USGS Water-Year Summary for Site 08180700

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00060 Discharge(Max.,Min.,Mean)
	00065 Gage height(Max.,Min.,Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean)
	00300 Dissolved oxygen(Max.,Min.,Mean)
	00400 pH(Max.,Min.)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

08180700 Medina River near Macdona, TX

LOCATION - Lat 29°20'05", long 98°41'22" referenced to North American Datum of 1927, Bexar County, TX, Hydrologic Unit 12100302, at downstream side of Loop 1604 bridge, 0.1 mi downstream from Polecat Creek, 0.7 mi north of Macdona, 2.2 mi downstream from Potranca Creek, and 21.2 mi upstream from mouth.

DRAINAGE AREA - 885 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD -

Jan 1981 to Sep 1995,

May 1997 to Mar 2016.

Aug 2016 to current.

GAGE - Water-stage recorder. Datum of gage is 589.86 ft above NGVD of 1929. Satellite telemeter at station.

REMARKS - Since installation of gage in water year 1981, at least 10% of contributing drainage area has been regulated. A large part of the streamflow is lost into the Edwards and associated limestones where the Balcones Fault crosses the basin between the upstream end of Medina Lake and about 5 mi downstream from Medina Dam, or 0.9 mi downstream from the Medina Diversion Dam. There are several small diversions below Medina Diversion Dam. Some records listed in the "Period of Record" for surface water and water quality may not be available electronically.

WATER-QUALITY RECORDS

PERIOD OF RECORD - CHEMICAL DATA: July 1998 to Sept. 2000, Jan. 2006 to current year. BIOCHEMICAL DATA: July 1998 to Sept. 2000, Jan. 2006 to current year. PESTICIDE DATA: July 1998 to Sept. 2000, Jan. 2006 to current year. SEDIMENT DATA: July 1998 to Sept. 2000.

INSTRUMENTATION - A 4-parameter continuous water-quality monitor from Jan 2005 to Jan 03, 2014

REMARKS - A three-parameter monitor was installed on 11/01/01. The monitor records temperature, specific conductance, and turbidity every 15 minutes. Dissolved oxygen and pH were added 01/25/2005 with transmissions beginning on 01/29/2005. Turbidity was discontinued on 09/30/2005. Equipment was removed and site was discontinued on 01/03/2014.