USGS Water-Year Summary for Site 02397000

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	Available Parameters
	00010 Temperature, water(Mean)
	00045 Precipitation(Sum)
	00060 Discharge(Mean)
	00065 Gage height(Mean)

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

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USGS Water-Year Summary 2023

02397000 COOSA RIVER NEAR ROME, GA

LOCATION - Lat 34°12'01.8", long 85°15'23.1" referenced to North American Datum of 1983, Floyd County, GA, Hydrologic Unit 03150105, near left bank, attached to upstream end of the lock wall of Mayo's Bar Lock and Dam, 1.5 miles upstream from Webb Creek, 6.0 miles southwest of Rome, 7.5 miles downstream from confluence of Oostanaula and Etowah Rivers, and at mile 278.6.

DRAINAGE AREA - 4,040 mi².

REVISIONS HISTORY - WSP 1674, 1906: 1959(M) WDR GA-90-1: 1937-38(M), 1946(P), 1947(M), 1949(M), WDR GA-92-1: 1981. WATER TEMPERATURE: 2015 Water Year

SURFACE-WATER RECORDS

PERIOD OF RECORD -
DISCHARGE: October 1896 to December 1903 (published as "at Rome"), June 1928 to December 1931, March 1937 to December 1958, October 1962 to current year. Water years 1959-62 (annual maximum only).
GAGE HEIGHT: October 1998 to current year.

GAGE - Satellite telemetry with a water-stage recorder and a continuous water-quality monitor. Datum of gage is 553.19 feet above NAVD 0f 1988. From January 1, 1897, to December 31, 1903, a non-recording gage was located at site 7.5 miles upstream at datum 8.65 feet higher. From June 21, 1928, to December 31, 1931, and March 10, 1937 to December 31, 1958, a water-stage recorder was located at site 200 feet downstream at same datum. The station 02388525 Oostanaula River at US 27, at Rome, has been used as an auxiliary gage since 1963.

COOPERATION - U.S. Army Corps of Engineers, Mobile District; Georgia Power Company.

REMARKS - Gage-height records are generally good. Discharge records are generally poor. Additional details on the accuracy of the records can be obtained by contacting the USGS South Atlantic Water Science Center at gs-w-ga_nwisweb_data_inquiries@usgs.gov.

Flow regulated by Allatoona Reservoir since December 1949 and by Carters Lake and Carters re-regulation Reservoir since November 1974.

EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage known since at least 1834, 40.3 feet at site and datum at Rome, equivalent to about 43 feet at present site, from gage height relation, April 1, 1886, discharge, 100,000 cfs, from rating curve extended above 63,000 cfs on basis of peak flow at Gadsden, AL.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge recorded, 65,500 cfs, March 18, 1990; maximum gage height recorded, 35.97 feet, March 18, 1990; minimum daily discharge, 720cfs, August 18, 2008

CLIMATOLOGICAL RECORDS

PERIOD OF RECORD - December 14, 2000 to current year.

INSTRUMENTATION - Tipping-bucket raingage.

WATER-QUALITY RECORDS

PERIOD OF RECORD - March 1937, July 1957 to January 1959, August 1962 to February 1994, January 1996 to December 1996, September 1998, March 2005 to October 2005.

PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: March 2005 to January 2007.
pH: March 2005 to January 2007.
WATER TEMPERATURE: February 1985 to current year.
DISSOLVED OXYGEN: March 2005 to December 2006.
TURBIDITY: March 2005 to January 2007.

COOPERATION -
Continuous Water Temperature: Georgia Power Company.
Georgia Department of Natural Resources, Environmental Protection Division for historical continuous Specific Conductance, pH, Dissolved Oxygen, Turbidity, and Total Chlorophyll, and for historical periodic constituent analyses.

REMARKS -

For period 10/01/2017 to 09/30/2018: Water Temperature records are rated good.

For period 10/01/2018 to 02/04/2019: Water Temperature records are rated good.

For period 02/04/2018 to 09/30/2019: Water Temperature records are rated good.

EXTREMES FOR PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: Maximum recorded, 233 microsiemens, September 24, 2006; minimum recorded, 67 microsiemens, July 12, 2005.
pH: Maximum recorded, 9.0 units, June 22, 2006; minimum recorded, 6.9 units, July 13, 14, 2005.
WATER TEMPERATURE: Maximum recorded, 31.0 °C, July 19, 1986; minimum recorded, 1.5 °C, February 5, 1996.
DISSOLVED OXYGEN: Maximum recorded, 12.9 mg/L, December 13, 2005; minimum recorded, 5.1 mg/L, July 13, 14, 2005.
TURBIDITY: Maximum recorded, 290 FNU, July 8, 11, 12, 2005; minimum recorded, <2.0 FNU, April 13, 17, July 15, 2006.