USGS Water-Year Summary for Site 08086400

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean)
	00400 pH(Max.,Min.,Med.)
	62615 Elevation, lake/res, NAVD88(Max.,Min.,Mean)

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Water year 2024: 2024-10-01 to 2025-09-30

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USGS Water-Year Summary 2024

08086400 Hubbard Creek Reservoir nr Breckenridge, TX

LOCATION - Lat 32°49'53", long 98°58'03" referenced to North American Datum of 1927, Stephens County, TX, Hydrologic Unit 12060105, on left bank just upstream from dam on Hubbard Creek, 1.4 mi upstream from U.S. Highway 183, 6.5 mi northwest of Breckenridge, and 12.6 mi upstream from mouth.

DRAINAGE AREA - 1,085 mi².

REVISIONS HISTORY - WDR TX-76-2: Drainage area. WDR TX-95-2: 1990-94.

SURFACE-WATER RECORDS

PERIOD OF RECORD - Oct. 1962 to Sept. 2003 (contents), Oct. 2003 to current year. PERIOD OF RECORD, Water-Quality.-- CHEMICAL DATA: Sept. 1963 to Feb. 2007. BIOCHEMICAL DATA: Sept. 1963 to Feb. 2007.

GAGE - Water-stage recorder. Datum of gage NAVD 1988. Prior to Oct 1, 2010, datum of gage NGVD 1929 (0.55 ft. above NAVD 1988). Satellite telemeter at station.

COOPERATION - Records of diversions may be obtained from West Central Texas Municipal Water District.

REMARKS - Beginning Oct. 1, 2010, the datum of reservoir water-surface elevations for Hubbard Creek Reservoir is changed from National Geodetic Vertical Datum of 1929 to North American Vertical Datum of 1988. To convert water-surface elevations published prior to Oct. 1, 2010, to the current datum, add 0.31 feet. Interruptions in the record were due to instrumentation problems and editing of wind effect. The reservoir is formed by a rolled earthfill dam 5,630 ft long. There are two additional levees, the north and south, making an overall length of 3.5 mi. Storage began September 1962 and the dam was completed in December 1962. The emergency spillway is a 2,000-foot-wide cut through natural ground near the left end of dam. The service spillway is a partially controlled morning-glory type, with 12 lift gates designed to discharge 30,000 ft³/s with a 17.5-ft head through a 22.0-ft-diameter concrete conduit. The dam is the property of the West Central Texas Municipal Water District. Prior to Oct. 1, 1998, contents determined from capacity table dated Aug. 1, 1962, furnished by West Central Texas Municipal Water District. Data regarding the dam are given in the following table. The USGS is not responsible for errors in datum or elevations provided by other entities.

                                                                              Elevation (feet)
Top of dam............................................................         1,208.3
Design flood..........................................................         1,194.3
Top of gates..........................................................         1,185.3
Crest of spillway ....................................................         1,176.8
Lowest gated outlet (invert)..........................................         1,136.3

Beginning in the 2006 Water Year, water-quality data formerly published with this site are now published as:

Site ID  Site Name
324514099010201  Hubbard Creek Reservoir Site P11
324541099053601  Hubbard Creek Reservoir Site P18 (Discontinued)
324606099000201  Hubbard Creek Reservoir Site P10
324649099000501  Hubbard Creek Reservoir Site P09
324802099021601  Hubbard Creek Reservoir Site P15 (Discontinued)
324932098575101  Hubbard Creek Reservoir Site P01
324949098594301  Hubbard Creek Reservoir Site P13

EXTREMES FOR PERIOD OF RECORD - Maximum contents, 441,200 acre-ft, Oct. 14, 1981, elevation, 1,190.22 ft; minimum since normal operating level was reached in May 1969, 113,200 acre-ft, Mar. 18, 19, 2002, elevation, 1,164.08 ft. Minimum elevation, May 07, 2015, 1151.94 ft. Computation of contents discontinued Oct. 2003.

WATER-QUALITY RECORDS

PERIOD OF RECORD - CHEMICAL DATA: Sept. 1963 to current year. BIOCHEMICAL DATA: Sept. 1963 to current year.

REMARKS - On August 23, 2011 site P13 (324949098594301) was sampled instead of scheduled site P18 (324541099053601). The lake was too shallow for safe navigation at site P18. The following sites were also too shallow for safe navigation: P11-324514099010201 P12-324301099001701 P16-324653099032401 P17-324608099042101