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Water-Year Summary for Site 08163500

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Available Parameters
00060 Discharge(Mean,Max.,Min.)  

Water year 2021: 2020-10-01 to 2021-09-30

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USGS Water-Year Summary 2021
08163500 Lavaca River at Hallettsville, TX
LOCATION - Lat 29°26'35", long 96°56'41" referenced to North American Datum of 1927, Lavaca County, TX, Hydrologic Unit 12100101, at downstream side of bridge on U. S. Highways 77 and 90A in Hallettsville, 0.7 mi downstream from Campbell Branch, and 11.5 mi upstream from Rocky Creek.
DRAINAGE AREA - 108 mi².
REVISIONS HISTORY - WSP 1312: 1942 (M), 1944 (M). WSP 1732: 1952 (M). WSP 2123: Drainage area.
PERIOD OF RECORD - July 1939 to Apr. 1993 (daily mean discharge), May 1993 to Sept. 1999 (peak discharges greater than base discharge 2,300 ft³/s), Oct. 1999 to 2015(annual peak stage). Full-range gage reactivated 2016 water year to present. PERIOD OF RECORD, Water-Quality.-- CHEMICAL DATA: Oct. 1967 to Feb. 1968. BIOCHEMICAL DATA: Oct. 1967 to Feb. 1968.
GAGE -  Crest-stage gage. Datum of gage is 186.72 ft above NGVD of 1929. Prior to Apr. 19, 1960, water-stage recorder for high stages and movable nonrecording gage for stages below about 6.2 ft. Apr 20, 1960 to Jun. 2, 1961, movable nonrecording gage at same site. Jun. 3, 1961 to Apr. 7, 1993, water-stage recorder at site 75 ft. downstream. Gage reactivated as full-range 2015 water year.

No known regulation or diversions. The Lavaca County Flood Control District No. 3 began channel rectification 1.6 mi. downstream from gage in Aug. 1983. This rectification project reached the gage on Jan. 26, 1984, and was completed in June 1984. The channel was previously rectified in 1959-60.

Some records listed in the "Period of Record" for surface water and water quality may not be available electronically.

EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage from about 1870 to 1940, 32.8 ft. Jul. 16, 1936, from information by local resident. Maximum stage since at least 1840, that of Aug. 31, 1981.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 99,500 ft³/s Aug. 31, 1981 (gage height, 41.1 ft., from floodmark), no flow at times in 1953, 1956, and 1990.
PERIOD OF RECORD - CHEMICAL DATA: Oct. 1967 to Feb. 1968. BIOCHEMICAL DATA: Oct. 1967 to Feb. 1968.