USGS Water-Year Summary 2020
08073000 Addicks Reservoir near Addicks, TX
LOCATION - Lat 29°47'28", long 95°37'24" referenced to North American Datum of 1927, Harris County, TX, Hydrologic Unit 12040104, on left bank at dam on South Mayde Creek, 65 ft upstream from reservoir outlet works, 2,700 ft upstream from U.S. Highway 90 and Interstate Highway 10, 1.2 mi east of Addicks, and 1.4 mi upstream from mouth. Stilling well shelter abandoned after Hurricane Harvey and new shelter ( 2 X 2.5 X5 ft metal enclosure) sits atop the southwest corner of grated platform above the dam's outflow gates. New conduit run to radar and orifice in 2018 WY.
DRAINAGE AREA - 136 mi².
- WDR TX-77-2: Drainage area.
PERIOD OF RECORD - June 1948 to current year.
PERIOD OF RECORD, Water-Quality.--
CHEMICAL DATA: June 1978 to Sept. 1981.
BIOCHEMICAL DATA: June 1978 to Sept. 1981.
GAGE - Water-stage recorder. Datum of gage is NGVD 1988, 2001 adjustment. Prior to Oct. 1, 2008, datum of gage was NGVD of 1929, 1973 adjustment; unadjusted for land-surface subsidence since 1973 (3.12 ft above current datum). Prior to Oct. 1, 1980, datum of gage was unadjusted for land-surface subsidence that occurred prior to that date. Satellite telemeter at station.
COOPERATION - The capacity table, furnished by the U.S. Army Corps of Engineers, was based on extensive releveling survey in 1974, using NGVD of 1929, 1973 adjustment. Values converted to NAVD 1988, 2001 adjustment.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood in Dec. 1935 reached a stage of 89.9 ft, former datum, at bridge on U.S. Highway 90, 2,700 ft downstream from gage, from information by the U.S. Army Corps of Engineers.