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Water-Year Summary for Site 12137300

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Available Parameters
62614 Elevation, lake/res, NGVD29(Obs.)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
12137300 SPADA LAKE NEAR STARTUP, WA
LOCATION - Lat 47°58'28", long 121°41'10" referenced to North American Datum of 1927, in NW 1/4 sec.29, T.29 N., R.9 E., Snohomish County, WA, Hydrologic Unit 17110009, on left bank at Culmback Dam on Sultan River, 1.7 mi downstream from South Fork, 7.8 mi north of Startup, and at mile 16.5.
DRAINAGE AREA - 68.3 mi².
REVISIONS HISTORY - WDR WA-79-1: 1975-76(M). WA-95-1: 1994.
SURFACE-WATER RECORDS
PERIOD OF RECORD - April 1965 to current year.
GAGE - lake elevation Gage. Datum of gage is 3.74 ft. below NAVD of 1988 (conversion of NGS benchmark PID 207265) and datum of gage is NGVD of 1929 (levels by Snohomish County P.U.D. No. 1)
COOPERATION - Elevation at 2400 hours and capacity table furnished by Snohomish County Public Utility District No. 1.
REMARKS - Reservoir is formed by earthfill dam originally completed to elevation 1,408 ft in 1965. Storage began April 5, 1965, for water supply for the City of Everett. During 1983 the dam was raised to elevation 1,470 ft with storage beginning November 1983. Capacity was increased to 153,260 acre-ft at elevation 1,450 ft, crest of spillway. Normal operating pool is between elevations 1,420 ft and 1,450 ft. Figures given herein represent total contents. Spada Lake is used to provide water for the City of Everett, and since June 1, 1984, power generation for Snohomish County Public Utility District No. 1. 
EXTREMES FOR PERIOD OF RECORD - Maximum contents observed, 164,599 acre-ft, Nov. 23, 1990, elevation, 1,455.8 ft; minimum contents observed since reservoir was first filled, 4,250 acre-ft, Sept. 30, 1967, elevation, 1,301.28 ft.