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USGS Water-Year Summary 2024
08172400 Plum Creek at Lockhart, TX
LOCATION - Lat 29°55'22", long 97°40'44" referenced to North American Datum of 1927, Caldwell County, TX, Hydrologic Unit 12100203, on right bank 548 ft upstream from bridge on U.S. Highway 183, 2.7 mi north of Lockhart, 3.7 mi upstream from Town Creek, 5.0 mi downstream from Brushy Creek, and 30.4 mi upstream from mouth.
DRAINAGE AREA - 112 mi².
REVISIONS HISTORY - WSP 2123: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Apr. 1959 to current year.
PERIOD OF RECORD, Water-Quality.--
CHEMICAL DATA: Apr. 1962 to June 1966.
BIOCHEMICAL DATA: Apr. 1962 to June 1966.
GAGE - Water-stage recorder. Datum of gage is 431.19 ft above NGVD of 1929. Apr. 30, 1959, to July 25, 1968, at site 548 ft downstream at present datum. Satellite telemeter at station.
REMARKS - Records fair for Water Year. No known diversions above station. Flow is affected at times by discharge from the flood-detention pools of 17 floodwater-retarding structures. These structures control runoff from 67.8 square miles above this station. Since 1964, at least 10% of contributing drainage area has been regulated. No flow at times. 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 since at least 1905, 22 ft in June 1936 at present site; flood in 1951 reached a stage of 20 ft at present site, from information by local resident.
EXTREMES FOR PERIOD PRIOR TO REGULATION -
WATER YEARS 1959-1963: Maximum discharge, 26,600 ft³/s Oct. 29, 1960 (gage height, 20.62 ft). No flow at times.
AVERAGE DISCHARGE FOR PERIOD PRIOR TO REGULATION - 4 years (water years 1959-63), 48.2 ft³/s (34,940 acre-ft/yr).
