USGS Water-Year Summary 2021
13210980 MASON CREEK AT CALDWELL ID
LOCATION - Lat 43°40'59.58", long 116°39'47.49" referenced to North American Datum of 1983, Canyon County, ID, Hydrologic Unit 17050114, Caldwell Quad, in NW 1/4 NW 1/4 SE 1/4 sec.14, T.4 N., R.3 W. on right bank 0.15 mi east of Polk Street.
DRAINAGE AREA - 4.70 mi².
PERIOD OF RECORD - December 2016 to current year.
GAGE - Water-stage recorder and crest-stage gage. Elevation of gage datum is arbitrary.
COOPERATION - Station is operated in cooperation with the State of Idaho Water District No. 63 and the Idaho Department of Water Resources (IDWR).
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 238 ft³/s, May 21, 2019, gage height, 7.48 ft; maximum gage height, 7.58 ft, May 16, 2017; minimum discharge, 16.7 ft³/s, Apr. 3, 2018.