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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
14034490 WILLOW CREEK LAKE AT HEPPNER, OR
LOCATION - Lat 45°20'50", long 119°32'37" referenced to North American Datum of 1927, in NW 1/4 SE 1/4 sec.35, T.2 S., R.26 E., Morrow County, OR, Hydrologic Unit 17070104, U.S. Army Corps of Engineers land, on top left side of spillway on dam on Willow Creek, 2,000 ft upstream from Court Street bridge and at mile 52.4.
DRAINAGE AREA - 96.6 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - February 1983 to current year.
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929 (levels by U.S. Army Corps of Engineers) and 3.62 ft above NAVD of 1988. Prior to Dec. 22, 1983, nonrecording gage at nearby site at present datum.
COOPERATION - Capacity table furnished by U.S. Army Corps of Engineers.
REMARKS - Lake is formed behind roller-compacted, concrete dam. Storage began Feb. 16, 1983, capacity, 14,020 acre-ft between elevations 2,000.0 ft, sill of outlet gates and 2,113.5 ft, crest of spillway. Average minimum lake elevation, 2,047.0 ft, storing 2,540 acre-ft. Dead storage, 73 acre-ft below elevation 2,000.0 ft. Lake's primary purposes are flood risk management, irrigation, and recreation. Month-end contents and change in contents discontinued water year 2014.
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 9,120 acre-ft June 6, 2011, elevation, 2,092.44 ft; no usable contents at times.
