHES. NORTH CAROLINA,

SOUTH CAROLINA .

03040203 --- LUMBER . NORTH CAROLINA,

SOUTH CAROLINA .

03040204 --- LITTLE PEE DEE. NORTH CAROLINA,

SOUTH CAROLINA .

03040205 --- BLACK. SOUTH CAROLINA .

03040206 --- WACCAMAW . NORTH CAROLINA,

SOUTH CAROLINA .

03040207 --- CAROLINA COASTAL-SAMPIT .

NORTH CAROLINA, SOUTH CAROLINA .

SUBREGION 0305 -- EDISTO--SANTEE : THE COASTAL DRAINAGE AND ASSOCIATED

WATERS FROM AND INCLUDING THE SANTEE RIVER BASIN TO

THE SAVANNAH RIVER BASIN BOUNDARY . GEORGIA,

NORTH CAROLINA, SOUTH CAROLINA .

ACCOUNTING UNIT 030501 --- SANTEE : THE SANTEE RIVER BASIN.

NORTH CAROLINA, SOUTH CAROLINA .

CATALOGING UNITS 03050101 --- UPPER CATAWBA. NORTH CAROLINA,

SOUTH CAROLINA .

0305010:? --- SOUTH FORK CATAW:BA .

NORTH CAROLINA .

03050103 --- LOWER CATAWBA. NORTH CAROLINA,

SOUTH CAROLINA .

03050104 --- WATEREE. SOUTH CAROLINA.

03050105 --- UPPER BROAD . NORTH CAROLINA,

SOUTH CAROLINA .

03050106 --- LOWER BROAD . SOUTH CAROLINA .

A15
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

030501.07 °- TYGER. SOUTH CAROLINA .

030501.08 -- ENOREE . SOUTH CAROLINA.

030501.09 --- SALUDA . SOUTH CAROLINA .

030501.10 --- CONGAREE . SOUTH CAROLINA .

030501.11 --- LAKE MARION . SOUTH CAROLINA .

030501.12 -- SANTEE . SOUTH CAROLINA .

ACCOUNTING UNIT 030502 -- EDISTO-SOUTH CAROLINA COASTAL : THE

COASTAL DRAINAGE AND ASSOCIATED WATERS

FROM,THE SANTEE RIVER BASIN BOUNDARY TO

THE SAVANNAH RIVER BASIN BOUNDARY .

GEORGIA, SOUTH CAROLINA .

CATALOGING UNITS 03050201 -- COOPER . SOUTH CAROLINA .

03050202 °- SOUTH CAROLINA COASTAL .

SOUTH CAROLINA .

030502,03 -- NORTH FORK EDISTO . SOUTH CAROLINA .

03050204 -- SOUTH FORK EDISTO . SOUTH CAROLINA .

03050205 -- EDISTO . SOUTH CAROLINA .

03050206 -- FOUR HOLE SWAMP. SOUTH CAROLINA .

03050207 -- SALKEHATCHIE . SOUTH CAROLINA ..

03050208 --- BROAD-ST . HELENA . GEORGIA,

SOUTH CAROLINA .

SUBREGION 10306 -- OGEECHEE-SAVANNAH : THE COASTAL DRAINAGE AND

ASSOCIATED WATERS FROM AND INCLUDING THE SAVANNAH

RIVER BASIN TO THE ALTAMAHA RIVER BASIN BOUNDARY .

GEORGIA, NORTH CAROLINA, SOUTH CAROLINA .

ACCOUNTING UNIT 030601 -- SAVANNAH : THE SAVANNAH RIVER BASIN .

GEORGIA, NORTH CAROLINA, SOUTH CAROLINA .

CATALOGING UNITS 03060101 -- SENECA . NORTH CAROLINA,

SOUTH CAROLINA .

03060102 -- TUGAL00. GEORGIA, NORTH CAROLINA,,

SOUTH CAROLINA .

03060103 -- UPPER SAVANNAH . GEORGIA,

SOUTH CAROLINA .

03060104 -- BROAD. GEORGIA.

03060105 -- LITTLE . GEORGIA.

03060106 -- MIDDLE SAVANNAH . GEORGIA,

SOUTH CAROLINA .

Q3060107 -- STEVENS . SOUTH CAROLINA .

03060108 -- BRIER. GEORGIA.

03060109 -- LOWER SAVANNAH . GEORGIA,

SOUTH CAROLINA .

ACCOUNTING UNIT 030602 -- OGEECHEE : THE COASTAL DRAINAGE AND

ASSOCIATED WATERS FROM THE SAVANNAH RIVER

A16
H Y D R O L O G :1 C U N I T C 0 1) E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS,, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

CATALOGING UNITS 03060201 --- UPPER OGEECHEE . GEORGIA.

03060202 --- LOWER OGEECHEE . GEORGIA.

03060203 --- CANOOCHEE . GEORGIA.

03060204 °-- OGEECHEE COASTAL . GEORGIA.

ACCOUNTING UNIT 030701 -- ALTAMAHA : THE ALTAMAHA RIVER BASIN.

GEORGIA.

CATALOGING UNITS 030703.01 --- UPPER OCONEE . GEORGIA.

03070].02 °- LOWER OCONEE . GEORGIA.

030703.03 -- UPPER OCMULGEE . GEORGIA.

030703.04 -- LOWER OCMULGEE . GEORGIA.

030703.05 -- LITTLE OCMULGEE . GEORGIA.

03070106 -- ALTAMAHA. GEORGIA.

03070107 -- OHOOPEE. GEORGIA.

CATALOGING UNITS 03070201 -- SATILLA. GEORGIA.

03070202 -- LITTLE SATILLA. GEORGIA .

03070203 -- CUMBERLAND-ST . SIMONS . GEORGIA .

03070204 -- ST . MARYS . FLORIDA, GEORGIA.

03070205 °- NASSAU . FLORIDA.

ACCOUNTING UNIT 030801 -- ST . JOHNS: THE ST . JOHNS RIVER BASIN .

FLORIDA.

CATALOGING UNITS 03080101 -- UPPER ST . JOHNS . FLORIDA.

03080102 -- OKLAWARA . FLORIDA .

03080103 °- LOWER ST . JOHNS . FLORIDA .

A17

BASIN BOUNDARY TO THE ALTAMAHA RIVER BASIN

BOUNDARY . GEORGIA.

SUBREGION 0307 -- ALTAMAHA - ST MARYS : THE COASTAL DRAINAGE AND

ASSOCIATED WATERS FROM AND INCLUDING THE

ALTAMAHA RIVER BASIN TO THE ST . JOHNS RIVER BASIN

BOUNDARY . FLORIDA, GEORGIA.

ACCOUNTING UNIT 030702 -- ST . MARYS - SATILLA: THE COASTAL DRAINAGE

AND ASSOCIATED WATERS FROM THE ALTAMAHA

RIVER BASIN BOUNDARY TO THE ST . JOHNS

RIVER BASIN BOUNDARY . FLORIDA, GEORGIA.

SUBREGION 0308 -- ST . JOHNS: THE COASTAL DRAINAGE AND ASSOCIATED

'WATERS FROM AND INCLUDING THE ST . JOHNS RIVER BASIN

TO ST . LUCIE: INLET . FLORIDA.

ACCOUNTING UNIT 0308012 -- EAST FLORIDA COASTAL: THE COASTAL

DRAINAGE AND ASSOCIATED WATERS FROM THE

ST . JOHNS RIVER BASIN BOUNDARY TO
H Y D R 0 L 0 G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

ST . LUCIE INLET . FLORIDA.

CATALOGING UNITS 030802;01 -- DAYTONA - ST . AUGUSTINE. FLORIDA

030802;02 -- CAPE CANAVERAL . FLORIDA.

03080203 °- VERO BEACH. FLORIDA.

SUBREGION 0309 -- SOUTHERN FLORIDA: THE COASTAL DRAINAGE AND

ASSOCIATED WATERS FROM ST . LUCIE INLET TO AND

INCLUDING THE CALOOSAHATCHEE RIVER BASIN, AND

INTERIOR DRAINAGE SOUTH OF THE ST . JOHNS AND PEACE

RIVER BASINS . FLORIDA.

ACCOUNTING UNIT 030901 -- KISSIMMEE: THE KISSIMMEE RIVER BASIN AIM

INTERIOR DRAINAGE INTO LAKE OKEECHOBEE

FROM THE NORTH. FLORIDA.

CATALOGING UNITS 030901.01 -- KISSIMMEE . FLORIDA.

030901.02 -- NORTHERN OKEECHOBEE INFLOW . FLORIDA.

030901,03 -- WESTERN OKEECHOBEE INFLOW . FLORIDA.

ACCOUNTING UNIT 030902 -- SOUTHERN FLORIDA: THE COASTAL DRAINAGE AND

ASSOCIATED WATERS FROM ST . LUCIE INLET TO

AND INCLUDING THE CALOOSARATCHEE RIVER

BASIN, AND INTERIOR DRAINAGE SOUTH OF THE

ST . JOHNS AND PEACE RIVER BASINS,

EXCLUDING THE KISSIMMEE RIVER BASIN AND

INTERIOR DRAINAGE INTO LAKE OKEECHOBEE

FROM THE NORTH. FLORIDA.

CATALOGING UNITS 03090201 -- LAKE OKEECHOBEE . FLORIDA.

03090202 -- EVERGLADES . FLORIDA.

03090203 -- FLORIDA BAY-FLORIDA KEYS . FLORIDA .

03090204 -- BIG CYPRESS SWAMP . FLORIDA.

03090205 -- CALOOSAHATCHEE . FLORIDA.

SUBREGION 0310 -- PE:ACE--TAMPA BAY : THE COASTAL DRAINAGE AND

ASSOCIATED WATERS FROM THE CALOOSAHATCHEE RIVER

BILSIN BOUNDARY TO AND INCLUDING THE WITHLACOOCHEE

RIVER BASIN . FLORIDA.

ACCOUNTING UNIT 03]_001 -- PEACE : THE COASTAL DRAINAGE AND ASSOCIATED

WATERS FROM THE CALOOSARATCHEE

RIVER BASIN BOUNDARY TO GASPARILLA PASS .

FLORIDA.

CATALOGING UNITS 03100101 -- PEACE. FLORIDA.

031LOO102 -- MYAKKA . FLORIDA.

03100103 CHARLOTTE HARBOR . FLORIDA.

A18
H Y D R O L O G I C U N I T C O D E S

ACCOUNTING UNIT 031200 -- OCHLOCKONEE . FLORIDA. GEORGIA.

A19

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

ACCOUNTING UNIT 031002 --- TAMPA BAY : THE COASTAL DRAINAGE AND

ASSOCIATED WATERS FROM GASPARILLA PASS TO AND

INCLUDING THE WITHLACOOCHEE RIVER BASIN . FLORIDA.

CATALOGING UNITS 03100201 -- SARASOTA BAY . FLORIDA .

03100202 -- MANATEE. FLORIDA .,

03100203 -- LITTLE MANATEE . FLORIDA.

03100204 -- ALAFIA . FLORIDA.

C13100205 -- HILLSBOROUGH . FLORIDA .

03100206 -- TAMPA BAY . FLORIDA.

03100207 -- CRYSTAL-PITHLACHASCOTEE . FLORIDA.

03100208 -- WITHLACOOCHEE . FLORIDA.

SUBREGION 031.1 -- SUWPJNNEE : THE COASTAL DRAINAGE AND ASSOCIATED

WATERS FROM THE WITHLACOOCHEE RIVER BASIN BOUNDARY

TO PJRD INCLUDING THE AUCILLA RIVER BASIN . FLORIDA,

GEORGIA.

ACCOUNTING UNIT 031101 -- AUCILLA-WACCASASSA : THE COASTAL DRAINAGE

AND ASSOCIATED WATERS FROM THE

WITHLACOOCHEE RIVER BASIN BOUNDARY TO AND

INCLUDING THE AUCILLA RIVER BASIN,

EXCLUDING THE SUWANNEE RIVER BASIN.

FLORIDA, GEORGIA .

CATALOGING UNITS 0.3110101 -- WACCASASSA . FLORIDA.

03110102 -- ECONFINA-STEINHATCHEE . FLORIDA.

0.3110103 -- AUCILLA. FLORIDA GEORGIA.

ACCOUNTING UNIT 031102 -- SUWANNEE : THE SUWANNEE RIVER BASIN.

FLORIDA, GEORGIA.

CATALOGING UNITS 03110201 -- UPPER SUWANNEE . FLORIDA, GEORGIA.

03110202 -- ALAPAHA . FLORIDA,, GEORGIA.

03110203 -- WITHLACOOCHEE . FLORIDA, GEORGIA.

03110204 -- LITTLE . GEORGIA.

03110205 -- LOWER SUWANNEE . FLORIDA.

03110206 -- SANTA FE . FLORIDA.

SUBREGION 033.2 -- OOHLOCKONEE : THE COASTAL DRAINAGE AND ASSOCIATED

WATERS FROM THE AUCILLA RIVER BASIN BOUNDARY TO AND

INCLUDING THE OCHLOCKONEE RIVER BASIN. FLORIDA,

GEORGIA.

CATALOGING UNITS 03120001 -- APALACHEE BAY-ST . MARKS. FLORIDA,

GEORGIA.

03120002 -- UPPER OCHLOCKONEE . GEORGIA.
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

03120003 -- LOWER OCHLOCKONEE . FLORIDA,

GEORGIA.

SUBREGION 0313 -- APALACHICOLA : THE COASTAL DRAINAGE AND

ASSOCIATED WATERS FROM THE OCHLOCKONEE RIVER BASIN

BOUNDARY TO AND INCLUDING THE APALACHICOLA RIVER

BASIN AND THE DRAINAGE INTO APALACHICOLA BAY .

ALABAMA, FLORIDA, GEORGIA.

ACCOUNTING UNIT 031.300 -- APALACHICOLA . ALABAMA, FLORIDA,

GEORGIA.

CATALOGING UNITS 031.30001 -- UPPER CHATTAHOOCHEE. GEORGIA.

031.30002 -- MIDDLE CHATTAHOOCHEE-LAKE HARDING.

ALABAMA, GEORGIA.

031.30003 -- MIDDLE CHATTAHOOCHEE-WALTER F .

GEORGE RESERVOIR. ALABAMA, GEORGIA.

031.3001(14 -- LOWER CHATTAHOOCHEE. ALABAMA,

FLORIDA, GEORGIA.

031.30005 -- UPPER FLINT . GEORGIA .

031.30006 -- MIDDLE FLINT. GEORGIA.

031,30007 -- KINCHAFOONEE-MUCKALEE . GEORGIA.

03130008 -- LOWER FLINT. GEORGIA.

03130009 -- ICHAWAYNOCHAWAY . GEORGIA.

0313001.0 -- SPRING . GEORGIA.

03130011 -- APALACHICOLA . FLORIDA, GEORGIA.

03130012 -- CHIPOLA. ALABAMA, FLORIDA.

03130013 -- NEW. FLORIDA.

03130014 -- APALACHICOLA BAY. FLORIDA.

SUBREGION 0314 -- CHOCTAWHA'.PCHEE - ESCAMBIA : THE COASTAL DRAINAGE AND

ASSOCIATED WATERS FROM THE APALACHICOLA BAY

DRAINAGE BOUNDARY TO THE MOBILE BAY DRAINAGE

BOUNDARY . ALABAMA, FLORIDA.

ACCOUNTING UNIT 031401 -- FLORIDA PANHANDLE COASTAL: THE COASTAL

DRAINAGE AND ASSOCIATED WATERS FROM THE

APALACHICOLA BAY DRAINAGE BOUNDARY TO THE.

MOBILE BAY DRAINAGE BOUNDARY, EXCLUDING

THE CHOCTAWHATCHEE AND ESCAMBIA RIVER

BASINS . ALABAMA, FLORIDA, GEORGIA.

CATALOGING UNITS 03140101 -- ST . ANDREW-ST . JOSEPH BAYS . FLORIDA.

03140102 -- CHOCTAWHATCHEE BAY . FLORIDA.

03140103 -° YELLOW . ALABAMA, FLORIDA.

03140104 -° BLACKWATER . ALABAMA, FLORIDA.

03140105 -° PENSACOLA BAY . FLORIDA.

03140106 -° PERDIDO. ALABAMA, FLORIDA .

0314010'7 -- PERDIDO BAY. ALABAMA, FLORIDA.

A20
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING 'UNITS AND CATALOGING UNITS (CONTINUED)

ACCOUNTING UNIT 031402 -- CHOCTAWHATCHEE : THE CHOCTAWHATCHEE RIVER

BASIN. ALABAMA, FLORIDA.

CATALOGING UNITS 03140201 -- UPPER CHOCTAWHATCHEE . ALABAMA.

03140202 -- PEA. ALABAMA, FLORIDA.

03140203 -- LOWER CHOCTAWHATCHEE . ALABAMA,

FLORIDA.

ACCOUNTING UNIT 031403 -- ESCAMBIA : THE ESCAMBIA RIVER BASIN.

ALABAMA, FLORIDA.

CATALOGING UNITS 03140301 -- UPPER CONECUH. ALABAMA.

03140302 -- PATSALIGA. ALABAMA.

03140303 -- SEPULGA. ALABAMA.

03140304 -- LOWER CONECUH. ALABAMA, FLORIDA.

03140305 °- ESCAMBIA . ALABAMA, FLORIDA.

SUBREGION 031.5 -- ALABAMA: THE ALABAMA RIVER BASIN . ALABAMA, GEORGIA,

TENNESSEE .

ACCOUNTING UNIT 031501 -- COOSA-TALLAPOOSA : THE ALABAMA RIVER BASIN

ABOVE THE CONFLUENCE OF AND INCLUDING THE

COOSA AND TALLAPOOSA RIVER BASINS .

ALABAMA, GEORGIA, TENNESSEE .

CATALOGING UNITS 03150101 -- CONASAUGA. .GEORGIA, TENNESSEE.

03150102 -- COOSAWATTEE . GEORGIA.

03150103 -- OOSTANAULA . GEORGIA.

03150104 -- ETOWAH . GEORGIA.

03150105 -- UPPER COOSA. ALABAMA, GEORGIA.

03150106 -- MIDDLE COOSA. ALABAMA.

03150107 -- LOWER COOSA. ALABAMA.

03150108 -- UPPER TALLAPOOSA . ALABAMA,

GEORGIA.

03150109 -- MIDDLE TALLAPOOSA . ALABAMA.

03150110 -- LOWER TALLAPOOSA . ALABAMA.

ACCOUNTING UNIT 031502 -- ALABAMA: THE ALABAMA RIVER BASIN BELOW THE

CONFLUENCE OF THE COOSA AND TALLAPOOSA

RIVER BASINS . ALABAMA.

CATALOGING UNITS 03150201 -- UPPER ALABAMA . ALABAMA.

03150202 -- CAHABA . ALABAMA.

03150203 -- MIDDLE ALABAMA. ALABAMA.

03150204 -- LOWER ALABAMA . ALABAMA .

SUBREGION 031.6 -- MOBILE - TOMBIGBEE : THE DRAINAGE INTO MOBILE BAY

EXCLUDING THE ALABAMA RIVER BASIN. ALABAMA,

A21
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

MISSISSIPPI .

ACCOUNTING UNIT 031601 -- BLACK WARRIOR - TOMBIGBEE: THE

T'OMBIGBEE RIVER BASIN ABOVE THE CONFLUENCE

WITH AND INCLUDING THE BLACK WARRIOR RIVER

BASIN . ALABAMA, MISSISSIPPI .

CATALOGING UNITS 03160101 -- UPPER TOMBIGBEE . ALABAMA,

MISSISSIPPI .

0316010'2 -- TOWN . MISSISSIPPI .

03160103 -- BUTTAHATCHEE . ALABAMA,

MISSISSIPPI .

03160104 -- TIBBEE . MISSISSIPPI .

03160105 -- LUXAPALLILA . ALABAMA,

MISSISSIPPI .

03160106 -- MIDDLE TOMBIGBEE-LUBBUB . ALABAMA,

MISSISSIPPI .

03160107 -- SIPSEY . ALABAMA.

03160108 -- NOXUBEE. ALABAMA, MISSISSIPPI .

03160109 -- MULBERRY . ALABAMA.

031601:1.0 -- SIPSEY FORK . ALABAMA.

0316011.1 -- LOCUST . ALABAMA.

031601:1.2 -- UPPER BLACK WARRIOR. ALABAMA.

031.601:1.3 -- LOWER BLACK WARRIOR. ALABAMA.

ACCOUNTING UNIT 031.602 -- MOBILE BAY - TOMBIGBEE : THE DRAINAGE INTO

MOBILE BAY EXCLUDING THE ALABAMA RIVER

BASIN, THE TOMBIGBEE RIVER BASIN ABOVE THE

CONFLUENCE WITH THE BLACK WARRIOR RIVER

AND THE BLACK WARRIOR RIVER BASIN.

ALABAMA, MISSISSIPPI .

CATALOGING UNITS 031.60201 -- MIDDLE TOMBIGBEE-CHICKASAW .

ALABAMA, MISSISSIPPI .

031.60202 -- SUCARNOOCHEE . ALABAMA, MISSISSIPPI .

031.60203 -- LOWER TOMBIGBEE . ALABAMA.

031.60204 -- MOBILE - TENSAW . ALABAMA.

031.60205 -- MOBILE BAY. ALABAMA.

SUBREGION 0317 -- PASCAGOULA : THE COASTAL DRAINAGE AND ASSOCIATED

WATERS IN ALABAMA AND MISSISSIPPI NORTH AND EAST

OF' THE: LOUISIANA-MISSISSIPPI STATE LINE FROM THE

MOBILE BAY DRAINAGE BOUNDARY TO THE PEARL RIVER

BASIN BOUNDARY . ALABAMA, MISSISSIPPI .

ACCOUNTING UNIT 031.700 -- PASCAGOULA . ALABAMA, MISSISSIPPI .

CATALOGING UNITS 031.70001 -= CHUNKY-OKATIBBEE . MISSISSIPPI .

031.70002 -- UPPER CHICKASAWHAY . ALABAMA,

A22
REGION 04

CATALOGING UNITS

SUBREGION

H Y D R O L O G I C

03170003 --

03170004 --

0317000`i --

03170006 --

03170007 --

03170008 --

03170009 --

U N 7[ T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

MISSISSIPPI .

LOWER CHICKASAWHAY . ALABAMA,

MISSISSIPPI .

UPPER LEAF . MISSISSIPPI .

LOWER LEAF . MISSISSIPPI .

PASCAGOULA . MISSISSIPPI .

BLACK. MISSISSIPPI .

ESCATAWPA. ALABAMA, MISSISSIPPI .

MISSISSIPPI COASTAL . ALABAMA,

MISSISSIPPI .

SUBREGION 0,318 -- PEARL : THE PEARL RIVER BASIN. LOUISIANA,

MISSISSIPPI .

ACCOUNTING UNIT 031800 --- PEARL . LOUISIANA, MISSISSIPPI .

03180001 -- UPPER PEARL. MISSISSIPPI .

03180002 -- MIDDLE PEARL-STRONG . MISSISSIPPI .

03180003 -- MIDDLE PEARL-SILVER . MISSISSIPPI .

03180004 -- LOWER PEARL. LOUISIANA, MISSISSIPPI .

03180005 -- BOGUE CHITTO . LOUISIANA,

MISSISSIPPI .

GREAT LAKES REGION --- THE DRAINAGE WITHIN TIRE UNITED STATES

THAT ULTIMATELY DISCHARGES INTO : (A) THE GREAT LAKES

SYSTEM, INCLUDING THE LAKE SURFACES, BAYS, AND ISLANDS; AND

(B) THE ST . LAWRENCE RIVER TO THE RIVIERE RICHELIEU DRAINAGE

BOUNDARY . INCLUDES PARTS OF ILLINOIS, INDIANA,

MICHIGAN, MINNESOTA, NEW YORK, OHIO, PENNSYLVANIA, AND

WISCONSIN.

0401 -- WESTERN :LAKE SUPERIOR : THE DRAINAGE INTO LAKE

SUPERIOR WITHIN THE UNITED STATES FROM THE ONTARIO-

. MINNESOTA INTERNATIONAL BOUNDARY TO AND INCLUDING

THE MONTREAL RIVER BASIN . MICHIGAN, MINNESOTA,

WISCONSIN .

ACCOUNTING UNIT 040101 -° NORTHWESTERN LAKE SUPERIOR : THE DRAINAGE

INTO LAKE SUPERIOR WITHIN THE UNITED

STATES FROM THE ONTARIO-MINNESOTA

INTERNATIONAL BOUNDARY TO THE ST . LOUIS

RIVER BASIN BOUNDARY . MINNESOTA.

CATALOGING UNITS 04010101 -- BAPTISM--BRULE . MINNESOTA.

0401010:? -- BEAVER-LESTER. MINNESOTA.

ACCOUNTING UNIT 040102 -- ST . LOUIS : THE ST . LOUIS RIVER BASIN .

A23
HYL1R0L0GIC UN IT CODES

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS; AND CATALOGING UNITS (CONTINUED)

MINNESOTA, WISCONSIN.

CATALOGING UNITS 04010201 -- ST . LOUIS . MINNESOTA, WISCONSIN.

04010202 -- CLOQUET . MINNESOTA.

ACCOUNTING UNIT 040103 -- SOUTHWESTERN LAKE SUPERIOR : THE DRAINAGE

INTO LAKE SUPERIOR FROM THE ST . LOUIS

RIVER BASIN BOUNDARY TO AND INCLUDING

THE,MONTREAL RIVER BASIN. MICHIGAN,

MINNESOTA, WISCONSIN.

CATALOGING UNITS 04010:301 -- BEARTRAP-NEMADJI . MINNESOTA,

WISCONSIN.

04010302 -- BAD-MONTREAL . MICHIGAN, WISCONSIN.

SUBREGION 0402 -- SOUTHERN LAKE SUPERIOR-LAKE SUPERIOR: THE DRAINAGE

INTO LAKE SUPERIOR WITHIN THE UNITED STATES FROM

THE MONTREAL RIVER BASIN BOUNDARY TO THE SOO LOCKS

AT SAULT SAINTE MARIE, AND LAKE SUPERIOR WITHIN THE

UNITED STATES, INCLUDING ITS BAYS AND ISLANDS.

MICHIGAN, MINNESOTA, WISCONSIN .

ACCOUNTING UNIT 040201 -- SOUTHCENTRAL LAKE SUPERIOR: THE DRAINAGE

INTO LAKE SUPERIOR FROM THE MONTREAL RIVER

BASIN BOUNDARY TO AND INCLUDING THE CARP

RIVER BASIN. MICHIGAN, WISCONSIN.

CATALOGING UNITS 040201.01 -- BLACK-PRESQUE ISLE . MICHIGAN,

WISCONSIN .

04020:1.02 -- ONTONAGON . MICHIGAN, WISCONSIN.

040201.03 -- KEWEENAW PENINSULA. MICHIGAN .

040201.04 -- STURGEON . MICHIGAN .

04020:1.05 -- DEAD-KELSEY . MICHIGAN .

ACCOUNTING UNIT 040202 -- SOUTHEASTERN LAKE SUPERIOR : THE DRAINAGE

INTO LAKE SUPERIOR WITHIN THE UNITED

STATES FROM THE CARP RIVER BASIN BOUNDARY

TO THE SOO LOCKS AT SAULT SAINTE MARIE.

MICHIGAN .

CATALOGING UNITS 04020201 -- BETSY-CHOCOLAY . MICHIGAN .

040202,02 -- TAHQUAMENON . MICHIGAN .

04020203 -- WAISKA . MICHIGAN .

ACCOUNTING UNIT 040203 -- LAKE SUPERIOR : LAKE SUPERIOR WITHIN THE,

UNITED STATES, INCLUDING ITS BAYS AND

ISLANDS . MICHIGAN, MINNESOTA,, WISCONSIN .

CATALOGING UNIT 04020:300 -- LAKE SUPERIOR . MICHIGAN . MINNESOTA,

A2 4
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

WISCONSIN.

SUBREGION 0403 -- NORTHWESTERN LAKE MICHIGAN : THE DRAINAGE INTO

LAKE MICHIGAN FROM THE MILWAUKEE RIVER BASIN

BOUNDARY TO THE MANISTIQUE RIVER BASIN BOUNDARY .

MICHIGAN, WISCONSIN .

ACCOUNTING UNIT 040301 --- NORTHWESTERN LAKE MICHIGAN : THE DRAINAGE

INTO LAKE MICHIGAN FROM THE MILWAUKEE

RIVER BASIN BOUNDARY TO THE MANISTIQUE

RIVER BASIN BOUNDARY, EXCLUDING THE FOX

RIVER BASIN. MICHIGAN, WISCONSIN.

CATALOGING UNITS 04030101 -- MANITOWOC-SHEBOYGAN . WISCONSIN .

04030102 -- DOOR-KEWAUNEE . WISCONSIN.

04030103 -- DUCK-PENSAUKEE . WISCONSIN

04030104 -- OCONTO . WISCONSIN .

04030105 -- PESHTIGO . WISCONSIN .

040301061 -- BRULE. MICHIGAN, WISCONSIN.

04030107 -- MICHIGAMME . MICHIGAN .

04!03101063 -- MENOMINEE. MICHIGAN, WISCONSIN.

041030103 -- CEDAR-FORD . MICHIGAN .

0440301].0 -- ESCANABA . MICHIGAN .

04103011.1 -- TACOOSH-WHITEFISH . MICHIGAN .

0403011.2 -- FISHDAM-STURGEON . MICHIGAN .

ACCOUNTING UNIT 040302 -- FOX : THE FOX RIVER BASIN . WISCONSIN .

CATALOGING UNITS 04030201. -- UPPER FOX. WISCONSIN.

04,030202 -- WOLF . WISCONSIN .

04030203 -- LAKE WINNEBAGO. WISCONSIN.

04030204 -- LOWER FOX . WISCONSIN

SUBREGION 0404 -- SOUTHWESTERN LAKE MICHIGAN . THE DRAINAGE INTO LAKE

MICHIGAN FROM THE ST . JOSEPH RIVER BASIN BOUNDARY

TO AND INCLUDING THE MILWAUKEE RIVER BASIN.

ILLINOIS, INDIANA, MICHIGAN, WISCONSIN.

ACCOUNTING UNIT 040400 -- SOUTHWESTERN LAKE MICHIGAN . ILLINOIS,

INDIANA, MICHIGAN, WISCONSIN.

CATALOGING UNITS 04040001. -- LITTLE CALUMET-GALIEN . ILLINOIS,

INDIANA, MICHIGAN .

04040002 -- PIKE-ROOT. ILLINOIS, WISCONSIN.

04040003 -- MILWAUKEE . WISCONSIN.

SUBREGION 0405 -- SOUT'H'EASTERN LAKE MICHIGAN : THE DRAINAGE INTO LAKE

MICHIGAN FROM AND INCLUDING THE ST . JOSEPH RIVER

BASIN TO AND INCLUDING THE GRAND RIVER BASIN .

A25
BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

ACCOUNTING UNIT 040500 --- SOUTHEASTERN LAKE MICHIG=AN . INDIANA,

MICHIGAN .

CATALOGING UNITS

SUBREGION

H Y D R O L O G I C U N I T C O D E S

INDIANA,, MICHIGAN .

04050001 -- ST . JOSEPH . INDIANA, MICHIGAN .

04050002 -- BLACK-MACATAWA . MICHIGAN .

04050003 -- KALAMAZOO. MICHIGAN .

04050004 -- UPPER GRAND. MICHIGAN .

04050005 °- MAPLE . MICHIGAN .

04050006 °- LOWER GRAND. MICHIGAN .

04050007 -- THORNAPPLE . MICHIGAN .

0406 °- NORTHEASTERN LAKE MICHIGAN-LAKE MICHIGAN : THE

DRAINAGE: INTO LAKE MICHIGAN FROM THE GRAND RIVER

ACCOUNTING UNIT 040601. --- NORTHEASTERN LAKE MICHIGAN : THE DRAINAGE

INTO LAKE MICHIGAN FROM THE GRAND RIVER

BASIN BOUNDARY TO AND INCLUDING THE

MANISTIQUE RIVER BASIN . MICHIGAN .

CATALOGING UNITS 04060101 --

04060102 -_

04060103 --

04060104 --

04060105 --

04060106 --

04060107 --

PERE MARQUETTE-WHITE. MICHIGAN .

MUSKEGON . MICHIGAN .

MANISTEE . MICHIGAN .

BETSIE-PLATTE . MICHIGAN .,

BOARDMAN-CHARLEVOIX . MICHIGAN .

MANISTIQUE . MICHIGAN .

BREVOORT-MILLECOQUINS. MICHIGAN .

ACCOUNTING UNIT 040602 --- LAKE MICHIGAN : LAKE MICHIGAN, INCLUDING

ITS BAYS AND ISLANDS. ILLINOIS, INDIANA,

MICHIGAN, WISCONSIN.

CATALOGING UNIT 04060200 -- LAKE MICHIGAN . ILLINOIS, INDIANA,

MICHIGAN, WISCONSIN.

SUBREGION 0407 -- NORTHWESTERN LAKE HURON: THE DRAINAGE INTO LAKE

HURON WITHIN THE UNITED STATES FROM THE SOO LOCKS

AT SAULT SAINTE MARIE TO AND INCLUDING THE AU SABLE

RIVER BASIN. MICHIGAN .

ACCOUNTING UNIT 040'700 --- NORTHWESTERN LAKE HURON . MICHIGAN .

CATALOGING UNITS 04070001 -= ST . MARYS . MICHIGAN .

04070002 -- CARP-PINE . MICHIGAN .

A2 6

BASIN BOUNDARY TO AND INCLUDING THE MANISTIQUE

RIVER BASIN, AND LAKE MICHIGAN, INCLUDING ITS BAYS AND

ISLANDS. ILLINOIS, INDIANA, MICHIGAN,

WISCONSIN.
H Y D R O L O G I C U N I T C O D E S

SUBREGION 0408 -- SOUTHWESTERN LACE HURON-LAKE HURON : THE DRAINAGE

INTO LAKE HURON WITHIN THE UNITED STATES, FROM THE

AU SABLE 'RIVER BASIN BOUNDARY TO THE ST . CLAIR

RIVER :BASIN BOUNDARY AT THE MOUTH OF LAKE HURON,

AND LAKE 'HURON WITHIN THE UNITED STATES, INCLUDING

ITS BAYS AND ISLANDS. MICHIGAN .

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

04070003 -- LONE LAKE-OCQUEOC . MICHIGAN .

04070004 -- CHEBOYGAN. MICHIGAN .

04070005 -- BLACK. MICHIGAN .

040'70006 -- THUNDER BAY. MICHIGAN .

04070007 -- AU SABLE. MICHIGAN .

ACCOUNTING UNIT 040801 - SOUTHWESTERN LAKE HURON: THE DRAINAGE INTO

LAKE HURON WITHIN THE UNITED STATES FROM THE

AU SABLE RIVER BASIN BOUNDARY TO THE

ST . CLAIR RIVER BASIN BOUNDARY AT THE

MOUTH OF LAKE HURON, EXCLUDING THE

SAGINAW RIVER BASIN. MICHIGAN .

CATALOGING UNITS 04080101 -- AU GRES-RIFLE . MICHIGAN .

040801102 -- KAWKAWLIN-PINE . MICHIGAN .

040801 03 -- PIGEON-WISCOGGIN . MICHIGAN .

04080104 -- BIRCH-WILLOW . MICHIGAN .

ACCOUNTING UNIT 040802 --- ;SAGINAW : THE SAGINAW RIVER BASIN.

MICHIGAN .

CATALOGING UNITS 04080201 -- TITTABAWASSEE. MICHIGAN .

04080202 -- PINE . MICHIGAN .

04080203 -- SHIAWASSEE . MICHIGAN .

04080204 -- FLINT. MICHIGAN .

04080205 -- CASS . MICHIGAN .

04080206 -- SAGINAW. MICHIGAN .

CATALOGING UNIT 04080300 -- LAKE HURON. MICHIGAN .

ACCOUNTING UNIT 040803 -- ]LAKE HURON: LAKE HURON WITHIN THE;

UNITED STATES, INCLUDING ITS BAYS AND

ISLANDS . MICHIGAN .

SIJBREGION 0409 -- ST . CLAIR-DETROIT : THE ST . CLAIR AND DETROIT RIVER

BASINS WITHIN THE UNITED STATES FROM THE MOUTH OF

LAKE HURON TO AND INCLUDING THE HURON RIVER 'BASIN,

AND :LAKE ST . CLAIR WITHIN THE UNITED STATES .

MICHIGAN . .

ACCOUNTING UNIT 040900 --- ST . CLAIR-DETROIT . MICHIGAN .

A27
H Y D R 0 L 0 G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

CATALOGING UNITS 04090001 -- ST . CLAIR. MICHIGAN .

04090002 -- LAKE ST . CLAIR. MICHIGAN .

04090003 -- CLINTON. MICHIGAN .

04090004 -- DETROIT. MICHIGAN .

04090005 -- HURON. MICHIGAN .

SUBREGION 0410 -- VMSTERN LAKE ERIE : THE DRAINAGE INTO LAKE ERIE FROM

THE HURON RIVER BASIN BOUNDARY TO AND INCLUDING THE

V'E'RMILION RIVER BASIN. INDIANA, MICHIGAN, OHIO .

ACCOUNTING UNIT 041000 -- WESTERN LAKE ERIE . INDIANA, MICHIGAN,

OHIO .

CATALOGING UNITS 04100001 -- OTTAWA-STONY . MICHIGAN, OHIO .

04100002 -- RAISIN . MICHIGAN, OHIO .

04100003 -- ST . JOSEPH . INDIANA, MICHIGAN, OHIO .

04100004 -- ST . MARYS. INDIANA, OHIO

04100005 -- UPPER MAUMEE . INDIANA, OHIO .

04100006 -- TIFFIN . MICHIGAN, OHIO .

04100007 -- AUGLAIZE . INDIANA, OHIO .

04100008 -- BLANCHARD. OHIO .

04100009 -- LOWER MAUMEE . OHIO .

04100010 -- CEDAR-PORTAGE . OHIO .

04100011 -- SANDUSKY . OHIO .

04100012 -- HURON-VERMILION. OHIO .

SUBREGION 0411 -- SOUTHERN LAKE ERIE : THE DRAINAGE INTO LAKE ERIE

FROM THE VERMILION RIVER BASIN BOUNDARY TO AND

INCLUDING THE ASHTABULA RIVER BASIN . OHIO,

PENNSYLVANIA .

ACCOUNTING UNIT 041100 --- SOUTHERN LAKE ERIE . OHIO, PENNSYLVANIA .

CATALOGING UNITS 0411 0001 -- BLACK-ROCKY . OHIO .

04110002 -- CUYAHOGA . OHIO .

04110003 -- ASHTABULA-CHAGRIN . OHIO,

PENNSYLVANIA .

04110004 -- GRAND. OHIO .

SUBREGION 0412 -- EASTERN LAKE ERIE-LAKE ERIE : THE DRAINAGE INTO LAKE

ERIE WITHIN THE: UNITED STATES FROM THE ASHTABULA

RIVER BASIN BOUNDARY TO AND INCLUDING THE

NIAGARA RIVER BASIN, AND LAKE ERIE WITHIN THE

UNITED STATES, INCLUDING ITS BAYS AND ISLANDS .

MICHIGAN, NEW YORK, OHIO, PENNSYLVANIA .

ACCOUNTING UNIT 041201 --- EASTERN LAKE ERIE : THE DRAINAGE: INTO LAKE

ERIE- WITHIN THE UNITED STATES FROM THE

ASHTABULA RIVER BASIN BOUNDARY TO AND

A2 8
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

INCLUDING THE NIAGARA RIVER BASIN.

NEW YORK, OHIO, PENNSYLVANIA .

CATALOGING UNITS 04120101 -- CHAUTAUQUA-CONNEAUT . NEW YORK, OHIO,

PENNSYLVANIA .

04120102 -- CATTARAUGUS . NEW YORK .

04120103 -- BUFFALO-EIGHTEENMILE . NEW YORK .

04120104 -- NIAGARA. NEW YORK .

ACCOUNTING UNIT 041202 -- LAKE ERIE : LAKE ERIE WITHIN THE

UNITED STATES, INCLUDING ITS BAYS AND

ISLANDS. MICHIGAN, NEW YORK, OHIO,

PENNSYLVANIA .

CATALOGING UNIT 04120200 -- LAKE ERIE . MICHIGAN, NEW YORK, OHIO,

PENNSYLVANIA .

SUBREGION 0413 -- SOUTHEASTERN LAKE ONTARIO THE DRAINAGE INTO

LAKE ONTARIO FROM THE NIAGARA RIVER BASIN

BOUNDARY TO AND INCLUDING THE GENESEE RIVER BASIN.

NEW YORK, PENNSYLVANIA .

ACCOUNTING UNIT 041300 -- SOUTHWESTERN LAKE ONTARIO . NEW YORK,

PENNSYLVANIA .

CATALOGING UNITS 04130001 -- OAK ORCHARD-TWELVEMILE . NEW YORK .

04130002 -- UPPER GENESEE. NEW YORK,

PENNSYLVANIA .

04130003 -- LOWER GENESEE. NEW YORK .

SUBREGION 0414 -- SOUTHEASTERN LAKE ONTARIO : THE DRAINAGE INTO

LAKE: ONTARIO FROM THE GENESEE RIVER BASIN BOUNDARY

TO AND INCLUDING THE STONY CREEK BASIN . NEW YORK .

ACCOUNTING UNIT 041403. -- SOUTHEASTERN LAKE ONTARIO: THE DRAINAGE

INTO LAKE ONTARIO FROM THE GENESEE RIVER

BASIN BOUNDARY TO AND INCLUDING THE

STONY CREEK BASIN, EXCLUDING THE OSWEGO

RIVER BASIN . NEW YORK .

CATALOGING UNITS 04140101 -- IRONDEQUOIT-NINEMILE . NEW YORK .

04,140102 -- SALMON-SANDY . NEW YORK .

ACCOUNTING UNIT 041402: -- OSWEGO : THE OSWEGO RIVER BASIN . NEW YORK .

CATALOGING UNITS 04:140201 -- SENECA . NEW YORK

04:140202 -- ON:EIDA . NEW YORK

04:140203 -- OSWEGO . NEW YORK
H Y It R 0 L 0 G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

SUBREGION 0415 -- NORTHEASTERN' LAKE ONTARIO-LAKE

ON'TARIO-S'T . LAWRENCE :THE DRAINAGE INTO

LAKE ONTARIO AND THE ST . LAWRENCE RIVER BASIN

WITHIN THE UNITED STATES FROM THE STONY CREEK

BASIN BOUNDARY TO AND INCLUDING THE ENGLISH RIV13R

BASIN, AND LAKE ONTARIO WITHIN THE UNITED STATES,

INCLUDING ITS BAYS AND ISLANDS. NEW YORK .

ACCOUNTING UNIT 041.501 -- :NORTHEASTERN LAKE ONTARIO : THE DRAINAGE

INTO LAKE ONTARIO FROM THE STONY CREEK

BASIN BOUNDARY TO THE DRAINAGE BOUNDARY OF

THE ST . LAWRENCE RIVER AT THE MOUTH OF

LAKE ONTARIO . NEW YORK .

CATALOGING UNITS; 04150101 °- BLACK. NEW YORK .

04150102 --- CHAUMONT-PERCH . NEW YORK .

ACCOUNTING UNIT 04:1.502 -- 'LAKE ONTARIO : LAKE ONTARIO WITHIN THE

UNITED STATES, INCLUDING ITS BAYS AND

ISLANDS. NEW YORK .

CATALOGING UNIT 04150200 -- LAKE ONTARIO. NEW YORK .

ACCOUNTING UNIT 09:1.503 -- ST . LAWRENCE : THE DRAINAGE INTO THE

ST . LAWRENCE RIVER BASIN WITHIN THE

'UNITED STATES FROM THE MOUTH OF

LAKE ONTARIO TO AND INCLUDING 'THE ENGLISH

:RIVER BASIN . NEW YORK .

CATALOGING UNITS 04150301 -- UPPER ST . LAWRENCE . NEW 'YORK .

04150302 -- OSWEGATCHIE . NEW YORK .

04150303 -- INDIAN . NEW YORK.

04150304 °- GRASS . NEW YORK .

04150305 -- RAQUETTE . NEW YORK .

04150306 -- ST . REGIS. NEW YORK .

04150307 -- ENGLISH-SALMON . NEW YORK .

REGION 05 OHIO REGION -- THE DRAINAGE OF THE OHIO RIVER BASIN,

EXCLUDING THE TENNESSEE :RIVER BASIN. INCLUDES PARTS OF

ILLINOIS, INDIANA, KENTUCKY, MARYLAND, NEW YORK,

NORTH CAROLINA, OHIO, PENNSYLVANIA, TENNESSEE, VIRGINIA AND

WEST VIRGINIA .

SUBREGION 0501 -- ALLEGHENY : THE ALLEGHENY RIVER BASIN. PENNSYLVANIA, NEW

YORK .

ACCOUNTING UNIT 0.50100 --- ALLEGHENY. PENNSYLVANIA, NEW YORK .

A30
H Y D R 0 L 0 G :C C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

CATALOGING UNITS 05010001 -- UPPER ALLEGHENY. PENNSYLVANIA,

NEW YORK .

05010002 --- CONEWANGO. PENNSYLVANIA, NEW YORK .

05010003 -- MIDDLE ALLEGHENY-TIONESTA .

PENNSYLVANIA .

05010004 --- FRENCH . PENNSYLVANIA, NEW YORK .

05010005 --- CLARION. PENNSYLVANIA .

05010006 -- MIDDLE ALLEGHENY-REDBANK.

PENNSYLVANIA .

05010007 --- CONEMAUGH . PENNSYLVANIA .

05010008 --- KISKIMINETAS . PENNSYLVANIA .

05010009 °- LOWER ALLEGHENY. PENNSYLVANIA .

SUBREGION 0502 -- MONONGAHEL.A : THE MONONGAHELA RIVER BASIN . MARYLAND,

PENNSYLVANIA,, WEST VIRGINIA .

ACCOUNTING UNIT 050200 -- MONONGAHELA . MARYLAND, PENNSYLVANIA,

WEST VIRGINIA .

CATALOGING UNITS 05020001 --- TYGART VALLEY . WEST VIRGINIA .

05020002 -- WEST FORK . WEST VIRGINIA .

05020003 --- UPPER MONONGAHELA . PENNSYLVANIA,

WEST VIRGINIA .

05020004 --- CHEAT. PENNSYLVANIA, WEST VIRGINIA .

05020005 -- LOWER MONONGAHELA . PENNSYLVANIA,

WEST VIRGINIA .

05020006 -- YOUGHIOGHENY . MARYLAND,

PENNSYLVANIA, WEST VIRGINIA,.

SUBREGION 0503 -- UPPER OHIO : THE OHIO RIVER BASIN BELOW THE

CONFLUENCE OF THE ALLEGHENY AND MONONGAHELA RIVER

BASINS TO 'THE CONFLUENCE WITH THE KANAWHA RIVER

BASIN, EXCLUDING THE MUSKINGUM RIVER BASIN,. OHIO,

PENNSYLVANIA,, WEST VIRGINIA .

ACCOUNTING UNIT 050301 -- UPPER OHIO-BEAVER . THE OHIO RIVER BASIN

BELOW THE CONFLUENCE OF' THE ALLEGHENY

AND MONOIGAHELA RIVER BASINS TO LOCK.

AND DAM 160.

OHIO, PENNSYLVANIA, WEST VIRGINIA.

CATALOGING UNITS 05030101 -- UPPER OHIO . OHIO, PENNSYLVANIA,

WEST VIRGINIA .

05030102 -- SHENANGO . OHIO, PENNSYLVANIA .

05030103 -- MAHONING . OHIO, PENNSYLVANIA .

05030104 --- BEAVER. PENNSYLVANIA .

05030105 --- CONNOQUENESSING . PENNSYLVANIA .

05030106 --- UPPER OHIO-WHEELING. OHIO,

A31
H Y D R 0 1. 0 G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

ACCOUNTING UNIT 050302 --- UPPER OHIO-LITTLE KANAWHA: THE OHIO RIVER

BASIN FROM LOCK AND DAM 14 TO THE

CONFLUENCE WITH THE KANAWHA RIVER BASIN,

EXCLUDING THE MUSKINGUM RIVER BASIN. OHIO,

WEST VIRGINIA .

CATALOGING UNITE; 050-110201 -- LITTLE MUSKINGUM-MIDDLE ISLAND .

OHIO, WEST VIRGINIA .

050-110202 -- UPPER OHIO-SHADE .- OHIO,

WEST VIRGINIA.

05030203 -- LITTLE KANAWHA. WEST VIRGINIA .

050-110204 -- HOCKING . OHIO .

SUBREGI:ON 0504 -- MUSKINGUM: THE MUSKINGUM RIVER BASIN. OHIO .

ACCOUNTING UNIT 050400 --- MUSKINGUM . OHIO .

PENNSYLVANIA, WEST VIRGINIA .

CATALOGING UNITS 05040001 -- TUSCARAWAS . OHIO .

05040002 -- MOHICAN . OHIO .

05040003 -- WALHONDING . OHIO .

05040004 -- MUSKINGUM. OHIO .

05040005 -- WILLS. OHIO .

05040006 -- LICKING. OHIO .

SUBREGION 0505 -- KANAWHA: THE KANAWHA RIVER BASIN. NORTH CAROLINA,

VIRGINIA, WEST VIRGINIA .

ACCOUNTING UNIT 050500 --- KANAW'HA . NORTH CAROLINA, VIRGINIA,

WEST VIRGINIA .

CATALOGING UNITS 05050001 -- UPPER NEW. NORTH CAROLINA, VIRGINIA .

05050002 -- MIDDLE NEW. VIRGINIA, WEST VIRGINIA .

05050003 -- GREENBRIER . WEST VIRGINIA .

05050004 -- LOWER NEW. WEST VIRGINIA .

05050005 -- GAULEY . WEST 'VIRGINIA .

050`.10006 -- UPPER KANAWHA. WEST VIRGINIA .

050`.10007 -- ELK. WEST VIRGINIA.

050.`10008 -- LOWER KANAWHA. WEST VIRGINIA .

05050009 -- COAL . WEST VIRGINIA .

SUBREGION 0506 -- SCIOTO : THE SC'.IOTO RIVER BASIN . OHIO .

ACCOUNTING UNIT 050600 --- SCIOTO . OHIO .

CATALOGING UNITS 05060001 -- UPPER SCIOTO . OHIO .

05060002 =- LOWER SCIOTO . OHIO .

05060003 -- PAINT . OHIO .

A32
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

SUBREGION 0507 -- BIG SANDY --GUYANDOTTE : THE BIG SANDY AND GUYANDOTTE

RIVER BASINS . KENTUCKY, VIRGINIA, WEST VIRGINIA .

ACCOUNTING UNIT 0507 31 -- GUYANDOTTE : THE GUYANDOTTE RIVER BASIN .

WEST VIRGINIA .

CATALOGING UNITS 105070101 -- UPPER GUYANDOTTE . WEST VIRGINIA .

lD5070102 -- LOWER GUYANDOTTE . WEST VIRGINIA .

ACCOUNTING UNIT 050702 --- BIG SANDY: THE BIG SANDY RIVER BASIN .

KENTUCKY, VIRGINIA, WEST VIRGINIA .

CATALOGING UNITS D5070201 -- TUG. KENTUCKY, VIRGINIA,

WEST VIRGINIA .

05070202 -- UPPER LEVISA . KENTUCKY, VIRGINIA .

D5070203 -- LOWER LEVISA . KENTUCKY .

D5070204 -- BIG SANDY. KENTUCKY, WEST VIRGINIA .

S'UBREGION 0508 -- GREAT MIAMI : THE GREAT MIAMI RIVER BASIN . INDIANA,

OHIO .

ACCOUNTING UNIT 050800 -- GREAT MIAMI . INDIANA, OHIO .

CATALOGING UNITS 05080001 -- UPPER GREAT MIAMI . INDIANA OHIO .

05080002 -- LOWER GREAT MIAMI . INDIANA OHIO .

050800 03 -- WHITEWATER . INDIANA, OHIO .

SUBREGION 0509 -- MIDDLE OHIO : THE OHIO RIVER_BASIN BELOW THE

CONFLUENCE WITH THE KANAWHA RIVER BASIN TO THE

CONFLUENCE WITH THE KENTUCKY RIVER BASIN, EXCLUDING

THE BIG SANDY, GREAT MIAMI, GUYANDOTTE, KENTUCKY,

LICKING AND SCIOTO RIVER BASINS . INDIANA, KENTUCKY,

OHIO, WEST VIRGINIA .

ACCOUNTING UNIT ,050901 -- MIDDLE OHIO-RACCOON : THE OHIO RIVER BASIN

BELOW THE CONFLUENCE WITH THE

KANAWHA RIVER BASIN TO RIVER MILE 359 .3

(FORMERLY LOCK AND DAM 31) ON THE OHIO

:RIVER, EXCLUDING THE BIG SANDY,

~GUYANDOTTE, AND SCIOTO RIVER BASINS .

:KENTUCKY, OHIO, WEST VIRGINIA .

CATALOGING UNITS 05090101 -- RACCOON-SYMMES . OHIO, WEST VIRGINIA .

05090102 -- TWELVEPOLE . WEST VIRGINIA .

05090103 -- LITTLE SCIOTO-TYGARTS . KEN'T'UCKY,

OHIO .

05090104 -- LITTLE SANDY . KENTUCKY .
H Y D R 0 L 0 G I C: U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

ACCOUNTING UNIT 050902 --- MIDDLE. OHIO-LITTLE MIAMI : THE OHIO RIVER

BASIN FROM RIVER MILE 359 .3 (FORMERLY LOCK

AND DAM 31) ON THE OHIO RIVER TO .THE

CONFLUENCE WITH THE KENTUCKY RIVER BASIN,

EXCLUDING THE GREAT MIAMI, KENTUCKY AND

LICKING RIVER BASINS . INDIANA, KENTUCKY',,

OHIO .

CATALOGING UNITS 05090201 -- OHIO BRUSH-WHITEOAK . KENTUCKY, OHIO .

05090202 -- LITTLE MIAMI . OHIO .

05090203 -- MIDDLE OHIO-LAUGHERY. INDIANA,

KENTUCKY, OHIO .

SUBREGION 0510 -- KENTUCKY-LICKING : THE LICKING AND KENTUCKY RIVER

BASINS . KENTUCKY .

ACCOUNTING UNIT 051001 - LICKING: THE LICKING RIVER BASIN .

KENTUCKY .

CATALOGING UNITS 05100101 -- LICKING. KENTUCKY .

05100102 -- SOUTH FORK LICKING. KENTUCKY .

ACCOUNTING UNIT 05,11002 --- KENTUCKY : THE KENTUCKY RIVER BASIN.

KENTUCKY .

CATALOGING UNITS 05100201 -- NORTH FORK KENTUCKY . KENTUCKY .

05100202 -- MIDDLE FORK KENTUCKY . KENTUCKY .

05100203 -- SOUTH FORK KENTUCKY . KENTUCKY .

05100204 -- UPPER KENTUCKY . KENTUCKY .

05100205 -- LOWER KENTUCKY . KENTUCKY .

SUBREGION 0511 -- GREEN: THE GREEN RIVER BASIN. KENTUCKY, TENNESSEE.

ACCOUNTING UNIT 05 .1100 --- GREEN. KENTUCKY, TENNESSEE.

CATALOGING UNITS 05110001 -- UPPER GREEN. KENTUCKY .

05110002 -- BARREN . KENTUCKY, TENNESSEE .

05110003 -- MIDDLE GREEN. KENTUCKY .

05110004 -- ROUGH. KENTUCKY .

05110005 -- LOWER GREEN. KENTUCKY .

05110006 -- POND . KENTUCKY .

SUBREGION 0512 -- WABASH : THE WABASH RIVER BASIN . ILLINOIS,

INDIANA, OHIO .

ACCOUNTING UNIT 051'201 --- WABASH : THE WABASH RIVER BASIN, EXCLUDING

THE PATOKA AND WHITE RIVER BASINS .

ILLINOIS, INDIANA, OHIO .

A34
H Y D R O L O G I C U N IT C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AlTD CATALOGING UNITS (CONTINUED)

CATALOGING UNITS 05120101 -- UPPER WABASH . INDIANA, OHIO .

05120102 -- S1?ILAMONIE . INDIANA.

05120103 -- MISSISSINEWA . INDIANA, OHIO .

05120104 -- EEL. INDIANA.

05120105 -- MIDDLE WABASH-DEER . INDIANA.

05120106 -- TIPPECANOE . INDIANA.

0512010'7 -- WILDCAT . INDIANA.

05120106 -- MIDDLE WABASH-LITTLE VERMILION.

ILLINOIS, INDIANA.

05120109 -- VERMILION . ILLINOIS, INDIANA.

05120110 -- SUGAR. INDIANA .

05120111. -- MIDDLE WABASH-BUSSERON. ILLINOIS,

INDIANA .

05120112 -- EMBARRAS . ILLINOIS .

05120113 -- LOWER WABASH . ILLINOIS, INDIANA.

05120114 -- LITTLE WABASH . ILLINOIS .

05120115 -- SKILLET . ILLINOIS .

CATALOGING UNITS 05120201. -- UPPER WHITE. INDIANA.

05120202 -- LOWER WHITE . INDIANA.

05120203 -- EEL . INDIANA.

05120204 -- DRIFTWOOD. INDIANA.

05120205 -- FLATROCK-'.HAW . INDIANA.

05120206 -- UPPER EAST FORK WHITE . INDIANA.

0512020'7 -- MUSCATATUCK . INDIANA.

05120206 -- LOWER EAST FORK WHITE . INDIANA.

05120209 -- PATOKA . INDIANA.

ACCOUNTING UNIT 051301 -- UPPER CUMBERLAND : THE CUMBERLAND RIVER

BASIN ABOVE THE CONFLUENCE WITH AND

INCLUDING 'THE CANEY FORK

BASIN. KENTUCKY, TENNESSEE .

CATALOGING UNITS 05130101. -- UPPER CUMBERLAND . KENTUCKY,

TENNESSEE.

05130102 -- ROCKCASTLE . KENTUCKY .

05130103 -- UPPER CUMBERLAND-LAKE CUMBERLAND .

KENTUCKY, TENNESSEE.

05130104 -- SOUTH FORK CUMBERLAND . KENTUCKY,

TENNESSEE.

05130105 -- OBEY . KENTUCKY, TENNESSEE.

05130106 -- UPPER CUMBERLAND-CORDELL HULL

RESERVOIR. TENNESSEE.

A35

ACCOUNTING UNIT 051202 -- PATOK'A-WHITE . THE PATOKA AND WHITE RIVER

BASINS . INDIANA .

SUBREGION 0513 -- CUMBERLAND : THE CUMBERLAND RIVER BASIN KENTUCKY,

TENNESSEE.
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

05130].07 -- COLLINS. TENNESSEE.

05130108 -- CANEY. TENNESSEE.

ACCOUNTING UNIT 051302 -- LOWER CUMBERLAND : THE CUMBERLAND RIVER

BASIN BELOW THE CONFLUENCE WITH THE

CANEY FORK BASIN. KENTUCKY, TENNESSEE .

CATALOGING UNITS 05130201 -- LOWER CUMBERLAND-OLD HICKORY LAKE .

TENNESSEE .

05130202 -- LOWER CUMBERLAND-SYCAMORE .

TENNES;SEE .

05130203 --- STONES; . TENNESSEE.

05130204 --- HARPE7PH . TENNESSEE.

05130205 --LOWER CUMBERLAND . KENTUCKY,

TENNESSEE.

05130206 --- RED . KENTUCKY, TENNESSEE: .

SUBREG]':ON 0514 -- LOWER OHIO : THE OHIO RIVER BASIN BELOW THE

CONFLUENCE WITH THE KENTUCKY RIVER BASIN, TO THE

CONFLUENCE WITH THE MISSISSIPPI RIVER, EXCLUDING

THE CUMBERLAND, GREEN, TENNESSEE, AND WABASH RIVER

BASINS . ILLINOIS, INDIANA, KENTUCKY .

ACCOUNTING UNIT 051401 --- LOWER OHIO-SALT . THE OHIO RIVER BASIN

BELOW THE CONFLUENCE WITH THE

KENTUCKY RIVER BASIN, TO RIVER MILE 703.0

(FORMERLY LOCK AND DAM 45) ON THE

OHIO RIVER. INDIANA, KENTUCKY .,

CATALOGING UNITS 05140101 -- SILVER-LITTLE KENTUCKY . INDIANA,

KENTUCKY .

05140102 --- SALT . KENTUCKY .

05140103 --- ROLLING FORK . KENTUCKY .

05140104 --- BLUE-SINKING . KENTUCKY, INDIANA .

ACCOUNTING UNIT 051402 --- LOWER OHIO : THE OHIO RIVER BASIN FROM

RIVER MILE '703 .0 (FORMERLY LOCK AND

DAM 45) ON THE OHIO RIVER TO THE

CONFLUENCE WITH THE MISSISSIPPI RIVER.,

EXCLUDING THE CUMBERLAND, GREEN,

TENNESSEE, AND WABASH :RIVER BASINS .

ILLINOIS, INDIANA, KENTUCKY .

CA'.L"ALOGING UNITS 05140201 --- LOWER OHIO-LITTLE PIGEON . INDIANA,

05140202 --- HIGHLAND-PIGEON . INDIANA, KENTUCKY

05140203 -'- LOWER OHIO-BAY . ILLINOIS;, KENTUCKY,,

05140204 --- SALINE . ILLINOIS .

05140205 --- TRADEWATER . KENTUCKY

05140206 --- LOWER OHIO . ILLINOIS, KENTUCKY .

A,36
H Y D R 0 L 0 G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREG:IONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

REGION 06 TENNESSEE REGION -- THE DRAINAGE OF THE TENNESSEE RIVER

BASIN. INCLUDES PARTS OF ALABAMA, GEORGIA, KENTUCKY,

MISSISSIPPI, NORTH CAROLINA, TENNESSEE, AND VIRGINIA .

SUBREGION 0601 -- UPPER TENNESSEE : THE TENNESSEE RIVER BASIN ABOVE

WATTS BAR DAM. GEORGIA, NORTH CAROLINA, TENNESSEE,

VIRGINIA .

ACCOUNTING UNIT 060101 -- FRENCH; BROAD--HOLSTON : THE TENNESSEE RIVER

BASIN ABOVE THE CONFLUENCE OF AND INCLUDING

THE FRENCH BROAD AND HOLSTON RIVER BASINS .

NORTH CAROLINA, TENNESSEE, VIRGINIA .

CATALOGING UNITS 06010101 -- NORTH FORK HOLSTON. TENNESSEE,

VIRGINIA .

06010102 -- SOUTH FORK HOLSTON. TENNESSEE,

VIRGINIA .

06010103 -- WATAUGA. NORTH CAROLINA, TENNESSEE.

06010104 -- HOLSTON. TENNESSEE.

06010105 -- UPPER FRENCH BROAD . NORTH CAROLINA,,

TENNESSEE .

06010106 -- PIGEON NORTH CAROLINA, TENNESSEE .

06010107 -- LOWER FRENCH BROAD . TENNESSEE.

06010108 -- NOLICHUCKY . NORTH CAROLINA,

TENNESSEE.

ACCOUNTING UNIT 060102 -- UPPER TENNESSEE: THE TENNESSEE RIVER

BASIN ABOVE WATTS BAR DAM, EXCLUDING THE

FRENCH BROAD AND HOLSTON RIVER BASINS .

GEORGIA, NORTH CAROLINA, TENNESSEE,

VIRGINIA.

CATALOGING UNITS 06010201 -- WATTS BAR LAKE . TENNESSEE.

06010202 -- UPPER ]LITTLE TENNESSEE . GEORGIA,

NORTH CAROLINA .

06010203 -- TUCKASEGEE . NORTH CAROLINA .

06010204 -- LOWER ;LITTLE TENNESSEE.

NORTH CAROLINA, TENNESSEE .

06010205 -- UPPER CLINCH . TENNESSEE, VIRGINIA.

06010206 -- POWELL . TENNESSEE, VIRGINIA .

060102!37 -- LOWER CLINCH . TENNESSEE .

06010208 -- EMORY . TENNESSEE .

SUBREGION 0602 -- MIDDLE TENNESSEE-HIWASSEE : THE TENNESSEE RIVER

:BASIN BELOW WATTS BAR DAM TO AND INCLUDING THE

SEQUATCHIE RIVER BASIN. ALABAMA, GEORGIA,

A:3 7
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

NORTH CAROLINA, TENNESSEE .

ACCOUNTING UNIT 060200 -- MIDDLE TENNESSEE-HIWASSEE . ALABAMA,

GEORGIA, NORTH CAROLINA, TENNESSEE .

CATALOGING UNITS 06020001 -- MIDDLE TENNESSEE-CHICKAMAUGA.

ALABAMA, GEORGIA, TENNESSEE.

06020002 -- HIWASSEE . GEORGIA, NORTH CAROLINA

TENNESSEE .

06020003 --OCOEE . GEORGIA, NORTH CAROLINA,

TENNESSEE .

06020004 -- SEQUATCHIE . TENNESSEE.

SUBREGION 0603 -- MIDDLE TENNESSEE-ELK : THE TENNESSEE RIVER BASIN

BELOW THE CONFLUENCE WITH THE SEQUATCHIE RIVER

BASIN TO PICKWICK DAM. ALABAMA, GEORGIA,

MISSISSIPPI, TENNESSEE.

ACCOUNTING UNIT 060300 -- MIDDLE TENNESSEE-ELK . ALABAMA, GEORGIA,

MISSISSIPPI, TENNESSEE .

CATALOGING UNITS 06030001 -- GUNTERSVILLE LAKE . ALABAMA, GEORGIA,

TENNESSEE .

06030002 -- WHEELER LAKE . ALABAMA, TENNESSEE.

06030003 -- UPPER ELK . ALABAMA,, TENNESSEE .

06030004 -- LOWER ELK. ALABAMA, TENNESSEE .

06030005 -- PICKWICK LAKE . ALABAMA, MISSISSIPPI,

TENNESSEE.

06030006 -- BEAR . ALABAMA, MISSISSIPPI .

SUBREGIO'N 0604 -- LOWER TENNESSEE: THE TENNESSEE RIVER BASIN BELOW

PICKWICK DAM. KENTUCKY, MISSISSIPPI, TENNESSEE.

ACCOUNTING UNIT 060400 -- LOWER TENNESSEE: KENTUCKY, MISSISSIPPI,

TENNESSEE.

CATALOGING UNITS 06040001 -- :LOWER TENNESSEE-BEECH . MISSISSIPPI

TENNESSEE .

06040002 -- UPPER DUCK . TENNESSEE .

06040003 -- :LOWER DUCK . TENNESSEE.

06040004 -- '.BUFFALO . TENNESSEE.

06040005 -- ]KENTUCKY LAKE . KENTUCKY, TENNESSEE: .

06040006 -- :LOWER TENNESSEE . KENTUCKY

TENNESSEE .

A38

REGION 07 UPPER MISSISSIPPI REGION --- THE :DRAINAGE OF THE MISSISSIPPI:

RIVER BASIN ABOVE THE CONFLUENCE WITH THE OHIO RIVER,
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

EXCLUDING THE MISSOURI RIVER BASIN. INCLUDES PARTS OF'

ILLINOIS, INDIANA, IOWA, MICHIGAN, MINNESOTA,

MISSOURI, SOUTH DAKOTA, AND WISCONSIN .

SUBREGION 0701 -- MISSISSIPPI HEADWATERS : THE MISSISSIPPI RIVER BASIN'

ABOVE THE CONFLUENCE WITH THE ST . CROIX RIVER

BASIN, EXCLUDING THE MINNESOTA RIVER BASIN.

MINNESOTA.

ACCOUNTING UNIT 070101 -- MISSISSIPPI HEADWATERS : THE MISSISSIPPI

RIVER BASIN ABOVE BLANCHARD DAM.

MINNESOTA.

CATAL013ING UNITS 07010101 -- MISSISSIPPI HEADWATERS . MINNESOTA.

07010102 -- LEECH LAKE . MINNESOTA.

07010103 -- PRAIRIE-WILLOW . MINNESOTA.

07010104 °- ELK-NOKAS'IPPI . MINNESOTA.

07010105 -- PINE . MINNESOTA.

07010106 -- CROW WING . MINNESOTA.

07010107 -- REDEYE . MINNESOTA.

07010108 °- LONG PRAIRIE . MINNESOTA.

ACCOUNTING UNIT 070102 -- UPPER MISSISSIPPI-CROW-RUM : THE

MISSISSIPPI RIVER BASIN BELOW BLANCHARD

DAM AND ABOVE THE CONFLUENCE WITH THE

ST . CROIX RIVER BASIN, EXCLUDING THE

MINNESOTA RIVER BASIN. MINNESOTA .

CATALOGING UNITS 07010201 -- PLATTE-SPUNK . MINNESOTA.

07010202 -- SAUK . MINNESOTA .

07010203 -- CLEARWATER-ELK. MINNESOTA.

07010204 -- CROW . MINNESOTA.

07010205 °- SOUTH FORK CROW . MINNESOTA.

07010206 -- TWIN CITIES . MINNESOTA .

07010207 -- RUM. MINNESOTA.

SUBREGION 0702 --MINNESOTA : THE MINNESOTA RIVER BASIN . IOWA,,

MINNESOTA, SOUTH DAKOTA .

ACCOUNTING UNIT 070200 -- MINNESOTA. IOWA, MINNESOTA, SOUTH DAKOTA .

CATALOGING UNITS 07020001 -- UPPER MINNESOTA. MINNESOTA,

SOUTH DAKOTA .

07020002 -- POMME DE TERRE . MINNESOTA.

07020003 °- LAC QUI PARLE . SOUTH DAKOTA,

MINNESOTA .

07020004 -- HAWK-YELLOW MEDICINE . MINNESOTA.

07020005 -- CHIPPEWA . MINNESOTA.

07020006 -- REDWOOD. MINNESOTA.

A3 9
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS .AND CATALOGING UNITS (CONTINUED)

07020007 -- MIDDLE MINNESOTA. MINNESOTA,

07020008 -- COTTONWOOD . MINNESOTA.

07020009 -- BLUE EARTH. IOWA, MINNESOTA.

07020010 -- WATONWAN . MINNESOTA.

07020011 -- LE SUEUR. MINNESOTA.

07020012 -- LOWER MINNESOTA. MINNESOTA.

SUBREGIOI>T 0703 -- ST . CROIX: THE ST . CROIX RIVER BASIN. MINNESOTA,

WISCONSIN.

ACCOUNTING UNIT 070300 -- ST . CROIX. MINNESOTA,, WISCONSIN .

CATALOGING UNITS 07030001 -- UPPER ST . CROIX. MINNESOTA,

WISCONSIN .

07030002 -- NAMEKAGON . WISCONSIN .

07030003 -- KETTLE . MINNESOTA.

07030004 -- SNAKE . MINNESOTA.

07030005 -- LOWER ST . CROIX. MINNESOTA,

WISCONSIN .

SUB'REGIO'1 0704 -- UPPER MISSISSIPPI-BLACK-ROOT : THE MISSISSIPPI RIVER

BASIN BELOW THE CONFLUENCE WITH THE ST . CROIX RIVER

BASIN TO AND INCLUDING THE ROOT RIVER BASIN WEST OF

THE MISSISSIPPI RIVER AND THE LA CROSSE RIVER BASIN

EAST OF THE MISSISSIPPI RIVER, EXCLUDING THE

CHIPPEWA RIVER BASIN . IOWA, MINNESOTA, WISCONSIN

ACCOUNTING UNIT 070400 -- UPPER MISSISSIPPI-BLACK-ROOT . IOWA,

MINNESOTA, WISCONSIN .

CATALOGING UNITS 0704000:1 -- RUSH-VERMILLION . MINNESOTA,

WISCONSIN.

07040002 -- CANNON . MINNESOTA .

07040003 -- BUFFALO-WEITEWATER . MINNESOTA,

WISCONSIN.

07040004 -- XUMBRO . MINNESOTA.

07040005 -- TREMPEALEAU . WISCONSIN.

07040006 -- ILA CROSSE-PINE . MINNESOTA

WISCONSIN.

07040007 -- BLACK . WISCONSIN .

07040008 -- ROOT . IOWA, MINNESOTA.

SUBREGION 0705 -- CHIPPEWA : THE CHIPPEWA RIVER BASIN . MICHIGAN,

WISCONSIN.

ACCOUNTING UNIT 070500 -- CHIPPEWA . MICHIGAN, WISCONSIN.

CATALOGING UNITS 07050001 -- UPPER CHIPPEWA . WISCONSIN

07050002 -- FLAMBEAU . MICHIGAN, WISCONSIN .

A40
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

07050003 °- SOUTH FORK FLAMBEAU . WISCONSIN.

07050004 -- JUMP . WISCONSIN.

07050005 --- LOWER CHIPPEWA . WISCONSIN .

07050006 --- EAU CLAIRE . WISCONSIN.

07050007 --- RED CEDAR. - WISCONSIN.

SUBREGION 0706 -- UPPER MISSISSIPPI-MAQUOKETA-PLUM : THE MISSISSIPPI

RIVER BASIN BELOW THE ROOT RIVER BASIN WEST OF THE

MISSISSIPPI RIVER AND THE LA CROSSE RIVER BASIN

EAST OF THE MISSISSIPPI RIVER TO LOCK AND DAM 13,

EXCLUDING THE WISCONSIN RIVER BASIN. ILLINOIS,

IOWA, MINNESOTA, WISCONSIN.

ACCOUNTING UNIT 070600 -- UPPER MISSISSIPPI-MAQUOKETA-PLUM .

ILLINOIS, IOWA, MINNESOTA, WISCONSIN .

CATALOGING UNITS 07060001 --- COON-YELLOW . IOWA, MINNESOTA,

WISCONSIN.

07060002 --- UPPER IOWA . IOWA, MINNESOTA.

07060003 -- GRANT-LITTLE MAQUOKETA. IOWA,

WISCONSIN.

07060004 --- TURKEY . IOWA .

07060005 -- APPLE-PLUM . ILLINOIS, IOWA,

WISCONSIN .

07060006 -- MAQUOKETA. IOWA .

SUBREGION 0707 -- WISCONSIN: THE WISCONSIN RIVER BASIN. MICHIGAN,

WISCONSIN.

ACCOUNTING UNIT 070700 -- WISCONSIN. MICHIGAN, WISCONSIN .

CATALOGING UNITS 07070001 -- UPPER WISCONSIN . MICHIGAN,

WISCONSIN.

07070002 -- LAKE DUBAY. WISCONSIN .

07070003 -- CASTLE ROCK . WISCONSIN.

07070004 -- BARABOO. WISCONSIN.

07070005 -- LOWER WISCONSIN . WISCONSIN .

0'1070006 -- KICKAPOO . WISCONSIN .

SUBREGION 0708 -- UPPER MISSISSIPPI.-IOWA-SKUNK-WAPSIPINICON : THE

MISSISSIPPI RIVER BASIN BELOW LOCK AND DAM 13 TO

THE CONFLUENCE WITH THE DES MOINES RIVER BASIN,

EXCLUDING THE ROCK RIVER BASIN. ILLINOIS, IOWA,

MINNESOTA.

ACCOUNTING UNIT 070801 -- UPPER MISSISSIPPI-SKUNK-WAPSIPINICON :

THE MISSISSIPPI RIVER BASIN BELOW LOCK AND

DAM 13 TO THE CONFLUENCE WITH THE

DES MOINES RIVER BASIN,, EXCLUDING THE

A4 1
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

IOWA AND ROCK RIVER BASINS . ILLINOIS,

IOWA, MINNESOTA.

CATALOGING UNITS

ACCOUNTING UNIT 070802 -- IOWA: THE IOWA RIVER BASIN. IOWA,

MINNESOTA.

CATALOGING UNITS 07080201 -- UPPER CEDAR. IOWA, MINNESOTA.

07080202 -- SHELL ROCK . IOWA, MINNESOTA.

07080203 -- WINNEBAGO. IOWA, MINNESOTA.

07080204 -- WEST FORK CEDAR . IOWA .

07080205 -- MIDDLE CEDAR. IOWA .

07080206 -- LOWER CEDAR. IOWA .

07080207 -- UPPER IOWA . IOWA.

07080208 -- MIDDLE IOWA . IOWA .

07080209 -- LOWER IOWA . IOWA .

SUBREGION 0709 -- ROCK : THE ROCK RIVER BASIN. ILLINOIS, WISCONSIN.

ACCOUNTING UNIT 070900 -- ROCK . ILLINOIS, WISCONSIN.

CATALOGING UNITS 07090001 -- UPPER ROCK . ILLINOIS, WISCONSIN.

07090002 -- CRAWFISH . WISCONSIN.

07090003 -- PECATONICA . ILLINOIS, WISCONSIN.

07090004 -- SUGAR . ILLINOIS, WISCONSIN.

07090005 -- LOWER ROCK . ILLINOIS, WISCONSIN.

07090006 -- KISHWAUKEE . ILLINOIS, WISCONSIN.

07090007 -- GREEN . ILLINOIS .

SUBREGION 0710 -- DES MOINES : THE DES MOINES RIVER BASIN. IOWA,

MINNESOTA, MISSOURI .

ACCOUNTING UNIT 071000 -- DES MOINES . IOWA, MINNESOTA, MISSOURI .

CATALOGING UNITS 07100001 -- DES MOINES HEADWATERS . MINNESOTA.

07100002 -- UPPER DES MOINES . IOWA, MINNESOTA.

0710000!3 -- EAST FORK DES MOINES . IOWA,

MINNESOTA.

07100004 -- MIDDLE DES MOINES . IOWA .

07100005 -- BOONE . IOWA .

07100006 -- NORTH RACCOON. IOWA .

07100007 -- SOUTH RACCOON. IOWA .

A42

07080101

07080102

07080103

07080104

--

--

--

--

COPPERAS-DUCK. ILLINOIS, IOWA .

UPPER WAPSIPINICON . IOWA, MINNESO'T'A .

LOWER WAPSIPINICON . IOWA .

FLINT-HENDERSON . ILLINOIS, IOWA .

07080105 -- SOUTH SKUNK. IOWA .

07080106 -- NORTH SKUNK. IOWA .

07080107 -- SKUNK. IOWA .
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIOIS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

0'710000$ -- LAKE RED ROCK . IOWA .

0'7100009 -- LOWER DES MOINES . IOWA, MISSOURI .

SUBREGION 071.1 -- UPPER MISSISSIPPI-SALT : THE MISSISSIPPI RI 1 7ER BASIN

BELOW THE CONFLUENCE WITH THE DES MOINES RIVER

BASIN TO THE CONFLUENCE WITH THE MISSOURI RIVER

BASIN, EXCLUDING THE ILLINOIS RIVER BASIN .

ILLINOIS, IOWA, MISSOURI .

ACCOUNTING UNIT 071100 --- UPPER MISSISSIPPI-SALT . ILLINOIS, IOWA,

MISSOURI .

CATALOGING UNITS 0711.0001 -- BEAR-WYACONDA. ILLINOIS, IOWA,

MISSOURI .

07110002 -- NORTH FABIUS . IOWA, MISSOURI .

0711.0003 -- SOUTH FABIUS . MISSOURI .

0711.0004 -- THE SNY . ILLINOIS, MISSOURI .

07110005 -- NORTH FORK SALT . MISSOURI .

0711.0006 -- SOUTH FORK SALT . MISSOURI .

07110007 -- SALT . MISSOURI .

0711.0008 -- CUIVRE . MISSOURI .

0711.0009 -- PERUQUE-PIASA . ILLINOIS, MISSOURI .

SUBREGION 0712 -- UPPER ILLINOIS : THE ILLINOIS RIVER BASIN ABOVE THE

CONFLUENCE OF AND INCLUDING THE FOX RIVER BASIN.

ILLINOIS, INDIANA, MICHIGAN, WISCONSIN .

ACCOUNTING UNIT 071200 --- UPPER ILLINOIS . ILLINOIS, INDIANA,

MICHIGAN, WISCONSIN .

CATALOGING UNITS 07120001 -- KANKAKEE . ILLINOIS, INDIANA,

MICHIGAN .

07120002 -- IROQUOIS . ILLINOIS, INDIANA.

07120003 -- CHICAGO . ILLINOIS, INDIANA.

07120004 -- DES PLAINES . ILLINOIS, WISCONSIN .

07120005 -- UPPER ILLINOIS . ILLINOIS .

07120006 -- UPPER FOX. ILLINOIS, WISCONSIN .

07110007 -- LOWER FOX. ILLINOIS .

SUBREGION 0713 -- LOWER ILLINOIS : THE ILLINOIS RIVER BASIN BELOW THE

CONFLUENCE OF THE FOX RIVER BASIN. ILLINOIS .

ACCOUNTING UNIT 071300 -- LOWER ILLINOIS . ILLINOIS .

CATALOGING UNITS 07130001 -° LOWER ILLINOIS-SENACHWINE LAKE .

ILLINOIS .

07130002 -° VERMILION. ILLINOIS .

071:30003 -- LOWER ILLINOIS-LAKE CHAUTAUQUA .

ILLINOIS .

A43
REGION 08

CATALOGING UNITS

H Y D R O L O G I C

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

07130004 --

07130005 --

07130006 --

07130007 --

07130008 --

07130009 --

07130010 --

07130011 --

0713001.2 --

SUBREGION 0714 -- UPPER MISSISSIPPI-KASKASKIA-MERAMEC : THE

MISSISSIPPI[ RIVER BASIN BELOW THE CONFLUENCE WITH

AND EXCLUDING THE MISSOURI RIVER BASIN TO THE

CONFLUENCE WITH THE OHIO RIVER. ILLINOIS, MISSOURI .

ACCOUNTING UNIT 071401 -- UPPER MISSISSIPPI-MERAMEC : THE

MISSISSIPPI RIVER BASIN BELOW THE

CONFLUENCE WITH AND EXCLUDING THE MISSOURI

RIVER 13ASIN TO THE CONFLUENCE WITH THE

OHIO RIVER, EXCLUDING THE KASKASKIA RIVER

BASIN. ILLINOIS, MISSOURI .

07140101 --

07140102 --

07~04010:3 --

07140104 --

07140:105 --

07140106 --

07140107 --

07140108 --

U N :1 T C O D E S

MACKINAW . ILLINOIS .

SPOON. ILLINOIS .

UPPER SANGAMON . ILLINOIS .

"SOUTH FORK SANGAMON . ILLINOIS .

LOWER SANGAMON . ILLINOIS .

SALT . ILLINOIS .

LA MOINE . ILLINOIS .

LOWER ILLINOIS . ILLINOIS .

MACOUPIN . ILLINOIS .

CAHOKIA-JOACHIM. ILLINOIS,, MISSOURI .

MERAMEC . MISSOURI .

BOURBEUSE . MISSOURI .

BIG. MISSOURI .

UPPER MISSISSIPPI-CAPE GIRARDEAU.

:ILLINOIS . MISSOURI .

BIG MUDDY . ILLINOIS .

WHITEWATER . MISSOURI .

CACHE . ILLINOIS .

ACCOUNTING UNIT 071402 -- KASKASKIA: THE KASKASKIA RIVER BASIN.

ILLINOIS .

CATALOGING UNITS 07140201 -- UPPER KASKASKIA. ILLINOIS .

07140202 -- MIDDLE KASKASKIA. ILLINOIS .

07140203 -- SHOAL . ILLINOIS .

07140204 -- :LOWER KASKASKIA. ILLINOIS .

LOWER MISSISSIPPI REGION -- THE DRAINAGE OF : (A) THE

MISSISSIPPI RIVER BELOW ITS CONFLUENCE WITH THE OHIO RIVER,,

EXCLUDING THE ARKANSAS, RED, AND WHITE RIVER BASINS

ABOVE THE POINTS OF HIGHEST BACKWATER EFFECT OF THE

MISSISSIPPI RIVER IN THOSE BASINS ; AND (B) COASTAL STREAMS

THAT ULTIMATELY DISCHARGE INTO THE GULF OF MEXICO FROM THE

PEARL RIVER BASIN BOUNDARY TO THE SABINE RIVER AND SABINE

A44
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

LAKE DRAINAGE BOUNDARY . INCLUDES PARTS OF ARKANSAS, ]KENTUCKY

LOUISIANA, MISSISSIPPI, MISSOURI, AND TENNESSEE.

SUBREGION 0801 -- LOWER MISSISSIPPI-HATCHIE : THE MISSISSIPPI RIVER

BASIN FROM THE CONFLUENCE OF THE OHIO RIVER

TO AND INCLUDING THE HORN LAKE CREEK

BASIN, BUT EXCLUDING THE DRAINAGE WEST OF THE

WEST-BANK LEVEE ALONG THE MISSISSIPPI RIVER.

ARKANSAS, KENTUCKY, MISSISSIPPI, MISSOURI, AND

TENNESSEE.

ACCOUNTING UNIT 080101 --- LOWER MISSISSIPPI-MEMPHIS: THE

MISSISSIPPI ALLUVIAL LANDS LYING IN THE

FLOOD PLAIN OF THE PRESENT CHANNEL OF THE

MISSISSIPPI RIVER BETWEEN THE WEST-BANK

LEVEE AND THE DRAINAGE BOUNDARIES OF THE

MAJOR TRIBUTARIES ALONG THE EAST BANK,

FROM THE CONFLUENCE OF THE OHIO RIVER TO

HORN LAKE CREEK. ARKANSAS, KENTUCKY,

MISSISSIPPI, MISSOURI, AND TENNESSEE.

CATALOGING UNIT 08010100 -- LOWER MISSISSIPPI-MEMPHIS . ARKANSAS,

KENTUCKY MISSISSIPPI, MISSOURI,

AND TENNESSEE .

ACCOUNTING UNIT 080102 -- HATCHIE-OBION: THE DRAINAGE BASINS EAST OF

THE MISSISSIPPI RIVER FROM THE OHIO RIVER.

BASIN TO AND INCLUDING THE HORN LAKE CREEK,

BASIN, BUT EXCLUDING THE ALLUVIAL

LANDS LYING IN THE FLOOD PLAIN OF' THE

PRESENT CHANNEL OF THE MISSISSIPPI RIVER

EAST OF THE WEST-BANK LEVEE.

KENTUCKY, MISSISSIPPI, AND TENNESSEE .

CATALOGING UNITS 08010201 -- BAYOU DE CHIEN-MAYFIELD . KENTUCKY

TENNESSEE .

08010202 -- OBION. . KENTUCKY, TENNESSEE,.

08010203 -- SOUTH FORK OBION . TENNESSEE .

08010204 -- NORTH FORK FORKED DEER . TENNESSEE .

08010205 -- SOUTH FORK FORKED DEER . TENNESSEE .

08010206 -- FORKED DEER . TENNESSEE .

08010207 -- UPPER HATCHIE. MISSISSIPPI

TENNESSEE .

08010208 -- LOWER HATCHIE . MISSISSIPPI,

TENNESSEE .

08010209 -- LOOSAHATCHIE . TENNESSEE.

08010210 -- WOLF . MISSISSIPPI, TENNESSEE.

08010211 -- HORN LAKE-NONCONNAH . MISSISSIPPI,

A4 5
H Y D R O L O G I C U N I T C O D E S

BOU19DARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

TENNESSEE .

SUBREGION 01302 -- LOWER MISSISSIPPI - ST . FRANCIS : THE MISSISSIPPI:

RIVER BASIN FROM THE HORN LAKE CREEK BASIN

ON THE EAST BANK TO AND INCLUDING THE ARKANSAS AND

WHITE RIVER BASINS BELOW THE POINTS OF HIGHEST

BACKWATER EFFECT OF THE MISSISSIPPI RIVER;

EXCLUDING ALL DRAINAGE EAST OF THE EAST-BANK LEVEE

BELOW THE HORN LAKE CREEK BASIN .

ARKANSAS, MISSISSIPPI, AND MISSOURI .

ACCOUNTING UNIT 080201 -- :LOWER MISSISSIPPI-HELENA : THE MISSISSIPPI

ALLUVIAL LANDS LYING IN THE FLOOD PLAIN OF

THE PRESENT CHANNEL OF THE MISSISSIPPI

RIVER BETWEEN THE EAST-BANK LEVEE AND THE

LEVEES OR THE DRAINAGE BOUNDARIES OF THE

MAJOR TRIBUTARIES ALONG THE WEST BANK,

FROM HORN LAKE CREEK TO THE ARKANSAS RIVER

ARKANSAS, MISSISSIPPI .

CATALOGING UNIT 08020.100 -- LOWER MISSISSIPPI-HELENA . ARKANSAS,

MISSISSIPPI .

ACCOUNTING UNIT 080202 -- ST . FRANCIS : THE ST . FRANCIS RIVER BASIN

AND ALL MAN-MADE DIVERSIONS INTO THE

BASIN. ARKANSAS, MISSOURI .

CATALOGING UNITS 0802020]. -- NEW MADRID-ST. JOHNS . MISSOURI ..

08020202 -- UPPER ST . FRANCIS. MISSOURI .

08020203 -- LOWER ST . FRANCIS. ARKANSAS,

MISSOURI .

08020204 -- LITTLE RIVER DITCHES . ARKANSAS

MISSOURI .

0802020`) -- L'ANGUILLE . ARKANSAS .

ACCOUNTING UNIT 080203 -- LOWER WHITE : THE WHITE RIVER BASIN BELOW

THE LITTLE RED RIVER BASIN .

ARKANSAS, MISSOURI .

CATALOGING UNITS 0802030]. -- LOWER WHITE-BAYOU DES ARC. ARKANSAS .

08020302 -- CACHE . ARKANSAS, MISSOURI .

08020303 -- LOWER WHITE . ARKANSAS .

08020304 -- BIG. ARKANSAS .

ACCOUNTING UNIT 080204 -- ;LOWER ARKANSAS : THE ARKANSAS RIVER BASIN

BELOW THE PLUM BAYOU BASIN .

ARKANSAS .

CATALOGING UNITS 08020401. -- LOWER ARKANSAS . ARKANSAS .

A46
H Y D R 0 L 0 G :I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

CATALOGING UNITS 08030201 --

08030202 --

08030203 -

08030204 --

08030205 --

08030206 --

0803020'7 --

08030208 --

08030209 --

08020402 -- BAYOU METO . ARKANSAS .

SUBREGION 0803 -- LOWER MISSISSIPPI - YAZOO: THE MISSISSIPPI RIVER

BASIN FROM TIRE ARKANSAS RIVER BASIN TO AND

INCLUDING THE YAZOO RIVER BASIN; EXCLUDING ALL

DRAINAGE WEST OF THE WEST-BANK LEVEE BELOW THE

ARKANSAS RIVER BASIN. ARKANSAS, LOUISIANA,

MISSISSIPPI, AND TENNESSEE .

ACCOUNTING UNIT 080301 -- LOWER MISSISSIPPI-GREENVILLE : THE

MISSISSIPPI ALLUVIAL LANDS LYING IN THE

FLOOD PLAIN OF THE PRESENT CHANNEL OF THE

MISSISSIPPI RIVER BETWEEN THE EAST-BANK

AND THE !WEST-BANK LEVEES, FROM THE

EAST-BANK RIVER TO THE YAZOO RIVER.

ARKANSAS, MISSISSIPPI .

CATALOGING UNIT 08030100 -- LOWER MISSISSIPPI-GREENVILLE .

ARKANSAS, LOUISIANA, MISSISSIPPI .

ACCOUNTING UNIT 080302 -- YAZOO: THE YAZOO RIVER BASIN. LOUISIANA,

MISSISSIPPI, TENNESSEE..

LITTLE TALLAHATCHIE . MISSISSIPPI .

TALLAHATCHIE . MISSISSIPPI .

YOCONA . MISSISSIPPI .

COLDWATER. MISSISSIPPI, TENNESSEE.

YALOBUSHA. MISSISSIPPI .

UPPER YAZOO. MISSISSIPPI .

BIG SUNFLOWER . MISSISSIPPI .

LOWER YAZOO. LOUISIANA, MISSISSIPPI .

DEER-STEELE . LOUISIANA, MISSISSIPPI .

SUBREGION 0804 -- LOWER RED -- OUACHITA : THE RED RIVER BASIN BELOW' THE.

BAYOU RIGOLETTE BASIN, EXCLUDING THE BOEUF

AND TENSAS RIVER BASINS . ARKANSAS, LOUISIANA.

ACCOUNTING UNIT 080401 -- UPPER OUACHITA : THE OUACHITA RIVER BASIN

ABOVE THE TWO BAYOU BASIN

ARKANSAS .

CATALOGING UNITS 08040101 -- OUACHITA HEADWATERS . ARKANSAS .

08040102 -- UPPER OUACHITA . ,ARKANSAS .

0804010.3 -- LITTLE MISSOURI . ARKANSAS .

ACCOUNTING UNIT 080402 -- :LOWER OUACHITA : THE OUACHITA RIVER BASIN

BELOW AND INCLUDING THE TWO BAYOU

BASIN. ARKANSAS, LOUISIANA.

A4 7
H Y D R 0 L O°G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGI:ONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

CATALOGING UNITS 08040201 -- LOWER OUACHITA-SMACKOVER . ARKANSAS .

08040202 -- LOWER OUACHITA-BAYOU DE LOUTRE .

ARKANSAS, LOUISIANA.

08040203 -- UPPER SALINE . ARKANSAS .

08040204 -- LOWER SALINE . ARKANSAS .

08040205 -- BAYOU BARTHOLOMEW . ARKANSAS,

LOUISIANA.

08040206 °- 13AYOU D'ARBONNE. ARKANSAS,

LOUISIANA.

08040207 -- LOWER OUACHITA . LOUISIANA .

ACCOUNTING UNIT 080403 -- LOWER RED: THE RED RIVER BASIN BELOW THE

BAYOU RIGOLETTE BASIN, EXCLUDING

THE BOEUF, OUACHITA, AND TENSAS RIVER

BASINS . LOUISIANA.

CATALOGING UNITS 08040301 -- LOWER RED. LOUISIANA.

0804030:? -- CASTOR . LOUISIANA.

08040303 °- DUGDEMONA. LOUISIANA.

08040304 -- LITTLE . LOUISIANA.

08040305 -- BLACK. LOUISIANA.

08040306 -- BAYOU COCODRIE . LOUISIANA.

SUBREGION 0805 -- BOEUF-TENSAS : THE BOEUF AND TENSAS RIVER BASINS .

ARKANSAS, LOUISIANA.

ACCOUNTING UNIT 080500 -- BOEUF-TENSAS . ARKANSAS, LOUISIANA.

CATALOGING UNITS 08050001 °- BOEUF. ARKANSAS, LOUISIANA.

08050002 -- BAYOU MACON. ARKANSAS, LOUISIANA .

0805000:3 -- TENSAS . LOUISIANA.

SUBREGION 0806 -- LOWER MISSISSIPPI - BIG BLACK: THE MISSISSIPPI[

RIVER BASIN FROM THE YAZOO RIVER BASIN TO THE LOWER

OLI) RIVER DRAINAGE BOUNDARY, BUT EXCLUDING ALL THE

DRAINAGE WEST OF THE WEST-BANK. LEVEE ALONG THE

MISSISSIPPI[ RIVER. LOUISIANA, MISSISSIPPI .

ACCOUNTING UNIT 080601 -- LOWER MISSISSIPPI-NATCHEZ : THE MISSISSIPPI

ALLUVIAL LANDS LYING IN THE FLOOD PLAIN OF

THE PRESENT CHANNEL OF THE MISSISSIPPI

RIVER 13ETWEEN THE WEST-BANK LEVEE AND THE

DRAINAGE BOUNDARIES OF THE MAJOR

TRIBUTARIES ALONG THE EAST BANK, FROM THE

THE YAZOO RIVER TO THE LOWER OLD RIVER .

LOUISIANA, MISSISSIPPI .

CATALOGING UNIT 08060100 --- LOWER MISSISSIPPI-NATCHEZ . LOUISIANA

A48
H Y D R O L O G I C U N I T C 0 D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGION'S,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

MISSISSIPPI .

ACCOUNTING U19IT 080602 -- BIG BLACK - HOMOCHITTO : THE DRAINAGE

BASINS EAST OF THE MISSISSIPPI RIVER FROM

THE YAZOO RIVER BASIN TO AND INCLUDING THE

BUFFALO RIVER BASIN, BUT EXCLUDING THE

ALLUVIAL LANDS LYING IN THE FLOOD PLAIN

OF THE PRESENT CHANNEL OF THE MISSISSIPPI;

RIVER EAST OF WEST-BANK LEVEE.

LOUISIANA, MISSISSIPPI .

CATALOGING UNITS 08060201 --- UPPER BIG BLACK. MISSISSIPPI: .

08060202 --- LOWER BIG BLACK. LOUISIANA,

MISSISSIPPI .

08060203 -- BAYOU PIERRE . LOUISIANA,

MISSISSIPPI .

08060204 -- COLES CREEK. LOUISIANA, MISSISSIPPI ..

08060205 -- HOMOCHITTO . MISSISSIPPI .

08060206 -- BUFFALO. MISSISSIPPI .

SUBREGION 0807 -- LOWER MISSISSIPPI-LAKE MAUREPAS : THE MISSISSIPPI

RIVER BASIN FROM THE LOWER OLD RIVER DRAINAGE

BOUNDARY TO THE BONNET CARRE FLOODWAY, AND

INCLUDING THE LOWER GRAND RIVER BASIN WEST OF THE

WEST-BANK LEVEE . LOUISIANA, MISSISSIPPI .

ACCOUNTING UNIT 080701 -- LOWER MISSISSIPPI-BATON ROUGE: THE

MISSISSIPPI ALLUVIAL LANDS LYING IN THE

FLOOD PLAIN OF THE PRESENT CHANNEL OF THE

MISSISSIPPI RIVER BETWEEN THE WEST-BANK

LEVEE AND THE EAST-BANK LEVEE OR THE

DRAINAGE BOUNDARIES OF THE MAJOR

TRIBUTARIES ALONG THE EAST BANK, FROM THE

LOWER OLD RIVER TO THE BONNET CARRE

FLOODWAY . LOUISIANA.

CATALOGING UNIT 08070100 -- LOWER MISSISSIPPI-BATON ROUGE.

LOUISIANA.

ACCOUNTING UNIT 080702 -- LAKE MAUREPAS : THE DRAINAGE BASINS EAST OF

THE MISSISSIPPI RIVER FROM THE BUFFALO)

RIVER BASIN TO THE BONNET CARRE

FLOODWAY, BUT EXCLUDING THE MISSISSIPPI

ALLUVIAL LANDS EAST OF THE WEST-BANK LEVEE

AND INCLUDING DRAINAGE FROM THE NORTH INTO

LAKE PONTCHARTRAIN, EAST TO AND INCLUDING

THE; TANGIPAHOA RIVER BASIN.

LOUISIANA, MISSISSIPPI .

A49
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS i4ND CATALOGING UNITS (CONTINUED)

CATALOGING UNITS 08070201 --- BAYOU SARA-THOMPSON. LOUISIANA,

MISSISSIPPI .

08070202 --- AMITE . LOUISIANA, MISSISSIPPI .

08070'203 --- TICKFAW. LOUISIANA, MISSISSIPPI .

08070204 --- LAKE MAUREPAS . LOUISIANA.

08070205 --- TANGIPAHOA . LOUISIANA, MISSISSIPPI .

ACCOUNTING UNIT 080703 -- LOWER GRAND : THE LOWER GRAND RIVER BASIN .

LOUISIANA .

CATALOGING UNIT 08070300 --- LOWER GRAND. LOUISIANA.

SUBREGION 0808 -- LOUISIANA COASTAL: THE LOUISIANA COASTAL DRAINAGE,

INCLUDING ISLANDS AND ASSOCIATED WATERS, SOUTH OF

THE RED RIVER BASIN BOUNDARY AND WEST OF THE

EAST-BANK LEVEE OF THE ATCHAFALAYA BASIN FLOODWAY,

TO THE SABINE RIVER AND SABINE LAKE DRAINAGE

BOUNDARY,. LOUISIANA.

ACCOUNTING UNIT OE10801 --- ATCHAFALAYA - VERMILION: THE LOUISIANA.

COASTAL DRAINAGE, INCLUDING ISLANDS AND

ASSOCIATED WATERS, SOUTH OF THE RED FIVER

BASIN BOUNDARY AND WEST OF THE EAST-BANK

LEVEE OF THE ATCHAFALAYA BASIN FLOODWAY,

TO AND INCLUDING THE DRAINAGE INTO

VERMILION BAY . LOUISIANA.

CATALOGING UNITS 080801.01. -- ATCHAFALAYA . LOUISIANA.

080801.02 -- BAYOU TECHE. LOUISIANA.

080801.03 -- VERMILION. LOUISIANA.

ACCOUNTING UNIT 060802 °- CALCASIEU - MERMENTAU: THE LOUISIANA

COASTAL DRAINAGE AND ASSOCIATED WATERS,

FROM THE VERMILION BAY DRAINAGE BOUNDARY

TO THE SABINE RIVER AND SABINE LAKE:

DRAINAGE BOUNDARY . LOUISIANA.

CATALOGING UNITS 08080'201. -- MERMENTAU HEADWATERS . LOUISIANA .

08080'2:02 -- MERMENTAU. LOUISIANA.

08080'203 -- UPPER CALCASIEU. LOUISIANA.

08080'2:04 -- WHISKY CHITTO . LOUISIANA.

08080'2;05 -- WEST FORK CALCASIEU . LOUISIANA.

08080'206 -- LOWER CALCASIEU . LOUISIANA.

SUBREGI:ON 0809 -- LOWER MISSISSIPPI : THE MISSISSIPPI RIVER BELOW 'THE

SONNET CARRE FLOODWAY, AND THE COASTAL DRAINAGE,

INCLUDING ISLANDS AND ASSOCIATED WATERS, FROM THE

PEARL RI'V'ER BASIN BOUNDARY AND THE MISSISSIPPIA5 0
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND, NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

LOUISIANA STATE LINE TO THE EAST-BANK LEVEE OF THE

ATCHAFALAYA BASIN FLOODWAY, EXCLUDING THE DRAINAGE

FROM THE NORTH INTO LAKE PONTCHARTRAIN, 'EAST TO THE

TCHEFUNCTA RIVER DRAINAGE BOUNDARY ; AND EXCLUDING

THE LOWER GRAND RIVER BASIN. LOUISIANA.

ACCOUNTING UNIT 080901 -°- LOWER MISSISSIPPI-NEW ORLEANS : THE

MISSISSIPPI RIVER BELOW THE BONNET CARRE

FLOODWAY,INCLUDING THE MISSISSIPPI DELTA.

LOUISIANA.

CATALOGING UNIT 08090100 -- LOWER MISSISSIPPI-NEW ORLEANS.

LOUISIANA.

ACCOUNTING UNIT 080902 --- LAKE PONTCHARTRAIN : LAKE PONTCHARTRAIN

AND THE COASTAL DRAINAGE, INCLUDING

:ISLANDS AND ASSOCIATED WATERS, ''FROM THE

PEARL RIVER BASIN BOUNDARY AND THE

MISSISSIPPI-LOUISIANA STATE LINE TO THE

EAST-BANK LEVEE OF THE MISSISSIPPI RIVER,

EXCLUDING THE DRAINAGE FROM THE NORTH

INTO LAKE PONTCHARTRAIN, EAST TO THE

TCHEFUNCTA RIVER DRAINAGE BOUNDARY .

LOUISIANA.

CATALOGING UNITS 0809CI201 -- LIBERTY BAYOU-TCHEFUNCTA . LOUISIANA.

0809CI202 -- LAKE PONTCHARTRAIN . LOUISIANA.

0809CI203 -- EASTERN LOUISIANA COASTAL .

LOUISIANA .

ACCOUNTING UNIT 080903 --- CENTRAL LOUISIANA COASTAL : THE COASTAL

DRAINAGE, INCLUDING ISLANDS AND

ASSOCIATED WATERS, FROM THE WEST-BANK

LEVEE OF THE MISSISSIPPI RIVER TO THE

EAST-BANK LEVEE OF THE ATCHAFALAYA BASIN

FLOODWAY ; EXCLUDING THE LOWER GRAND RIVER

BASIN . LOUISIANA.

CATALOGING UNITS 0809CI301 -- EAST CENTRAL LOUISIANA COASTAL .

LOUISIANA .

0809CI302 -- WEST CENTRAL LOUISIANA COASTAL .

LOUISIANA.

REGION 09 SOURIS-RED-RAINY REGION -- THE DRAINAGE WITHIN THE UNITED

STATES OF THE LAKE; OF THE WOODS AND THE RAINY, RED, AND

SOURIS RIVER BASINS THAT ULTIMATELY DISCHARGES INTO LAKE

WINNIPEG AND HUDSON BAY . INCLUDES PARTS OF MINNESOTA,

A51
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREG.IONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

MONTANA, NORTH DAKOTA, AND SOUTH DAKOTA

CATALOGING UNITS 09010001,1 -- UPPER SOURIS . NORTH DAKOTA .

090100012 -- DES LACS . NORTH DAKOTA .

090100013 -- LOWER SOURIS . NORTH DAKOTA .

090100014 -- WILLOW . NORTH DAKOTA .

09010001!5 -- DEEP . NORTH DAKOTA .

SUBREGIO'N 0901 -- SOURIS . THE SOURIS RIVER BASIN WITHIN THE UNITED

STATES . NORTH DAKOTA .

ACCOUNTING UNIT 090100 -- f>OURIS . NORTH DAKOTA

SUBREGION 0902 -- RED : THE RED RIVER BASIN WITHIN THE UNITED STATES

INCLUDING THE DEVILS LAKE CLOSED BASIN .

MINNESOTA, NORTH DAKOTA. SOUTH DAKOTA.

ACCOUNTING UNIT 090201 -- UPPER RED: THE RED RIVER BASIN ABOVE TFiE

CONFLUENCE OF AND INCLUDING THE GOOSE AND

MARSH RIVER BASINS, EXCLUDING THE SHEYENNE

RIVER BASIN AND THE DEVILS LAKE CLOSED

BASIN . MINNESOTA, NORTH DAKOTA,

SOUTH DAKOTA.

CATALOGING UNITS 0902010, 1 --- BOIS DE SIOUX . MINNESOTA,

NORTH DAKOTA, SOUTH DAKOTA.

09020102 -- MUSTINKA. MINNESOTA .

09020103 °- OTTER TAIL . MINNESOTA .

09020104 -- UPPER RED . MINNESOTA,

NORTH DAKOTA.

09020105 -- WESTERN WILD RICE . NORTH DAKOTA,

SOUTH DAKOTA .

09020.106 -- BUFFALO . MINNESOTA .

09020.107 --- ELM-MARSH. MINNESOTA, NORTH DAKOTA .

09020.108 °-EASTERN WILD RICE . MINNESOTA.

09020:109 -- GOOSE . NORTH DAKOTA .

ACCOUNTING UNIT 090202 -- DEVILS LAKE-SHEYENNE : THE SHEYENNE RIVER

BASIN AND THE DEVILS LAKE CLOSED BASIN

DRAINAGE . NORTH DAKOTA .

CATALOGING UNITS 090202070 -- DEVILS LAKE. NORTH DAKOTA .

09020202 -- UPPER SHEYENNE . NORTH DAKOTA .

09020203 -- MIDDLE SHEYENNE . NORTH DAKOTA .

09020204 -- LOWER SHEYENNE . NORTH DAKOTA.

0.9020205 -- MAPLE . NORTH DAKOTA .

ACCOUM71KG UNIT 090203 -- LOWER RED : THE RED RIVER BASIN WITHIN THE

UNITED STATES BELOW THE CONFLUENCE OF THE

A52
SUBREGION 0903 --

HYDR0L0GI C: UN IT CODES

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREG'IONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

CATALOGING UNITS 09020301--

CATALOGING UNITS

09020302

09020303

09020304

09020305

09020306

09020307 --

09020308 --

09020309 -_

090203].0 --

09020311 --

0902037.2 --

09020313 --

0902033:4 --

ACCOUNTING 'UNIT 090300 --- RAINY. MINNESOTA.

GOOSE AND MARSH RIVER BASINS . MINNESOTA,

NORTH DAKOTA .

SANDHILL-WILSON . MINNESOTA,

NORTH DAKOTA.

RED LAKES. MINNESOTA.

RED LAKE . MINNESOTA.

THIEF . MINNESOTA.

CLEARWATER. MINNESOTA.

GRAND MARAIS-RED . MINNESOTA,

NORTH DAKOTA.

TURTLE . NORTH DAKOTA.

FOREST . NORTH DAKOTA .

SNAKE . MINNESOTA.

PARK. NORTH DAKOTA .

LOWER RED. MINNESOTA,

TWO RIVERS . MINNESOTA.

PEMBINA. NORTH DAKOTA .

ROSEAU . MINNESOTA.

RAINY : THE RAINY RIVER BASIN AND LAKE OF THE WOODS

DRAINAGE 'WITHIN THE UNITED STATES . MINNESOTA.,

09030001 -- RAINY HEADWATERS . MINNESOTA.

09030002 -- VERMILION. MINNESOTA.

09030003 -- RAINY LAKE . MINNESOTA.

09030004 -- UPPER RAINY. MINNESOTA.

09030005 -- LITTLE FORK. MINNESOTA_

09030006 -- BIG FORK . MINNESOTA.

09030007 -- RAPID. MINNESOTA.

09030008 ~--- LOWER RAINY. MINNESOTA.

09030009 -- LAKE OF THE WOODS. MINNESOTA.

REGION 10 MISSOURI. REGION --- 'THE DRAINAGE WITHIN THE UNITED STATES OF

(A)'THE MISSOURI RIVER BASIN, (B) THE SASKATCHEWAN RIVER

BASIN, AND (C) SE1 7ERAL SMALL CLOSED BASINS . INCLUDES ALL

OF NEBRASKA AND PARTS OF COLORADO, IOWA, KANSAS,

MINNESOTA, MISSOURI, MONTANA, NORTH DAKOTA, SOUTH DAKOTA,

AND 'WYOMING .

SUBREGION 1001 -- SASKATCHEWAN : THE SASKATCHEWAN RIVER BASIN WITHIN

THE UNITED STATES . MONTANA.

ACCOUNTING UNIT 1OC1100 --- SASKATCHEWAN . MONTANA.

A33

NORTH DAKOTA .
H Y D R 0 L 0 G 1 C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

CATALOGING UNITS 10010001 -- BELLY . MONTANA .

10010002 -- ST . MARY . MONTANA.

SUBREGION 1002 -- MISSOURI HEADWATERS : THE HEADWATERS OF THE MISSOURI

RIVER BASIN ABOVE THE CONFLUENCE OF AND INCLUDING

THE GALLATIN, JEFFERSON, AND MADISON RIVER BASINS .

MONTANA, WYOMING .

ACCOUNTING UNIT 100200 -- MISSOURI HEADWATERS . MONTANA,

WYOMING .

CATALOGING UNITS 10020001 -- RED ROCK . MONTANA .

10020002 -- BEAVERHEAD . MONTANA .

10020P03 -- RUBY . MONTANA.

10020004 -- BIG HOLE . MONTANA.

10020005 -- JEFFERSON . MONTANA .

10020006 -- BOULDER . MONTANA .

10020007 -- MADISON . MONTANA, WYOMING .

10020008 -- GALLATIN . MONTANA, WYOMING .

SUBREGION 1003 -- MISSOURI-MARIAS : THE MISSOURI RIVER BASIN BELOW THE

CONFLUENCE OF THE GALLATIN, JEFFERSON, AND

MADISON RIVER BASINS TO AND INCLUDING THE MARIAS,

RIVER BASIN . MONTANA.

ACCOUNTING UNIT 100301 --- UPPER MISSOURI : THE MISSOURI RIVER BASIN

BELOW THE CONFLUENCE OF THE GALLATIN,

JEFFERSON, AND MADISON RIVER BASINS TO,

BUT EXCLUDING THE MARIAS RIVER BASIN .

MONTANA .

CATALOGING UNITS 1003 3101 -- UPPER MISSOURI .'MONTANA .

1003,3102 -- UPPER MISSOURI-DEARBORN . MONTANA .

100301.03 -- SMITH. MONTANA .

10030104 -- SUN. MONTANA .

10030105 -- BELT . MONTANA .

ACCOUNTING UNIT 100302 - MARIAS : THE MARIAS RIVER BASIN .

MONTANA.

CATALOGING UNITS 1003,3201 -- TWO MEDICINE . MONTANA .

1003,3202 -- CUT BANK. MONTANA .

10030203 -- MARIAS . MONTANA.

10030204 -- WILLOW . MONTANA .

1003,3205 -- TETON . MONTANA.

SUBREGION 1004 -- MISSOURI-MUSSELSHELL : THE MISSOURI RIVER; BASIN

BELOW THE CONFLUENCE OF THE MARIAS RIVER. BASIN TO

AS4
11YDR1)L0G I C UN I T CODES

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

FORT PECK DAM. MONTANA.

ACCOUNTING UNIT 100401 -- FORT PECK LAKE . THE MISSOURI RIVER BASIN

BELOW THE CONFLUENCE OF THE MARIAS RIVER

BASIN TO FORT PECK DAM, EXCLUDING THE

MUSSELSHELL RIVER BASIN. MONTANA.

CATALOGING UNITS 10040101. -- BULLWHACKER-DOG. MONTANA.

10040102 -- ARROW. MONTANA.

113040103 -- JUDITH . MONTANA.

10040104 -- FORT PECK RESERVOIR. MONTANA.

10040105 -- BIG DRY . MONTANA,.

10040106 -- LITTLE DRY. MONTANA.

ACCOUNTING UNIT 10040:2 -- MUSSELSHELL : THE MUSSELSHELL RIVER BASIN.

MONTANA.

CATALOGING UNITS 10040201. -- UPPER MUSSELSHELL . MONTANA.

11}040202 -- MIDDLE MUSSELSHELL . MONTANA.

10040203 -- FLATWILLOW . MONTANA.

10040204 -- BOX ELDER. MONTANA.

10040205 -- LOWER MUSSELSHELL . MONTANA.

SUBREGION 1005 -- MILK : THE MILK RIVER BASIN WITHIN THE UNITED

STATES, INCLUDING THE WILD HORSE LAKE CLOSED BASIN.

MONTANA.

ACCOUNTING UNIT 100501) -- MILK . MONTANA.

CATALOGING UNITS 10050001 -- MILK HEADWATERS . MONTANA.

10050002 -- UPPER .MILK . MONTANA.

10050003 -- WILD HORSE LAKE . MONTANA.

113050004 -- MIDDLE MILK . MONTANA.

113050005 -- BIG SANDY. MONTANA.

10050006 -- SAGE . MONTANA.

10050007 -- LODGE. MONTANA.

10050005 -- BATTLE . MONTANA.

10050009 -- PEOPLES. MONTANA.

113050010 -- COTTONWOOD . MONTANA.

113050011 -- WHITEWATER . MONTANA.

10050012 -- LOWER MILK . MONTANA.

11DO50013 -- FRENCHMAN. MONTANA.

110050014 -- BEAVER. MONTANA.

0050015 -- Rock . MONTANA.

10050016 -- PORCUPINE. MONTANA.

SUBREGION 1006 -- MISSOURI-POPLAR : THE MISSOURI RIVER BASIN WITHIN

THE UNITED STATES FROM FORT PECK DAM TO THE'

CONFLUENCE WITH THE YELLOWSTONE RIVER BASIN.

A55
H Y D R 0 .L 0 G I: C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

MONTANA.

ACCOUNTING UNIT 100600 --- MISSOURI-POPLAR . MONTANA.

CATALOGING UNITS 10060001 -- PRARIE ELK-WOLF . MONTANA.

10060002 -- REDWATER . MONTANA.

10060003 -- POPLAR . MONTANA.

10060004 -- WEST FORK POPLAR . MONTANA.

10060005 -- CHARLIE-LITTLE MUDDY. MONTANA,

NORTH DAKOTA .

10060006 -- BIG MUDDY. MONTANA, NORTH DFLKOTA .

10060007 -- BRUSH LAKE CLOSED BASIN. MONTANA,

NORTH DAKOTA .

SUBREGION 1007 -- UPPER YELLOWSTONE : THE YELLOWSTONE RIVER BASIN

ABOVE THE CONFLUENCE WITH THE BIGHORN RIVER BASIN.

MONTANA, WYOMING .

ACCOUNTING UNIT 100700 --- UPPER YELLOWSTONE . MONTANA, WYOMING.

CATALOGING UNITS 10070001 -- YELLOWSTONE HEADWATERS . MONTANA,

WYOMING.

10070002 -- UPPER YELLOWSTONE . MONTANA,

WYOMING .

10070003 -- SHIELDS . MONTANA.

10070004 -- UPPER YELLOWSTONE-LAKE BASIN .

MONTANA.

10070005 -- STILLWATER . MONTANA.

10070006 -- CLARKS FORK 'YELLOWSTONE . MONTANA,

WYOMING .

10070007 -- UPPER YELLOWSTONE-POMPEYS PILLAR .

MONTANA.

10070008 -- PRYOR. MONTANA.

SUBREGION 1008 -- BIG HORN : THE BIG HORN RIVER BASIN. MONTANA,

WYOMING.

ACCOUNTING UNIT 100800 --- BIG HORN . MONTANA, WYOMING .

CATALOGING UNITS 10080001 --

10080002 --

10080003 -

10080004 --

10080005 --

10080006 --

10080007 --

10080008 --

10080009`--

10080010 --

UPPER WIND . WYOMING.

LITTLE WIND . WYOMING.

POPO AGIE . WYOMING.

MUSKRAT . WYOMING.

LOWER WIND . 'WYOMING .

BADWATER . WYOMING.

UPPER BIGHORN. WYOMING.

NOWOOD . WYOMING.

GREYBULL . WYOMING.

BIG HORN LAKE . MONTANA, WYOMING.

A5 6
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

].0080011. -- DRY. WYOMING.

1.0080012 -- NORTH FORK SHOSHONE . WYOMING .

7.0080013 -- SOUTH FORK SHOSHONE . WYOMING .

3.0080014 -- SHOSHONE . MONTANA, WYOMING .

1.0080015 -- LOWER BIGHORN. MONTANA.

3.0080016 -- LITTLE BIGHORN . MONTANA, WYOMING.

SUBREGION 1009 -- POWDER-TONGUE: THE POWDER AND TONGUE RIVER

BASINS . MONTANA, WYOMING.

ACCOUNTING (UNIT 100901 -- 'TONGUE : THE TONGUE RIVER BASIN.

]MONTANA,, WYOMING.

CATALOGING UNITS 1.0090101 -- UPPER TONGUE . MONTANA, WYOMING .

1.0090102 -- LOWER TONGUE . MONTANA.

ACCOUNTING UNIT 100902 -- ;POWDER : THE POWDER RIVER BASIN.

MONTANA, WYOMING.

CATALOGING UNITS 1.00902 01 -- MIDDLE FORK POWDER . WYOMING.

1.00902 02 -- UPPER POWDER . WYOMING .

1.0090203 -- SOUTH FORK POWDER . WYOMING.

1.0090204 -- SALT . WYOMING.

1.0090205 -- CRAZY WOMAN. WYOMING.

1.0090206 -- CLEAR. WYOMING.

1.0090207 -- MIDDLE POWDER . MONTANA, WYOMING..

1.0090208 -- LITTLE POWDER. MONTANA, WYOMING,.

1.0090209 -- LOWER POWDER. MONTANA.

1.0090210 -- MIZPAH . MONTANA.

SUBREGION 1010 -- LOWER YELLOWSTONE : THE YELLOWSTONE RIVER BASIN

BELOW THE CONFLUENCE WITH THE BIG HORN RIVER BASIN,

EXCLUDING 'THE TONGUE AND POWDER. RIVER BASINS .

MONTANA, NORTH DAKOTA .

ACCOUNTING UNIT 1010CIO -- LOWER YELLOWSTONE . MONTANA, NORTH DAKOTA .

CATALOGING UNITS 1.0100001 -- LOWER YELLOWSTONE-SUNDAY-MONTANA .

1.0100002 -- BIG PORCUPINE. MONTANA.

1.0100003 -- ROSEBUD. MONTANA. .

1.0100004 -- LOWER YELLOWSTONE . MONTANA,

NORTH DAKOTA .

1.0100005 -- O'FALLON . MONTANA.

SUBREGION 1011 -- MISSOURI-:LITTLE MISSOURI : THE MISSOURI RIVER BASIN

BELOW THE CONFLUENCE WITH THE YELLOWSTONE RIVER

BASIN TO GARRISON DAM. MONTANA, NORTH DAKOTA,

SOUTH DAKOTA, WYOMING.

A5 7
H Y D R O L O G I C: U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

ACCOUNTING 'UNIT 101101 -- ;LAKE SAKAKAWEA: THE MISSOURI RIVER BASIN

BELOW THE CONFLUENCE WITH THE YELLOWSTONE

:RIVER BASIN TO GARRISON DAM, EXCLUDING

THE LITTLE MISSOURI RIVER BASIN .

NORTH DAKOTA .

CATALOGING UNITS 101101®1 -- LAKE SAKAKAWEA. NORTH DAKOTA .

10110102 -- LITTLE MUDDY. NORTH DAKOTA.

ACCOUNTING UNIT 101102 -- :LITTLE MISSOURI : THE LITTLE MISSOURI: RIVER

;BASIN . MONTANA, NORTH DAKOTA,

SOUTH DAKOTA, WYOMING

CATALOGING UNITS 101102,01 -- UPPER LITTLE MISSOURI . MONTANA,

NORTH DAKOTA, SOUTH DAKOTA, WYOMING .

10110202 -- BOXELDER . MONTANA, NORTH DAKOTA,

SOUTH DAKOTA .

10110203 -- MIDDLE LITTLE MISSOURI . MONTANA,

NORTH DAKOTA .

10110204 -- BEAVER . MONTANA, NORTH DAKOTA .

10110205 -- LOWER LITTLE MISSOURI .

NORTH DAKOTA .

SUBREGION 10.12 -- CHEYENNE : THE CHEYENNE RIVER BASIN ABOVE THE

NORMAL OPERATING POOL OF LAKE OAHE . MONTANA,

NEBRASKA,, SOUTH DAKOTA, WYOMING.

ACCOUNTING (UNIT 101201 -- CHEYENNE : THE CHEYENNE RIVER BASIN ABOVE

THE NORMAL OPERATING POOL OF LAKE OAHE,

EXCLUDING THE BELLE FOURCHE RIVER BASIN.

NEBRASKA, SOUTH DAKOTA, WYOMING.

CATALOGING UNITS 10120101 --

10120102 --

10120103 -

10120104 --

10120105 --

10120106 --

10120107

10120108

10120109

101201,10 .

10120111

10120112

101201:13

ANTELOPE . WYOMING.

DRY FORK CHEYENNE . WYOMING.

UPPER CHEYENNE . WYOMING.

LANCE . WYOMING .

LIGHTNING. WYOMING .

ANGOSTURA RESERVOIR. NEBRASKA,

SOUTH DAKOTA, WYOMING.

BEAVER . SOUTH DAKOTA, WYOMING.

HAT . NEBRASKA, SOUTH DAKOTA,

WYOMING.

MIDDLE CHEYENNE-SPRING.

SOUTH DAKOTA .

RAPID . SOUTH DAKOTA .

MIDDLE CHEYENNE-ELK. SOUTH DAKOTA .

LOWER CHEYENNE . SOUTH DAKOTA.

CHERRY . SOUTH DAKOTA .

A58
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

ACCOUNTING UNIT 101202 -- BELLE FOURCHE: THE BELLE FOURCHE RIVER

BASIN. MONTANA, SOUTH DAKOTA, WYOMING.

CATALOGING UNITS 10120201L -- UPPER BELLE FOURCHE . SOUTH DAKOTA,

WYOMING.

10120202 -- LOWER BELLE FOURCHE . MONTANA,

SOUTH DAKOTA, WYOMING.

10120203 -- REDWATER . SOUTH DAKOTA, WYOMING .

SUBREGION 1011-! -- MISISOURI-OAHE : THE MISSOURI RIVER BASIN FROM

GARRISON DAM TO OAHE DAM, EXCLUDING THE CHEYENNE

RIVER BASIN ABOVE THE NORMAL OPERATING POOL OF LAKE

OAHE . NORTH DAKOTA, SOUTH DAKOTA .

ACCOUNTING UNIT 1013 01 -- LAKE OAHE : THE MISSOURI RIVER BASIN FROM

GARRISON DAM TO OAHE DAM, EXCLUDING THE

CHEYENNE RIVER BASIN ABOVE THE NORMAL

OPERATING POOL OF LAKE OAHE AND THE

CANNONBALL, GRAND, HEART, KNIFE, AND

MOREAU RIVER BASINS . NORTH DAKOTA,

SOUTH DAKOTA .

CATALOGING UNITS

CATALOGING UNITS

10130107. --

10130102 --

10130103 --

101301094 --

1013010_i --

10130106 --

PAINTED WOODS-SQUARE BUTTE .,

NORTH DAKOTA .

UPPER LAKE OAHE . NORTH DAKOTA,

SOUTH DAKOTA .

APPLE. NORTH DAKOTA .

BEAVER . NORTH DAKOTA .

LOWER LAKE OAHE . SOUTH DAKOTA .

WIEST MISSOURI COTEAU . NORTH DAKOTA,

SOUTH DAKOTA .

ACCOUNTING UNIT 101302 -- CANNONBALL-HEART-KNIFE : THE CANNONBALL,

HEART, SAND KNIFE RIVER BASINS .

NORTH DAKOTA, SOUTH DAKOTA .

10130207. -- KNIFE . NORTH DAKOTA .

10130201: -- UPPER HEART . NORTH DAKOTA .

10130203 -- LOWER HEART . NORTH DAKOTA .

101302094 -- UPPER CANNONBALL . NORTH DAKOTA .

1013020°_1 -- CEDAR. NORTH DAKOTA, SOUTH DAKOTA

10130206 -- LOWER CANNONBALL . NORTH DAKOTA .

ACCOUNTING UNIT 101303 -- GRAND-MOREAU : THE GRAND AND MOREAU RIVER

BASINS ABOVE THE NOR14AL OPERATING POOL

OF' LAKE OAHE . NORTH DAKOTA, SOUTH DAKOTA .

CATALOGING UNITS 10130301. -- NORTH FORK GRAND. NORTH DAKOTA,

SOUTH DAKOTA .

A59
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

10130302 -- SOUTH FORK GRAND. SOUTH DAKOTA .

1013CI303 -- GRAND. NORTH DAKOTA, SOUTH DAKOTA ..

10130304 -- SOUTH FORK MOREAU . SOUTH DAKOTA .

101301305 -- 'UPPER MOREAU . SOUTH DAKOTA .

101301306 -- LOWER MOREAU . SOUTH DAKOTA .

SUBREGION 1.014 -- MISSOURI:-WHITE : THE MISSOURI RIVER BASIN FROM'

OAHE DAM TO FORT RANDALL DAM. NEBRASKA,

SOUTH DAKOTA .

ACCOUNTING UNIT 101401 --- FORT RANDALL RESERVOIR: THE MISSOURI

RIVER BASIN FROM OAHE DAM TO FORT RANDALL

DAM, EXCLUDING THE WHITE RIVER BASIN

ABOVE THE NORMAL OPERATING POOL OF THE

FORT RANDALL RESERVOIR. SOUTH DAKOTA, .

CATALOGING UNITS 10140101 -- FORT RANDALL RESERVOIR.

SOUTH DAKOTA .

10140102 -- BAD. SOUTH DAKOTA .

10140103 -- MEDICINE KNOLL. SOUTH DAKOTA .

10140104 -- MEDICINE . SOUTH DAKOTA .

10140105 -- CROW . SOUTH DAKOTA .

ACCOUNTING 'UNIT 101.402 ---'WHITE : THE WHITE RIVER BASIN ABOVE THE

NORMAL OPERATING POOL OF THE FORT RANDALL

RESERVOIR. NEBRASKA, SOUTH DAKOTA .

CATALOGING UNITS 10140201 -- UPPER WHITE. NEBRASKA, SOUTH DAKOTA .

10140202 -- MIDDLE WHITE. SOUTH DAKOTA .

10140203 -- LITTLE WHITE. NEBRASKA,

SOUTH DAKOTA.

101410204 -- LOWER WHITE. SOUTH DAKOTA .

SUBREGION 1015 -- NIOBRARA : THE NIOBRARA RIVER BASIN AND THE PONCA

CREEK BASIN. NEBRASKA, SOUTH DAKOTA, WYOMING,.

ACCOUNTING UNIT 101.500 -- NIOBRARA . NEBRASKA, SOUTH DAKOTA, WYOMING.

CATALOGING UNITS 10150001 -- PONCA. NEBRASKA, SOUTH DAKOTA .

10150002 -- NIOBRARA HEADWATERS . NEBRASKA

WYOMING.

10150003 -- UPPER NIOBRARA . NEBRASKA,

SOUTH DAKOTA .

10150004 -- MIDDLE NIOBRARA . NEBRASKA,

SOUTH DAKOTA .

10150005 -- SNAKE . NEBRASKA .

10150006 -- KEYA PARA . NEBRASKA, SOUTH DAKOTA. .

10150007 -- LOWER NIOBRARA . NEBRASKA .,

A60
H Y D R O L O G I C U N I T C O D E S

ACCOUNTING UNIT 101600 -- JAMES. NORTH DAKOTA, SOUTH DAKOTA .

CATALOGING UNITS 10170201 -- MIDDLE BIG SIOUX COTEAU .

SOUTH DAKOTA .

10170202 -- UPPER BIG SIOUX. MINNESOTA,

SOUTH DAKOTA .

10170203 -- LOWER BIG SIOUX. IOWA,

MINNESOTA, SOUTH DAKOTA .

10170204 -- ROCK . IOWA, MINNESOTA .

SUBREGION 1018 -- NORTH PLATTE : THE NORTH PLATTE RIVER BASIN .

A6 1

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

SUBREGION 101.6 -- JAMES : THE ;TAMES RIVER BASIN. NORTH DAKOTA, SOUTH

DAKOTA .

CATALOGING UNITS 10160001 -- JAMES HEADWATERS . NORTH DAKOTA .

10160002 -- PIPESTEM . NORTH DAKOTA .

10160008 -- UPPER JAMES . NORTH DAKOTA,

SOUTH DAKOTA .

10160004 -- ELM. NORTH DAKOTA, SOUTH DAKOTA .

10160005 -- MUD. SOUTH DAKOTA .

10160006 -- MIDDLE JAMES . SOUTH DAKOTA .

10160007 -- EAST MISSOURI COTEAU .

SOUTH DAKOTA .

10160008 -- SNAKE . SOUTH DAKOTA .

10160009 -- TURTLE . SOUTH DAKOTA .

1016001.0 -- NORTH BIG SIOUX COTEAU .

SOUTH DAKOTA .

1016001.1 -- LOWER JAMES . SOUTH DAKOTA .

SUBREGION 101.7 -- MISSOURI-BIG SIOUX : THE MISSOURI RIVER BASIN FROM

FORT RANDALL DAM TO AND INCLUDING THE BIG SIOUX

RIVER BASIN,, BUT :EXCLUDING THE PONCA CREEK,,

NIOBIRARA RIVER, AND JAMES RIVER BASINS . IOWA,

MINNESOTA, NEBRASKA, SOUTH DAKOTA .

ACCOUNTING UNIT 101701 -- LEWIS AND CLARK LAKE : THE MISSOURI

RIVER BASIN FROM FORT RANDALL DAM TO THE

BIG SIOUX RIVER BASIN, BUT EXCLUDING THE

PONCA CREEK, NIOBRARA RIVER, AND JAMES

RIVER BASINS . NEBRASKA, SOUTH DAKOTA .

CATALOGING UNITS 10170101 -- LEWIS AND CLARK LAKE . NEBRASKA,

SOUTH DAKOTA .

10170102 -- VE;RMILLION . SOUTH DAKOTA .

10170103 -- SOUTH BIG SIOUX COTEAU . SOUTH DAKOTA

ACCOUNTING UNIT 10170;2 -- BIG SIOUX : THE BIG SIOUX RIVER BASIN .

IOWA, MINNESOTA, SOUTH DAKOTA .
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AMID CATALOGING UNITS (CONTINUED)

COLORADO, NEBRASKA, WYOMING.

ACCOUNTING UNIT 101800 -- NORTH PLATTE . COLORADO, NEBRASKA,,

WYOMING.

CATALOGING UNITS 10180001 -- NORTH PLATTE HEADWATERS . COLORADO .

10,180002 -- UPPER NORTH PLATTE . COLORADO,

WYOMING.

10180003 -- PATHFINDER-SEMINOE RESERVOIRS .

WYOMING.

10180004 -- MEDICINE BOW. WYOMING.

10180005 -- LITTLE MEDICINE BOW. WYOMING.

10180006 -- SWEETWATER. WYOMING.

10180007 -- MIDDLE NORTH PLATTE-CASPER.

WYOMING.

10180008 -- GLENDO RESERVOIR. WYOMING .

10180009 -- MIDDLE NORTH PLATTE-SCOTTS BLUFF.

NEBRASKA, WYOMING.

10180010 -- UPPER LARAMIE. COLORADO, WYOMING.

10180011 -- LOWER LARAMIE. WYOMING.

10180012 -- HORSE . NEBRASKA, WYOMING.

10180013 -- PUMPKIN . NEBRASKA, WYOMING .

10180014 -- LOWER NORTH PLATTE . NEBRASKA .

SUBREGION 1019 -- SOUTH PLATTE : THE SOUTH PLATTE RIVER BASIN.

COLORADO, NEBRASKA, WYOMING.

ACCOUNTING UNIT 101900 -- SOUTH PLATTE . COLORADO, NEBRASKA,

WYOMING.

CATALOGING UNITS 101'90001 -- SOUTH PLATTE HEADWATERS . COLORADO .

101'90002 -- UPPER SOUTH PLATTE . COLORADO .

101'90003 -- MIDDLE SOUTH PLATTE-CHERRY CREEK.

COLORADO .

101'90004 -- CLEAR . COLORADO .

101'90005 -- ST . VRAIN. COLORADO .

101'90006 -- BIG THOMPSON . COLORADO .

101'90007 -- CACHE LA POUDRE . COLORADO,

WYOMING.

101'90008 -- LONE TREE-OWL . COLORADO,

WYOMING .

101'90009 -- CROW . COLORADO, WYOMING.

101'90010 -- KIOWA . COLORADO .

101'90011 -- BIJOU. COLORADO .

101'90012 -- MIDDLE SOUTH PLATTE-STERLING .

COLORADO, NEBRASKA .

10 :1'90013 -- BEAVER . COLORADO .

101'90014 -- PAWNEE . COLORADO .

101'90015 -- UPPER LODGEPOLE . COLORADO,

A62
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

NEBRASKA, WYOMING.

].0190016 -° LOWER LODGEPOLE . COLORADO,

NEBRASKA, WYOMING.

1.0190017 -° SIDNEY DRAW . COLORADO, NEBRASKA,,

WYOMING.

3.0190018 -° LOWER SOUTH PLATTE . COLORADO,

NEBRASKA .

SUBREGION 1020 -- PLATTE : THE PLATTE RIVER BASIN BELOW THE CONFLUENCE

OF THE NORTH AND SOUTH PLATTE RIVER BASINS,

EXCLUDING THE ELKHORN AND LOUP RIVER BASINS .

NEBRASKA .

ACCOUNTING UNIT 102001 -- MIDDLE PLATTE : THE PLATTE RIVER BASIN

BELOW THE CONFLUENCE OF THE NORTH AND

SOUTH PLATTE RIVER BASINS TO THE

CONFLUENCE WITH THE LOUP RIVER BASIN .

NEBRASKA .

CATALOGING 'UNITS 10200101 -- MIDDLE PLATTE-BUFFALO . NEBRASKA.

10200102 -- WOOD . NEBRASKA .

10200103 -- MIDDLE PLATTE-PRAIRIE . NEBRASKA .

ACCOUNTING UNIT 1020C'2 -- LOWER PLATTE : THE PLATTE RIVER BASIN

BELOW THE CONFLUENCE WITH THE LOUP RIVER BASIN,

EXCLUDING THE ELKHORN RIVER BASIN. NEBRASKA .

CATALOGING 'UNITS 10200201 -- LOWER PLATTE-SHELL . NEBRASKA .

10200202 -- LOWER PLATTE . NEBRASKA .

10200203 -- SALT . NEBRASKA .

SUBREGION 1021 -- LOUP : THE LOUP RIVER BASIN. NEBRASKA .

ACCOUNTING UNIT 102100 -- LOUP . NEBRASKA .

CATALOGING 'UNITS 10210001 --

10210002 --

1021000.3 -

10210004 --

10210005 --

10210006 --

10210007 --

10210008 --

10210009 --

10210010 --

SUBREGION 1022 -- ELKHORN : THE ELKHORN RIVER BASIN . NEBRASKA .

ACCOUNTING UNIT 1022CO -- E:LKHORN . NEBRASKA .

UPPER MIDDLE LOUP . NEBRASKA .

DISMAL . NEBRASKA.

LOWER MIDDLE LOUP . NEBRASKA .

SOUTH LOUP . NEBRASKA .

MUD. NEBRASKA .

UPPER NORTH LOUP . NEBRASKA .

LOWER NORTH LOUP . NEBRASKA .

CA,LAMUS . NEBRASKA .

LOUP . NEBRASKA .

CEDAR. NEBRASKA .

A6 3
H Y D R O L O G I C: U N I T C O D E S

BOUNDARY DESCRIPTIONS AND, NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

CATALOGING UNITS

SUBREGION 1023 -- MISSOURI-LITTLE SIOUX: THE MISSOURI RIVER BASIN'

BELOW THE CONFLUENCE WITH THE BIG SIOUX RIVER BASIN

TO THE CONFLUENCE WITH THE PLATTE RIVER BASIN.

IOWA, MINNESOTA, NEBRASKA .

ACCOUNTING 'UNIT 102300 -- MISSOURI-LITTLE SIOUX. IOWA, MINNESOTA,

NEBRASKA .

CATALOGING UNITS 10230001. -- BLACKBIRD-SOLDIER . IOWA, NEBRASKA .

10230002 -- FLOYD. IOWA .

10230003 °- LITTLE SIOUX . IOWA, MINNESOTA

10230004 -- MONONA-HARRISON DITCH. IOWA .

10230005 -- MAPLE. IOWA .

10230006 -- BIG PAPILLION-MOSQUITO . IOWA,

NEBRASKA .

10230007 -- BOYER. IOWA.

SUBREGION 1024 -- MISSOURI-NISHNABOTNA : THE MISSOURI RIVER BASIN

BELOW THE CONFLUENCE WITH THE PLATTE RIVER BASIN TO

THE CONFLUENCE WITH THE KANSAS RIVER BASIN . IOWA.,

KANSAS, MISSOURI, NEBRASKA .

ACCOUNTING UNIT 102.400 -- MISSOURI-NISHNABOTNA . IOWA, KANSAS,

MISSOURI, NEBRASKA .

CATALOGING UNITS 10?.40001 -- KEG-WEEPING WATER. IOWA, MISSOURI,

NEBRASKA .

10240002 -- WEST NISHNABOTNA . IOWA .

10240003 -- EAST NISHNABOTNA . IOWA .

10240004 -- NISHNABOTNA . IOWA, MISSOURI .

1024000`.1 -- TARKIO-WOLF . IOWA, KANSAS, MISSOURI,

NEBRASKA .

10240006 °- LITTLE NEMAHA . NEBRASKA .

10240007 -- SOUTH FORK BIG NEMAHA . KANSAS

NEBRASKA .

10240008 -- BIG NEMAHA . KANSAS, NEBRASKA .

10240009 -- WEST NODAWAY. IOWA .

10240010 -- NODAWAY. IOWA, MISSOURI .

10240011 -- INDEPENDENCE-SUGAR . KANSAS,

MISSOURI .

102400112 -- PLATTE . IOWA, MISSOURI .

10240013 -- ONE HUNDRED AND TWO. IOWA, MISSOURI .

A64

10220001. -- UPPER ELKHORN . NEBRASKA .

10220002 -- NORTH FORK ELKHORN. NEBRASKA .

10220003 -- LOWER ELKHORN . NEBRASKA .

10220004 -- LOGAN . NEBRASKA .
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS A19D' CATALOGING UNITS (CONTINUED)

SUBREGION 1025 -- REPUBLICAN : THE REPUBLICAN RIVER BASIN .

COLORADO, KANSAS, NEBRASKA .

ACCOUNTING UNIT 102500 --- REPUBLICAN . COLORADO, KANSAS,

NEBRASKA .

CATALOGING UNITS 1.0250001 -- ARIKAREE . COLORADO, KANSAS,

NEBRASKA .

1.0250002 -- NORTH FORK REPUBLICAN . COLORADO,

KANSAS, NEBRASKA .

1.0250003 -- SOUTH FORK REPUBLICAN . COLORADO,

KANSAS, NEBRASKA .

1.0250004 -- UPPER REPUBLICAN . COLORADO,

KANSAS, NEBRASKA .

1.0250005 -- FRENCHMAN. COLORADO, NEBRASKA .

10250006 -- STINKING WATER. COLORADO, NEBRASKA .

1.0250007 -- RED WILLOW . NEBRASKA .

1.0250008 -- MEDICINE . NEBRASKA .

1.0250009 -- HARLAN COUNTY RESERVOIR. KANSAS

NEBRASKA.

1.0250010 -- UPPER SAPPA. KANSAS .

1.0250011 -- LOWER SAPPA. KANSAS, NEBRASKA .

1.0250012 --- SOUTH FORK BEAVER . COLORADO,

KANSAS .

1.0250013 -- LITTLE BEAVER. COLORADO, KANSAS ..

1.0250014 --- BEAVER . KANSAS, NEBRASKA .

1.0250015 --- PRAIRIE DOG. KANSAS, NEBRASKA .

1.0250016 --- MIDDLE REPUBLICAN . KANSAS, NEBRASKA. .

110250017 --- LOWER REPUBLICAN . KANSAS .

SUBREGION 1026 -- SMOKY HILL : THE SMOKY HILL RIVER BASIN. COLORADO,

KANSAS .

ACCOUNTING UNIT 102600 --- SMOKY HILL . COLORADO, KANSAS .

CATALOGING UNITS 10260001 --- SMOKY HILL HEADWATERS . COLORADO,

KANSAS .

10260002 --- NORTH FORK SMOKY HILL . COLORADO,

KANSAS .

10260003 --- UPPER SMOKY HILL . KANSAS .

10260004, --- LADDER . COLORADO, KANSAS .

10260005, --- HACKBERRY . KANSAS .

10260006 -- MIDDLE SMOKY HILL . KANSAS .

10260007 --- BIG. KANSAS .

:10260008 --- LOWER SMOKY HILL . KANSAS .

:10260009 -- UPPER SALINE . KANSAS .

1026001.0 -- LOWER SALINE . KANSAS .

:10260011.-- UPPER NORTH FORK SOLOMON. KANSAS .

10260012.-- LOWER NORTH FORK SOLOMON. KANSAS .

A65
H Y D R .0 L 0 G I C; U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

10260013 -- UPPER SOUTH FORK SOLOMON. KANSAS .

10260019E -- LOWER SOUTH FORK SOLOMON. KANSAS .

10260015 -- SOLOMON. KANSAS .

SUBREGION 1027 -- K_hNSAS : THE KANSAS RIVER BASIN, EXCLUDING THE

REPUBLICAN AND SMOKY HILL RIVER BASINS . KANSAS,

NEBRASKA, MISSOURI .

ACCOUNTING UNIT 102701 -- KANSAS : THE KANSAS RIVER BASIN, EXCLUDING

THE BIG BLUE, REPUBLICAN, AND SMOKY HILL

RIVER BASINS . KANSAS, MISSOURI .

CATALOGING UNITS 10270101. -- UPPER KANSAS . KANSAS .

10270102 -- MIDDLE KANSAS . KANSAS .

10270103 -- DELAWARE . KANSAS .

10270104 -- LOWER KANSAS . KANSAS, MISSOURI[ .

ACCOUNTING UNIT 102702 -- BIG BLUE : THE BIG BLUE RIVER BASIN.

KANSAS, NEBRASKA .

CATALOGING UNITS 10270201 °- UPPER BIG BLUE . NEBRASKA .

10270202 -- MIDDLE BIG BLUE . NEBRASKA .

10270203 -- WEST FORK BIG BLUE . NEBRASKA .

10270204 -- TURKEY . NEBRASKA .

10270205 -- LOWER BIG BLUE . KANSAS, NEBRASKA .

10270206 -- UPPER LITTLE BLUE . KANSAS,

NEBRASKA .

10270207 -- LOWER LITTLE BLUE . KANSAS,

NEBRASKA .

SUBREGION 1028 -- CHARITON-GRAND : THE CHARITON, GRAND, AND LITTLE;

CHARITON RIVER BASINS . IOWA, MISSOURI .

ACCOUNTING UNIT 102801 -- GRAND: THE GRAND RIVER BASIN . IOWA,

MISSOURI .

CATALOGING UNITS 10280101 -- UPPER GRAND . IOWA, MISSOURI .

10280102 -- THOMPSON . IOWA., MISSOURI .

10280103 -- LOWER GRAND . IOWA, MISSOURI .

ACCOUNTING UNIT 102802 -- CHARI'.PON : THE CHARITON AND LITTLE CHARITON

RIVER BASINS . IOWA, MISSOURI .

CATALOGING UNITS 10280201 °- UPPER CHARITON . IOWA, MISSOURI .

10280202 -- LOWER CHARITON . MISSOURI .

1028020;3 -- LITTLE CHARITON . MISSOURI .

SUBREGION 1029 -- GASCONADE-OSAGE: THE GASCONADE AND OSAGE RIVER

BASINS . KANSAS MISSOURI .

A6 6
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS

AND

CATALOGING UNITS (CONTINUED)

ACCOUNTING UNIT 102901 --- OSAGE : THE OSAGE RIVER BASIN .

:KANSAS, MISSOURI .

CATALOGING UNITS ].0290101 -- UPPER MARAIS DES CYGNES . KANSAS .

7.0290102 -- LOWER MARAIS DES CYGNES . KANSAS,

MISSOURI .

7.0290103 -- LITTLE OSAGE . KANSAS, MISSOURI .

1.0290104 -- MARMATON . KANSAS, MISSOURI .

7.0290105 -- HARRY S . TRUMAN RESERVOIR. MISSOURI .

1.0290106 -- SAC . MISSOURI .

1.0290107 -- POMME DE TERRE. MISSOURI .

1.0290108 -- SOUTH GRAND. KANSAS, MISSOURI .

1.0290109 --- LAKE OF THE OZARKS . MISSOURI .

1.0290110 --- NIANGUA. MISSOURI .

1'.0290111 --- LOWER OSAGE. MISSOURI .

ACCOUNTING UNIT 102902 --- GASC:ONADE . THE GASCONADE RIVER BASIN .

MISSOURI .

CATALOGING UNITS IL0290201 --- UPPER GASCONADE . MISSOURI .

IL0290202 --- BIG PINEY. MISSOURI.

IL0290203 --- LOWER GASCONADE . MISSOURI .

SUBREGION 1030 -- LOWER MISSOURI : THE MISSOURI RIVER BASIN BELOW THE

CONFLUENCE WITH THE KANSAS RIVER BASIN TO THE

CONFLUENCE WITH 17HE MISSISSIPPI RIVER, EXCLUDING

THE CHARITON, GASCONADE, GRAND, AND OSAGE RIVER

BASINS . KANSAS, MISSOURI .

ACCOUNTING UNIT 103001 --- LOWER MISSOURI-BLACKWATER . THE MISSOURI

RIVER BASIN BELOW THE CONFLUENCE WITH THE

KANSAS RIVER BASIN TO THE CONFLUENCE WITH

THE GASCONADE RIVER BASIN, EXCLUDING

THE

CHARITON, GASCONADE, GRAND, AND OSAGE

RIVER BASINS . KANSAS, MISSOURI .

CATALOGING UNITS 10300101.--- LOWER MISSOURI-CROOKED . KANSAS,

MISSOURI .

103001.02 --- LOWER MISSOURI-MOREAU. MISSOURI .

103001,03 --- LAMINE . MISSOURI: .

103001.09: --- BLACKWATER . MISSOURI .

ACCOUNTING UNIT 103002 --- LOWER MISSOURI . THE MISSOURI RIVER

BASIN BELOW THE CONFLUENCE WITH THE

GASCONADE RIVER BASIN TO THE CONFLUENCE

WITH THE MISSISSIPPI RIVER. MISSOURI .

CATALOGING UNIT 103010200 .-- LOWER MISSOURI . MISSOURI .

A67
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

REGION 11 ARKANSAS-WHITE-RED REGION -- THE DRAINAGE OF THE ARKANSAS,

WHITE, AND RED,RIVER BASINS ABOVE THE POINTS OF HIGHEST

BACKWATER EFFECT OF THE MISSISSIPPI RIVER. INCLUDES ALL OF

OKLAHOMA AND PARTS OF ARKANSAS, COLORADO, KANSAS, LOUISIANA,

MISSOURI, NEW MEXICO, AND TEXAS .

SUBREGION 1101 -- UPPER WHITE: THE WHITE RIVER BASIN ABOVE AND

INCLUDING THE LITTLE RED RIVER BASIN TO THE POINNT

OF HIGHEST BACKWATER EFFECT O? THE MISSISSIPPI

RIVER. ARKANSAS, MISSOURI .

ACCOUNTING UNIT 110100 -- UPPER WHITE . ARKANSAS, MISSOURI .

CATALOGING UNITS 11010001 -- 'BEAVER RESERVOIR. ARKANSAS, MISSOURI

11010002 -- ,JAMES . MISSOURI .

11010003 -- BULL SHOALS LAKE . ARKANSAS,

MISSOURI .

11010004 -- ]MIDDLE WHITE . ARKANSAS .

11010005 -- BUFFALO . ARKANSAS .

11010006 -- :NORTH FORK WHITE . ARKANSAS,

]MISSOURI .

11010007 -- UPPER BLACK. ARKANSAS,

]MISSOURI .

11010008 -- CURRENT . ARKANSAS, MISSOURI .

11010009 -- LOWER BLACK. ARKANSAS, MISSOURI .

11010010 -- SPRING . ARKANSAS, MISSOURI .

11010011 -- ELEVEN POINT . ARKANSAS, MISSOURI .

110100'.12 -- STRAWBERRY . ARKANSAS .

11010013 -- UPPER WHITE-VILLAGE. ARKANSAS .

11010014 -- LITTLE RED. ARKANSAS .

SUBREGIO:N 1102 -- UPPER ARKANSAS : THE ARKANSAS RIVER BASIN ABOVE ITS

INTERSECT WITH 'THE COLORADO-KANSAS STATE LINE .

COLORADO, KANSAS, NEW MEXICO .

ACCOUNTING UNIT 110200 -- UPPER ,ARKANSAS. COLORADO, KANSAS,

NEW MEXICO .

CATALOGING UNITS 11020001 -- ARKANSAS HEADWATERS . COLORADO .

11020002 -- 'UPPER ARKANSAS . COLORADO .

11020003 -- FOUNTAIN . COLORADO .

11020004 -- CHICO . COLORADO .

11020005 -- 'UPPER ARKANSAS--LAKE MEREDITH .

COLORADO .

11020006 -= HUERFANO . COLORADO .

11020007 -- APISHAPA . COLORADO .

A6 8
H Y D R 0 L 0 G I: C U N I T C O D E S

13OUNDARY DESCRIPTIONS-AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

1.1020008--- HORSE . COLORADO .

11020009 -- UPPER ARKANSAS-JOHN MARTIN

RESERVOIR. COLORADO, KANSAS .

11020010 -° PURGATOIRE . COLORADO, NEW MEXICO .

11020011 --- BIG SANDY . COLORADO

11020012 -- RUSH . COLORADO .

11020013 -- TWO BUTTE . COLORADO .

SUBREGION 1103 -- MIDDLE ARKANSAS : THE ARKANSAS RIVER BASIN BELOW

ITS INTERSECT WITH THE COLORADO-KANSAS STATE LINE.

TO AND INCLUDING THE WALNUT RIVER BASIN,

INCLUDING THE WHITEWOMAN CREEK CLOSED BASIN .

COLORADO, KANSAS .

ACCOUNTING UNIT 110300 -- MIDDLE ARKANSAS . COLORADO, KANSAS .

CATALOGING UNITS 11030007- -- MIDDLE ARKANSAS--LAKE MCKINNEY .

COLORADO, KANSAS .

11030002 -- WHITEWOMAN . COLORADO, KANSAS .

11030003 -- ARKANSAS-DODGE CITY . KANSAS .

11030004 -- COON-PICKEREL . KANSAS .

11030005 -- PAWNEE . KANSAS .

11030006 -- BUCKNER. KANSAS

1103000',1 -- UPPER WALNUT CREEK. KANSAS .

11030008 -- LOWER WALNUT CREEK. KANSAS .

11030009 -- RATTLESNAKE . KANSAS .

11030010 -- GAR-PEACE. KANSAS .

11030011 -- COW. KANSAS .

1103001:? -- LITTLE ARKANSAS . KANSAS .

1103001:3 -- MIDDLE ARKANSAS--SLATE . KANSAS .

11030014 -- NORTH FORK NINNESCAH. KANSAS .

1103001!5 -- SOUTH FORK NINNESCAH. KANSAS .

110300115 -- NINNESCAH . KANSAS .

1103001'7 -- UPPER WALNUT RIVER . KANSAS .

11030018 -- LOWER WALNUT RIVER. KANSAS .

SUBREGION 1104 -- UPPER CIMARRON : THE CIMARRON RIVER BASIN BELOW'

ITS HEADWATERS T'0 THE RIVER'S MOST DOWNSTREAM

INTERSECT WITH THE KANSAS-OKLAHOMA STATE LINE,

INCLUDING THE BEAR CREEK CLOSED BASIN.

COLORADO, :KANSAS, NEW MEXICO, OKLAHOMA .

ACCOUNTING UNIT 110900 -- UPPER C:IMARRON . COLORADO, KANSAS,

NEW MEXICO, OKLAHOMA .

CATALOGING UNITS 11040001 -- CIMARRON HEADWATERS . COLORADO,

NEW MEXICO, OKLAHOMA .

11040002 -- UPPER CIMARRON . COLORADO, KANSAS,

NEW MEXICO, OKLAHOMA .

A69
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

11040003 -- NORTH FORK CIMARRON . COLORADO,

KANSAS .

11040004 -- SAND ARROYO . COLORADO, KANSAS .

11040005 -- BEAR . COLORADO, KANSAS .

11040006 -- UPPER CIMARRON-LIBERAL . KANSAS,

OKLAHOMA .

11040007 -- CROOKED . KANSAS, OKLAHOMA .

110400018 -- UPPER CIMARRON-BLUFF . KANSAS,

OKLAHOMA .

SUBREGION 1105 -- LOWER CIMARRON : THE CIMARRON FIVER BASIN BELOW THE

RIVER'S MOST DOWNSTREAM INTERSECT WITH THE

KANSAS-OKLAHOMA STATE LINE TO THE CONFLUENCE WITH

THE ARKANSAS RIVER, INCLUDING THAT PORTION

INUNDATED BY KEYSTONE RESERVOIR. KANSAS, OKLAHOMA .

ACCOUNTING UNIT 110500 --- LOWER CIMARRON . KANSAS, OKLAHOMA .

CATALOGING UNITS 11050001 -- LOWER CIMARRON-EAGLE CHIEF. KANSAS,

OKLAHOMA .

11050002 -- LOWER CIMARRON-SKELETON . OKLAHOMA .

110`.10003 -- LOWER CIMARRON . OKLAHOMA .

SUBREGION 1106 -- ARKANSAS - KEYSTONE : THE ARKANSAS RIVER BASIN BELOW

THE. WALNUT' RIVER BASIN TO KEYSTONE DAM,

EXCLUDING THE CIMARRON RIVER BASIN.

KANSAS, OKLAHOMA .

ACCOUNTING UNIT 110600 --- ARKANSAS - KEYSTONE . KANSAS, OKLAHOMA .

CATALOGING UNITS 11060001 -- KAW LAKE . KANSAS, OKLAHOMA .

11060002 -- UPPER SALT FORK ARKANSAS . KANSAS,

OKLAHOMA.

11060003 -- MEDICINE LODGE . KANSAS, OKLAHOMA .

11060004 -- LOWER SALT FORK ARKANSAS . KANSAS,

OKLAHOMA .

11060005 -- CHIKASKIA. KANSAS, OKLAHOMA ..

11060006 -- BLACK BEAR-RED ROCK . OKLAHOMA .

SUBREGION 1107 -- NEOSHO - VERDIGRIS . THE NEOSHO AND VERDIGRIS RIVER

BASINS . ARKANSAS, KANSAS, MISSOURI, OKLAHOMA .

ACCOUNTING UNIT 110701 --- VERDIGRIS: THE VERDIGRIS RIVER BASIN.

KANSAS, OKLAHOMA .

CATALOGING UNITS 11070101 -- UPPER VERDIGRIS. KANSAS .

11070102 --FALL . KANSAS .

11070103 -- MIDDLE VERDIGRIS . KANSAS, OKLAHOMA .

A7 0
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

11070104 -- ELK. KANSAS .

11070105 --- LOWER VERDIGRIS. OKLAHOMA .

11070106 -- CANEY. KANSAS, OKLAHOMA .

11070107 -- BIRD . OKLAHOMA .

ACCOUNTING UNIT 11070:? -- NEOSHO : THE NEOSHO RIVER BASIN .

ARKANSAS KANSAS, MISSOURI, OKLAHOMA .

CATALOGING UNITS 11070201 --- NEOSHO HEADWATERS . KANSAS .

11070202 --- UPPER COTTONWOOD . KANSAS .

11070203 --- LOWER COTTONWOOD . KANSAS .

11070204 --- UPPER NEOSHO . KANSAS .

11070205 -- MIDDLE NEOSHO . KANSAS, OKLAHOMA .

11070206 --- LAKE 0' THE CHEROKEES . ARKANSAS,

KANSAS, MISSOURI, OKLAHOMA .

11070207 --- SPRING . KANSAS, MISSOURI,

OKLAHOMA.

11070208 --- ELK. ARKANSAS, MISSOURI,, OKLAHOMA.

11070209 -- LOWER NEOSHO . ARKANSAS, OKLAHOMA .

SUBREGION 1108 -- UPPER CANADIAN : THE CANADIAN RIVER BASIN ABOVE ITS

INTERSECT WITH THE NEW MEXICO-TEXAS STATE LINE .

COLORADO, NEW MEXICO .

ACCOUNTING UNIT 110800 -- UPPER CANADIAN . COLORADO, NEW MEXICO .

CATALOGING UNITS 11080001 --- CANADIAN HEADWATERS . COLORADO,

NEW MEXICO .

11080002 --- CIMARRON . NEW MEXICO .

11080003 -- UPPER CANADIAN . NEW MEXICO .

11080004 -° MORA . NEW MEXICO ..

11080005 --- CONCHAS. NEW MEXICO .

11080006 -° UPPER CANADIAN-UTE RESERVOIR.

NEW MEXICO, TEXAS.

11080007 -- UTE. NEW MEXICO .

1;1080008 --- REVUELTO . NEW MEXICO .

SUBREGION 1109 -- LOWER CANADIAN : THE CANADIAN RIVER BASIN BELOW ITS

INTERSECT WITH THE NEW MEXICO-TEXAS STATE LINE

TO THE CONFLUENCE WITH THE ARKANSAS RIVER,

INCLUDING THAT PORTION INUNDATED BY EUFAULA LAKE

AND ROBERT S . KERR RESERVOIR, BUT EXCLUDING THE

NORTH CANADIAN RIVER BASIN . NEW MEXICO,

OKLAHOMA, TEXAS .

ACCOUNTING UNIT 110901 -- MIDDLE CANADIAN : THE CANADIAN RIVER BASIN

BELOW ITS INTERSECT WITH THE

NEW MEXICO-TEXAS STATE LINE T+0 ITS

INTERSECT WITH THE OKLAHOMA-TEXAS STATE

A71
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

LINE . NEW MEXICO, OKLAHOMA, TEXAS .

CATALOGING UNITS 11090101 -- MIDDLE CANADIAN-TRUJILLO . NEW

MEXICO, TEXAS .

110901012 -- PUNTA DE AGUA . NEW MEXICO, TEXAS.

110901.03 -- RITA BLANCA . NEW MEXICO, OKLAHOMk,,

TEXAS.

11090104 -- CARRIZO . NEW MEXICO, TEXAS .

110901015 -- :LAKE MEREDITH . TEXAS .

110901,06 -° MIDDLE CANADIAN-SPRING. TEXAS .

ACCOUNTING UNIT 110902 --- LOWER CANADIAN : THE CANADIAN RIVER BASIN

BELOW ;ITS INTERSECT WITH THE OKLAHOMATEXAS STATE LINE TO THE CONFLUENCE WITH

THE AR{ANSAS RIVER, INCLUDING THAT POR'.CION

INUNDATED BY EUFAULA LAKE AND ROBERT S .

KERR RESERVOIR, BUT EXCLUDING THE NORTH

CANADIAN RIVER BASIN.. OKLAHOMA, TEXAS .

CATALOGING UNITS 11090201 -° LOWER CANADIAN-DEER . OKLAHOMA,

TEXAS .

11090202 -- (LOWER CANADIAN-WALNUT. OKLAHOMA .

11090203 -° (LITTLE . OKLAHOMA .

11090204 -- LOWER CANADIAN . OKLAHOMA .

SUBREGION 1110 -- NORTH CANADIAN : THE NORTH CANADIAN RIVER BASIN,

INCLUDING THAT PORTION INUNDATED BY EUFAULA LAKE .

KANSAS, NEW MEXICO, OKLAHOMA, TEXAS .

ACCOUNTING UNIT 111001 -- UPPER BEAVER . THE BEAVER RIVER BASIN TO

AND INCLUDING THE HOME CREEK BASIN .

KANSAS NEW MEXICO, OKLAHOMA,

TEXAS .

CATALOGING UNITS 11100101 -° UPPER BEAVER . NEW MEXICO,

OKLAHOMA, TEXAS .

11100102 -- 1l4IDDLE BEAVER . KANSAS, OKLAHOMA .

11100103 °- COLDWATER. OKLAHOMA, TEXAS .

11100104 -- PALO DURO . OKLAHOMA, TEXAS .

ACCOUNTING UNIT 111002 -- LOWER 13EAVER : THE BEAVER RIVER BASIN BELOW

THE HOME CREEK BASIN TO AND

INCLUDING THE WOLF CREEK BASIN.

OKLAHOMA, TEXAS.

CATALOGING UNITS 11100201 °- LOWER BEAVER . OKLAHOMA, TEXAS.

11100202 -- UPPER WOLF . TEXAS .

11100203 --°: LOWER WOLF . OKLAHOMA, TEXAS .

A7 2
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

ACCOUNTING UNIT 11100:3 -- LOWER NORTH CANADIAN : THE NORTH

CANADIAN RIVER BASIN, INCLUDING THAT

PORTION :INUNDATED BY EUFAULA LAKE, BUT

EXCLUDING THE BEAVER RIVER BASIN ABOVE ITS

CONFLUENCE WITH THE WOLF CREEK BASIN .

OKLAHOMA .

CATALOGING UNITS 11100301 -- MIDDLE NORTH CANADIAN . OKLAHOMA .

1.1100302 -- L01NER NORTH CANADIAN . OKLAHOMA .

11100303 -- DEEP FORK . OKLAHOMA .

SUBREGION 1111 -- LOWER ARKANSAS : THE ARKANSAS RIVER BASIN BELOW

KEYSTONE DAM TO THE POINT OF HIGHEST BACKWATER

EFFECT OF THE MISSISSIPPI RIVER BELOW LOCK AND :DAM

ON THE ARKANSAS RIVER, BUT EXCLUDING THE CANADIAN,

NEOSHO, AND VERDIGRIS RIVER BASINS . ARKANSAS,

OKLAHOMA .

ACCOUNTING UNIT 111101 -- ROBERT S . KERR RESERVOIR: THE ARKANSAS

RIVER BASIN BELOW KEYSTONE DAM TO LOCK A9D

DAM 13, BUT EXCLUDING THE CANADIAN,

NEOSHO, AND VERDIGRIS RIVER BASINS .

ARKANSAS . OKLAHOMA .

CATALOGING UNITS 11110101 -- POLECAT-SNAKE . OKLAHOMA .

11110102 -- DIRTY-GREENLEAF. OKLAHOMA .

11110103 -- ILLINOIS . ARKANSAS, OKLAHOMA .

11110104 -- ROBERT S . KERR RESERVOIR.

ARKANSAS, OKLAHOMA .

11110105 -- POTEAU . ARKANSAS, OKLAHOMA .

ACCOUNTING UNIT 111102 -- LOWER ARKANSAS-FOURCHE LA FAVE : THE

ARKANSAS RIVER BASIN BELOW LOCK AND DAM

13 TO THE POINT OF HIGHEST BACKWATER

EFFECT OF THE MISSISSIPPI RIVER BELOW LOCK

AND DAM 4 ON THE ARKANSAS RIVER.

ARKANSAS .

CATALOGING 'UNITS 1.1110201 -- FROG-MULBERRY . ARKANSAS .

1.1110202 -- DFLRDANELLE RESERVOIR. ARKANSAS .

1.1110203 -- LAKE CONWAY-POINT REMOVE .

ARKANSAS .

1.1110204 -- PETIT JEAN . ARKANSAS .

1.1110205 -- CADRON . ARKANSAS .

1.1110206 -° FOURCHE LA FAVE . ARKANSAS .

1.1110207 -° LOWER ARKANSAS-MAUMELLE .

ARKANSAS .

SUBREGION 1112 -- RED HEADWATERS : THE NORTH FORK RED RIVER,

A73
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

PlUkIRIE DOG TOWN FORK RED RIVER, AND THE SALT FORK

RED RIVER BASINS . NEW MEXICO, OKLAHOMA, TEXAS .

ACCOUNTING UNIT 111201 -- PRAIRIE. DOG TOWN FORK RED: THE PRAIRIE DOG

TOWN FORK RED RIVER BASIN. NEW MEXICO,

OKLAHOMA, TEXAS.

CATALOGING UNITS 11120101 -- TIERRA BLANCA . NEW MEXICO,

TEXAS .

11120102 °- PALO DURO . NEW MEXICO, TEXAS.

11120103 °° LIPPER PRAIRIE DOG TOWN FORK RED.

TEXAS .

11120104 -° TULE . TEXAS .

11120105 -° LOWER PRAIRIE DOG TOWN FORK RED.

OKLAHOMA, TEXAS.

ACCOUNTING UNIT 1112,02 -- SALT FORK RED : THE SALT FORK RED RIVER

:BASIN . OKLAHOMA, TEXAS.

CATALOGING UNITS 11120201 -- UPPER SALT FORK RED . TEXAS.

11120202 -- LOWER SALT FORK RED. OKLAHOMA,

TEXAS.

ACCOUNTING UNIT 111203 -- NORTH FORK RED: THE NORTH FORK RED RIVER

BASIN . OKLAHOMA, TEXAS .

CATALOGING UNITS 11120301 -- UPPER NORTH FORK RED. TEXAS .

11120302 -- MIDDLE NORTH FORK RED. OKLAHOMA,

TEXAS .

11120303 -- LOWER NORTH FORK RED. OKLAHOMA .

11120304 -- ELM FORK RED. OKLAHOMA, TEXAS .

SUBREGION 1113 -- RED - WASHITA: THE RED RIVER BASIN ABOVE

DENISON DAM, EXCLUDING THE NORTH FORK RED

RIVER, PRAIRIE DOG TOWN FORK RED RIVER, AND THE

SALT FORK :RED RIVER BASINS . OKLAHOMA, TEXAS.

ACCOUNTING UNIT 111301 -- RED-PEASE : THE RED RIVER BASIN

FROM THE PRAIRIE DOG TOWN FORK RED RIVER

BASIN TO THE CACHE CREEK BASIN,

EXCLUDING THE NORTH FORK RED RIVER AND THE

SALT FORK RED RIVER BASINS . OKLAHOMA,

TEXAS.

CATALOGING UNITS 11130101 -- GROESBECK-SANDY . OKLAHOMA,

TEXAS .

11130102 -- BLUE-CHINA. OKLAHOMA, TEXAS .

11130103 ---NORTH PEASE . TEXAS.

11130104 -- MIDDLE PEASE. TEXAS .

A7 4
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

CATALOGING UNITS 11140101.--

1].130105 -- PEASE . TEXAS.

ACCOUNTING UNIT 111302! -- RED-LAKE TEXOMA : THE RED RIVER BASIN FROM

AND INCLUDING THE CACHE CREEK

BASIN TO DENISON

DAM, INCLUDING THAT PORTION INUNDATED BY

LAKE TEXOMA, BUT EXCLUDING THE WASHITA

RIVER BASIN . OKLAHOMA, TEXAS .

CATALOGING UNITS 17.130201 °- FARMERS-MUD . OKLAHOMA, TEXAS.

17.130202--- CACHE . OKLAHOMA.

17.130203 -- WEST CACHE. OKLAHOMA .

17.130204 °- NORTH WICHITA. TEXAS.

11.130205 -- SOUTH WICHITA. TEXAS.

17.130206 °- WICHITA. TEXAS.

1].130207 -- SOUTHERN BEAVER . TEXAS .

17.130208 °- NORTHERN BEAVER . OKLAHOMA .

17.130209 --- LITTLE WICHITA. TEXAS .

17.130210--- LAKE TEXOMA . OKLAHOMA, TEXAS.

ACCOUNTING UNIT 111303 -- WASHITA. THE WASHITA RIVER BASIN,

INCLUDING THAT PORTION INUNDATED BY LAKE

TEXOMA . OKLAHOMA.

CATALOGING UNITS 1':130301 -- WASHITA HEADWATERS . OKLAHOMA,

TEXAS.

17.130302 --- UPPER WASHITA. OKLAHOMA .

1L130303 °- MIDDLE WASHITA. OKLAHOMA .

1L130304 --- LOWER WASHITA. OKLAHOMA .

SUBREGION 1114 -- RED-SULPHUR : THE RED RIVER BASIN BELOW DENISON DAM

TO AND INCLUDING THE BAYOU RIGOLETTE BASIN AT THE

POINT OF HIGHEST 13ACKWATER EFFECT OF THE

MISSISSIPPI RIVER. ARKANSAS, LOUISIANA,

OKLAHOMA, TEXAS .

ACCOUNTING UNIT 111401 -- RED-LITTLE : THE RED RIVER BASIN BELOW

DENISON DAM TO AND INCLUDING THE LITTLE

RIVER BASIN. ARKANSAS, OKLAHOMA,

TEXAS.

11140102 --

11140103 --

11140104 --

11140105 --

11140106 --

BOIS D'ARC-ISLAM) . OKLAHOMA,,

TEXAS.

BLUE . OKLAHOMA .

MUDDY BOGGY . OKLAHOMA .

CLEAR BOGGY . OKLAHOMA .

KIAMICHI . ARKANSAS, OKLAHOMA .

PECAN-WATERHOLE . ARKANSAS,

OKLAHOMA, TEXAS .

A7 5
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

111401 07 -- UPPER LITTLE . OKLAHOMA .

11140108 -- MOUNTAIN FORK . ARKANSAS, OKLAHOMA .

11140109 -- LOWER LITTLE . .ARKANSAS, OKLAHOMA .

ACCOUNTING UNIT 111402 --- RED-SALINE : THE RED :RIVER BASIN BELOW

'THE LITTLE RIVER BASIN TO AND

INCLUDING THE BAYOU RIGOLETTE BASIN AT 'THE

',POINT OF HIGHEST BACKWATER EFFECT OF' THE

MISSISSIPPI RIVER, EXCLUDING THE BIG

CYPRESS AND SULPHUR :RIVER BASINS .

ARKANSAS, LOUISIANA.

CATALOGING UNITS 11140201 -- MCKINNEY-POSTEN BAYOUS . ARKANSAS,

LOUISIANA, TEXAS .

11140202 -- MIDDLE RED-COUSHATTA. LOUISIANA.

11140203 -- LOGGY BAYOU. ARKANSAS, LOUISIANA.

11140204 -- RED CHUTE . LOUISIANA .

11140205 -- BODCAU BAYOU. ARKANSAS, LOUISIANA.

11140206 -- BAYOU PIERRE . LOUISIANA.

11140207 -- LOWER RED-LAKE IATT . LOUISIANA .

11140208 -- SALINE BAYOU . LOUISIANA.

11140209 -- BLACK LAKE BAYOU. LOUISIANA.

ACCOUNTING UNIT 111403 --- BIG CYPRESS - SULPHUR. THE CROSS BAYOU AND

SULPHUR RIVER BASINS,, INCLUDING

THE BIG CYPRESS CREEK BASIN .

ARKANSAS, LOUISIANA.

CATALOGING UNITS 11140301 -- SULPHUR HEADWATERS . TEXAS.

11140302 -- LOWER SULPHUR. ARKANSAS, TEXAS .

11140303 -- 'WHITE OAK BAYOU. TEXAS .

11140304 -- CROSS BAYOU. ARKANSAS, LOUISIANA,

'TEXAS .

11140305 -- LAKE O'THE PINES. TEXAS.

11140306 -- CADDO LAKE . LOUISIANA, TEXAS .

11140307 -- 'LITTLE CYPRESS. TEXAS .

REGION 12 TEXAS-GULF REGION --- THE ]DRAINAGE THAT DISCHARGES INTO THE

GULF OF MEXICO FROM AND INCLUDING SABINE PASS TO

THE RIO GRANDE BASIN BOUNDARY . INCLUDES PARTS OF

LOUISIANA, N]EW MEXICO, AND TEXAS .

SUBREGION 1201 -- SABINE : THE SABINE RIVER BASIN ABOVE SABINE LAKI'-

LOUISIANA, TEXAS .

ACCOUNTING UNIT 120100 ---- SABINE . LOUISIANA, TEXAS .

A7 6
H Y D R O L O G I C U N I T C O D E S

ACCOUNTING UNIT 120200 --- NECHES . TEXAS.

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

CATALOGING UNITS 3.2010001 -- UPPER SABINE . TEXAS.

1.2010002 -- MIDDLE SABINE . LOUISIANA, TEXAS .

1.2010003 -- LAKE FORK . TEXAS.

1.2010004 -- TOLEDO BEND RESERVOIR. LOUISIANAL,

TEXAS .

1.2010005 -- LOWER SABINE . LOUISIANA, TEXAS.

SUBREGION 1202 -- NECHES : THE NECHES RIVER BASIN ABOVE SABINE LAKE .

TEXAS .

CATALOGING UNITS 12020001 -- UPPER NECHES . TEXAS.

12020002 °- MIDDLE NECHES . TEXAS .

12020003 -- LOWER NECHES . TEXAS .

12020004 °- UPPER ANGELINA . TEXAS.

12020005, -- LOWER ANGELINA . TEXAS.

:1202000EI -- VILLAGE. TEXAS .

12020007 -- PINE ISLAND BAYOU . TEXAS .

SUBREGION 1203 -- TRINITY: THE TRINITY RIVER BASIN ABOVE TRINITY

BAY. TEXAS .

ACCOUNTING UNIT 120301 -- UPPER TRINITY : THE TRINITY RIVER BASIN

ABOVE AND INCLUDING THE RICHLAND CREEK

BASIN. TEXAS.

CATALOGING UNITS 12030101 --

1203010:'. --

1203010:3 -

12030104 --

12030105 --

12030106 -

12030107 --

1203010!3 --

1203010!3 --

UPPER WEST FORK TRINITY . TEXAS .

LOWER WEST FORK TRINITY . TEXAS.

ELM FORK TRINITY . TEXAS .

DENTON . TEXAS .

UPPER TRINITY . TEXAS .

EAST FORK TRINITY . TEXAS.

CEDAR. TEXAS .

RICHLAND . TEXAS .

CHAMBERS . TEXAS .

ACCOUNTING UNIT 120302 -- LOWER TRINITY: THE TRINITY RIVER BASIN

BELOW THE RICHLAND CREEK BASIN TO BUT

EXCLUDING TRINITY BAY. TEXAS .

CATALOGING UNITS 12030201 -- LOWER TRINITY-TEHUACANA . TEXAS.,

12030202 -- LOWER TRINITY-KICKAP00 . TEXAS .

12030203 -- LOWER TRINITY . TEXAS.

SUBREGION 1204 -- GALVESTON BAY-SAN JACINTO: THE COASTAL DRAINAGE

AND ASSOCIATED WATERS FROM AND INCLUDING SABINE

PASS TO THE BRAZOS RIVER BASIN BOUNDARY, BUT

EXCLUDING THE NECHES AND SABINE RIVER BASINS ABOVE

A7 7
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND ;NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

SABINE LAKE AND 'THE TRINITY RIVER BASIN ABOVE

TRINITY BAY . LOUISIANA, TEXAS .

ACCOUNTING UNIT 120401 -- SAN JACINTO : THE SAN JACINTO RIVER BASIN

ABOVE GALVESTON BAY . TEXAS.

CATALOGING UNITS 1.2040101 -- WIEST FORK SAN JACINTO. TEXAS .

1.2040102 -- SPRING . TEXAS .

1.2040103 --- EAST FORK SAN JACINTO. TEXAS .

1.2040104 -- BUFFALO-SAN JACINTO. TEXAS .

ACCOUNTING UNIT 120402 -- GALVESTON BAY-SABINE LAKE : THE COASTAL

DRAINAGE AND ASSOCIATED WATERS FROM AND

INCLUDING SABINE' PASS TO THE BRAZOS RIVER

BASIN BOUNDARY, BUT EXCLUDING THE NECHES

AND SABINE RIVER BASINS ABOVE SABINE LAKE,

THE TRINITY RIVER BASIN ABOVE TRINITY

BAY, AND THE SAN JACINTO RIVER BASIN ABOVE

GALVESTON BAY: LOUISIANA, TEXAS .

CATALOGING UNITS 12040201 --- SABINE LAKE . LOUISIANA, TEXAS.

12040202 --- EAST GALVESTON BAY. TEXAS .

12040203 --- NORTH GALVESTON BAY. TEXAS.

12040204 --- WIEST GALVESTON BAY . TEXAS .

12040205 --- AUSTIN-OYSTER . TEXAS.

SUBREGION 1205 -- BRAZOS HEADWATERS : THE BRAZOS RIVER BASIN ABOVE THE

CONFLUENCE OF AND INCLUDING THE DOUBLE MOUNTAIN FORK

BRAZOS RIVER AND THE SALT FORK BRAZOS RIVER BASINS .

NEW MEXICO, TEXAS.

ACCOUNTING UNIT 120500 -- BRAZOS HEADWATERS . NEW MEXICO, TEXAS.

CATALOGING UNITS 12050001 --- YELLOW HOUSE DRAW . NEW MEXICO,

TEXAS .

12050002 --- BLACKWATER DRAW . NEW MEXICO, TEXAS .

12050003 -- NORTH FORK DOUBLE MOUNTAIN FORK

BRAZOS . TEXAS .

12050004 -- DOUBLE MOUNTAIN FORK BRAZOS . TEXAS .

12050005 -- RUNNING WATER DRAW . NEW MEXICO,

TEXAS .

12050006 -- WHITE . TEXAS .

12050007 -- SALT FORK BRAZOS . TEXAS .

SUBREGION 1206 -- MIDDLE BRAZOS : THE BRAZOS RIVER BASIN BELOW THE

CONFLUENCE OF THE; DOUBLE MOUNTAIN FORK BRAZOS RIVER

AND 'THE SALT FORK: BRAZOS RIVER BASINS TO AND

INCLUDING THE CAS~TLEMAN CREEK BASIN .

TEXAS .

A7 8
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

ACCOUNTING UNIT 120601 -- MIDDLE BRAZOS-CLEAR FORK : THE BRAZOS RIVER.

BASIN BELOW THE CONFLUENCE OF THE DOUBLE

MOUNTAIN FORK BRAZOS RIVER AND THE

SALT FORK BRAZOS RIVER BASINS TO AND

INCLUDING THE CLEAR FORK BRAZOS RIVER

BASIN. TEXAS.

CATALOGING UNITS 12060101 --- MIDDLE BRAZOS-MILLERS . TEXAS .

12060102 --- UPPER CLEAR FORK BRAZOS . TEXAS .

1206010'.3 -- PAINT . TEXAS.

12060104 -- LOWER CLEAR FORK BRAZOS . TEXAS .

12060105 -- HUBBARD. TEXAS .

ACCOUNTING UNIT 120602 -- MIDDLE BRAZOS-BOSQUE : THE BRAZOS RIVER

BASIN BELOW THE CLEAR FORK BRAZOS

RIVER BASIN TO AND INCLUDING THE

CASTLEMAN CREEK BASIN. TEXAS .

CATALOGING UNITS 12,06020 :1 .-- MIDDLE BRAZOS-PALO PINTO. TEXAS.

12060202.-- MIDDLE BRAZOS-LAKE WHITNEY . TEXAS.

12060203 -- BOSQUE . TEXAS .

12060204 -- NORTH BOSQUE . TEXAS.

SUBREGION 1207 -- LOWER BRAZOS : THE BRAZOS RIVER BASIN BELOW

THE CASTLEMAN CREEK BASIN .

TEXAS .

ACCOUNTING UNIT 120701.

CATALOGING UNITS 1207010]. --- LOWER BRAZOS-LITTLE BRAZOS . TEXAS.

1,2070102 --- YEGUA. TEXAS .

1207010:3 --- NAVASOTA . TEXAS .

12070104 --- LOWER BRAZOS . TEXAS .

ACCOUNTING UNIT 120702 -- LITTLE : THE LITTLE RIVER BASIN. TEXAS .

CATALOGING UNITS 12070201 --- LEON . TEXAS.

1207020'2. -- COWHOUSE . TEXAS .

12070203 --- LAMPASAS . TEXAS .

12070204 °- LITTLE . TEXAS .

1207020!i --- SAN GABRIEL . TEXAS.

SUBREGION 1208 -- UPPER COLORADO : THE COLORADO RIVER BASIN ABOVE AND

INCLUDING THE OAR: CREEK BASIN. ;NEW MEXICO,

TEXAS .

A7 9

-- LOWER BRAZOS : THE BRAZOS RIVER BASIN

BELOW THE CASTLEMAN CREEK

BASIN, EXCLUDING THE LITTLE

RIVER BASIN . TEXAS.
H Y D R 0 1, 0 G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

ACCOUNTING UNIT 120800 -°- UPPER COLORADO . NEW MEXICO, TEXAS.

CATALOGING UNITS 12080(101 --- LOST DRAW . NEW MEXICO, TEXAS.

1208OC102 --- COLORADO HEADWATERS . TEXAS.

1208OC103 -- MONUMENT-SEMINOLE DRAWS .

NEW MEXICO, TEXAS.

1208OC104 -- MUSTANG DRAW . NEW MEXICO, TEXAS.

120800105 -- JOHNSON DRAW . TEXAS .

12080006 --- SULPHUR SPRINGS DRAW . NEW MEXICO,

TEXAS .

12080007 --- BEALS . TEXAS.

12080008 --- UPPER COLORADO . TEXAS.

SUBREGION 1209 --- LOWER COLORADO-SAN BERNARD COASTAL : THE COLORADO

RIVER BASIN BELOW THE OAK CREEK

BASIN ; AND THE' COASTAL DRAINAGE AND

ASSOCIATED WATERS FROM THE BRAZOS RIVER BASIN

BOUNDARY TO THE COLORADO RIVER BASIN BOUNDARY .

TEXAS .

ACCOUNTING UNIT 120901 --- MIDDLE COLORADO-CONCHO : THE COLORADO

RIVER. BASIN BELOW THE OAK

CREEK BASIN TO AND :INCLUDING

THE SAN SABA RIVER BASIN. TEXAS.

CATALOGING UNITS 12090101 -- MIDDLE COLORADO-ELM . TEXAS.

12090102 -- SOUTH CONCHO . TEXAS .

12090103 -- MIDDLE CONCHO . TEXAS .

12090104 -- NORTH CONCHO . TEXAS .

12090105 -- CONCHO . TEXAS .

12090106 -- MIDDLE COLORADO . TEXAS.

12090107 - PECAN BAYOU. TEXAS .

12090108 - JIM NED. TEXAS .

12090109 -- SAN SABA . TEXAS.

12090110 -- BRADY . TEXAS.

ACCOUNTING UNIT 120902 ---

CATALOGING UNITS 12090201 -- BUCHANAN-LYNDON B . JOHNSON LAKES

TEXAS .

12090202 -- NORTH LLANO . TEXAS.

12090203 -- SOUTH LLANO . TEXAS.

12090204 -- LLANO . TEXAS .

12090205 -- AUSTIN-TRAVIS LAKES . TEXAS .

12090206 -- PEDERNALES . TEXAS.

A80

MIDDLE COLORADO-LLANO : THE COLORADO RIVER

BASIN BELOW THE SAN SABA

RIVER BASIN TO AND INCLUDING THE

ONION CREEK BASIN. TEXAS .
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS .AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

ACCOUNTING UNIT 120903 -- LOWER COLORADO : THE COLORADO RIVER BASIN

BELOW THE ONION CREEK

BASIN TO ITS POINT OF DISCHARGE

INTO THE GULF OF MEXICO . TEXAS.

CATALOGING UNITS 12090301 -- LOWER COLORADO-CUMMINS . TEXAS .

12090302 -- LOWER COLORADO . TEXAS .

ACCOUNTING UNIT 120904 -- SAN BERNARD COASTAL: THE COASTAL DRAINAGE

AND ASSOCIATED WATERS FROM THE BRAZOS

RIVER BASIN BOUNDARY TO THE COLORADO

RIVER BASIN BOUNDARY . TEXAS.

CATALOGING UNITS 12090401 --- SAN BERNARD . TEXAS .

12090402 --- EAST MATAGORDA BAY . TEXAS .

SUBREGION 1210 -- CENTRAL TEXAS COASTAL : THE COASTAL DRAINAGE AND

ASSOCIATED 'WATERS FROM THE COLORADO RIVER BASIN

BOUNDARY TO ARANSAS PASS AND THE CORPUS CHRISTI

BAY DRAINAGE BOUNDARY . TEXAS .

ACCOUNTING UNIT 121001 -- LAVACA : THE LAVACA RIVER BASIN. TEXAS.

CATALOGING UNITS 12:100101 --- LAVACA . TEXAS .

12100102 -° NAVIDAD . TEXAS.

ACCOUNTING UNIT 121002 -- GU'ADALUPE : THE GUADALUP:E RIVER BASIN,

EXCLUDING THE SAN ANTONIO RIVER BASIN.

TEXAS .

CATALOGING UNITS 12100201. --- UPPER GUADALUPE . TEXAS.

12100202 --- MIDDLE GUADALUPE . TEXAS.

12100203 --- SAN MARCOS . TEXAS.

12100204 °-- LOWER GUADALUPE . TEXAS .

ACCOUNTING UNIT 121003 -- SAN ANTONIO : THE SAN ANTONIO RIVER BASIN .

TEXAS .

CATALOGING UNITS 121003071--- UPPER SAN ANTONIO. TEXAS.

1210030.? --- MEDINA . TEXAS .

1210030,'3 --- LOWER SAN ANTONIO. TEXAS.

12100304 --- CIBOLO . TEXAS .

ACCOUNTING UNIT 121004 -- CENTRAL TEXAS COASTAL: THE COASTAL

DRAINAGE AND ASSOCIATED WATERS FROM THE

COLORADO RIVER BASIN BOUNDARY TO

ARANSAS PASS AND THE CORPUS CHRISTI BAY

DRAINAGE BOUNDARY, EXCLUDING THE GUADALUPE

A81
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

LAVACA, AND SAN ANTONIO RIVER BASINS .

TEXAS

CATALOGING UNITS 12100401 -- CENTRAL MATAGORDA BAY . TEXAS .

12100402 -- WEST MATAGORDA, BAY. TEXAS .

12100403 -- EAST SAN ANTONIO BAY . TEXAS .

12100404 -- WEST SAN ANTONIO BAY . TEXAS .

12100405 -- ARANSAS BAY . TEXAS.

12100406 -- MISSION. TEXAS .

12100407 --- ARANSAS . TEXAS .

SUBREGION 1211 -- NUECES-SOUTHWESTERN TEXAS COASTAL : THE COASTAL

DRAINAGE AND ASSOCIATED WATERS FROM ARANSAS PASS,

INCLUDING THE CORPUS CHRISTI BAY AND NUECES RIVER

DRAINAGE'S TO THE RIO GRANDE BASIN BOUNDARY .

TEXAS.

ACCOUNTING UNIT 121101 --- NUECES : THE NUECES RIVER BASIN . TEXAS.

CATALOGING UNITS 12110101 ---- NUECES HEADWATERS . TEXAS .

12110102 --- WEST NUECES . TEXAS .

12110103 -° UPPER NUECES . TEXAS .

12110104 -- TURKEY . TEXAS.

12110105 -- MIDDLE NUECES . TEXAS .

12110106 --- UPPER FRIO . TEXAS.

12110107 --- HONDO. TEXAS .

12110108 --- LOWER FRIO . TEXAS.

12110109 -° SAN MIGUEL . TEXAS.

1211013_0 --- ATASCOSA . TEXAS.

1211013_1 --- LOWER NUECES . TEXAS.

ACCOUNTING UNIT 121102 --- SOUTHWESTERN TEXAS COASTAL: THE COASTAL

DRAINAGE AND ASSOCIATED WATERS FROM

ARANSAS PASS, INCLUDING THE CORPUS CHRISTI

BAY DRAINAGE, TO THE RIO GRANDE BASIN

BOUNDARY, EXCLUDING THE NUECES RIVER

BASIN . TEXAS .

CATALOGING UNITS 12110201 -° NORTH CORPUS CHRISTI BAY . TEXAS.

12110:202 --- SOUTH CORPUS CHRISTI BAY . TEXAS.

12110203 -° NORTH LAGUNA MADRE. TEXAS .

12110204 -- SAN FERNANDO .'TEXAS .

12110205 --- BAFFIN BAY . TEXAS.

12110206 --- PALO BLANCO . TEXAS.

12110207 -- CENTRAL LAGUNA MADRE . TEXAS .

12110208 --- SOUTH LAGUNA MADRE. TEXAS.
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESU:IPTIGNS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

REGION 13 RIO GRANDE REGION --- THE DRAINAGE WITHIN THE UNITED STATES OF

(A) THE RIO GRANDE BASIN, AND (B) THE SAN LUIS VALLEY, NORTH

PLAINS, PLAINS OF SAN AGUSTIN, MIMBRES RIVER, ESTANCIA,

JORNADA DEL MUERTO, TULAROSA VALLEY, SALT BASIN, AND OTHER

CLOSED BASINS INCLUDES PARTS OF COLORADO, NEW MEXICO

AND TEXAS.

SUBREGION 1301 -- RIO GRANDE HEADWATERS : THE RIO GRANDE BASIN FROM

ITS HEADWATERS TO THE RIVER'S INTERSECT WITH THE

COLORADO-NEW MEXICO STATE LINE, INCLUDING THE SAN

LUIS VALLEY CLOSED BASIN . COLORADO, NEW MEXICO .

ACCOUNTING UNIT 130100 -- RIO GRANDE HEADWATERS . COLORADO,

NEW MEXICO .

CATALOGING UNITS 13010001. -- RIO GRANDE HEADWATERS . COLORADO .

13010002: -- .LLAMOSA-TRINCHERA . COLORADO,

NEW MEXICO .

13010003 -- SAN LUIS . COLORADO .

13010004 -- SAGUACHE . COLORADO .

13010005 -- CONEJOS. COLORADO, NEW MEXICO .

SUBREGION 1302 -- RIO GRANDE--ELEPHANT BUTTE: THE RIO GRANDE BASIN

FROM THE COLORADO-NEW MEXICO STATE LINE TO AND

INCLUDING ELEPHANT BUTTE RESERVOIR, AND INCLUDING

THE NORTH PLAINS, JORNADA DEL MUERTO, AND PLAINS OF

SAN AGUSTIN CLOSED BASINS . COLORADO, NEW MEXICO .

ACCOUNTING UNIT 130201 -- 'UPPER RIO GRANDE : THE RIO GRANDE BASIN

FROM THE COLORADO-NEW MEXICO STATE LINE

TO AND INCLUDING THE GUAJE CANYON DRAINAGE

BASIN. COLORADO, NEW MEXICO .

CATALOGING UNITS 13020101 -- UPPER RIO GRANDE . COLORADO,

NEW MEXICO .

1302010:? -- RIO CHAMA. COLORADO, NEW MEXICO .

ACCOUNTING UNIT 130202 -- RIO GRANDE-ELEPHANT BUTTE : THE RIO GRANDE

BASIN BELOW THE GUAJE. CANYON DRAINAGE

BASIN TO AND INCLUDING ELEPHANT BUTTE

RESERVOIR, AND INCLUDING THE NORTH PLAINS,

JORNADA DEL MUERTO, AND PLAINS OF SAN

AGUSTIN CLOSED BASINS . NEW MEXICO .

CATALOGING UNITS 130202,0 :1. -- RIO GRANDE-SANTA FE . NEW MEXICO .

130202,02, -- JEMEZ . NEW MEXICO .

130202,0 .3 -- RIO GRANDE-ALBUQUERQUE .

NEW MEXICO .

13020204 -- RIO PUERCO . NEW MEXICO .

A8 3
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

13020205 -- ARROYO CHICO . NEW MEXICO .

130202(16 -- NORTH PLAINS . NEW MEXICO .

13020207 -- RIO SAN JOSE . NEW MEXICO .

13020208 -- PLAINS OF SAN AGUSTIN.

NEW MEXICO .

13020209 -- RIO SALADO . NEW MEXICO .

1302021.0 -- JORNADA DEL MUERTO . NEW MEXICO .

1302021.1 -- ELEPHANT BUTTE RESERVOIR.

NEW MEXICO .

SUBREGION 1303 -- RIO GRANDE-MIMBRES : THE DRAINAGE- WITHIN THE

UNITED STATES OF THE RIO GRANDE , BASIN FROM ELEPHANT

BUTTE RESERVOIR TO THE JUNCTION OF THE MEXICO,

NEW MEXICO, AND TEXAS INTERNATIONAL BOUNDARY, AND

INCLUDING THE JORNADA DRAW, MIMBRES RIVER, AND

OTHER CLOSED BASINS WEST OF THE RIO GRANDE .

NEW MEXICO, TEXAS .

ACCOUNTING UNIT 130301 -- RIO GRANDE-CABALLO : THE DRAINAGE WITHIN

THE UNITED STATES OF THE RIO GRANDE BASIN

FROM ELEPHANT BUTTE RESERVOIR TO THE

.'UNCTION OF THE MEXICO, NEW MEXICO, AND

TEXAS INTERNATIONAL BOUNDARY, AND

INCLUDING THE JORNADA DRAW CLOSED BASIN .

NEW MEXICO, TEXAS .

CATALOGING UNITS 130301,01 -- CABALLO. NEW MEXICO .

13030102 -- EL PASO-LAS CRUCES . NEW MEXICO,

TEXAS .

13030103 -- JORNADA DRAW . NEW MEXICO .

ACCOUNTING UNIT 130302 --- MIMBRIES : THE DRAINAGE WITHIN THE

UNITED STATES OF THE: MIMBRES RIVER AND

OTHER CLOSED BASINS WEST OF THE RIO GRANDE

19EW MEXICO .

CATALOGING UNITS 13030201 -- PLAYAS LAKE . NEW MEXICO .

130302132 -- MIMBRES. NEW MEXICO .

SUBREGION 1304 -- RIO GRANDE-AMISTAD : THE DRAINAGE WITHIN THE

UNITED STATES OF THE RIO GRANDE BASIN FROM THE

JUNCTION OF THE MEXICO, NEW MEXICO, AND TEXAS

INTERNATIONAL I3OUNDARY TO AND INCLUDING AMISTAD

RESERVOIR, BUT EXCLUDING THE PECOS RIVER BASIN

TEXAS .

ACCOUNTING UNIT 130401 --- RIO GRANDE-FORT QUITMAN: THE DRAINAGE

WITHIN THE UNITED STATES OF THE RIO GRANDE .

BASIN FROM THE JUNCTION OF THE MEXICO,

A84
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

NEW MEXICO, AND TEXAS INTERNATIONAL

BOUNDARY TO THE COMPACT POINT NEAR FORT

QUITMAN . TEXAS.

CATALOGING UNIT 13040100 -- RIO GRANDE-FORT QUITMAN. TEXAS.

ACCOUNTING UNIT 130402 -- RIO GRANDE-AMISTAD : THE DRAINAGE

WITHIN THE UNITED STATES OF THE RIO GRANDE

BASIN FROM THE COMPACT POINT NEAR FORT

QUIL'MAN 7'0 AND INCLUDING AMISTAD RESERVOIR

BUT EXCLUDING THE PECOS AND DEVILS RIVER

BASINS . TEXAS.

CATALOGING UNITS 13040203.--- CIBOLO-RED LIGHT. TEXAS .

13040202 --- ALAMITO . TEXAS.

13040203 --- BLACK HILLS-FRESNO . TEXAS .

13040204 --- TERLINGUA. TEXAS.

13040205 --- BIC; BEND . TEXAS .

13040206 --- MARAVILLAS . TEXAS .

1304020) --- SANTIAGO DRAW . TEXAS .

13040208 --- REAGAN-SANDERSON . TEXAS .

13040205) --- SAN FRANCISCO. TEXAS .

13040210 --- LOZIER CANYON . TEXAS .

13040211 --- BIG CANYON . TEXAS .

13040212 -- AMISTAD RESERVOIR. TEXAS .

ACCOUNTING UNIT 130403 -- DEVILS : rHE DEVILS RIVER BASIN . TEXAS .

CATALOGING UNITS 13040301 -- UPPER DEVILS . TEXAS.

13040302 -- LOWER DEVILS . TEXAS .

13040303 -- DRY DEVILS . TEXAS.

SUBREGION 1305 -- RIO GRANDE CLOSED BASINS : THE ESTANCIA, TULAROSA

VALLEY, SALT BASIN AND OTHER CLOSED BASINS LYING

BETWEEN THE RIO GRANDE AND THE PECOS RIVER

BASINS . NEW MEXICO, TEXAS.

ACCOUNTING UNIT 130500 -- RIO GRANDE CLOSED BASINS . NEW MEXICO,

TEXAS .

CATALOGING UNITS 1-11050003. -- WESTERN ESTANCIA . NEW MEXICO .

1_1050001! -- EASTERN ESTANCIA . NEW MEXICO .

13050003 -- TULAROSA VALLEY . NEW MEXICO, TEXAS.

13050004 -- SALT BASIN. NEW MEXICO, TEXAS.

SUBREGION 1306 -- UPPER PECOS: THE PECOS RIVER BASIN TO BUT

EXCLUDING THE DELAWARE RIVER BASIN .

NEW MEXICO, TEXAS.

A85
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

ACCOUNTING UNIT 130600 --- UPPER PECOS . NEW MEXICO, TEXAS .

CATALOGING UNITS 13060001 -- PECOS HEADWATERS . NEW MEXICO .

13060002 -- PINTADA ARROYO . NEW MEXICO .

13060003 -- UPPER PECOS . NEW MEXICO .

13060004 -- TAIBAN . NEW MEXICO .

13060005 -- ARROYO DEL MACHO . NEW MEXICO .

13060006 -- GALLO ARROYO . NEW MEXICO .

13060007 -- UPPER PECOS-LONG ARROYO . NEW MEXICO .

130600, 08 -- RIO HONDO. NEW MEXICO .

13060009 -- RIO FELIX. NEW MEXICO .

13060010--- RIO PENASCO . NEW MEXICO .

13060011 -- UPPER PECOS-BLACK. NEW MEXICO,

TEXAS .

SUBREGION 1307 -- LOWER PEC:OS : THE PECOS RIVER BASIN FROM AND

INCLUDING THE DELAWARE RIVER BASIN TO THE

CONFLUENCE WITH THE RIO GRANDE . NEW MEXICO,

TEXAS.

ACCOUNTING UNIT 130700 -° LOWER: PECOS . NEW MEXICO, TEXAS .

CATALOGING UNITS 13070001 --- LOWER PECOS-RED BLUFF RESERVOIR: .

NEW MEXICO, TEXAS.

13071DO02 --- DELAWARE . NEW MEXICO, TEXAS.

13070003 -- TOYAH. TEXAS.

13070004 -- SALT DRAW . TEXAS.

13070005 --- BARRILLA DRAW . TEXAS .

130700'06 --- COYANOSA-HACKBERRY DRAWS. TEXAS.

13070007 --- LANDRETH-MONUMENT DRAWS. NEW MEXICO,

TEXAS.

13070008 ---- LOWER PECOS. TEXAS .

13070009 --- TUNAS. TEXAS .

13070010 ---- INDEPENDENCE . TEXAS.

13070011 ---- HOWARD DRAW . TEXAS.

SUBREGION 1308 -- RIO GRANDE-FALCON: THE DRAINAGE WITHIN

THE UNITED STATES OF THE RIO GRANDE BASIN FROM

AMISTAD RESERVOIR TO AND INCLUDING FALCON

RESERVOIR. TEXAS.

ACCOUNTING UNIT 130800 ---- RIO GRANDE-FALCON . TEXAS .

CATALOGING UNITS 13080001 --- ELM-SYCAMORE . TEXAS .

13080002 --- SAN AMBROSIA-SANTA ISABEL . TEXAS .

13080003 --- INTERNATIONAL FALCON RESERVOIR .

TEXAS .

SUBREGION 1309 -- LOWER R.IO GRANDE : THE DRAINAGE WITHIN THE

A8 6
H Y D R 0 L 0 G :I C U N I T C O D E S

BOUNDARY DESCRIPTIONS SAND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AI'lD CATALOGING UNITS (CONTINUED)

UNITED STATES OF THE RIO GRANDE BASIN FROM FALCON

RESERVOIR TO THE GULF OF MEXICO . TEXAS.

ACCOUNTING UNIT 130900 -- LOWER RIO GRANDE . TEXAS .

CATALOGING UNITS 13090001.-- LOS OLMOS . TEXAS .

13090002 --- LOWER RIO GRANDE . TEXAS .

REGION 14 UPPER COLORADO REGION --- THE DRAINAGE OF : (A) THE COLORADO

RIVER BASIN ABOVE THE LEE FERRY COMPACT POINT WHICH IS

ONE MILE BELOW THE MOUTH OF THE PARIA RIVER; AND (B) THE

GREAT DIVIDE CLOSED BASIN. INCLUDES PARTS OF ARIZONA,

COLORADO, NEW MEXICO, UTAH,, AND WYOMING.

SUBREGION 1401 -- COLORADO HEADWATERS : THE COLORADO RIVER BASIN TO

BUT EXCLUDING THE BITTER CREEK BASIN, AND

EXCLUDING THE GUNNISON RIVER BASIN. COLORADO, UTAH.

ACCOUNTING UNIT 14010'0 -- COLORADO HEADWATERS : COLORADO, UTAH .

CATALOGING UNITS 14010001--- COLORADO HEADWATERS . COLORADO .

14010002 --- BLUE . COLORADO .

14010003 -- EAGLE . COLORADO .

1.4010004 -- ROARING FORK . COLORADO .

1.4010005 --- COLORADO HEADWATERS-PLATEAU .

UTAH .

1.4010006 °- PARACHUTE-ROAN . COLORADO .

SUBREGION 1402 -- GUNNISON : TIRE GUNNISON RIVER BASIN. COLORADO .

ACCOUNTING UNIT 140200 -- GUNNISON . COLORADO .

CATALOGING UNITS 1.4020001 -- EAST-TAYLOR . COLORADO .

1.4020002 -- UPPER GUNNISON . COLORADO .

1.4020003 -- TOMICHI . COLORADO .

1.4020004 -- NORTH FORK GUNNI:SON . COLORADO .

1.4020005 -- LOWER GUNNISON . COLORADO .

1 .4020006 -- UNCOMPAHGRE . COLORADO .

SUBREGION 1403 -- UPPER COLORADO-DOLORES : THE COLORADO RIVER BASIN

FROM AND INCLUDING THE BITTER CREEK BASIN

TO THE CONFLUENCE WITH THE GREEN RIVER BASIN.

COLORADO, UTAH .

ACCOUNTING UNIT 140300 -- UPPER COLORADO-DOLORES . COLORADO, UTAH .

CATALOGING UNITS 14030001 -- WESTWATER CANYON . COLORADO, UTAH .

A87
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITE; AND CATALOGING UNITS (CONTINUED)

14030002 --- UPPER DOLORES. COLORADO, UTAH .

14030003 -- SAN MIGUEL . COLORADO .

14030004 --- LOWER DOLORES . COLORADO, UTAH .

14030005 -- UPPER COLORADO-KANE SPRINGS .

COLORADO, UTAH .

SUBREGION 1404 --- GREAT DIVIDE -- UPPER GREEN: THE GREEN RIVER BASIN

ABOVE THE: CONFLUENCE WITH THE YAMPA RIVER BASIN;

AND THE GREAT DIVIDE CLOSED BASIN. UTAH, WYOMING.

ACCOUNTING UNIT 140401 --- UPPER GREEN : THE GREEN. RIVER BASIN ABOVE

i'HE CONFLUENCE: WITH THE YAMPA RIVER BASIN. UTAH,

WYOMING.

CATALOGING UNITS 140401.01 -- UPPER GREEN. WYOMING.

140401.02 -- NEW FORK . WYOMING.

140401.03 -- UPPER GREEN-SLATE . WYOMING.

140401.04 -- BIG SANDY . WYOMING.

140401.05 -- BITTER . WYOMING.

140401.06 -- UPPER GREEN-FLAMING GORGE RESERVOIR.

COLORADO . UTAH, WYOMING.

140401.07 -- BLACKS FORK . UTAH, WYOMING.

140401.08 -- MUDDY . UTAH, WYOMING.

140401.09 -- VERMILION. COLORADO, WYOMING .

ACCOUNTING UNIT 140402 -- GREAT DIVIDE CLOSED BASIN: THE

GREAT DIVIDE CLOSED BASIN. WYOMING .

CATALOGING UNIT 140402:00 --- GREAT DIVIDE CLOSED BASIN . WYOMING.

SUBREGION 1405 --- WHITE-YAMPA : THE WHITE AND YAMPA RIVER BASINS .

COLORADO, UTAH, WYOMING.

ACCOUNTING UNIT 140500 --- WHITE - YAMPA. COLORADO, UTAH, WYOMING,.

CATALOGING UNITS 140500011 -- UPPER YAMPA. COLORADO .

14050002 -- LOWER YAMPA. COLORADO .

140506013 -- LITTLE SNAKE. COLORADO, WYOMING.

14050004 -- MUDDY . WYOMING.

14050005 -- UPPER WHITE . COLORADO .

14050006 -- PICEANCE-YELLOW . COLORADO .

140500017 -- LOWER WHITE. COLORADO, UTAH .

SUBREGION 1406 --- LOWER GREEN : THE GREEN RIVER BASIN BELOW THE

CONFLUENCE WITH THE YAMPA RIVER BASIN,BUT EXCLUDING

THE YAMPA AND WHITE RIVER BASINS . COLORADO, UTAH .

ACCOUNTING UNIT 140600 --- LOWER: GREEN . COLORADO, UTAH .

A88
H Y D R C L 0 (.1 I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS JWD CATALOGING UNITS (CONTINUED)

CATALOGING UNITS 1406000:1. -- LOWER GREEN-DIAMOND. COLORADO, UTAH .

14060002 -- ASHLEY-BRUSH . UTAH .

14060003 -- DUCHESNE . UTAH .

14060004 -- STRAWBERRY . UTAH .

140600105 °- LOWER GREEN-DESOLATION CANYON . UTAH .

14060006 -- WILLOW . UTAH .

1406000'7 -- PRICE. UTAH .

14060008 -- LOWER GREEN . UTAH .

1406000!9 -- SAN' RAFAEL . UTAH .

SUBREGION 1407 -- UPPER COLORADO-DIRTY DEVIL : THE COLORADO RIVER

BASIN BELOW THE CONFLUENCE WITH THE GREEN RIVER

BASIN TO THE LEE FERRY COMPACT POINT, BUT EXCLUDING

THE SAN JUAN RIVER: BASIN. ARIZONA, UTAH .

ACCOUNTING UNIT 140700 -- UPPER COLORADO-DIRTY DEVIL . ARIZONA, UTAH .

CATALOGING UNITS 14070001 --- UPPER LAKE POWELL . UTAH .

14070002 --- MUDDY . UTAH .

1407000:3 --- FREMONT. UTAH .

14070004 --- DIRTY DEVIL . UTAH .

14070005 ---- ESC:ALANTE . UTAH .

140700015 ---- LOWER LAKE POWELL . ARIZONA, UTAH .

14070007 ---- PARIA. ARIZONA, UTAH .

SUBREGION 1408 -- SAN JUAN :

THE

SAN JUAN RIVER BASIN. ARIZONA,

COLORADO,, NEW MEXICO, UTAH .

ACCOUNTING UNIT 14080]. -- UPPER SAN JUAN : THE SAN JUAN RIVER BASIN

TO AND INCLUDING THE MANGOS RIVER BASIN .

ARIZONA, COLORADO, NEW MEXICO .

CATALOGING UNITS 14O80101 ---- UPPER SAN JUAN . COLORADO,

NEW MEXICO .

14080102 --- PIEDRA . COLORADO .

14080103 --° BLANCO CANYON . NEW MEXICO .

14080104 ---- ANIMAS . COLORADO, NEW MEXICO .

14080105 ---- MIDDLE SAN JUAN . ARIZONA, COLORADO,,

NEW MEXICO .

14080106 -° CHACO. ARIZONA, NEW MEXICO .

14080107 -° MANGOS . COLORADO, NEW MEXICO .

ACCOUNTING UNIT 140802 -- LOWER SAN JUAN : THE SAN JUAN RIVER BASIN

BELOW THE MANGOS RIVER BASIN TO

THE CONFLUENCE WITH THE COLORADO RIVER.

ARIZONA, COLORADO, NEW MEXICO, UTAH .

CATALOGING UNITS 14080;201 --- LOWER SAN JUAN-FOUR CORNERS .

ARIZONA, COLORADO, NEW MEXICO, UTAJ3 .

A8 9
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

14080202 -- MCELMO . COLORADO, UTAH .

14080203 -- MONTEZUMA. COLORADO, UTAH .

14080204 -- CHINLE . ARIZONA, NEW MEXICO, UTAH .

14080205 -- LOWER SAN JUAN . ARIZONA, UTAH .

REGION 15 LOWER COLORADO REGION--THE DRAINAGE WITHIN THE UNITED STATES

OFD (A) THE COLORADO RIVER BASIN BELOW THE LEE FERRY COMPACT

POINT WHICH IS ONE MILE BELOW THE MOUTH OF THE PARIA RIVER;

(B) STREAMS THAT ORIGINATE WITHIN THE UNITED STATES AND

ULTIMATELY DISCHARGE INTO THE GULF OF CALIFORNIA ; AND

(C) THE: ANIMAS VALLEY, WILLCOX PLAYA, AND OTHER SMALLER

CLOSED BASINS . INCLUDES PARTS OF ARIZONA, CALIFORNIA,

NEVADA, NEW MEXICO, AND UTAH .

SUBREGION 1.501 -- LOWER COLORADO-LAKE MEAD : THE COLORADO RIVER BASIN

FROM THE :LEE ;FERRY COMPACT POINT TO HOOVER DAM,,

BUT EXCLUDING THE LITTLE COLORADO RIVER BASIN.

ARIZONA, NEVADA, UTAH .

ACCOUNTING UNIT 1.50100 --- :LOWER COLORADO-LAKE MEAD : ARIZONA,

NEVADA, UTAH .

CATALOGING UNITS 150100101 -- LOWER COLORADO-MARBLE CANYON .

ARIZONA.

1501.00,02 -- GRAND CANYON ARIZONA.

150100,03 -- KANAB. ARIZONA, UTAH .

1501.0004 -- HAVASU CANYON . ARIZONA.

1501.0005 - LAKE MEAD . ARIZONA, NEVADA .

15010006 - GRAND WASH . ARIZONA, NEVADA .

150100,07 - HUALAPAI WASH . ARIZONA.

1501.0008 - UPPER VIRGIN UTAH .

15010009 - FORT PIERCE WASH . ARIZONA, UTAH .

150100.10 -- LOWER VIRGIN . ARIZONA, NEVADA, UTAH .

1501,0011 -- WHITE . NEVADA .

150100.12 -- MUDDY . NEVADA .

15010013 -- MEADOW VALLEY WASH . NEVADA, UTAH .

15010014 -- DETRITAL WASH . ARIZONA.

1501.0015 -- LAS VEGAS WASH . NEVADA .

SUBREGION 1.502 -- :LITTLE COLORADO : THE LITTLE COLORADO RIVER BASIN.

ARIZONA, 19EW MEXICO .

ACCOUNTING UNIT 1'.50200 -- LITTLE COLORADO . ARIZONA, NEW MEXICO .

CATALOGING UNITS 15020001 -- LITTLE COLORADO HEADWATERS . ARIZONA,

NEW MEXICO .

1502,0002 -- UPPER LITTLE COLORADO . ARIZONA,

A9 0
HYDROLOGIC UNIT CODES

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS XND CATALOGING UNITS (CONTINUED)

NEW MEXICO .

1`.1020003 ---- CARRI'ZO WASH . ARIZONA, NEW MEXICO .

1.`1020004 ---- ZUNI . ARIZONA, NEW MEXICO .

15020005 ---- SILVER . ARIZONA.

150200016 --- UPPER PUERCO . ARIZONA, NEW MEXICO .

1.5020007 ---- LOWER PUERCO . ARIZONA.

1`.1020008 --° MIDDLE LITTLE COLORADO . ARIZONA.

15020009 ---- LEROUX WASH . ARIZONA.

15020010 ---- CHEVELON CANYON . ARIZONA .

15020011 ---- COTTONWOOD WASH . ARIZONA.

15020012 ---- CORN-ORAIBI . ARIZONA.

15020013 ---- POLACCA WASH . ARIZONA.

15020014 -- JADITO WASH . ARIZONA .

15020015 ---- CANYON DIABLO . ARIZONA.

15020016 ---- LOWER LITTLE COLORADO . ARIZONA.

15020017 --- DINNEBITO WASH . ARIZONA.

1502001.8 --- MO3NKOPI WASH . ARIZONA .

SUBREGION 1503 -- LOWER COLORADO : THE COLORADO RIVER BASIN WITHIN

THE UNITED STATES BELOW HOOVER DAM, EXCLUDING THE

GILA RIVER BASIN . ARIZONA, CALIFORNIA, NEVADA .

ACCOUNTING UNIT 150301 -- LOWER COLORADO : THE COLORADO RIVER BASIN

WITHIN THE UNITED STATES BELOW HOOVER DAM,

EXCLUDING THE GILA AND BILL WILLIAMS

RIVER BASINS . ARIZONA, CALIFORNIA,

NEVADA .

CATALOGING UNITS 15030101.-- HAVASU-MOHAVE LAKES. ARIZONA,

CALIFORNIA, NEVADA .

15030102 -- PIUTE WASH . CALIFORNIA, NEVADA .

15030103 -- SACRAMENTO WASH . ARIZONA.

15030104 -- IMPERIAL RESERVOIR. ARIZONA,

CALIFORNIA .

15030105 -- SOUSE. WASH . ARIZONA.

15030106 -- TYSON WASH . ARIZONA

15030107 -- LOWER COLORADO . ARIZONA, CALIFORNIA .

15030108 -- YUMA DESERT . ARIZONA .

ACCOUNTING UNIT 150302 -- BILL WILLIAMS : THE BILL WILLIAMS RIVER

BASIN. ARIZONA.

CATALOGING UNITS 1.5030201 -- BIG SANDY. ARIZONA.

1.5030202 -- BURRO . ARIZONA.

1.5030203 -- SANTA MARIA. ARIZONA.

1.5030204 -- BILL WILLIAMS . ARIZONA.

SUBREGION 1504 -- UPPER GILA : THE GILA RIVER BASIN ABOVE COOLIDGE

DAM, INCLUDING THE ANIMAS VALLEY CLOSED BASIN.

A9 1
H Y D R O L O G I C U N I T C O D E S

ARIZONA, NEW MEXICO .

ACCOUNTING UNIT 150400 --- UPPER GILA . ARIZONA, NEW MEXICO .

CATALOGING UNIT 15050100 --- MIDDLE GILA . ARIZONA .

CATALOGING UNITS 15050201 --- WILLCOX PLAYA. ARIZONA.

15050202 --- UPPER SAN PEDRO. ARIZONA.

15050203 --- LOWER SAN PEDRO. ARIZONA.

CATALOGING UNITS 15050:301 --- UPPER SANTA CRUZ . ARIZONA .

15050302 --- RILLITO . ARIZONA .

15050303 --- LOWER'SANTA CRUZ . ARIZONA.

1.5050304 --- BRAWLEY WASH . ARIZONA .

15050305 --- AGUIRRE VALLEY . ARIZONA.

15050:306 --- SANTA ROSA WASH . ARIZONA.

SUBREGION 1506 -- SALT : THE SALT RIVER BASIN . ARIZONA .

A9 2

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

CATALOGING UNITS- 15040001 -° UPPER GILA . NEW MEXICO .

15040002 --- UPPER GILA-MANGAS . ARIZONA,

NEW MEXICO .

15040003 --- ANIMAS VALLEY . ARIZONA, NEW MEXICO .

15040004 --- SAN FRANCISCO . ARIZONA, NEW MEXICO .

15040005 --- UPPER GILA-SAN CARLOS RESERVOIR.

ARIZONA.

150 40006 --- SAN SIMON . ARIZONA, NEW MEXICO .

150 40007 --- SAN CARLOS . ARIZONA.

SUBREGION 1.505 -- MIDDLE GILA : THE GILA RIVER BASIN WITHIN

THE UNITED STATES FROM COOLIDGE DAM TO THE

CONFLUENCE WITH THE SALT RIVER BASIN, INCLUDING

THE WILLCOX CLOSED BASIN. ARIZONA.

ACCOUNTING UNIT 1`.50501 -- MIDDLE GILA: THE GILA RIVER BASIN

FROM COOLIDGE DAM TO THE CONFLUENCE

WITH THE SALT RIVER BASIN, EXCLUDING THE

SANTA CRUZ AND SAN PEDRO RIVER BASINS AND

THE WILLCOX CLOSED BASIN. ARIZONA.

ACCOUNTING UNIT 1.50502 -- SAN PEDRO-WILLCOX : THE SAN PEDRO RIVER.

BASIN WITHIN THE UNITED STATES AND THE

WILLC:OX CLOSED BASIN. ARIZONA.

ACCOUNTING UNIT 150503 -- SANTA CRUZ : THE SANTA CRUZ RIVER BASIN

WITHIN THE UNITED STATES . ARIZONA.

ACCOUNTING UNIT 150601 - SALT :, THE SALT RIVER BASIN, EXCLUDING THE,

VERDE RIVER BASIN. ARIZONA.
fI Y D R 0 L 0 G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS- AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

CATALOGING UNITS 15060101 -- BLACK. ARIZONA.

15060102 -- WHITE. ARIZONA.

15060103 -- UPPER SALT . ARIZONA.

150601044 -- CARRIZO . ARIZONA.

15060105 -- TO:NTO . ARIZONA .

15060106 -- LOWER SALT . ARIZONA.

ACCOUNTING UNIT 150602 -- VERDE: THE VERDE RIVER BASIN . ARIZONA.

CATALOGING UNITS

15060203 -- LOWER VERDE. ARIZONA.

SUBREGION 1507 -- LOWER GILA : THE GILA RIVER BASIN BELOW THE

CONFLUENCE WITH THE SALT RIVER BASIN TO THE

CONFLUENCE, WITH THE COLORADO RIVER. ARIZONA.

ACCOUNTING UNIT 150701 -- LOWER GILA-AGUA FRIA : THE GILA RIVER BASIN

BELOW THE CONFLUENCE WITH THE SALT RIVER

BASIN TO PAINTED ROCK DAM. ARIZONA.

CATALOGING UNITS 15070101 -- LOWER GILA-PAINTED ROCK RESERVOIR.

ARIZONA.

15070102 -- AGUA FRIA . ARIZONA.

15070103 -- HASSAYAMPA . ARIZONA.

15070104 -- CENTENNIAL WASH . ARIZONA .

ACCOUNTING UNIT 150702 -- LOWER GILA : THE GILA RIVER BASIN

BELOW PAINTED ROCK DAM. ARIZONA.

CATALOGING UNITS 15070201 -- LOWER GILA . ARIZONA.

150702()2 -- TENMILE WASH . ARIZONA .

15070203 -- SAN CRISTOBAL WASH . ARIZONA.

SUBREGION 1508 -- 'SONORA: THE DRAINAGE THAT ORIGINATES WITHIN THE

UNITED STATES EAST OF THE COLORADO RIVER BASIN AND

ULTIMATELY DISCHARGES INTO THE GULF OF CALIFORNIA .

ARIZONA, NEW MEXICO .

ACCOUNTING UNIT 150801 -- RIO SONOYTA: THE DRAINAGE WITHIN THE

UNITED STATES OF THE RIO SONOYTA BASIN.

CATALOGING UNITS

A93

15060201 -- BIG CHINO-WILLIAMSON VALLEY .

ARIZONA.

15060202 -- UPPER VERDE. ARIZONA.

ARIZONA.

15080101 -- SAN SIMON WASH . ARIZONA.

15080102 -- RIO SONOYTA. ARIZONA.

15080103 -- TULE DESERT . ARIZONA.
H Y ID R 0 L 10 G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

ACCOUNTING UNIT 1!50802 -- RIO DE LA CONCEPCION : THE DRAINAGE WITHIN

THE UNITED STATES OF THE RIO DE LA

CONCEPCION BASIN . ARIZONA.

CATALOGING UNIT 150 80200 -- RIO DE LA CONCEPCION . ARIZONA.

ACCOUNTING UNIT 1!50803 -- RIO DE BAVISPE : THE DRAINAGE WITHIN THE

UNITED STATES OF THE RIO DE BAVISPE

BASIN . ARIZONA, NEW MEXICO .

CATALOGING UNITS 15080301 -° WHITEWATER DRAW . ARIZONA.

15080302 --- SAN BERNARDINO VALLEY . ARIZONA,

NEW MEXICO .

15080303 --- CLOVERDALE . NEW MEXICO .

REGION 16 GREAT BASIN REGION --- THE DRAINAGE OF THE GREAT BASIN THAT

DISCHARGES INTO 'THIS STA'.PES OF UTAH ANI) NEVADA . INCLUDES

PARTS OF CALIFORNIA, IDAHO, NEVADA, OREGON, UTAH, AND

WYOMING.

SUBREGION 1601 -- 13EAR : THE BEAR RIVER BASIN. IDAHO, UTAH, WYOMING.

ACCOUNTING UNIT 160101 -- UPPER BEAR : THE BEAR RIVER BASIN ABOVE

STEWART DAM. IDAHO, UTAH, WYOMING.

CATALOGING UNITS 16010101 --- UPPER BEAR . UTAH, WYOMING .

16010102 --- CENTRAL BEAR . IDAHO, UTAH, WYOMING .

ACCOUNTING UNIT 160102 -- LOWER BEAR : THE BEAR RIVER BASIN BELOW

STEWART DAM. IDAHO, UTAH .

CATALOGING UNITS 16010201 --- BEAR LAKE . IDAHO, UTAH .

16010202 --- MIDDLE BEAR . IDAHO, UTAH .

16010203 --- LITTLE BEAR-LOGAN . IDAHO, UTAH .

16010204 --- LOWER BEAR-MALAD . IDAHO, UTAH .

SUBREGION 1602 -- GREAT SALT LAF.E : THE GREAT SALT LAKE BASIN,

EXCLUDING THE BEAR RIVER BASIN.

IDAHO, NEVADA UTAH, WYOMING.

ACCOUNTING UNIT 160201 -- WEBER: THE WEBER RIVER BASIN . UTAH,

WYOMING.

CATALOGING UNITS 160'20101 --- UPPER WEBER. UTAH, WYOMING .

16020102 --- LOWER WEBER . UTAH .

ACCOUNTING UNIT 160202 -- JORDAN : THE JORDAN RIVER BASIN. UTAH .

A94
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

CATALOGING UNITS

A95

ACCOUNTING UNIT 160

CATALOGING UNITS 16020301 -- HAIMLIN-SNAKE VALLEYS . NEVADA, UTAH .

16020302 -- PINE VALLEY . UTAH .

16020303 -- TULE VALLEY . UTAH .

16020304 -- RUSH-TOOELE VALLEYS. UTAH .

16020305 -- SKULL VALLEY . UTAH .

16020306 -- SOUTHERN GREAT SALT LAKE DESERT .

NEVADA, UTAH .

16020307 -- PILOT-THOUSAND SPRINGS, NEVADA,

UTAH .

16020308 -- NORTHERN GREAT SALT LAKE DESERT .

NEVADA, UTAH .

16020309 -- CURLEW VALLEY . IDAHO, UTAH .

1602031.0 -- GREAT SALT LAKE . UTAH .

SUBREGION 1603 -- ESCALANTE DESERT-SEVIER LAKE : THE ESCALANTE DESERT

AND THE SEVIER LAKE CLOSED BASINS . NEVADA, UTAH .

ACCOUNTING UNIT 160300 -- ESCALANTE DESERT-SEVIER LAKE : NEVADA,

UTAH .

CATALOGING UNITS 160300(:11 -- UPPER SEVIER . UTAH .

160300(:12 -- EAST FORK SEVIER . UTAH .

16030003 -- MIDDLE SEVIER . UTAH .

160300(:)4 -- SAN PITCH . UTAH .

16030005 -- LOWER SEVIER . UTAH .

160300(:)6 -- ESCALANTE DESERT . NEVADA, UTAH .

160300(:17 -- BEAVER BOTTOMS-UPPER BEAVER . UTAH .

16030008 -- LOWER BEAVER . UTAH .

160300(:19 -- SEVIER LAKE . UTAH .

SUBREGION 1604 -- BLACK ROCK DESERT-HUMBOLDT: THE HUMBOLDT RIVER

BASIN, THE BLACK ROCK DESERT, AND OTHER CLOSED

BASINS THAT DISCHARGE INTO NORTHWESTERN

NEVADA . CALIFORNIA, NEVADA, OREGON .

ACCOUNTING UNIT 160401 -- HUMBOLDT : THE HUMBOLDT RIVER BASIN .

NEVADA .

CATALOGING UNITS 1.6040101 -- UPPER HUMBOLDT . NEVADA .

16020201 -- UTAH LAKE . UTAH .

16020202 -- SPANISH FORK .

16020203 -- PROVO. UTAH .

16020204 -- JORDAN . UTAH .

UTAH .

03 -- GREAT SALT LAKE : THE GREAT SALT LAKE

BASIN, EXCLUDING THE BEAR, WEBER, AND

JORDAN RIVER BASINS . IDAHO, NEVADA,

UTAH .
H Y D R O L O G I C: U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

ACCOUNTING UNIT 160402 --- :BLACK ROCK DESERT : THE BLACK ROCK DESERT

AND OTHER CLOSED BASINS THAT DISCHARGE

INTO NORTHWESTERN NEVADA .

CALIFORNIA, NEVADA, OREGON .

CATALOGING UNITS 1604,0201 -- UPPER QUINN . NEVADA, OREGON .

16040202 -- LOWER QUINN. NEVADA .

16040203 -- SMOKE CREEK DESERT . CALIFORNIA,

NEVADA .

16040204 -- MASSACRE LAKE,. CALIFORNIA, NEVADA,

OREGON .

16041:0205 -- THOUSAND-VIRGIN . NEVADA, OREGON .

SUBREGION 1605 -- CENTRAL LAHONTAN : THE CENTRAL LAHONTAN BASIN

CONSISTING OF THE CARSON, TRUCKEE, AND WALKER RIVER

BASINS, CALIFORNIA, NEVADA .

ACCOUNTING UNIT 160501 --- TRUCKEE : THE TRUCKEE RIVER BASIN.

CALIFORNIA, NEVADA .

CATALOGING UNITS 160!:101.01 -- LAKE TAHOE. CALIFORNIA, NEVADA.

160!;101.02 -- TRUCKEE . CALIFORNIA, NEVADA .

160501.03 -- PYRAMID-WINNEMUCCA LAKES. NEVADA

160!`.101.04 -- GRANITE SPRINGS VALLEY . NEVADA .

ACCOUNTING UNIT 16'0502 °-- CARSON : THE CARSON RIVER BASIN.

CALIFORNIA, NEVADA .

CATALOGING UNITS 16050201 -- UPPER CARSON . CALIFORNIA, NEVADA .

16050202 -- MIDDLE CARSON . NEVADA .

16050203 -- CARSON DESERT . NEVADA .

ACCOUNTING UNIT 160503 .-- WALKER : THE'WALKER RIVER BASIN .

CALIFORNIA, NEVADA .

CATALOGING UNITS 16050301 --- EAST WALKER . CALIFORNIA, NEVADA.

16050:302 --- WEST WALKER . CALIFORNIA, NEVADA.

16050:303 --- WALKER. NEVADA.

16050:304 --- WALKER LAKE . NEVADA .

A96

16040102 -- NORTH FORK HUMBOLDT . NEVADA.

16040103 -- SOUTH FORK HUMBOLDT . NEVADA .

16040104 -- PINE . NEVADA .

16040105 -- MIDDLE HUMBOLDT . NEVADA .

16040106 -- ROCK . NEVADA .

1604010'1 -- REESE . NEVADA .

16040106 -- LOWER HUMBOLDT . NEVADA .

16040109 -- LITTLE HUMBOLDT . NEVADA .
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

SUBREGION 1606 -- CENTRAL NEVADA DESERT BASINS : THE CLOSED DESERT

BASINS THAT DISCHARGE INTO SOUTH CENTRAL NEVADA .

CALIFORNIA, NEVADA .

ACCOUNTING UNIT 160600 -- CENTRAL NEVADA DESERT BASINS : CALIFORNIA,

NEVADA .

CATALOGING UNITS 16060001 -- DIXIE VALLEY . NEVADA .

16060002 -- GABBS VALLEY . NEVADA .

16060003 -- SOUTHERN BIG SMOKY VALLEY . NEVADA .

16060004 -- NORTHERN BIG SMOKY VALLEY . NEVADA .

16060005 -- DIAMOND-MONITOR VALLEYS . NEVADA

16060006 -- LITTLE SMOKY-NEWARK VALLEYS. NEVADA .

16060007 -- LONG-RUBY VALLEYS . NEVADA .

16060008 -- SPRING-STEPTOE VALLEYS . NEVADA .

16060009 -- DRY LAKE VALLEY . NEVADA .

16060010 -- FISH LAKE-SODA SPRING VALLEYS .

CALIFORNIA, NEVADA .

16060011 -- RALSTON-STONE CABIN VALLEYS. NEVADA .

16060012 -- HOT CREEK-RAILROAD VALLEYS. NEVADA .

16060013 -- CACTUS-SARCOBATUS FLATS . NEVADA .

16060014 -- SAND SPRING-TIKAB00 VALLEYS. NEVADA .

16060015 -- IVANPAH-PAHRUMP VALLEYS . CALIFORNIA,

NEVADA .

REGION 17 PACIFIC NORTHWEST REGION -- THE DRAINAGE WITHIN THE UNITED

STATES THAT ULTIMATELY DISCHARGES INTO : (A) THE STRAITS OF

GEORGIA AND OF JUAN DE FUCA, AND (B) THE PACIFIC OCEAN

WITHIN THE STATES OF OREGON AND WASHINGTON ; AND THAT PART

OF THE GREAT BASIN WHOSE DISCHARGE IS INTO THE STATE OF

OREGON . INCLUDES ALL OF WASHINGTON AND PARTS OF CALIFORNIA,

IDAHO, MONTANA, NEVADA, OREGON, UTAH, AND WYOMING.

SUBREGION 1701 -- KOOTENAI--PEND OREILLE-SPOKANE : THE KOOTENAI, PEND

OREILLE, AND SPOKANE RIVER BASINS WITHIN THE UNITED

STATES . IDAHO, MONTANA, AND WASHINGTON .

ACCOUNTING UNIT 170101 -- KOOTENAI : THE KOOTENAI RIVER BASIN WITHIN

THE UNITED STATES . IDAHO, MONTANA.

CATALOGING UNITS 170101.01 -- UPPER KOOTENAI . IDAHO, MONTANA.

170101.02 -- FISHER . MONTANA.

170101.03 -- YAAK . MONTANA.

170101.04 -- LOWER KOOTENAI . IDAHO, MONTANA.

170101.05 -- MOYIE. IDAHO, MONTANA.

ACCOUNTING UNIT 170102 -- PEND OREILLE: THE PEND OREILLE RIVER BASIN

A97
H Y D R O L O G I C' U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

WITHIN THE UNITED STATES . IDAHO, MONTANA,

AND WASHINGTON .

CATALOGING UNITS 17010201.-- UPPER CLARK FORK . MONTANA.

17010202 -- FLINT-ROCK . MONTANA.

17010203 -- BLACKFOOT. MONTANA.

17010204 -- MIDDLE CLARK FORK . MONTANA.

17010205 -- BITTERROOT . MONTANA.

17010206 -- NORTH FORK FLATHEAD . MONTANA.

17010207 -- MIDDLE FORK FLATHEAD . MONTANA.

17010208 -- FLATHEAD LAKE . MONTANA.

17010209 -- SOUTH FORK FLATHEAD . MONTANA.

170102].0 -- STILLWATER . MONTANA.

1701021.1. -- SWAN . MONTANA.

1701027.2 -- LOWER FLATHEAD . MONTANA.

170102].3 -- LOWER CLARK FORK . IDAHO, MONTANA.

1701023.4 -- PEND OREILLE LAKE . IDAHO, WASHINGTON

1701023.5 -- PRIEST . IDAHO, WASHINGTON .

1701023.6 -- PEND OREILLE. IDAHO, WASHINGTON .

ACCOUNTING UNIT 170103 -- SPOKANE : THE SPOKANE RIVER BASIN. IDAHO,

WASHINGTON .

CATALOGING UNITS 17010301.-- UPPER COEUR D'ALENE. IDAHO

17010302 -- SOUTH FORK COEUR D'ALENE. IDAHO .

17010303 -- COEUR D'ALENE LAKE . IDAHO,

WASHINGTON .

17010304 --- ST . JOE . IDAHO .

17010305 -- UPPER SPOKANE. IDAHO, WASHINGTON .

17010306 -- HANGMAN . IDAHO, WASHINGTON .

17010307 --- LOWER SPOKANE . WASHINGTON .

1701030& -- LITTLE SPOKANE. IDAHO, WASHINGTON .

SUBREGION 1702 -- UPPER COLUMBIA : THE COLUMBIA RIVER BASIN WITHIN 'THE

THE UNITED STATES ABOVE THE CONFLUENCE WITH THE

SNAKE RIVER BASIN, EXCLUDING THE YAKIMA RIVER

BASIN . WASHINGTON .

ACCOUNTING UNIT 170200 -- UPPER COLUMBIA . WASHINGTON .

CATALOGING UNITS 17020001.-- FRANKLIN D. ROOSEVELT LAKE .

WASHINGTON .

17020002 -- KETTLE . WASHINGTON .

17020003 -- COLVILLE . WASHINGTON .

17020004 -- SANPOIL . WASHINGTON .

17020005 -- CHIEF JOSEPH . WASHINGTON .

17020006 -- OKANOGAN . WASHINGTON .

17020007 -> SIMILKAMEEN . WASHINGTON .

17020008 -- METHOW . WASHINGTON .

A9 8
HYDROLOGIC

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING 'UNITS AIM CATALOGING UNITS (CONTINUED)

17020009 ---

17020010 ---

17020011 ---

17020012 --

17020013 ---

17020014 ---

17020015 ---

17020016 --

U N I T C O D E S

LAKE CHELAN . WASHINGTON .

UPPER COLUMBIA-ENTIAT . WASHINGTON .

WENATCHEE. WASHINGTON .

MOSES COULEE . WASHINGTON .

UPPER CRAB . WASHINGTON .

BANKS LAKE . WASHINGTON .

LOWER CRAB . WASHINGTON .

UPPER COLUMBIA-PRIEST RAPIDS .

WASHINGTON .

SUBREGION 1703 -- YAKIMA . THE YAKI14A RIVER BASIN. WASHINGTON .

ACCOUNTING UNIT 1703Ci0 -- YAKIMA. WASHINGTON .

CATALOGING UNITS 3.7030001 -- UPPER YAKIMA . WASHINGTON .

3.7030002 -- NACHES . WASHINGTON .

3 .7030003 -- LOWER YAKIMA, WASHINGTON .

SUBREGION 1704 -- UPPER SNAKE : THE SNAKE RIVER BASIN TO AND

INCLUDING THE CLOVER CREEK BASIN .

IDAHO, NEVADA, UTAH, WYOMING.

ACCOUNTING UNIT 170401 -- SNAKE: HEADWATERS : THE SNAKE RIVER BASIN

ABOVE KELLY MOUNTAIN . IDAHO, WYOMING.

CATALOGING UNITS

CATALOGING UNITS

17040101 --- SNAKE HEADWATERS . WYOMING.

17040102 --- GROS VENTRE . WYOMING.

17040103 --- GREYS-HOBOCK . WYOMING.

17040104 --- PALISADES. IDAHO, WYOMING.

17040105 --- SALT . IDAHO, WYOMING.

ACCOUNTING UNIT 170402 -- UPPER SNAKE : THE SNAKE RIVER BASIN FROM

KELLY MOUNTAIN TO AND INCLUDING THE

CLOVER CREEK BASIN. IDAHO, NEVADA,

UTAH, WYOMING.

17040203. -- IDAHO FALLS . IDAHO .

17040202 -- UPPER HENRYS . IDAHO, WYOMING.

17040203 -- LOWER HENRYS . IDAHO, WYOMING.

17040204 --- TETON. IDAHO, WYOMING.

17040205 - WILLOW . IDAHO .

17040206 -- AMERICAN FALLS . IDAHO .

17040207 -- BLACKFOOT. IDAHO .

1704020E3 -- PORTNEUF . IDAHO.

17040209 -- LAKE WALCOTT. IDAHO .

17040210 -- RAFT . IDAHO, UTAH .

17040211 -- GOOSE. IDAHO, NEVADA, UTAH .

17040212 -- UPPER SNAKE-ROCK . IDAHO .

17040213 -- SALMON FALLS . IDAHO, NEVADA .

A9 9
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

170402 .14 -- BEAVER-CAMAS . IDAHO .

17040215 -- MEDICINE LODGE. IDAHO.

17040216 -- BIRCH. IDAHO .

17040217 -- LITTLE LOST . IDAHO .

17040218 -- BIG LOST . IDAHO .

17040219 -- BIG WOOD . IDAHO .

17040220 -- CAMAS. IDAHO .

17040221 -- LITTLE WOOD . IDAHO .

SUBREGION 1705 -- MIDDLE SNAKE: THE SNAKE RIVER BASIN BELOW THE

CLOVER CREEK BASIN TO HELLS CANYON DAM. IDAHO,

NEVADA, OREGON,.

ACCOUNTING UNIT 170501 -- MIDDLE SNAKE-BOISE : THE SNAKE RIVER BASIN

BELOW THE CLOVER CREEK BASIN TO AND

INCLUDING THE WEISER RIVER BASIN .

IDAHO, NEVADA, OREGON .

CATALOGING UNITS 17050101.-- C. J . STRIKE RESERVOIR. IDAHO.

17050102 -- BRUNEAU. IDAHO, NEVADA .

17050103 -- MIDDLE SNAKE-SUCCOR. IDAHO, OREGON .

17050104 -- UPPER OWYHEE . IDAHO, NEVADA .

17050.105 -- SOUTH FORK OWYHEE . IDAHO, NEVADA,

OREGON .

17050106 --- EAST LITTLE OWYHEE . IDAHO . NEVADA,

OREGON .

17050107 --- MIDDLE OWYHEE . IDAHO, NEVADA,

OREGON .

17050108 --- JORDAN . IDAHO, OREGON .

17050109 --- CROOKED-RATTLESNAKE . OREGON .

1705011.0 --- LOWER OWYHEE . OREGON .

17050111 --- NORTH AND MIDDLE FORKS BOISE. IDAHO.

17050112 --- BOISE-MORES . IDAHO .

17050113 ---SOUTH FORK BOISE . IDAHO .

17050114 --- LOWER BOISE. IDAHO .

17050115 --- MIDDLE SNAKE-PAYETTE . IDAHO,

OREGON .

17050116 --- UPPER MALHEUR. OREGON .

17050117 --- LOWER MALHEUR. OREGON .

17050118 --- BULLY . OREGON .

17050119 --- 'WILLOW . OREGON .

17050120 --- SOUTH FORK PAYETTE. IDAHO .

170501.21 ---'MIDDLE FORK PAYETTE. IDAHO.

17050].22 --- PAYETTE. IDAHO

170503.23 --- NORTH FORK PAYETTE . IDAHO .

170503.24 --- 'WEISER . IDAHO .

ACCOUNTING UNIT 170502 -- MIDDLE SNAKE-POWDER : THE SNAKE RIVER BASIN

BELOW 'THE WEISER RIVER BASIN

A100
H Y D R 0 L 0 G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS-AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

CATALOGING UNITS 1.7060201 . --

17060202 --

17060203 -

171060204 --

1',1060205 -

1.'106020Ei -

1.7060207 -

].'106020F3 --

].'1060205~ --

17060210

TO HELLS CANYON DAM. IDAHO, OREGON .

CATALOGING UNITS 17050201 ---- BROWNLEE RESERVOIR. IDAHO, OREGON .

17050202 ---- BURNT. OREGON .

17050203 --- POWDER . OREGON .

SU'BREGION 1706 -- LOWER SNAKE : THE SNAKE RIVER BASIN BELOW HELLS

CANYON DAM TO ITS CONFLUENCE WITH THE COLUMBIA

RIVER . IDAHO OREGON, WASHINGTON .

ACCOUNTING UNIT 170601 -- LOWER SNAKE : THE SNAKE RIVER BASIN BELOW

HELLS CANYON DAM TO ITS CONFLUENCE WITH

THE COLUMBIA RIVER, EXCLUDING THE SALMON.

AND CLEARWATER RIVER BASINS . IDAHO,

OREGON, WASHINGTON .

CATALOGING UNITS 17'060101 --- HELLS CANYON . IDAHO,

OREGON .

17060102 --- IMNAHA . OREGON .

17060103,--- LOWER SNAKE-ASOTIN . IDAHO, OREGON,

WASHINGTON .

17060104 -° UPPER GRANDE RONDE . OREGON .

17060105 -- WALLOWA. OREGON .

17060106-- LOWER GRANDE RONDE . OREGON,

WASHINGTON .

17060107 -- LOWER SNAKE-TUCANNON . WASHINGTON .

17060108 -- PALOUSE. IDAHO, WASHINGTON .

17060109 -- ROCK . IDAHO, WASHINGTON .

17060110 -- LOWER SNAKE . WASHINGTON .

ACCOUNTING UNIT 170602 -- SALMON : THE SALMON RIVER BASIN . IDAHO.

UPPER SALMON . IDAHO.

PAHSIMEROI . IDAHO.

MIDDLE SALMON-PANTHER . IDAHO .

LEMHI . IDAHO .

UPPER MIDDLE FORT{ SALMON . IDAHO .

LOWER MIDDLE FORK SALMON . IDAHO .

MIDDLE SALMON-CHAMBERLAIN . IDAHO .

SOUTH FORK SALMON . IDAHO .

LOWER SALMON . IDAHO .

LITTLE SALMON . IDAHO.

ACCOUNTING UNIT 17060:3 -- CLEARWATER : THE CLEARWATER RIVER BASIN.

IDAHO, WASHINGTON .

CATALOGING UNITS 17060301 -- UPPER SELWAY . IDAHO.

17060302 -- LOWER SELWAY . IDAHO .

1706030:3 -- LOCHSA . IDAHO .

A101
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

1706CI304 -- MIDDLE FORK CLEARWATER. IDAHO .

17060305 -- SOUTH FORK CLEARWATER . IDAHO .

1706CI306 -- CLEARWATER . IDAHO, WASHINGTON .

17060307 -- UPPER NORTH FORK CLEARWATER . IDAHO .

17060308 -- LOWER NORTH FORK CLEARWATER . IDAHO .

SUBREGION 1707 -- MIDDLE COLUMBIA : THE COLUMBIA RIVER BASIN BELOW THE

CONFLUENCE WITH THE SNAKE RIVER BASIN TO BONNEVILLE

DAM . OREGON, WASHINGTON .

ACCOUNTING UNIT 170701 -- MIDDLE COLUMBIA : THE COLUMBIA RIVER BASIN

BELOW THE CONFLUENCE WITH THE SNAKE RIVER

BASIN TO BONNEVILLE DAM, EXCLUDING THE

DESCHUTES AND JOHN DAY RIVER BASINS .

OREGON, WASHINGTON .

CATALOGING UNITS 17070101 -- MIDDLE COLUMBIA-LAKE WALLULA .

OREGON, WASHINGTON .

17070102 -- WALLA WALLA . OREGON, WASHINGTON .

17070103 -- UMATILLA . OREGON .

17070104 -- WILLOW. OREGON .

17070105 -- MIDDLE COLUMBIA-HOOD . OREGON,

WASHINGTON .

17070106 -- KLICKITAT . WASHINGTON .

ACCOUNTING UNIT 170702 -- JOHN DAY : THE JOHN DAY RIVER BASIN .

OREGON .

CATALOGING UNITS 17070201 -- UPPER JOHN DAY . OREGON .

17070202 -- NORTH FORK JOHN DAY . OREGON .

17070203 -- MIDDLE FORK JOHN DAY . OREGON .

17070204 -- LOWER JOHN DAY . OREGON .

ACCOUNTING UNIT 170703 -- DESCHUTES : THE DESCHUTES RIVER BASIN .

OREGON .

CATALOGING UNITS 17070:301 --- UPPER DESCHUTES . OREGON .

17070302 --- LITTLE DESCHUTES . OREGON .

17070303 --- BEAVER-SOUTH FORK . OREGON .

17070304 --- UPPER CROOKED . OREGON .

17070305 --- LOWER CROOKED . OREGON .

170703016 --- LOWER DESCHUTES . OREGON .

17070:307 --- TROUT . OREGON .

SUBREGION 1708 -- LOWER COLUMBIA : THE COLUMBIA RIVER BASIN BELOW

BONNEVILLE DAM, EXCLUDING THE WILLAMETTE RIVER

BASIN . OREGON, WASHINGTON .

ACCOUNTING UNIT 170800 -- LOWER COLUMBIA . OREGON, WASHINGTON .

A10 2
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

CATALOGING UNITS 17080001.--- LOWER COLUMBIA-SANDY . OREGON,

WASHINGTON .

17080002, --- LEWIS. WASHINGTON .

17'080003 -- LOWER COLUMBIA-CLATSKANIE . OREGON,

WASHINGTON .

17'080004 -- UPPER COWLITZ. WASHINGTON .

17'080005 -- LOWER COWLITZ . WASHINGTON .

17080006 -- LOWER COLUMBIA . OREGON, WASHINGTON .

SUBREGION 1709 -- WILLAMETTE : T13E WILLAMETTE RIVER BASIN . OREGON .

ACCOUNTING UNIT 17090C1 -- WILLAMETTE . OREGON .

CATALOGING UNITS 17090001. -- MIDDLE FORK WILLAMETTE . OREGON .

17090002: -- COAST FORK WILLAMETTE . OREGON .

17090003 -- UPPER WILLAMETTE OREGON .

17090009 -- MCKENZIE . OREGON

17090005 -- NORTH SANTIAM. OREGON .

17090006 -- SOUTH SANTIAM. OREGON .

17090007 -- MIDDLE WILLAMETTE . OREGON .

17090008 -- YAMHILL. OREGON .

1.7090009 -- MOLALLA-PUDDING . OREGON .

1,7090010 -- TUALATIN . OREGON .

1.7090017 . -- CLACKAMAS . OREGON .

1709001e! -- LOWER WILLAMETTE . OREGON .

SUBREGION 1710 -- OREGON-WASHINGTON COASTAL : THE DRAINAGE INTO THE

PACIFIC OCEAN FROM THE STRAIT OF JUAN DE FUCA

DRAINAGE BOUNDARY TO THE SMITH RIVER BASIN BOUNDARY

EXCLUDING THE COLUMBIA RIVER BASIN. CALIFORNIA,

OREGON, WASHINGTON .

ACCOUNTING UNIT 171001 -- WASHINGTON COASTAL : THE DRAINAGE INTO THE

PACIFIC OCEAN FROM THE STRAIT OF JUAN DE

FUCA DRAINAGE BOUNDARY TO THE COLUMBIA

RIVER BASIN BOUNDARY . WASHINGTON .

CATALOGING UNITS 1.7100101 -- HOH-QUILLAYUTE . WASHINGTON .

3.710010:? -- QUEETS-QUINAULT . WASHINGTON .

3.7100103 -- UPPER CHEHALIS . WASHINGTON .

3.710010! -- LOWER CHEHALIS . WASHINGTON .

3.710010`.1 -- GRAYS HARBOR . WASHINGTON .

1'1100106 -- WILLAPA BAY . WASHINGTON .

ACCOUNTING UNIT 17100:2 -- NORTHERN OREGON COASTAL : THE DRAINAGE INTO

THE; PACIFIC OCEAN FROM THE COLUMBIA RIVER

BASIN BOUNDARY TO THE 'UMPQUA RIVER BASIN

BOUNDARY . OREGON .

A103
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

CATALOGING UNITS 17100201 -- NECANICUM . OREGON .

17100202 -- NEHALEM . OREGON .

17100203, -- WILSON-TRUSK-NESTUCCU . OREGON .

17100204 -- SILETZ-YAQUINA . OREGON .

17100205 -- ALSEA . OREGON .

17100206 -- SIUSLAW . OREGON .

17100207 -- SILTCOOS . OREGON .

ACCOUNTING UNIT 171003 -- SOUTHERN OREGON COASTAL : THE DRAINAGE INTO

THE PACIFIC OCEAN FROM .AND INCLUDING THE

UMPQUA RIVER BASIN TO THE SMITH RIVER

BASIN BOUNDARY . CALIFORNIA, OREGON .

CATALOGING UNITS 17100301.-- NORTH UMPQUA . OREGON .

17100,302 -- SOUTH UMPQUA . OREGON .

17100303 -- UMPQUA . OREGON .

17100304 ---COOS . OREGON .

17100305 -- COQUILLE . OREGON .

17100306 -- SIXES . OREGON .

17100307 -- UPPER ROGUE . OREGON .

17100308 -- MIDDLE ROGUE . OREGON .

17100309 -- APPLEGATE . CALIFORNIA, OREGON .

1710031.0 -- LOWER ROGUE . OREGON .

1710031.1.-- ILLINOIS . CALIFORNIA, OREGON .

1710031.2 -- CHETCO . CALIFORNIA, OREGON .

SUBREGION 1711 -- PUGET SOUND : THE DRAINAGE WITHIN THE UNITED STATES

THAT DISCHARGES INTO : (A) PUGET SOUND AND THE

STRAITS OF' GEORGIA AND OF JUAN DE FUCA ; AND (B) THE

FRkSER RIVER BASIN . WASHINGTON .

ACCOUNTING UNIT 171100 -- PUGET SOUND . WASHINGTON .

CATALOGING UNITS 17110001 --- FRASER . WASHINGTON .

171100012 --- STRAIT OF GEORGIA . WASHINGTON .

17110003 --- SAN JUAN ISLANDS . WASHINGTON .

17110004 -- NOOKSACK. WASHINGTON .

17110005 --- UPPER SKAGIT . WASHINGTON .

17110006 --- SAUK . WASHINGTON .

17110007 --- LOWER SKAGIT . WASHINGTON .

17110008 --- STILLAGUAMISH . WASHINGTON .

17110009 --- SKYKOMISH . WASHINGTON .

17110010 --- SNOQUALMIE . WASHINGTON .

17110011 --- SNOHOMISH . WASHINGTON .

17110012 --- LAKE WASHINGTON . WASHINGTON .

17110013 --- DUWAMISH . WASHINGTON .

17110014 --= PUYALLUP . WASHINGTON .

17110015 --- NISQUALLY . WASHINGTON .

A104
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

17110016 -- DESCHUTES . WASHINGTON .

17110017 -- SKOKOMISH . WASHINGTON .

17110018 -- HOOD CANAL . WASHINGTON .

17110019 -- PUGET SOUND . WASHINGTON .

17110020 -- DUNGENESS-ELWHA . WASHINGTON .

17110021 -- CRESCENT-HOKO . WASHINGTON .

SUBREGION 1712 -- OREGON CLOSED BASINS : THE DRAINAGE OF THE GREAT

BASIN THAT DISCHARGES INTO THE STATE

OF OREGON . (CALIFORNIA, NEVADA, OREGON .

ACCOUNTING UNIT 171200 --- OREGON CLOSED BASINS . CALIFORNIA,

NEVADA, OREGON .

REGION 18 CALIFORNIA ;REGION --- (A) THE DRAINAGE WITHIN THE UNITED

STATES THAT ULTIMATELY DISCHARGES INTO THE PACIFIC OCEAN

WITHIN THE STATE OF CALIFORNIA ; AND (B) THOSE PARTS OF THE

GREAT BASIN (OR OTHER CLOSED BASINS) THAT DISCHARGE INTO

THE STATE OF CALIFORNIA. INCLUDES PARTS OF CALIFORNIA,

NEVADA, AND OREGON .

SUBREGION 1801 -- KLAMATH-NORTHERN CALIFORNIA COASTAL . THE DRAINAGE

INTO THE PACIFIC OCEAN FROM AND INCLUDING THE SMITH

RIVER BASIN TO AND INCLUDING THE STEMPLE

CREEK BASIN . CALIFORNIA, OREGON .

CATALOGING UNITS 1801.0101. -- SMITH . CALIFORNIA, OREGON .

1801.01.02 -- MAD-REDWOOD . CALIFORNIA .

1801.0103 -- UPPER EEL . CALIFORNIA .

1801.0104 -- MIDDLE FORK EEL . CALIFORNIA.

CATALOGING UNITS 17120001 -- HARNEY-MALHEUR LAKES . OREGON .

17120002 -- SILVIES . OREGON .

1712OC103 -- DONNER UND BLITZEN . OREGON .

17120004 -- SILVER . OREGON .

17120005 -- SUMMER LAKE . OREGON .

17120006 -- LAKE ABERT . OREGON .

17120007 -- WARNER LAKES . CALIFORNIA, NEVADA,

OREGON .

17120008 -- GUANO . NEVADA, OREGON .

17120009 -- ALVORD LAKE . NEVADA, OREGON .

ACCOUNTING UNIT 180101 -- NORTHERN CALIFORNIA COASTAL . THE DRAINAGE

INTO THE PACIFIC OCEAN FROM AND INCLUDING

THE SMITH RIVER BASIN TO AND INCLUDING

THE STEMPLE CREEK BASIN, EXCLUDING THE

KLAMATH RIVER BASIN . CALIFORNIA, OREGON .

A105
H Y D R O L Ci G I C UNIT CODES

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

18010105 -- LOWER EEL . CALIFORNIA.

18010106 -- SOUTH FORK EEL . CALIFORNIA .

1801010'7 -- MATTOLE . CALIFORNIA .

18010108 -- BIG-NAVARRO-GARCIA . CALIFORNIA .

18010109 -- GUALALA-SALMON . CALIFORNIA .

1801011() -- RUSSIAN . CALIFORNIA .

18010111 -- BODEGA BAY . CALIFORNIA .

ACCOUNTING UNIT 180102 -- KLAMATH . THE KLAMATH RIVER BASIN.

COALI.FORNIA, OREGON .

CATALOGING UNITS 18010201 -- WILLIAMSON . OREGON .

18010202 -- SPRAGUE . OREGON .

18010203 -- UPPER KLAMATH LAKE . OREGON .

18010204 -- LOST . CALIFORNIA, OREGON .

18010205 -- BUTTE . CALIFORNIA, OREGON .

18010206 -- UPPER KLAMATH. CALIFORNIA, OREGON .

1801020-7 -- SHASTA . CALIFORNIA .

18010208 -- SCOTT . CALIFORNIA .

180102051 -- LOWER KLAMATH. CALIFORNIA, OREGON .

180102:10 -- SALMON . CALIFORNIA .

180102 :11. -- TRINITY . CALIFORNIA .

180102 .12 -- SOUTH FORK TRINITY. CALIFORNIA .

SUBREGION 1802 -- SACRAMENTO . THE SACRAMENTO RIVER BASIN AND DRAINAGE

INTO GOOSE LAKE . CALIFORNIA, OREGON .

ACCOUNTING UNIT 1802'00 -- UPPER SACRAMENTO : THE SACRAMENTO RIVER

BASIN TO AND INCLUDING SHASTA LAKE AND

DRAINAGE INTO GOOSE LAKE . CALIFORNIA,

OREGON .

CATALOGING UNITS 18020001 --- GOOSE LAKE . CALIFORNIA, OREGON .

18020002 --- UPPER PIT. CALIFORNIA .

18020003 --- LOWER PIT. CALIFORNIA .

18020004 --- MCCLOUD . CALIFORNIA .

18020005 --- SACRAMENTO HEADWATERS . CALIFORNIA .

ACCOUNTING UNIT 180201 -- LOWER SACRAMENTO : THE SACRAMENTO RIVER

BASIN BELOW SHASTA DAM. CALIFORNIA .

CATALOGING UNITS 18020101 --- SACRAMENTO-LOWER COW-LOWER CLEAR.

CALIFORNIA .

18020102 --- LOWER COTTONWOOD . CALIFORNIA .

18020103 --- SACRAMENTO-LOWER THOMES .

CALIFORNIA .

18020104 -- SACRAMENTO-STONE CORRAL . CALIFORNIA. .

:'.8020105 --LOWER BUTTE. CALIFORNIA .

18020106 - LOWER FEATHER. CALIFORNIA .

A10 6
H Y D R O L O G I C: U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

18020107 --- LOWER YUBA . CALIFORNIA .

18020108 --- LOWER BEAR . CALIFORNIA .

18020109 --- LOWER SACRAMENTO . CALIFORNIA .

113020110----- LOWER CACHE. CALIFORNIA .

18020111--- LOWER AMERICAN . CALIFORNIA .

11302011:? ---SACRAMENTO-UPPER CLEAR. CALIFORNIA .

18020113 -- COTTONWOOD HEADWATERS . CALIFORNIA .

18020114 -- UPPER ELDER-UPPER THOMES .

CALIFORNIA .

18020115 -- UPPER STONY . CALIFORNIA .

180201115 -- UPPER CACHE. CALIFORNIA .

18020117 -- UPPER PUTAH. CALIFORNIA .

18020118 -- UPPER COW-BATTLE . CALIFORNIA .

18020119 -- MILL-BIG CHICO. CALIFORNIA .

18020120 -- UPPER BUTTE. CALIFORNIA .

18020121 -- NORTH FORK FEATHER. CALIFORNIA .

18020122 -- EAST BRANCH NORTH FORK FEATHER.

CALIFORNIA .

18020123 -- MIDDLE FORK FEATHER. CALIFORNIA .

18020124 -- HONCUT HEADWATERS . CALIFORNIA .

18020125 -- UPPER YUBA . CALIFORNIA .

18020126 -- UPPER BEAR. CALIFORNIA .

18020127 °- UPPER COON-UPPER AUBURN . CALIFORNIA .

18020128 -- NORTH FORK AMERICAN . CALIFORNIA .

18020129 -- SOUTH FORK AMERICAN . CALIFORNIA .

SUBREGION 1803 -- TULARE-BUENA VISTA LAKES : THE DRAINAGE INTO THE

TULARE AND BUENA VISTA LAKE CLOSED BASINS .

CALIFORNIA .

ACCOUNTING UNIT 180300 -- TULARE-BUENA VISTA LAKES . CALIFORNIA .

CATALOGING UNITS 1.8030001 -- UPPER KERN . CALIFORNIA .

1.8030002 -- SOUTH FORK KERN . CALIFORNIA .

1.8030003 -- MIDDLE KERN-UPPER TEHACHAPIGRAPEVINE . CALIFORNIA .

1.8030004 -- UPPER POSO . CALIFORNIA .

1.8030005 -- UPPER DEER-UPPER WHITE . CALIFORNIA .,

1.8030006 -- UPPER TULE . CALIFORNIA .

1 .8030007 -- UPPER KAWEAH . CALIFORNIA .

1 .8030008 -- MILL . CALIFORNIA .

1 .8030009 -- UPPER DRY . CALIFORNIA .

1 .803001. 0 -- UPPER KING : CALIFORNIA .

1 .803001.1 --- UPPER LOS GATOS-AVENAL . CALIFORNIA,.

1,803001.2 --- TULARE-BUENA VISTA LAKES.

CALIFORNIA .

SUBREGION 1804 -- SAN JOAQU1'7LN : THE SAN JOAQUIN RIVER BASIN .

CALIFORNIA .

A107
H Y D Ft 0 L C) G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS,AND CATALOGING UNITS (CONTINUED)

ACCOUNTING UNIT 180400 -- S.AN JOAQUIN . CALIFORNIA .

CATALOGING UNITS 18040001 -- MIDDLE SAN JOAQUIN-LOWER

CHOWCHILLA . CALIFORNIA .

1804000'2 -- MIDDLE SAN JOAQUIN-LOWER

MERCED-LOWER STANISLAUS . CALIFORNIA .

1804000.3 -- SAN JOAQUIN DELTA. CALIFORNIA .

18040004 -- LOWER CALAVERAS-MORMON SLOUGH .

CALIFORNIA .

18040005 -- LOWER COSUMNES--LOWER MOKELUMNE.

CALIFORNIA .

18040006 -- UPPER SAN JOAQUIN . CALIFORNIA .

1804000'7 -- UPPER CHOWCHILLA-UPPER FRESNO .

CALIFORNIA .

18040008 -- UPPER MERCED . CALIFORNIA .

1804000'9 -- .UPPER TUOLUMNE . CALIFORNIA .

18040010 -- UPPER STANISLAUS . CALIFORNIA .

18040011 -- UPPER CALAVERAS . CALIFORNIA .

18040012 -- UPPER MOKELUMNE . CALIFORNIA .

18040013 -- UPPER COSUMNES . CALIFORNIA .

18040014 -- PANOCHE-SAN LUIS RESERVOIR.

CALIFORNIA .

SUBREGION 1805 -- SAN FRANCISCO BAY : THE DRAINAGE INTO THE PACIFIC

OCEAN FROM THE STEMPLE CREEK BASIN BOUNDARY

TO AND INCLUDING THE PESCADERO CREEK BASIN,

EXCLUDING THE SACRAMENTO AND SAN JOAQUIN RIVER

BASINS . CALIFORNIA .

ACCOUNTING UNIT 1805,00 -- SAN FRANCISCO BAY . CALIFORNIA .

CATALOGING UNITS 18050001 -- SUISUN BAY . CALIFORNIA .

18050002 -- SAN PABLO BAY . CALIFORNIA .

1805000:3 -- COYOTE . CALIFORNIA .

18050004 -- SAN FRANCISCO BAY . CALIFORNIA .

18050005 -- TOMALES-DRAKE BAYS . CALIFORNIA .

18050006 -- SAN FRANCISCO COASTAL SOUTH.

CALIFORNIA .

SUBREGION 1806 --- CENTRAL CALIFORNIA COASTAL : THE DRAINAGE INTO THE

PACIFIC OCEAN FROM THE PESCADERO CREEK BASIN

BOUNDARY TO AND INCLUDING THE RINCON CREEK BASIN.

CALIFORNIA .

ACCOUNTING UNIT 180600 -- CENTRAL CALIFORNIA COASTAL .

CALIFORNIA .

CATALOGING UNITS 18060001 -- SAN LORENZO-SOQUEL . CALIFORNIA .

A108
H Y D R O L O GI C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

18060002 -- PAJARO . CALIFORNIA .

1.8060003 -- CARRIZO PLAIN . CALIFORNIA .

1.8060004 -- ESTRELLA . CALIFORNIA .

1.8060005 -- SA:LINAS . CALIFORNIA .

1,8060006 -- CENTRAL COASTAL . CALIFORNIA .

18060007 -- CUYAMA . CALIFORNIA .

18060008 -- SANTA MARIA. CALIFORNIA .

18060009 -- SAN ANTONIO . CALIFORNIA .

18060010 -- SANTA YNEZ . CALIFORNIA .

18060013. -- ALISAL-ELKHORN SLOUGHS . CALIFORNIA .

1.8060012 -- CARMEL . CALIFORNIA .

1.8060013 -- SANTA BARBARA COASTAL . CALIFORNIA .

18060014 -- SANTA BARBARA CHANNEL ISLANDS .

CALIFORNIA .

SUBREGION 1807 -- SOUTHERN CALIFORNIA COASTAL : THE DRAINAGE WITHIN

THE UNITED STATES THAT DISCHARGES INTO

THE PACIFIC OCEAN FROM THE RINCON CREEK BASIN

BOUNDARY TO THE CALIFORNIA-BAJA CALIFORNIA

INTERNATIONAL BOUNDARY . CALIFORNIA .

ACCOUNTING UNIT 180701 -- VENTURA-SAN GABRIEL COASTAL : THE DRAINAGE

INTO THE PACIFIC OCEAN FROM THE RINCON

CREEK BASIN BOUNDARY TO AND INCLUDING THE

SAN GRABRIEL RIVER BASIN. CALIFORNIA .

CATALOGING UNITS 1807010:1 -- VENTURA. CALIFORNIA .

1B070102 -- SANTA CLARA. CALIFORNIA .

1807010.3 -- CALLEGUAS . CALIFORNIA .

18070104 -- SANTA MONICA BAY. CALIFORNIA.

18070105 -- LOS ANGELES. CALIFORNIA .

18070106 -- SAN GABRIEL. CALIFORNIA .

18070107 -- SAN PEDRO CHANNEL ISLANDS .

CALIFORNIA .

ACCOUNTING UNIT 180702 -- SANTA ANA: THE DRAINAGE INTO THE PACIFIC

OCEAN FROM THE SAN GABRIEL RIVER BASIN

BOUNDARY TO THE MORO CANYON DRAINAGE

BOUNDARY NEAR LAGUNA BEACH. CALIFORNIA .

CATALOGING UNITS 18070201 --- SEAL BEACH. CALIFORNIA .

18070202 --- SAN JACINTO. CALIFORNIA .

18070203 --- SANTA ANA. CALIFORNIA .

18070204 --- NEWPORT BAY . CALIFORNIA .

A&COUNTING UNIT 180703 -- LAGUNA-SAN DIEGO COASTAL: THE DRAINAGE

WITHIN THE UNITED STATES THAT DISCHARGES

INTO THE PACIFIC OCEAN FROM AND

INCLUDING THE MORO CANYON DRAINAGE BASIN

A10 9
H Y D R 0 L 0 G I G U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTIN13 UNITS AND CATALOGING UNITS (CONTINUED)

NEAR LAGUNA BEACH TO THE CALIFORNIA-BAJA

CALIFORNIA INTERNATIONAL BOUNDARY .

CALIFORNIA .

CATALOGING UNITS 18070301--- ALISO-SAN ONOFRE . CALIFORNIA .

18070302 --- SANTA MARGARITA. CALIFORNIA .

18070303 --- SAN LUIS REY-ESCONDIDO. CALIFORNIA .

18070304 --- SAN DIEGO. CALIFORNIA .

18070.'305 --- COTTONWOOD-TIJUANA . CALIFORNIA .

SUBREGION 1808 -- NORTH LAHONTAN : THE DRAINAGE FAST OF THE SIERRA

NEVADA AND NORTH OF THE TRUCKEE RIVER BASIN WHICH

INCLUDES THE LAHONTON CLOSED 13ASINS THAT

DISCHARGE INTO CALIFORNIA . CALIFORNIA, NEVADA .

ACCOUNTING UNIT 1801300 -- NORTH LAHONTAN . CALIFORNIA, NEVADA .

CATALOGING UNITS 18080001 --- SURPRISE VALLEY . CALIFORNIA, NEVADA.

18080002 --- '.MADELINE PLAINS . CALIFORNIA, NEVADA.

18080003 --- HONEY-EAGLE LAKES . CALIFORNIA,

NEVADA .

S'UBREGION 1809 -- NORTHERN MOJAVE-MONO LAKE : THE CLOSED DESERT

BASINS THAT DISCHARGE INTO SOUTH CENTRAL

CALIFORNIA, INCLUDING MONO LAKE, OWENS LAKE,

DEATH VALLEY, AND THE UPPER MOJAVE DESERT .

CALIFORNIA, NEVADA .

ACCOUNTING UNIT 180901 -- MONO-OWENS LAKES . THE MONO LAKE AND OWENS

LAKE CLOSED BASINS . CALIFORNIA, NEVADA .

CATALOGING UNITS 180903.01 -- MONO LAKE . CALIFORNIA, NEVADA .

180901.02 -- CROWLEY LAKE . CALIFORNIA, NEVADA .

180903.03 -- OWENS LAKE . CALIFORNIA .

ACCOUNTING UNIT 180902 -- NORTHERN MOJAVE : THE CLOSED DESERT

BASINS THAT DISCHARGE INTO SOUTH CENTRAL

CALIFORNIA, INCLUDING DEATH VALLEY AND

THE UPPER MOJAVE DESERT, EXCLUDING MONO

LAKE AND OWENS LAKE . CALIFORNIA, NEVADA .

CATALOGING UNITS 18090201 -- EUREKA-SALINE VALLEYS . CALIFORNIA,,

NEVADA .

18090202 -- UPPER AMARGOSA . CALIFORNIA, NEVADA .

18090203 -- DEATH VALLEY-LOWER AMARGOSA .

CALIFORNIA, NEVADA .

180902:04 -- PANAMINT VALLEY . CALIFORNIA .

180902.05 -- :INDIAN WELLS-SEARLES VALLEYS .

CALIFORNIA .

A110
H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

18090206 --- .ANTELOPE-FREMONT VALLEYS .

CALIFORNIA .

18090207 --- COYOTE-CUDDEBACK LAKES . CALIFORNIA. .

18090208 -- :MOJAVE . CALIFORNIA .

SUBREGION 1810 -- SOUTHERN MOJAVE-SALTON SEA: THE CLOSED DESERT

BASINS IN SOUTHEASTERN CALIFORNIA, INCLUDING THE

LOWER MOJAVE DESERT AND THE SALTON SEA.

CALIFORNIA .

ACCOUNTING UNIT 181001 -- SOUTHERN MOJAVE : THE LOWER MOJAVE DESERT .

CALIFORNIA .

CATALOGING UNIT 18100100 --- SOUTHERN MOJAVE . CALIFORNIA .

ACCOUNTING UNIT 181002 -- SALTON SEA : THE SALTON SEA CLOSED BASIN .

CALIFORNIA .

CATALOGING UNIT 18100200 --- SALTON SEA . CALIFORNIA .

REGION 19 ALASKA REGION -- THE DRAINAGE WITHIN THE STATE OF ALASKA .

INCLUDES ALL OF ALASKA

SUBREGION 1901 -- ARCTIC SLOPE : THE NORTH SLOPE DRAINAGE WITHIN THE

UNITED STATES THAT DISCHARGES INTO THE ARCTIC

OCEAN, INCLUDING THE BAYS, ISLANDS, AND ASSOCIATED

WATERS, FROM THE ALASKA-YUKON INTERNATIONAL

BOUNDARY TO ( :APE L I SBURNE . ALASKA .

ACCOUNTING UNIT 190100 -- ARCTIC SLOPE . ALASKA .

CATALOGING UNITS 19010001 -- EAST ARCTIC SLOPE. ALASKA .

19010OC12 --- COLVILLE . ALASKA .

19010003 --- WEST ARCTIC SLOPE. ALASKA .

SUBREGION 1902 -- NORTHWEST ALASKA : THE COASTAL DRAINAGE FROM CAPE

LISBURNE TO THE YUKON RIVER BASIN BOUNDARY,

INCLUDING THE BAYS, SOUNDS, ISLANDS, AND

ASSOCIATED WATERS ; AND ST . LAWRENCE ISLAND . ALASKA .

ACCOUNTING UNIT 190200 -- NORTHWEST ALASKA . ALASKA .

CATALOGING UNITS 19020001. -- KOTZEBUE SOUND . ALASKA .

19020002 -- NORTON SOUND-ST . LAWRENCE ISLAND .

ALASKA .

SUBREGION 1903 -- YUKON: THE YUKON RIVER BASIN WITHIN THE UNITED

Alll
HYDR0L0G I C: UN I T CODE S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS

AND CATALOGING UNITS (CONTINUED)

STATE=S, INCLUDING ITS DELTA. ALASKA .

ACCOUNTING UNIT 190300 -- YUKON., ALASKA .

CATALOGING UNITS 19030001 -- FORTYMILE-WHITE . ALASKA .

19030002 -- UPPER YUKON. ALASKA .

1903000,"3 -- MIDDLE YUKON . ALASKA .

19030004 -- TANANA . ALASKA .

1903000°.1 -- KOYUKUK. ALASKA .

19030006 -- LOWER YUKON . ALASKA.

SUBREGION 1904 -- SOUTHWEST ALASKA : THE COASTAL DRAINAGE FROM THE YUKON

RIVER BASIN BOUNDARY TO KUPREANOF POINT ON THE

ALASKA PENINSULA, INCLUDING THE BAYS, ISLANDS, AND

ASSOCIATED WATERS ; AND THE ISLANDS OF ST . MATTHEW,

NUNIVAK AND PRIBILOF, AND ALL OF THE ALEUTIAN

ISLANDS. ALASKA .

ACCOUNTING UNIT 190400 -- SOUTHWEST ALASKA . ALASKA .

CATALOGING UNITS 1'9040001 -- KUSKOKWIM BAY-NUNIVAK ISLAND-ST .

MATTHEW ISLAND . ALASKA .

19040002 -- BRISTOL BAY . ALASKA.

19040003 -- ALEUTIAN-PRIBILOF ISLANDS. ALASKA .

SUBREGION 1905 -- SOUTH CENTRAL ALASKA : THE COASTAL DRAINAGE WITHIN

THE UNITED STATES FROM KUPREANOF POINT ON THE

ALASKA PENINSULA TO THE ALASKA-YUKON INTERNATIONAL

BOUNDARY AND SOUTHWARD TO POINT RIOU, INCLUDING THE

BAYS, ISLANDS, SOUNDS, AND ASSOCIATED WATERS .

ALASKA .

ACCOUNTING UNIT 190500 -- SOUTH CENTRAL ALASKA . ALASKA .

CATALOGING UNITS 19050001 --- KODIAK-SHELIKOF . ALASKA .

19050002 --- COOK INLET. ALASKA .

19050003 --- GULF OF ALASKA. ALASKA .

S'UBREGION 1906 -- SOUTHEAST ALASKA : THE COASTAL DRAINAGE WITHIN THE

UNITED STATES FROM POINT RIOU TO THE ALASKA-BRITISH

COLUMBIA INTERNATIONAL BOUNDARY, INCLUDING THE

BAYS, ISLANDS, SOUNDS, AND ASSOCIATED WATERS .

ALASKA .

ACCOUNTING UNIT 190600 -- SOUTHEAST ALASKA . ALASKA .

CATALOGING UNIT 19060000 --- SOUTHEAST ALASKA . ALASKA .

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H Y D R O L O G I C U N I T C O D E S

BOUNDARY DESCRIPTION'S AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITS AND CATALOGING UNITS (CONTINUED)

REGION 20 HAWAII REGION -- THE DRAINAGE WITHIN THE STATE OF HAWAII .

INCLUDES ALL OF HAWAII .

SUBREGION 2001 -- HA14AII : THE DRAINAGE ON THE ISLAND OF HAWAII ; AND

ASSOCIATED WATERS . HAWAII .

ACCOUNTING UNIT 200,100 -- HAWAII . HAWAII .

CATALOGING UNIT 20010000 -- HAWAII . HAWAII .

SUBREGION 2002 -- MAUI : THE DRAINAGE ON THE ISLAND OF MAUI ; AND

ASSOCIATED WATERS . HAWAII .

ACCOUNTING UNIT 200'200 -- MAUI . HAWAII .

CATALOGING UNIT 20020000 -- MAUI . HAWAII .

SUBREGION 2003 -- KA'HOOLAWE : THE DRAINAGE ON THE ISLAND OF KAHOOLAWE ;

AND ASSOCIATED WATERS . HAWAII .

ACCOUNTING UNIT 200300 -- KAHOOLAWE. HAWAII .

CATALOGING UNIT 20030000 --- KAHOOLAWE. HAWAII .

SUBREGION 2004 -- LANAI : THE DRAINAGE ON THE ISLAND OF LANAI ; AND

ASSOCIATED WATERS . HAWAII .

ACCOUNTING UNIT 200400 -- LANAI . HAWAII .

CATALOGING UNIT 20040000 -- LANAI . HAWAII .

SUBREGION 2005 -- MOLOKAI : THE DRAINAGE ON THE ISLAND OF MOLOKAI ; AND

ASSOCIATED WATERS . HAWAII .

ACCOUNTING UNIT 200500 -- MOLOKAI . HAWAII .

CATALOGING UNIT 20050000 -- MOLOKAI. HAWAII .

SUBREGION 2006 -- OAHU : THE DRAINAGE ON THE ISLAND OF OAHU ; AND

ASSOCIATED WATERS . HAWAII .

ACCOUNTING UNIT 200600 -- OAHU . HAWAII .

CATALOGING UNIT 20060000 -- OAHU . HAWAII .

SUBREGION 2007 -- KAUAI : THE DRAINAGE ON THE ISLAND OF KAUAI ; AND

ASSOCIATED WATERS . HAWAII .

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H Y D R 0 L 0 G 7 : C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING UNITE; AND CATALOGING UNITS (CONTINUED)

ACCOUNTING UNIT 200700 -- KAUAI . HAWAII .

CATALOGING UNIT 20070000 --- KAUAI . HAWAII .

SUBREGION 2008 -- NIIHAU : THE DRAINAGE ON THE ISLANDS OF NIIHAU

AND KAUAA; AND ASSOCIATED WATERS . HAWAII .

ACCOUNTING UNIT 200800 -- NIIHAU . HAWAII .

CATALOGING UNIT 20080000 --- NIIHAU . HAWAII .

SUBREGION 2009 -- NORTHWESTERN HAWAIIAN ISLANDS: THE DRAINAGE ON

KURE, LAYSAN, LISIANSKI, NECKER, AND NIHOA ISLANDS;

GARDNER PINNACLES; MARO, AND PEARL AND HERMES

REEFS; FRENCH FRIGATE SHOALS ; AND OTHER ISLETS,

REEFS, AND ASSOCIATED WATERS NORTHWEST OF NIIHAU

ISLAND . HAWAII .

ACCOUNTING UNIT 200900 -- NORTHWESTERN HAWAIIAN ISLANDS . HAWAII .

CATALOGING UNIT 20090000 --- NORTHWESTERN HAWAIIAN ISLANDS.

HAWAII .

RF;GION 21 CARIBBEAN REGION --- THE DRAINAGE WITHIN : (A) THE COMMONWEALTH

OF PUERTO RICO ; (B ;) THE VIRGIN ISLANDS OF THE UNITED STATES ;

AND (C) OTHER UNITED STATES CARIBBEAN OUTLYING AREAS. INCLUDE

LAND AREAS OVER WHICH THE UNITED STATES HAS SOME DEGREE OF

INTEREST, JURISDICTION, OR SOVEREIGNTY .

SUBREGION 2101 -- PUERTO RICO : THE DRAINAGE AND ASSOCIATED WATERS

WITHIN THE COMMONWEALTH OF PUERTO RICO .

PUERTO RICO .

ACCOUNTING UNIT 210100 -- PUERTO RICO . COMMONWEALTH OF PUERTO RICO .

CATALOGING UNITS 21010001 --- INTERIOR PUERTO RICO .

PUERTO RICO .

21010002 -- CIBUCO-GUAJATACA . PUERTO RICO .

21010003 -- CULEBRINAS-GUANAJIBO . PUERTO RICO .,

21010004 --- SOUTHERN PUERTO RICO .

PUERTO RICO .

2101000!5 --- EASTERN PUERTO RICO . PUERTO RICO .

210100016 --- PUERTO RICAN ISLANDS . PUERTO RICO .,

SUBREGION 2102 -- VIRGIN ISLANDS : THE DRAINAGE AND ASSOCIATED WATERS

WITHIN THE; VIRGIN ISLANDS OF THE UNITED STATES .

U.S . VIRGIN ISLANDS .

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H Y D R 0 L 0 G 'I C U N I T C O D E S

BOUNDARY DESCRIPTIONS AND NAMES OF REGIONS, SUBREGIONS,

ACCOUNTING 'UNITS AND CATALOGING UNITS (CONTINUED)

ACCOUNTING UNIT 210200 -- VIRGIN ISLANDS. U.S . VIRGIN ISLANDS.

CATALOGING UNITS 21020001 -- ST . JOHN-ST. THOMAS .

U.S . VIRGIN ISLANDS .

21020002 -- ST . CROIX. U.S . VIRGIN ISLANDS.

S'UBREGION 2103 -- CARIBBEAN OUTLYING AREAS : THE DRAINAGE AND

ASSOCIATED WATERS WITHIN THE CANAL ZONE, NAVASSA

ISLAND, AND RANCADOR AND SERRANA BANKS.

ACCOUNTING UNIT 210300 -- CARIBBEAN OUTLYING AREAS .

CATALOGING UNITS 21030001 -- CANAL ZONE . PANAMA CANAL ZONE .

21030002 -- NAVASSA. NAVASSA ISLAND .

21030003 -- RONCADOR-SERRANA . RONCADOR AND

SERRANA BANKS .