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USGS Water-Year Summary 2024
10170500 SURPLUS CANAL AT SALT LAKE CITY, UT
LOCATION - Lat 40°43'39.2", long 111°55'38.5" referenced to North American Datum of 1983, in SE 1/4 SW 1/4 SW 1/4 sec.14, T.1 S., R.1 W., Salt Lake County, UT, Hydrologic Unit 16020204, Located 320 feet downstream from diversion dam on right bank.
REVISIONS HISTORY - Prior to Nov 19, 2018 the datum of the gage was 4,223.93 ft above NGVD of 1929.
SURFACE-WATER RECORDS
PERIOD OF RECORD - December 1942 to current year.
GAGE - Water-stage recorder and acoustic velocity meter on right bank at pedestrian bridge. Datum of gage is 4,216.71 ft above NAVD of 1988 from a Level II GNSS survey conducted on November 19, 2018. Prior to March 3, 2022, located 1000 ft downstream on left bank. Prior to April 3, 2011, located 1000 ft upstream on left bank next to pedestrian bridge. Prior to April 20, 2006, located 350 ft upstream of pedestrian bridge on right bank at a different datum; September 30, 1966 to October 1, 1989, 1000 ft upstream of current location on right bank at different datum. From October 22, 1952 to September 30, 1966, at site 950 ft upstream at different datum.
REMARKS - Flow regulated by diversion structure 16,800 ft upstream of station. Canal was built to bypass floodwater of Jordan River around Salt Lake City residential and industrial area (see station 10170490 for records of combined flow of Jordan River and Surplus Canal). Several diversions for irrigation and waterfowl ponds below station. Records are good except for estimated daily discharges and periods with gage heights below 4.60 ft, which are poor.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 4,410 ft³/s, Jun 1, 1984, gage height, 8.91 ft, datum then in use; no flow Jan 21 to Feb 28, 1963.
