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USGS Water-Year Summary 2024
08033500 Neches River near Rockland, TX
LOCATION - Lat 31°01'30", long 94°23'58" referenced to North American Datum of 1983, Tyler County, TX, Hydrologic Unit 12020003, on downstream side of bridge at U.S. Highway 69, 2,200 ft upstream from abandoned ferry crossing, 0.8 mi upstream from Texas and New Orleans Railway Co. bridge, 1.2 mi north of Rockland, 3.2 mi downstream from Billiams Creek and 32.4 mi upstream from Angelina River.
DRAINAGE AREA - 3,636 mi².
REVISIONS HISTORY - WSP 878: 1926-27. WSP 1342: 1922(M), 1935. WSP 1732: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - July 1903 to current year.
GAGE - Water-stage recorder. Datum of gage is 88.41 ft above NGVD of 1929. Prior to May 23, 1973, nonrecording gage located 2,200 ft downstream at datum 3.00 ft higher. May 23, 1973, to Sept. 30, 1975, recording gage at present site at datum 3.00 ft higher. Satellite telemeter at station.
REMARKS - Since water year 1962, at least 10% of contributing drainage area has been regulated. Some records listed in the "Period of Record" for surface water and water quality may not be available electronically.
EXTREMES OUTSIDE PERIOD OF RECORD - Historical flood information begins with flood in May 1884, which reached a stage of 38.0 ft, present site, from information by local resident (discharge, about 62,000 ft³/s).
EXTREMES FOR PERIOD PRIOR TO REGULATION - WATER YEARS, 1904-1961: Maximum discharge, 49,800 ft³/s May 6, 1944 (gage height, 35.04 ft), present site; minimum observed during period of daily records, 1.6 ft³/s Sept. 28-30, and Oct. 1, 2, 1956.
AVERAGE DISCHARGE FOR PERIOD PRIOR TO REGULATION - 58 years (water years 1904-1961), 2,362 ft³/s (1,711,000 acre-ft/yr).
WATER-QUALITY RECORDS
PERIOD OF RECORD - CHEMICAL DATA: Apr. 1941 to Sept. 1942, Sept. 1945 to Sept. 1947, Dec. 1967 to current year.
BIOCHEMICAL DATA: Dec. 1967 to current year.
PESTICIDE DATA: Oct. 1970 to Aug. 1986.
RADIOCHEMICAL DATA: Jan. 1981 to Apr. 1981.
PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Apr. 1941 to Sept. 1942, Sept. 1945 to Sept. 1947.
