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Hinckley Reservoir Water Levels

Information on this page provides current data and operating parameters related to ongoing management of Hinckley Reservoir water levels.
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2017 Water Level Data Table
Date Hinckley Reservoir Elevation
(ft)
Hinckley Reservoir
Comparison to Elevation Trigger
(ft)1
Hinckley Reservoir Comparison to Normal Elevation
(ft)2
Hinckley Reservoir
Discharge
(cfs)3
2012 Operating Diagram Release
(cfs)4
Hinckley Reservoir Inflow
(cfs)
Hinckley Reservoir
30-Day Running Average Inflow
(cfs)5
Wilmurt Streamgage Flow
(cfs)6
Black Creek Flow
(cfs)
Mohawk Valley Water Authority Withdrawal
(cfs)
Delta Reservoir Elevation
(ft)
Delta Reservoir Discharge
(cfs)
Nine Mile Feeder Discharge
(cfs)
03/21 1216.9 N/A 17.3 1405 1400 533 1946.0 N/A N/A 29.3 N/A N/A N/A
03/20 1217.6 N/A 18.3 1409 1400 464 1943.0 N/A N/A 30.4 N/A N/A N/A
03/19 1218.4 N/A 18.9 1413 1400 633 1943.0 N/A N/A 29.0 N/A N/A N/A
03/18 1219.1 N/A 19.8 1415 1400 504 1935.0 N/A N/A 31.1 N/A N/A N/A
03/17 1219.9 N/A 20.7 1419 1400 648 1936.0 N/A N/A 30.6 N/A N/A N/A
03/16 N/A N/A N/A N/A N/A N/A 1938.0 N/A N/A 27.2 N/A N/A N/A
03/15 1221.1 N/A 22.1 1424 1400 633 1896.0 N/A N/A 28.4 N/A N/A N/A
03/14 1221.8 N/A 23.0 1423 1400 751 1902.0 N/A N/A 29.4 N/A N/A N/A
03/13 1222.3 N/A 23.6 1422 1400 746 1910.0 N/A N/A 31.5 N/A N/A N/A
03/12 1222.9 N/A 24.3 1608 1400 718 1921.0 N/A N/A 33.0 N/A N/A N/A
NY Power Authority Comments : Hinckley returned to the Operating Diagram release today, as all of the water stored Jan18-Feb9 was released Feb10-Mar12.
03/11 1223.5 N/A 24.8 1817 1400 927 1948.0 N/A N/A 30.2 N/A N/A N/A
03/10 1224.2 N/A 25.5 1832 1400 1639 2004.0 N/A N/A 31.9 N/A N/A N/A
03/09 1224.3 N/A 25.6 1831 1400 2347 2014.0 N/A N/A 33.4 N/A N/A N/A
03/08 1224.0 N/A 25.4 1812 1800 1901 1959.0 N/A N/A 31.9 N/A N/A N/A
03/07 1223.9 N/A 25.2 1816 1800 1150 1913.0 N/A N/A 32.2 N/A N/A N/A
03/06 1224.4 N/A 25.9 1815 1800 1109 1893.0 N/A N/A 32.5 N/A N/A N/A
03/05 1225.0 N/A 26.5 1947 1400 1201 1875.0 N/A N/A 32.0 N/A N/A N/A
03/04 1225.5 N/A 26.7 2860 1400 2004 1853.0 N/A N/A 30.0 N/A N/A N/A
03/03 1226.2 N/A 27.1 4377 1400 3581 1809.0 N/A N/A 28.1 N/A N/A N/A
03/02 1226.8 N/A 27.4 3979 1400 6145 1711.0 N/A N/A 32.6 N/A N/A N/A
03/01 1225.2 N/A 25.6 1792 1400 2910 1526.0 N/A N/A 32.7 N/A N/A N/A
02/28 1224.4 N/A 24.6 1842 1400 2621 1451.0 N/A N/A 30.6 N/A N/A N/A
02/27 1223.8 N/A 23.9 1870 1400 4900 1391.0 N/A N/A 30.0 N/A N/A N/A
02/26 1221.5 N/A 21.4 1864 1400 9246 1258.0 N/A N/A 29.2 N/A N/A N/A
02/25 1215.2 N/A 14.8 1818 1400 4885 984.0 N/A N/A 29.6 N/A N/A N/A
02/24 1212.5 N/A 11.8 1802 1400 1878 857.0 N/A N/A 30.6 N/A N/A N/A
02/23 1212.4 N/A 11.7 1808 1400 776 835.0 N/A N/A 28.5 N/A N/A N/A
02/22 1213.4 N/A 12.6 1810 1400 483 858.0 N/A N/A 31.1 N/A N/A N/A
02/21 1214.6 N/A 13.5 1822 1400 530 885.0 N/A N/A 29.1 N/A N/A N/A
02/20 1215.8 N/A 14.2 1815 1400 592 898.0 N/A N/A 29.1 N/A N/A N/A
02/19 1216.8 N/A 15.0 1822 1400 426 906.0 N/A N/A N/A N/A N/A N/A
02/18 1218.0 N/A 16.0 1814 1400 474 923.0 N/A N/A N/A N/A N/A N/A
02/17 1219.2 N/A 17.1 1795 1400 395 937.0 N/A N/A N/A N/A N/A N/A
02/16 1220.3 N/A 17.9 1787 1400 544 952.0 N/A N/A N/A N/A N/A N/A
02/15 1221.3 N/A 18.6 1804 1500 696 963.0 N/A N/A 31.2 N/A N/A N/A
02/14 1222.2 N/A 19.1 1820 1500 694 977.0 N/A N/A N/A N/A N/A N/A
02/13 1223.1 N/A 19.6 1814 1500 800 1007.0 N/A N/A 29.0 N/A N/A N/A
02/12 1223.9 N/A 20.1 1808 1400 1011 1063.0 N/A N/A 29.2 N/A N/A N/A
02/11 1224.5 N/A 20.3 1764 1400 1058 1143.0 N/A N/A 29.5 N/A N/A N/A
02/10 1225.0 N/A 20.4 1931 1400 1521 1135.0 N/A N/A 30.1 N/A N/A N/A
02/09 1225.3 N/A 20.3 1384 1400 2604 1104.0 N/A N/A 29.6 N/A N/A N/A
NY Power Authority Comments : Canal Corporation, with agreement from Brookfield Power and NYPA, authorized a discharge of 1800 cfs, to begin at 10am today. This discharge above the Operating Diagram discharge will begin to work off the accumulated under-discharge that began January 18, 2017.
02/08 1224.4 N/A 19.0 436 1400 1949 1031.0 N/A N/A 30.1 N/A N/A N/A
02/07 1223.3 N/A 17.5 412 1400 694 979.0 N/A N/A 30.5 N/A N/A N/A
02/06 1223.1 N/A 17.1 411 1400 532 971.0 N/A N/A 29.2 N/A N/A N/A
02/05 1223.1 N/A 16.6 411 1400 531 971.0 N/A N/A 30.1 N/A N/A N/A
02/04 1223.0 N/A 16.3 410 1400 595 980.0 N/A N/A 30.2 N/A N/A N/A
02/03 1222.9 N/A 16.0 410 1400 530 991.0 N/A N/A 29.9 N/A N/A N/A
02/02 1222.8 N/A 15.7 409 1400 689 999.0 N/A N/A 30.0 N/A N/A N/A
02/01 1222.6 N/A 15.2 389 1400 636 998.0 N/A N/A 30.4 N/A N/A N/A
01/31 1222.4 N/A 14.8 404 1400 586 996.0 N/A N/A 29.3 N/A N/A N/A
01/30 1222.3 N/A 14.4 392 1400 668 1003.0 N/A N/A 31.6 N/A N/A N/A
01/29 1222.1 N/A 14.0 389 1080 823 1008.0 N/A N/A 29.6 N/A N/A N/A
01/28 1221.8 N/A 13.5 413 1080 907 1015.0 N/A N/A 29.3 N/A N/A N/A
01/27 1221.4 N/A 13.0 415 1080 1029 1027.0 N/A N/A 31.5 N/A N/A N/A
01/26 1221.0 N/A 12.4 411 1080 1082 1053.0 N/A N/A 29.5 N/A N/A N/A
01/25 1220.4 N/A 11.8 407 1030 1223 1053.0 744 283 28.8 542.7 780 0
01/24 1219.8 N/A 11.1 417 1030 1463 1031.0 835 300 31.0 542.1 763 0
01/23 1219.0 N/A 10.4 412 1030 1295 1005.0 848 283 29.4 541.7 735 0
01/22 1218.3 N/A 9.7 407 1000 899 989.0 635 238 29.0 541.3 726 0
01/21 1217.9 N/A 8.9 408 1000 839 989.0 463 219 32.0 541.2 718 0
01/20 1217.5 N/A 8.4 409 1000 923 996.0 499 243 28.5 541.3 718 0
01/19 1217.1 N/A 7.8 405 1000 900 1010.0 551 244 29.0 541.1 718 0
01/18 1216.7 N/A 7.3 640 900 849 1044.0 570 229 32.3 541.0 728 0
NY Power Authority Comments : Brookfield Renewable Power requested a reduction in Hinckley release to 400 cfs to relieve an operating issue. Canal Corporation agreed to the request. Hinckley release went to 400 cfs at 11am January 18. Makeup water will be rescheduled once the operating issue is resolved.
01/17 1216.6 N/A 6.9 925 900 891 1124.0 588 219 31.3 541.1 687 0
01/16 1216.6 N/A 6.7 926 900 1092 1159.0 738 247 29.4 541.4 686 0
01/15 1216.5 N/A 6.4 911 900 1613 1134.0 1010 342 26.9 541.6 720 0
01/14 1215.9 N/A 5.5 911 900 2486 1090.0 1650 670 32.2 541.7 750 0
01/13 1214.5 N/A 3.8 913 900 3391 1015.0 2090 907 29.6 541.0 764 0
01/12 1212.3 N/A 1.4 905 900 824 915.0 837 361 28.9 539.6 754 0
01/11 1212.4 N/A 1.2 930 930 586 903.0 452 205 30.6 539.7 687 0
01/10 1212.7 N/A 1.2 929 930 423 899.0 407 N/A 30.4 539.9 681 0
01/09 1213.2 N/A 1.5 933 930 395 899.0 354 N/A 29.4 540.4 681 0
01/08 1213.7 N/A 1.8 923 930 439 901.0 358 91 27.9 540.7 681 0
01/07 1214.2 N/A 2.2 929 930 543 907.0 349 90 30.1 541.1 681 0
01/06 1214.6 N/A 2.4 930 930 788 912.0 467 118 28.9 541.4 681 0
01/05 1214.7 N/A 2.4 926 930 922 913.0 568 146 27.8 541.4 691 0
01/04 1214.7 N/A 2.4 929 930 787 911.0 569 148 30.3 540.9 702 0
01/03 1214.9 N/A 2.6 930 930 649 919.0 449 120 29.2 N/A 713 0
01/02 1215.1 N/A 2.8 931 930 593 943.0 416 101 28.0 N/A 687 0
01/01 1215.5 N/A 3.2 927 930 782 994.0 490 127 29.0 0.0 683 0

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1 The Elevation Trigger is invoked when Hinckley Reservoir elevation falls below the 10% historical low level. The elevation trigger is 1222 feet in May, 1198 feet October 15 to December 31 and linearly interpolated from 1222 feet on May 31 and 1198 feet on October 15.

2 "Normal" Hinckley Reservoir elevations for a given date are based upon the average of 59 years of daily Hinckley Reservoir elevation data (1942-1979 and 1987-2007).

3 cfs is the abbreviation for cubic feet per second.

4 The 1920 Operating Diagram establishes the rate of release of water from Hinckley Reservoir based upon varying reservoir levels throughout the year. 

5 The Inflow Trigger is invoked when the 30-day running average Hinckley Reservoir inflow is below 300 cfs.

6 The Wilmurt plus Black Creek streamflow represents 80% of the Hinckley watershed area.