USGS Water-Year Summary 2021
09172500 SAN MIGUEL RIVER NEAR PLACERVILLE, CO
LOCATION - Lat 38°01'50.54", long 108°06'37.04" referenced to North American Datum of 1983, in SE 1/4 SE 1/4 sec.30, T.44 N., R.11 W., San Miguel County, CO, Hydrologic Unit 14030003, on left bank on downstream side of bridge just off of Specie Creek road, 0.03 mi south of State Highway 145, 0.4 mi downstream from Specie Creek, and 3.35 mi northwest of Placerville.
DRAINAGE AREA - 309 mi².
- WDR-US-2011: Drainage area.
PERIOD OF RECORD - January to December 1909, September 1910 to November 1912 (published as "at Placerville"), April 1930 to September 1934, April 1942 to current year. Monthly discharge only for some periods, published in WSP 1313. Statistical summary computed for 1911 to current year.
GAGE - Water-stage recorder with satellite telemetry and crest-stage gage. Elevation of gage is 7,030 ft above NGVD of 1929, from topographic map. See WSP 1713 or 1733 for history of changes prior to Oct. 21, 1958. Oct. 22, 1958 to Mar. 4, 1986, gage located 0.8 mi upstream from present site, at different datum. Mar. 5, 1986, gage moved to present site, at present datum. Prior to Oct. 26, 2017, gage located 1.8 mi downstream from present site, at different datum.
PERIOD OF RECORD - November 2018 to current year.
INSTRUMENTATION - Air temp sensors with satellite telemetry. Elevation of gage is 7,030 ft above NGVD of 1929, from topographic map.
EXTREMES FOR PERIOD OF RECORD - Maximum instantaneous air temperature, 33.5 deg C, July 11, 2020. Minimum instantaneous air temperature, -24.7 deg C, Jan. 2, 2019.