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Water-Year Summary for Site 12137800

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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.
Available Parameters
00010 Temperature, water(Max.,Min.,Mean)  
00060 Discharge(Mean)  
00065 Gage height(Mean)  

Water year 2019: 2019-10-01 to 2020-09-30

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USGS Water-Year Summary 2019
LOCATION - Lat 47°57'34", long 121°47'46" referenced to North American Datum of 1927, in SE 1/4 NE 1/4 sec.32, T.29 N., R.8 E., Snohomish County, WA, Hydrologic Unit 17110009, on right bank 1000 ft downstream from City of Everett diversion dam on Sultan River, 6.8 mi north of Sultan, and at mile 9.4.
DRAINAGE AREA - 77.1 mi².
PERIOD OF RECORD - May 1983 to current year.
GAGE - Water-stage recorder and square notch sharp-crested weir in gate of dam. Datum of gage is 600.00 ft above NGVD of 1929 (City of Everett). Prior to Oct. 1, 1989, recording gage at site 350 ft downstream at different datum, Mar. 16 to Sept. 21, 1993, Jan. 7-10, 1994, Feb. 18 to Sept. 21, 1995, Dec. 3-7, 1995, Mar. 14 to Sept. 3, 1996, Mar. 13 to June 24, 1997, recording gage at site 1,200 ft downstream, at different datum.
REMARKS - Flow regulated at Spada Lake (station 12137300) since Apr. 5, 1965. Since May 1984, water is diverted at Spada Lake through a 10-ft diameter pipeline for power generation at the Jackson Project, and for municipal water supply at Lake Chaplain. Since July 1984, undetermined flows are returned to river at diversion dam by pipeline from Lake Chaplain for maintenance of instream flow requirements. U.S. Geological Survey satellite telemeter at station.
  • Water Year 2014: Records fair except for estimated daily discharges, which are poor.
  • Water Year 2015: No estimated daily discharges. Records fair.
  • Water Year 2016: Records fair except for estimated daily discharges, which are poor.
  • Water Year 2017: No estimated discharges. Records fair except for discharges above 500 ft³/s, which are poor.
  • Water Year 2018: No estimated discharges. Records fair except for discharges above 1,400 ft³/s, which are poor.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 19,000 ft³/s, Nov. 24, 1990, gage height, 63.79 ft, from rating curve extended above 3,200 ft³/s; minimum recorded discharge, 23 ft³/s, Oct. 30, 1988, result of regulation, but may have been lower Dec. 13, 14, 2001; minimum daily, 35 ft³/s, Aug. 23-25, 1983.
PERIOD OF RECORD - WATER TEMPERATURE: October 2009 to current year.
INSTRUMENTATION - Temperature recorder with 15-min logging interval.
  • Water Year 2014: Water temperature record excellent. No record May 29 to June 13 and August 27 to 28.
  • Water Year 2015: Water temperature record excellent except Oct. 30 to Nov. 18 and March 23 to July 13, which are good.
  • Water Year 2016 to 2017: Water temperature record excellent.
  • Water Year 2018: Water temperature record excellent except Dec. 21 to Sept. 30, which are good.
EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum, 15.4°C, Aug. 26-28, 2015; minimum, 0.9°C, Jan. 28, 2013.