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Water-Year Summary for Site 15278000

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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.
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Available Parameters
00065 Gage height(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023
LOCATION - Lat 61°24'39", long 149°07'20" referenced to North American Datum of 1927, in NE 1/4 NE 1/4 sec.18, T.15 N., R.2 E., Municipality of Anchorage, AK, Hydrologic Unit 19020401, (Anchorage B-6 quad), on north shore, 0.7 mi upstream from lake outlet, 12 mi upstream from mouth of Eklutna River, and 14 mi south of Palmer.
DRAINAGE AREA - 119 mi².
PERIOD OF RECORD - November 1946 to September 1962 (intermittent after January 1955), June 1983 to current year. Intermittent records for the period October 1962 to June 1983 available from Eklutna Hydroelectric Project.
GAGE - Water-stage recorder. Datum of gage is sea level (levels by Alaska Power Administration). Prior to June 1983, non-recording gage at lake outlet at datum of 859.8 ft above sea level.
REMARKS - Lake outlet consists of earth and rockfill dam with uncontrolled spillway crest at an elevation of 871.0 ft a.m.s.l. NGVD29. Prior to 1965, control structure 1400 ft upstream with spillway crest at elevation of 867.5 ft which could be flash-boarded to elevation of 871 ft. Outflow was controlled by the flash boards and sluice gates. Dead storage below elevation of 859 ft. Reservoir is used for power generation and water supply. GOES satellite telemetry at station.
EXTREMES FOR PERIOD OF RECORD - Maximum elevation, 877.68 ft, September 25, 1995; minimum observed, 814.2 ft, June 1, 1962.