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DESCRIPTION:

Latitude 46°23'04.54",   Longitude 105°50'43.88"   NAD83

Custer County, Montana, Hydrologic Unit 10090102

Drainage area: 5,405 square miles

Datum of gage: 2,351.40 feet above   NAVD88.

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Current / Historical Observations     (availability statement)	1991-10-01	2025-11-01
Daily Data
Temperature, water, degrees Celsius	2020-10-01	2025-10-31	3345
Discharge, cubic feet per second	1938-04-01	2025-12-11	30599
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2004-04-29	2025-10-31	12535
Suspended sediment concentration, milligrams per liter	1977-08-31	1985-12-04	3018
Suspended sediment discharge, short tons per day	1977-08-31	1985-12-04	3018
Sodium adsorption ratio (SAR), water, estimated by regression equation, number	2004-04-29	2013-04-09	4672
Daily Statistics
Temperature, water, degrees Celsius	2020-10-01	2025-10-31	1115
Discharge, cubic feet per second	1938-04-01	2025-11-18	30578
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2004-04-29	2025-10-31	4184
Suspended sediment concentration, milligrams per liter	1977-08-31	1985-12-04	3018
Suspended sediment discharge, short tons per day	1977-08-31	1985-12-04	3018
Sodium adsorption ratio (SAR), water, estimated by regression equation, number	2004-04-29	2013-04-09	1814
Monthly Statistics
Temperature, water, degrees Celsius	2020-10	2025-10
Discharge, cubic feet per second	1938-04	2025-11
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2004-04	2025-10
Suspended sediment concentration, milligrams per liter	1977-08	1985-12
Suspended sediment discharge, short tons per day	1977-08	1985-12
Sodium adsorption ratio (SAR), water, estimated by regression equation, number	2004-04	2013-04
Annual Statistics
Temperature, water, degrees Celsius	2021	2026
Discharge, cubic feet per second	1938	2026
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2004	2026
Suspended sediment concentration, milligrams per liter	1977	1986
Suspended sediment discharge, short tons per day	1977	1986
Sodium adsorption ratio (SAR), water, estimated by regression equation, number	2004	2013
Peak streamflow	1938-06-01	2025-06-06	84
Field measurements	1967-06-18	2025-11-19	503
Field/Lab water-quality samples (Legacy QW is frozen as of March 2024, newer data may be found on MLP)	1959-10-01	2016-10-25	848
Water-Year Summary	2006	2025	20
Revisions	Loading...

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