Washington D.C.

Proposed DOI Region

State BoundaryWatershed:

AlaskaArkansas-White-RedCaliforniaGreat BasinGreat LakesLower ColoradoLower MississippiMid AtlanticMissouriNew EnglandOhioPacific NorthwestRio GrandeSouris-Red-RainySouth Atlantic-GulfTennesseeTexas-GulfUpper ColoradoUpper Mississippi

Regional headquartersnot yet determined

As of Monday, June 18, 2018

UpperMississippi

Basin4

Commonwealth of the Northern Mariana Islands

HawaiiAmericanSamoa Guam

160°W180°160°E 30°N

10°N

10°S

Joint Management Areas Based on County Boundaries13 Regions Not Splitting National Parks, National Wildlife Refuges, or National Forests

Gulf of Mexico249,026 miles2

Pacific388,270 miles2

0 80 160 240 320Miles

Conterminous U.S. and Hawaii

0 150 300 450 600 750Miles

Map by John Kosovich and Brendan BerveUSGS National Geospatial Technical Operations Center

Denver, COJuly 20, 2018

Arkansas-White-Red

California

GreatBasin

GreatLakes

LowerColorado

LowerMississippi

MidAtlanticMissouri

NewEngland

Ohio

PacificNorthwest

Rio Grande

Souris-Red-Rainy

SouthAtlantic-Gulf

Tennessee

Texas-Gulf

UpperColorado

UpperMississippi

12 Interior Region Names Based on WatershedsAlaska

11

North Atlantic-Appalachian

1

SouthAtlantic-Gulf

2

GreatLakes

3Missouri

Basin5

LowerColorado

Basin8

Columbia-Pacific

Northwest9

California-Great Basin

10

Arkansas-Rio Grande-Texas-Gulf

6

MississippiBasin

4

UpperColorado

Basin7

Pacific Islands12- Hawaii

- Guam- Commonwealth of the Northern Mariana Islands- American Samoa

U.S. Department of the Interior, U.S. Geological SurveyMap date: October 18, 2019

Puerto Rico andU.S. Virgin Islands

(Region 2)