Click
to
hide
Water-Year
Summary
instructions
and
information
- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
08055500 Elm Fork Trinity River near Carrollton, TX
LOCATION - Lat 32°57'57", long 96°56'39" referenced to North American Datum of 1927, Dallas County, TX, Hydrologic Unit 12030103, at upstream side of bridge on Sandy Lake Road, 75 ft upstream from Carrollton Dam, 0.3 mi downstream from Denton Creek, 1.0 mi upstream from St. Louis Southwestern Railway Lines bridge, 2.3 mi northwest of Carrollton, and 18.2 mi upstream from mouth.
DRAINAGE AREA - 2,459 mi².
REVISIONS HISTORY - WSP 788: 1924. WSP 1148: Drainage area at former site. WSP 1632: 1908(M). WSP 1922: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Jan. 1907 to current year. Monthly discharge only for some periods, published in WSP 1312. Prior to Nov. 1923, published as "near Dallas".
PERIOD OF RECORD, Water-Quality.--
CHEMICAL DATA: Mar. 1971, Dec. 2002 to May 2005.
BIOLOGICAL DATA: Dec. 2002 to Nov. 2003.
PESTICIDE DATA: Dec. 2002 to May 2005.
PERIOD OF DAILY RECORD, Atmospheric.--
PRECIPITATION DATA: Oct. 2001 to Sept. 2002.
GAGE - Water-stage recorder and concrete control. Datum of gage is 431.40 ft above NGVD of 1929; 431.26 ft above NAVD of 1988. Prior to Nov. 1923, non recording gage at site 15.5 mi downstream at different datum. Nov. 1, 1923, to Nov. 13, 1934, non recording gage, and Nov. 14, 1934, to July 6, 1938, water-stage recorder at site 300 ft upstream and at present datum. July 7, 1938, to Apr. 14, 1939, non recording gage at site 9.3 mi downstream at datum 22.94 ft lower. Apr. 15, 1939 to Sept. 30, 1955, water-stage recorder at site 8.5 mi downstream at datum 22.94 ft lower. Oct. 1, 1955, to Sept. 30, 1987, water-stage recorder at site 300 ft upstream and at datum 2.00 ft higher. Oct. 1, 1987 to July 7, 1999, at site 300 ft upstream at present datum. Satellite telemeter at station.
REMARKS - Some records listed in the "Period of Record" for surface water and water quality may not be available electronically. Since water year 1955, at least 10% of contributing drainage area has been regulated. The City of Dallas diverts water from the pool at gage and from the river 14.0 mi downstream for municipal use. A wastewater treatment plant returns water to the river below the station. TXU Energy diverts water from the pool at gage into North Lake for cooling water at their electric generating plant. No flow at times.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood in 1866 reached about the same stage as flood of May 25, 1908.
EXTREMES FOR PERIOD PRIOR TO REGULATION - WATER YEARS 1907-1954: Maximum gage height, about 19 ft, May 25, 1908, present site and datum, from information by local resident; estimated discharge, 145,000 ft³/s, at site 8.5 mi downstream, from information by U.S. Army Corps of Engineers; maximum gage height subsequent to 1908, 16.5 ft, Apr. 26, 1942, present site and datum, from observation by National Weather Service; discharge at site 8.5 mi downstream, 90,700 ft³/s; no flow at times.
AVERAGE DISCHARGE FOR PERIOD PRIOR TO REGULATION - 47 years (water years 1908-54), 818 ft³/s (592,600 acre-ft/yr).
