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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
12391400 CLARK FORK BELOW NOXON RAPIDS DAM, NEAR NOXON, MT
LOCATION - Lat 47°57'40.48", long 115°44'00.62" referenced to North American Datum of 1983, in SW 1/4 sec.33, T.26 N., R.32 W., Sanders County, MT, Hydrologic Unit 17010213, at Noxon Rapids Dam, 1 mi upstream from Rock Creek, 3 mi southeast of Noxon, and at river mile 169.7.
DRAINAGE AREA - 21,709 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - May 1960 to current year.
GAGE - Plant generator rating or discharge through powerplant. Water-stage recorder on reservoir determines head on taintor gates. Elevation of gage is 2,320 ft, referenced to the National Geodetic Vertical Datum of 1929 (levels by The Washington Water Power Co.).
COOPERATION - Records are furnished by the Avista Corporation, under general supervision of the Geological Survey, in connection with a Federal Power Commission project.
REMARKS - 10-01-2013 to 09-30-2014: records are good. Flow is regulated by Hungry Horse Reservoir (station 12362000) and Flathead Lake (station 12371500). Diversions for irrigation include about 350,000 acres upstream from station. Some sub-surface flow is indicated by comparison with records for adjacent gaging stations. Figures of discharge given herein are combined flows through turbines and spillway.
