!O
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.
