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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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2023 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)
03/26 1202.3 N/A 1.6 787 740 1535 664.0 983 324 N/A N/A N/A N/A
03/25 1201.4 N/A 1.3 784 740 1957 635.0 1230 431 30.7 N/A N/A N/A
03/24 1200.0 N/A 0.0 786 740 2238 594.0 1550 556 29.8 N/A N/A N/A
03/23 1198.1 N/A -1.8 784 740 987 544.0 752 275 30.5 N/A N/A N/A
03/22 1197.9 N/A -1.8 631 590 707 543.0 438 174 29.0 N/A N/A N/A
03/21 1197.8 N/A -1.8 631 590 761 557.0 N/A 147 30.3 N/A N/A N/A
03/20 1197.7 N/A -1.7 544 590 850 578.0 490 190 30.0 N/A N/A N/A
03/19 1197.3 N/A -2.2 445 620 1091 608.0 638 247 30.1 N/A N/A N/A
03/18 1196.4 N/A -2.9 436 620 932 609.0 740 267 29.3 N/A N/A N/A
03/17 1195.7 N/A -3.4 430 620 453 605.0 252 -999999 29.8 N/A N/A N/A
03/16 1195.7 N/A -3.4 431 620 387 615.0 237 -999999 29.5 N/A N/A N/A
03/15 1195.8 N/A -3.2 538 750 443 634.0 231 -999999 29.6 N/A N/A N/A
03/14 1196.0 N/A -2.8 539 750 427 651.0 219 -999999 29.0 N/A N/A N/A
03/13 1196.2 N/A -2.6 543 750 448 679.0 -999999 -999999 31.5 N/A N/A N/A
03/12 1196.3 N/A -2.4 523 880 365 723.0 -999999 -999999 30.5 N/A N/A N/A
03/11 1196.6 N/A -2.1 766 880 232 748.0 -999999 -999999 31.5 N/A N/A N/A
03/10 1197.4 N/A -1.3 908 880 306 756.0 -999999 -999999 32.4 N/A N/A N/A
03/09 1198.2 N/A -0.4 921 880 302 758.0 -999999 -999999 31.7 N/A N/A N/A
03/08 1199.1 N/A 0.5 1019 980 383 759.0 -999999 -999999 31.4 N/A N/A N/A
03/07 1200.0 N/A 1.2 1022 980 408 760.0 N/A -999999 31.4 N/A N/A N/A
03/06 1200.8 N/A 2.3 1023 980 394 754.0 274 -999999 31.4 N/A N/A N/A
03/05 1201.6 N/A 3.1 1043 1000 420 747.0 285 -999999 28.9 N/A N/A N/A
03/04 1202.3 N/A 3.5 1036 1000 502 745.0 273 -999999 29.8 N/A N/A N/A
03/03 1203.0 N/A 3.9 1040 1000 455 741.0 -999999 -999999 31.9 N/A N/A N/A
03/02 1203.7 N/A 4.3 1090 1000 514 739.0 -999999 -999999 30.8 N/A N/A N/A
03/01 1204.4 N/A 4.8 1025 1020 417 737.0 -999999 -999999 32.0 N/A N/A N/A
02/28 1205.1 N/A 5.4 1070 1020 496 740.0 -999999 -999999 30.8 N/A N/A N/A
02/27 1205.8 N/A 5.9 1056 1020 494 739.0 -999999 -999999 31.9 N/A N/A N/A
02/26 1206.4 N/A 6.2 1056 1030 508 739.0 -999999 -999999 30.8 N/A N/A N/A
02/25 1207.0 N/A 6.6 1062 1030 529 741.0 -999999 -999999 31.6 N/A N/A N/A
02/24 1207.6 N/A 7.0 1076 1030 653 739.0 N/A -999999 32.0 N/A N/A N/A
02/23 1208.1 N/A 7.4 1079 1030 723 737.0 415 133 32.0 N/A N/A N/A
02/22 1208.4 N/A 7.7 1016 970 753 733.0 470 136 30.3 N/A N/A N/A
02/21 1208.7 N/A 7.6 1010 970 938 731.0 562 171 31.6 N/A N/A N/A
02/20 1208.8 N/A 7.3 1012 970 1132 724.0 713 203 32.6 N/A N/A N/A
02/19 1208.7 N/A 7.0 1005 950 1411 712.0 983 284 30.6 N/A N/A N/A
02/18 1208.4 N/A 6.4 997 950 1729 700.0 1240 423 32.5 N/A N/A N/A
02/17 1207.6 N/A 5.5 998 950 1116 677.0 973 371 32.4 N/A N/A N/A
02/16 1207.5 N/A 5.1 1000 950 813 667.0 603 254 32.4 N/A N/A N/A
02/15 1207.7 N/A 5.0 931 890 767 670.0 467 190 33.1 N/A N/A N/A
02/14 1207.9 N/A 4.8 932 890 956 676.0 521 203 31.1 N/A N/A N/A
02/13 1207.9 N/A 4.4 932 890 963 688.0 657 236 34.7 N/A N/A N/A
02/12 1207.9 N/A 4.1 955 910 1260 727.0 902 297 32.7 N/A N/A N/A
02/11 1207.6 N/A 3.4 962 910 1751 743.0 1210 446 33.2 N/A N/A N/A
02/10 1206.8 N/A 2.2 959 910 1144 717.0 1110 444 33.5 N/A N/A N/A
02/09 1206.7 N/A 1.7 954 910 472 710.0 -999999 -999999 33.4 N/A N/A N/A
02/08 1207.2 N/A 1.8 1015 970 342 729.0 -999999 -999999 33.2 N/A N/A N/A
02/07 1207.9 N/A 2.1 1020 970 354 751.0 -999999 -999999 33.7 N/A N/A N/A
02/06 1208.6 N/A 2.5 1017 970 389 786.0 N/A -999999 33.0 N/A N/A N/A
02/05 1209.3 N/A 2.8 1064 1010 252 843.0 -999999 -999999 31.7 N/A N/A N/A
02/04 1210.1 N/A 3.4 1435 1010 175 952.0 -999999 -999999 30.4 N/A N/A N/A
02/03 1211.4 N/A 4.5 1437 1010 350 1102.0 -999999 -999999 31.3 N/A N/A N/A
02/02 1212.4 N/A 5.3 1218 1010 389 1152.0 -999999 -999999 32.5 N/A N/A N/A
02/01 1213.2 N/A 5.8 1083 1040 384 1204.0 N/A -999999 31.7 N/A N/A N/A
01/31 1213.9 N/A 6.3 1085 1040 458 1279.0 274 90 31.9 N/A N/A N/A
01/30 1214.5 N/A 6.6 1092 1040 511 1344.0 300 93 30.0 N/A N/A N/A
01/29 1215.0 N/A 6.9 1077 1070 462 1358.0 288 105 31.0 N/A N/A N/A
01/28 1215.6 N/A 7.3 1072 1070 506 1367.0 306 105 30.1 N/A N/A N/A
01/27 1216.1 N/A 7.7 1121 1070 548 1385.0 322 117 31.4 N/A N/A N/A
01/26 1216.6 N/A 8.1 1077 1070 498 1398.0 344 114 30.3 N/A N/A N/A
01/25 1217.1 N/A 8.5 1443 1400 567 1422.0 330 109 30.2 N/A N/A N/A
01/24 1217.9 N/A 9.2 1443 1400 613 1451.0 360 112 32.4 N/A N/A N/A
01/23 1218.6 N/A 9.9 1448 1400 696 1503.0 388 126 31.1 N/A N/A N/A
01/22 1219.2 N/A 10.6 1446 1400 715 1579.0 417 135 31.1 N/A N/A N/A
01/21 1219.8 N/A 10.9 1446 1400 798 1604.0 482 180 32.3 N/A N/A N/A
01/20 1220.4 N/A 11.2 1448 1400 1042 1592.0 581 237 30.4 N/A N/A N/A
01/19 1220.7 N/A 11.4 1445 1400 1035 1572.0 561 161 31.7 N/A N/A N/A
01/18 1221.0 N/A 11.6 1131 1070 811 1561.0 620 174 29.9 N/A N/A N/A
01/17 1221.3 N/A 11.6 1125 1070 898 1557.0 558 206 32.2 N/A N/A N/A
01/16 1221.5 N/A 11.6 1074 1070 941 1551.0 655 209 31.1 N/A N/A N/A
01/15 1221.6 N/A 11.5 1139 1080 1319 1545.0 965 269 29.9 N/A N/A N/A
01/14 1221.5 N/A 11.1 1136 1080 2154 1529.0 1490 431 31.9 N/A N/A N/A
01/13 1220.7 N/A 10.0 1129 1080 1736 1482.0 1410 390 29.6 N/A N/A N/A
01/12 1220.2 N/A 9.4 1225 1080 972 1449.0 536 122 31.8 N/A N/A N/A
01/11 1220.5 N/A 9.2 1215 1060 930 1440.0 491 138 31.4 N/A N/A N/A
01/10 1220.7 N/A 9.3 1120 1060 1050 1445.0 721 194 30.6 N/A N/A N/A
01/09 1220.8 N/A 9.1 1116 1060 984 1452.0 827 239 31.3 N/A N/A N/A
01/08 1220.9 N/A 9.0 1856 980 1413 1474.0 1090 255 30.4 N/A N/A N/A
01/07 1221.3 N/A 9.3 1858 980 2099 1524.0 1580 394 32.7 N/A N/A N/A
01/06 1221.1 N/A 8.9 1867 980 3517 1624.0 2480 682 33.2 N/A N/A N/A
01/05 1219.8 N/A 7.5 1872 980 4684 1665.0 3680 816 30.8 N/A N/A N/A
01/04 1217.5 N/A 5.2 1853 990 1847 1562.0 1480 529 31.5 N/A N/A N/A
01/03 1217.5 N/A 5.2 1850 990 1960 1571.0 1260 415 35.9 N/A N/A N/A
01/02 1217.5 N/A 5.2 1849 990 2621 1626.0 1740 629 35.4 N/A N/A N/A
01/01 1216.8 N/A 4.5 1861 1000 2397 1610.0 2160 667 31.5 N/A N/A N/A

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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.