Post on 02-Jan-2020
transcript
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CARBON
BIG HORN
MUSSELSHELLTREASURE
GOLDENVALLEY
YELLOWSTONE
STILLWATER
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LITTLEBIGHORN
UPPERYELLOWSTONE-
LAKE BASIN
PRYOR
LOWERBIGHORN
UPPERMUSSELSHELL
MIDDLEMUSSELSHELL LOWER
YELLOWSTONE-SUNDAY
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Sand Creek
Clarks
Fork Yel
lowstone River
Bigho
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Canyon Creek
Valley Creek
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Fattig
Creek
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Yellowstone River
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Musselshell River
Merrills Springs Creek
North Fork Alkali Creek
Hawk Cree
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Big Woody Creek
Horsethief Creek
Blue Cree
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Tullock Creek
Alkali Creek
Dusty Creek
Buffalo Creek
Cedar Creek
South Fork Crooked Creek
Williams Coulee
Hibbard Creek
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Crooked Creek
Willow Creek
Little Woody Creek
Big Coulee Creek
East Buffalo Creek
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Razor Creek¬«3
Currant Creek
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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
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Fly Cree
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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.