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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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2020 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)
01/16 1211.5 N/A 1.6 946 940 350 1086.0 N/A N/A N/A 541.3 196 0
01/15 1212.1 N/A 2.0 938 940 256 1088.0 N/A N/A 30.5 541.3 206 0
01/14 1212.8 N/A 2.4 942 940 277 1092.0 N/A N/A 31.7 541.4 206 0
01/13 1213.4 N/A 2.7 981 980 278 1102.0 N/A N/A 32.5 541.4 206 0
01/12 1214.0 N/A 3.1 978 980 320 1119.0 N/A N/A 32.7 541.5 209 0
01/11 1214.7 N/A 3.5 982 980 288 1125.0 N/A N/A 32.4 541.5 211 0
01/10 1215.3 N/A 3.8 1007 1010 304 1128.0 N/A N/A 33.2 541.5 211 0
01/09 1215.9 N/A 4.2 1011 1010 213 1130.0 N/A N/A 33.2 541.6 217 0
01/08 1216.6 N/A 4.7 1008 1010 371 1137.0 N/A N/A 31.1 541.6 222 0
01/07 1217.2 N/A 5.2 1012 1010 426 1139.0 N/A N/A 31.3 541.7 1220 0
01/06 1217.7 N/A 5.5 1028 1030 572 1137.0 N/A N/A 32.4 542.5 1220 0
01/05 1218.1 N/A 5.8 1031 1030 582 1136.0 N/A N/A 32.1 543.2 1220 0
01/04 1218.5 N/A 6.2 1032 1030 698 1140.0 N/A N/A 31.5 544.1 1230 0
01/03 1218.8 N/A 6.5 1040 1030 944 1140.0 N/A N/A 31.8 N/A 1240 0
01/02 1218.9 N/A 6.6 1043 1030 767 1135.0 N/A N/A 32.6 545.2 1240 0
01/01 1219.2 N/A 6.8 1033 1030 696 1142.0 N/A N/A 32.8 N/A 1240 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.