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USGS Water-Year Summary 2024
08167000 Guadalupe River at Comfort, TX
LOCATION - Lat 29°57'54.86", long 98°53'49.80" referenced to North American Datum of 1983, Kendall County, TX, Hydrologic Unit 12100201, at downstream side of U.S. Highway 87 bridge at Comfort, 0.1 mi downstream from Cypress Creek, and at mile 396.6.
DRAINAGE AREA - 839 mi².
REVISIONS HISTORY - WSP 1632: 1958. WSP 1732: 1939(M). WSP 2123: Drainage area, 1944(M), 1952(M), 1957(M), 1960(M).
SURFACE-WATER RECORDS
PERIOD OF RECORD - May 1939 to current year.
PERIOD OF RECORD, Water-quality.--
CHEMICAL DATA: Oct. 1964 to July 1967, Dec. 1996 to June 1997.
BIOLOGICAL DATA: Dec. 1996 to June 1997.
PESTICIDE DATA: Dec. 1996 to June 1997.
RADIOCHEMICAL DATA: Dec. 1996.
SEDIMENT DATA: Dec. 1996 to June 1997.
GAGE - Water-stage recorder. Datum of gage is 1,371.43 ft above NAVD of 1988. Prior to Nov. 27, 1939, nonrecording gage. Nov. 27, 1939, to June 2, 1980, water-stage recorder at present site at datum 2.22 ft higher. June 2, 1980 to Sept. 30, 1986, at site .4 mi downstream at datum 2.00 ft higher. Sept. 30, 1986 to Dec. 3, 2010 at site .4 mi downstream at datum 1.60 ft lower. Satellite telemeter at station.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of July 1869 reached a stage of 42.3 ft, present datum, from report by U.S. Army Corps of Engineers. Flood of July 1, 1932, reached a stage of 38.4 ft, from floodmark, and from information by Texas Department of Transportation. Flood of July 16, 1900, reached about the same stage as that of July 1, 1932, from information by local residents. Maximum stage since at least 1848, that of Aug. 2, 1978.
