Skip to Main Content
Skip to Navigation

Hinckley Reservoir Water Levels

Information on this page provides current data and operating parameters related to ongoing management of Hinckley Reservoir water levels.
Previous Data - 2009 Data | 2010 Data | 2011 Data | 2012 Data | 2013 Data | 2014 Data | 2015 Data | 2016 Data

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)
04/26 1224.6 N/A 1.4 1453 1680 1215 3265.0 N/A N/A 28.2 N/A N/A N/A
04/25 1224.8 N/A 2.0 1691 1680 1286 3247.0 N/A N/A 30.1 N/A N/A N/A
04/24 1225.1 N/A 2.7 1922 1680 1446 3224.0 N/A N/A 30.9 N/A N/A N/A
04/23 1225.5 N/A 3.6 2613 1800 2033 3192.0 N/A N/A 28.3 N/A N/A N/A
04/22 1225.9 N/A 4.9 3197 1800 3122 3137.0 N/A N/A 27.5 N/A N/A N/A
04/21 1226.0 N/A 5.7 2703 1800 3237 3046.0 N/A N/A 29.7 N/A N/A N/A
04/20 1225.6 N/A 5.8 2430 1800 2490 2953.0 N/A N/A 29.3 N/A N/A N/A
04/19 1225.6 N/A 6.4 2989 1800 2273 2888.0 N/A N/A 29.0 N/A N/A N/A
04/18 1226.1 N/A 7.3 3662 1800 3383 2828.0 N/A N/A 29.6 N/A N/A N/A
04/17 1226.4 N/A 8.2 3899 1800 4368 2736.0 N/A N/A 29.0 N/A N/A N/A
04/16 1226.0 N/A 8.7 2970 1800 3403 2607.0 N/A N/A 29.8 N/A N/A N/A
04/15 1225.7 N/A 9.3 2919 1800 2574 2515.0 N/A N/A 31.1 N/A N/A N/A
04/14 1226.0 N/A 10.4 3708 1800 3157 2451.0 N/A N/A 30.5 N/A N/A N/A
04/13 1226.4 N/A 11.6 4868 1800 4141 2367.0 N/A N/A 29.2 N/A N/A N/A
04/12 1227.0 N/A 12.8 5653 1400 6092 2254.0 N/A N/A 29.8 N/A N/A N/A
NY Power Authority Comments : The Jarvis discharge returned to the Operating Diagram discharge of 1400 cfs at midnight tonight. The over-discharge to reduce the flood risk is completed.
04/11 1226.7 N/A 13.2 3733 1400 4985 2075.0 N/A N/A 31.6 N/A N/A N/A
04/10 1225.8 N/A 13.0 2657 1400 2684 1933.0 N/A N/A 30.2 N/A N/A N/A
04/09 1225.8 N/A 13.5 3235 1400 2754 1875.0 N/A N/A 30.6 N/A N/A N/A
04/08 1226.2 N/A 14.5 3817 1400 5358 1837.0 N/A N/A 29.3 N/A N/A N/A
04/07 1225.1 N/A 14.2 2516 1400 7604 1737.0 N/A N/A 31.0 N/A N/A N/A
NY Power Authority Comments : The Hinckley release through Jarvis was reduced to 1800 cfs at about 11am, because of the reduced flood risk.
04/06 1221.2 N/A 11.1 3307 1400 5691 1547.0 N/A N/A 30.2 N/A N/A N/A
04/05 1219.4 N/A 10.2 3232 1400 9158 1396.0 N/A N/A 30.2 N/A N/A N/A
04/04 1214.3 N/A 6.1 2454 1400 5080 1127.0 N/A N/A 30.2 N/A N/A N/A
NY Power Authority Comments : The Canal Corporation, with input from NYPA and Brookfield Power, authorized a maximum discharge from all Jarvis outflow devices, in anticipation of a major flood event unfolding. The maximum discharge of 3100 cfs was achieved at 12:15pm.
04/03 1211.9 N/A 4.8 1558 1400 1792 998.0 N/A N/A 30.8 N/A N/A N/A
NY Power Authority Comments : The Canal Corporation authorized an increase in the turbine flow from 1400 to 1800 cfs in anticipation of a major flood event unfolding. The discharge of 1800 cfs was achieved at 15:46.
04/02 1211.7 N/A 5.5 1429 1400 1686 1005.0 N/A N/A 28.9 N/A N/A N/A
04/01 1211.5 N/A 6.2 1430 1400 1789 1068.0 N/A N/A 29.3 N/A N/A N/A
03/31 1211.2 N/A 6.8 1428 1400 1375 1213.0 N/A N/A 30.2 N/A N/A N/A
03/30 1211.3 N/A 7.8 1427 1400 1471 1265.0 N/A N/A 30.5 N/A N/A N/A
03/29 1211.2 N/A 8.6 1424 1400 1422 1303.0 N/A N/A N/A N/A N/A N/A
03/28 1211.3 N/A 9.4 1419 1400 904 1419.0 N/A N/A 31.0 N/A N/A N/A
03/27 1211.8 N/A 10.8 1419 1400 663 1697.0 N/A N/A 29.3 N/A N/A N/A
03/26 1212.5 N/A 11.9 1415 1400 594 1838.0 N/A N/A 30.2 N/A N/A N/A
03/25 1213.3 N/A 13.3 1417 1400 500 1880.0 N/A N/A 30.4 N/A N/A N/A
03/24 1214.1 N/A 14.1 1419 1400 373 1890.0 N/A N/A 29.9 N/A N/A N/A
03/23 1215.1 N/A 15.2 1416 1400 406 1893.0 N/A N/A 30.9 N/A N/A N/A
03/22 1216.0 N/A 16.3 1413 1400 441 1897.0 N/A N/A 30.8 N/A N/A N/A
03/21 1216.9 N/A 17.3 1405 1400 533 1902.0 N/A N/A 29.3 N/A N/A N/A
03/20 1217.6 N/A 18.3 1409 1400 464 1899.0 N/A N/A 30.4 N/A N/A N/A
03/19 1218.4 N/A 18.9 1413 1400 633 1899.0 N/A N/A 29.0 N/A N/A N/A
03/18 1219.1 N/A 19.8 1415 1400 504 1891.0 N/A N/A 31.1 N/A N/A N/A
03/17 1219.9 N/A 20.7 1419 1400 648 1893.0 N/A N/A 30.6 N/A N/A N/A
03/16 1220.5 N/A 21.4 1422 1400 632 1894.0 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

Back to Top

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.