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Water-Year Summary for Site 05115500
Datum of the gage is 1501.06 feet above North American Vertical Datum 1988 (NAVD88) and 1499.82 feet above National Geodetic Vertical Datum 1929 (NGVD29).
Previous locations and datums are as follows:
April 10th, 1936, to August 30th, 1959; a nonrecording gage was established at 101º35’7.48” W, 48º27’27.16” N (WGS84) on control structure of US Biological Survey (now [2022] known as US Fish and Wildlife Services) reservoir called Lake Darling, on upper Souris River, about 6 miles north of Foxholm, ND. Staff gages at a datum 77.18 feet higher.
July 1st, 1959, to August 8th, 1963; nonrecording gage of staff plates and a wire weight gage at original location at a datum of 77.18 feet higher.
August 9th, 1963, to September 30th, 1993; recording gage at original location at a datum 77.18 feet higher.
October 1st, 1993, to September 30th, 2022; recording gage at original location. Data were published in elevation in NGVD29.
October 1st, 2022, to present; recording gage at original location at current datum.
Reservoir is formed by earth dam; storage began in April 1936; dam completed in July 1936. Usable capacity, 118,600 acre-ft between elevation of 1,577 ft, sill of control gages, and 1,598 ft, legal full-capacity level. Flood-emergency maximum level is 1,601 ft (148,600 acre-ft). Dead storage below sill at control gages is 144 acre-ft. Figures given herein represent total contents based on capacity table dated April 12, 1995 (provided by U.S. Fish and Wildlife Service). Water is used during periods of low flow at wildlife refuges downstream.
EXTREMES FOR WATER YEAR 2014.--Maximum daily contents, 126,020 acre-ft, July 1, elevation, 1,598.75 ft,
wind aided; maximum elevation, 1598.93 ft, July 1, wind aided; minimum daily contents, 98,370 acre-ft,
many days in February and March, elevation, 1,595.90 ft.
MONTHEND ELEVATION AND CONTENTS AT 2400, WATER YEAR OCTOBER 2013 TO SEPTEMBER 2014
Date Elevation, in ft Contents, in acre-ft Change in contents Sep. 30 1,596.77 106,680 Oct. 31 1,596.39 103,040 -3,640 Nov. 30 1,596.31 102,270 -770 Dec. 31 1,596.13 100,560 -1,710 CAL YR 2013 ------- ------- +2,950 Jan. 31 1,595.98 99,130 -1,430 Feb. 28 1,595.91 98,470 -660 Mar. 31 1,597.58 114,520 +16,050 Apr. 30 1,596.34 102,560 -11,960 May 31 1,596.80 106,970 +4,410 June 30 1,598.74 125,920 +18,950 July 31 1,596.80 106,970 -18,950 Aug. 31 1,596.99 108,800 +1,830 Sep. 30 1,597.41 112,870 +4,070 WTR YR 2014 ------- ------- +6,190
EXTREMES FOR WATER YEAR 2015.--Maximum daily contents, 115,890 acre-ft, May 17, elevation,
1,597.72 ft, wind aided; maximum elevation, 1,598.03 ft, May 17, wind aided; minimum daily
contents, 98,090 acre-ft, January 23, elevation, 1,595.87 ft.MONTHEND ELEVATION AND CONTENTS AT 2400, WATER YEAR OCTOBER 2014 TO SEPTEMBER 2015
Date Elevation, in ft Contents, in acre-ft Change in contents Sep. 30 1,597.41 112,870 Oct. 31 1,596.94 108,320 -4,550 Nov. 30 1,596.38 102,940 -5,380 Dec. 31 1,596.19 101,130 -1,810 CAL YR 2014 ------- ------- +570 Jan. 31 1,595.92 98,560 -2,570 Feb. 28 1,595.94 98,750 +190 Mar. 31 1,596.90 107,930 +9,180 Apr. 30 1,597.31 111,900 +3,970 May 31 1,597.11 109,960 -1,940 June 30 1,597.20 110,830 +870 July 31 1,596.89 107,830 -3,000 Aug. 31 1,596.97 108,600 +770 Sep. 30 1,596.85 107,450 -1,150 WTR YR 2015 ------- ------- -5,420 EXTREMES FOR WATER YEAR 2016.--Maximum daily contents, 107,350 acre-ft, October 12, elevation,
1,596.84 ft; minimum daily contents, 95,720 acre-ft, November 21-23, elevation, 1,595.62 ft.MONTHEND ELEVATION AND CONTENTS AT 2400, WATER YEAR OCTOBER 2015 TO SEPTEMBER 2016
Date Elevation, in ft Contents, in acre-ft Change in contents Sep. 30 1,596.85 107,450 Oct. 31 1,595.84 97,800 -9,650 Nov. 30 1,595.63 95,820 -1,980 Dec. 31 1,595.91 98,470 +2,650 CAL YR 2015 ------- ------- +2,660 Jan. 31 1,595.91 98,470 0 Feb. 29 1,596.06 99,890 +1,420 Mar. 31 1,596.63 105,330 +5,440 Apr. 30 1,596.22 101,410 -3,920 May 31 1,596.38 102,940 +1,530 June 30 1,596.14 100,650 -2,290 July 31 1,596.23 101,510 +860 Aug. 31 1,595.88 98,180 -3,330 Sep. 30 1,595.90 98,370 +190 WTR YR 2016 ------- ------- -9,080 EXTREMES FOR WATER YEAR 2017.--Maximum daily contents, 107,060 acre-ft, June 23, elevation,
1,596.81 ft, wind aided; maximum elevation, 1,597.06 ft, June 22, wind aided; minimum daily
contents, 75,650 acre-ft, March 25, elevation, 1,593.45 ft.MONTHEND ELEVATION AND CONTENTS AT 2400, WATER YEAR OCTOBER 2016 TO SEPTEMBER 2017
Date Elevation, in ft Contents, in acre-ft Change in contents Sep. 30 1,595.90 98,370 Oct. 31 1,596.28 101,980 +3,510 Nov. 30 1,596.30 102,180 +200 Dec. 31 1,596.24 101,600 -580 CAL YR 2016 ------- ------- +3,130 Jan. 31 1,595.91 98,470 -3,130 Feb. 28 1,595.33 92,990 -5,480 Mar. 31 1,594.46 84,890 -8,100 Apr. 30 1,595.86 97,990 +13,100 May 31 1,596.19 101,130 +3,140 June 30 1,596.68 105,810 +4,680 July 31 1,596.32 102,370 -3,440 Aug. 31 1,595.88 98,180 -4,190 Sep. 30 1,595.74 96,860 -1,320 WTR YR 2017 ------- ------- -1,510