!P

!O

!O

!.

!.

CARBON

BIG HORN

MUSSELSHELLTREASURE

GOLDENVALLEY

YELLOWSTONE

STILLWATER

100700060908

100700060807 1008001605031008001506021008001505031007000404

03

100800150501100700080204

100800150601100800150502100800160504

100800150504

100700060805

100700060808

100800150603100700040601 100800160501

100800150605100700080205

100700080301

100700040405

100800150606

100700

041001

100700040603100700070602

100700070601 100800150604100700040602100700080302100700040503

10070004100210070004060410070004 0402

100800150609

100800150804

100700080303

100700070603

100800160505

100700041004100700040501100700040502

100700070605100700040904

100800150608

100700041006100700080304 100800150702

100800150806

100700070604

100700040903

100800150607

100800150704100700041003 100800150701 100800150705 100800150902

100800150703

100700070701100700080305

100700040902

100700041005 100700070403100800150706

100800150707 100800150904

100700070702100700070401

100700040703

100700070402100800151001

1007

0007

0 802

100700070703

100700070803100800151002

100700070103

100700070704

100700070102100700040808 100800151003

100700070804100700070404

100700070805

100700071101100700070104

100700071102

100700070101

100700070203

100700070801100800151004100700040801

100700070201

100700040805

1008

0 015

0905

100700071103100700070304 100700070503

100700070202100700070904

100402011601 100700070905 100800150906100800151005

100402011602 100700070903

100700070105 100700070107

100700070501

100700071106100700070301

101000010302100402011603 100700071007

100700070303

100700070502

100700071104

100700070302

100402011604

100700071105

100700071006

101000010301100402011506 100700070902

101000010303100700070901

101000 010304100700071003

100700071005

100402012305

100402012201

100402011701

100402012302100700071002100402020301

100402011702

100402012306

100700071001

101000010105100402012301

100402012303

100402012304

101000010307

101000010107100700071004

100402020201

100402011806

101000010305100402012202

101000010102100402020302

100402012307

101000010204100402011805

101000010402100402020402

100402020401100402012105 101000010104100402020203

100402011804101000010203100402020304

101000010101

100402012103 100402012104 101000010103100402020407100402020403100402011902 100402020404100402020108

100402011803

101000010403

100402012003

LITTLEBIGHORN

UPPERYELLOWSTONE-

LAKE BASIN

PRYOR

LOWERBIGHORN

UPPERMUSSELSHELL

MIDDLEMUSSELSHELL LOWER

YELLOWSTONE-SUNDAY

£¤87

¬«47

Sand Creek

Clarks

Fork Yel

lowstone River

Bigho

rnRiv

er

Canyon Creek

Valley Creek

£¤12

£¤212

Fattig

Creek

£¤12

Yellowstone River

§̈¦94

Musselshell River

Merrills Springs Creek

North Fork Alkali Creek

Hawk Cree

k

Big Woody Creek

Horsethief Creek

Blue Cree

k

£¤212

Tullock Creek

Alkali Creek

Dusty Creek

Buffalo Creek

Cedar Creek

South Fork Crooked Creek

Williams Coulee

Hibbard Creek

£¤87

Crooked Creek

Willow Creek

Little Woody Creek

Big Coulee Creek

East Buffalo Creek

£¤12Cameron Creek

§̈¦90

Razor Creek¬«3

Currant Creek

£¤87

§̈¦90

Pompeys Pillar Creek

Little Bighorn River

Railroad Creek

Woody Creek

North Fork Crooked Creek

North Fork Valley Creek

Peritsa Creek

Painted Robe Creek

Alkali Creek

East Fork

Pryor

Cree

k

Fly Cree

k

10070006081007000802 1008001505

1007000406

1007000803

1007000405

1007000404

1007000706 1008001605

1008001506

1007000408

10070004091007000410

1007000704

1008001507

1008001509

1007000707

1007000701

1007000708

10080015101007000702

10070007111007000709

10070007051007000703

1004020116

1004020115 1010000103

100700071010040201221004020117

1004020123

1010000104

1004020203

10100001011004020202

1004020118

1010000102

10040202041004020121

10040202011004020119

WordenShepherd

Roundup

ParkCity

Lavina

Laurel

Hardin

Custer

CrowAgency

Broadview

Billings

LegendLake - ReservoirPerennial RiverIntermittent StreamSub Watershed (Sixth Code)CountyWatershed (Fifth Code)Sub Basin (Fourth Code)

¹1:440,000Map Scale:

Sub Basin within Montana Basins

UPPER YELLOWSTONE-POMPEYS PILLAR 10070007HUC

Basin - A basin is a large-scale watershed,such as for the Montana, Missouri, Yellowstoneand Clark Fork rivers. These are also referredto by a U.S. Geological Survey coding schemecalled Hydrologic Unit Codes (HUCs). Each ofthese basins has a six-digit code called HUC6watersheds. HUC6 watersheds cover an averageof 2,525 square miles. Watersheds with moredigits are smaller. Subbasin - Subbasins are smaller scale basins,such as the Clark Fork Yellowstone River, MiddleFork Flathead River, Gallatin River, LowerMusselshell River or Little Bighorn River. Thesewatersheds have eight-digit codes and may becalled HUC8 watersheds. They average of748 square miles.Watershed - Technically speaking, this refersto all sizes of watersheds as defined above.However, it is common to use this term to referto watersheds of a size smaller than a basin orsubbasin. These watersheds have 10- digitcodes and may be called HUC10 watersheds.HUC10 watersheds average 64 square miles.Subwatershed - Subwatersheds are smallerwatersheds, on the scale of a community.These watersheds have 12- digit codes andmay be called HUC12 watersheds. HUC12watersheds average 4.4 square miles.