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USGS Water-Year Summary 2024
08173000 Plum Creek near Luling, TX
LOCATION - Lat 29°41'58", long 97°36'12" referenced to North American Datum of 1927, Caldwell County, TX, Hydrologic Unit 12100203, on left bank at downstream side of bridge on county road, 1.2 mi upstream from West Fork, 1.9 mi upstream from Southern Pacific Railroad Co. bridge, 2.2 mi upstream from McNeil Creek, 2.9 mi northeast of Luling, and 7.5 mi upstream from mouth.
DRAINAGE AREA - 309 mi².
REVISIONS HISTORY - WSP 1923: 1933. WSP 2123: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Mar. 1930 to Sept. 1993, July 2001 to current year.
PERIOD OF RECORD, Water-Quality.--
CHEMICAL DATA: Feb. 1944, Apr. 1961 to Sept. 1986.
BIOCHEMICAL DATA: Apr. 1961 to Sept. 1973.
RADIOCHEMICAL DATA: Jan. 1981 to Mar. 1981.
SEDIMENT DATA: Nov. 1965 to June 1966.
PERIOD OF DAILY RECORD, Water-Quality.--
SPECIFIC CONDUCTANCE: Oct. 1967 to Sept. 1986.
WATER TEMPERATURE: Oct. 1967 to Sept. 1986.
GAGE - Water-stage recorder. Datum of gage is 321.57 ft above NGVD of 1929. Prior to Aug. 18, 1976, at datum 5.0 ft higher. Satellite telemeter at station.
REMARKS - Water Year records fair except for estimated daily which are considered poor. No known diversions above station. Flow is affected at times by discharge from the flood-detention pools of 27 floodwater-retarding structures. These structures control runoff from 119 mi² 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 1868, that of Oct. 18, 1998; flood in 1913 reached about same stage as that of July 1, 1936, from information by local residents.
EXTREMES FOR PERIOD PRIOR TO REGULATION - WATER YEARS 1930-63: Maximum discharge, 78,500 ft³/s, July 1, 1936, gage height, 30.70 ft from floodmarks (at datum then in use), from rating curve extended above 37,500 ft³/s; no flow at times.
AVERAGE DISCHARGE FOR PERIOD PRIOR TO REGULATION - 33 years (water years 1930-63) 90.3 ft³/s (65,370 acre-ft/yr).
