03574000 GUNTERSVILLE LAKE NEAR GUNTERSVILLE, AL Middle Tennessee-Elk Basin Guntersville Lake Subbasin
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Water-Data Report 2006 03574000 GUNTERSVILLE LAKE NEAR GUNTERSVILLE, AL Middle Tennessee-Elk Basin Guntersville Lake Subbasin LOCATION.--Lat 34°25′17″, long 86°23′34″ referenced to North American Datum of 1927, Marshall County, AL, Hydrologic Unit 06030001, in powerhouse at Guntersville Dam on Tennessee River, 11 mi northwest of Guntersville, and at mile 349.0. DRAINAGE AREA.--24,450 mi², approximately. SURFACE-WATER RECORDS PERIOD OF RECORD.--October 1938 to current year. GAGE.--Water-stage recorder. Datum of gage is NGVD of 1929. REMARKS.--Reservoir is formed by concrete dam with riprapped earth embankments. Spillway equipped with 18 two-section lift gates 40.44 ft high by 50 ft wide. Dam completed and storage began Jan. 16, 1939; water in reservoir first reached minimum navigation pool elevation Jan. 27, 1939. Total level pool capacity at elevation 595.44 ft (top of gates) is 530,400 ft³/s-day, of which 86,900 ft³/s-day is controlled flood storage above elevation 593.00 ft (minimum navigation pool). Reservoir is used for navigation, flood control, and power. Records furnished by Tennessee Valley Authority. Contents in ft³/s-days based on backwater profile. EXTREMES FOR PERIOD OF RECORD.--Maximum elevation 596.29 ft, Mar. 2, 1944; minimum (after start of operation plan in April 1940), 590.65 ft, Nov. 12, 1968. EXTREMES FOR CURRENT YEAR.--Maximum midnight contents during year, 525,500 ft³/s-day, Jan 19; maximum elevation, 595.35, July 11; minimum midnight contents, 464,500 ft³/s-day, Dec. 2, minimum elevation, 592.98 ft., Dec.2. MONTHEND ELEVATION AND CONTENTS AT MIDNIGHT, WATER YEAR OCTOBER 2005 TO SEPTEMBER 2006 Change in contents Date Elevation Contents (equivalent in cubic (feet) (acre-feet) (acre-feet) feet per second) Sept. 30…………….. 594.69 507,400 -- -- Oct. 31……………... 593.78 477,900 -29,500 -952 Nov. 30…………….. 593.58 481,900 +4,000 +133 Dec. 31…………….. 593.92 481,400 -500 -16 CAL YR 2005 -29,600 -81 Jan. 31……………… 593.82 493,800 +12,400 +400 Feb. 28……………… 594.18 492,000 -1,800 -64 Mar. 31……………… 594.10 494,600 +2,600 +84 Apr. 30……………… 594.50 490,600 -4,000 -133 May 31……………… 594.47 496,300 +5,700 +184 June 30……………… 594.43 500,900 +4,600 +153 July 31………………. 594.64 507,300 +6,400 +206 Aug. 31……………… 594.46 489,400 -17,900 -577 Sept. 30……………… 594.58 497,800 +8,400 +280 WTR YR 2006………. -9,600 -26 U.S. Department of the Interior U.S. Geological Survey .