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FLATHEAD

SANDERS

LINCOLN

170102130201170102130202170102120203170

102131

00 3 170102120201170102130402170102130803170102130801170102130802

170102131004 170102120103170102130104

170102130105

170102120104

170101020201

170102131302

170102131006

170101020202

170102131005

170101020106

170101020107

170102080203170102120102

170102130101

170102131303

170102130102

170102131301170101020401

170101020108170102080205

170102131104

170101020402 170101020104

170102080202

170101020101

170101020403 170102120101170102131103

170101020105

170101020103

170101020404170101020405 170102080201170101010801

170101010802

170102

13110 2

170101020102170102100302

170102100301

17010 2080207

170102131101

170101020306170101020304

170101010803

170102

100402170102100304

170102100305

170101020406

170101010804

170101020305

170102100303

170101011103

170101010805

170101011001170102100306170101010709

170101011002170102100202

170101020303

17010 2

100308

170101010707170102100307

170101010711

170101011105170102100203

170101020301

170101010705

170101020302

170102100201

170101011005 170101010710

170101010703170101010706

170102100204

170101010903170102100106170101010704 170101010701

170102100107

170101010708

170101011003 170101010202170101011207

170101011004 170102100102170101011201

LOWERFLATHEAD

STILLWATEROF THEFLATHEAD

LOWERCLARKFORKFISHER

UPPERKOOTENAI

Kootenai River

¬«37

Big Cherry Creek

Wolf Creek

¬«56

¬«200

Vermilion River

Bull River

PipeCreek

Pleasant Valley Fisher River

Libby C

reek

Fis her R

iver

¬«56

Good Creek

Logan Creek

Fishtrap Creek

Ashley

Creek

Fortine

Creek

£¤2

ThompsonRive

r

Silver B

utteFishe

r River

LakeC

reek

Litt leB

itte rroo

t River

1701021202170102120117010213021701021308

1701021310

1701010202

1701021301

1701021313

1701010201

17010213111701010204

1701020802

1701010108

17010210031701010111

1701021002

1701010203

1701010107

1701010110

17010101121701010109

1701021001

Noxon

Marion

Libby

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

¹1:300,000Map Scale:

Sub Basin within Montana Basins

FISHER 17010102HUC

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.