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HINCKLEY RESERVOIR
Hinckley Reservoir
The Hinckley Reservoir is located in Herkimer and Oneida Counties approximately 14 miles north of Utica. The Hinckley Reservoir was constructed in the valley formed by West Canada Creek, which flows south out of the Adirondack Mountains and through the reservoir on its route to the Mohawk River at Herkimer. The surface area of Hinckley Reservoir is approximately 4.5 square miles when full and is fed by a drainage area of approximately 372 square miles.
Hinckley Reservoir has an average water depth of about 28 feet and a maximum depth of approximately 75 feet from the spillway crest. When full to the spillway crest, the reservoir has a usable capacity of approximately 25.8 billion gallons.
Hinckley Reservoir was constructed by the State of New York and completed in 1915 for the purpose of supplying water to the Erie Canal. Hinckley Reservoir is owned by the State of New York, presently under the jurisdiction of the New York State Canal Corporation.
Since 2003, the Hinckley Reservoir also serves as the sole source of drinking water for about 130,000 people in the greater Utica area.
Hinckley Downstream Releases
Hinckley Downstream Releases
As of April 1, 2013, the 2012 Operating Diagram will be used to regulate the downstream release of Hinckley Reservoir waters. The 2012 Operating Diagram establishes the rates (in cubic feet per second) at which water is to be discharged from Hinckley Reservoir on a semiweekly basis. The downstream discharge established by the 2012 Operating Diagram reduces as the reservoir level recedes in order to maintain sufficient water in Hinckley Reservoir to maintain canal navigation and other uses. The Operating Diagram also provides for increased reservoir releases as the reservoir level increases to help mitigate downstream flood concerns.
Current Hinckley Levels
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Current Hinckley Levels
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 Data
- 2018 Data
- 2019 Data
- 2020 Data
- 2021 Data
- 2022 Data
- 2023 Data
| 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 Operation 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) |
|---|---|---|---|---|---|---|---|---|---|---|
| 01-19 | 1208.9 | 1208.9 | -0.4 | 904 | 900 | 344 | 770 | -999999 | -999999 | N/A |
| 01-18 | 1209.5 | 1209.5 | 0.1 | 900 | 900 | 406 | 804 | -999999 | -999999 | 29.9 |
| 01-17 | 1210 | 1210 | 0.3 | 933 | 900 | 332 | 846 | -999999 | -999999 | 29.4 |
| 01-16 | 1210.6 | 1210.6 | 0.8 | 911 | 900 | 328 | 921 | -999999 | -999999 | 31.7 |
| 01-15 | 1211.2 | 1211.2 | 1.1 | 917 | 920 | 300 | 969 | -999999 | -999999 | 30 |
| 01-14 | 1211.8 | 1211.8 | 1.4 | 922 | 920 | 452 | 992 | -999999 | -999999 | 30 |
| 01-13 | 1212.3 | 1212.3 | 1.6 | 924 | 0 | 423 | 1007 | -999999 | -999999 | 31 |
| 01-12 | 1212.8 | 1212.8 | 1.9 | 936 | 940 | 457 | 1038 | -999999 | -999999 | 31.1 |
| 01-11 | 1213.2 | 1213.2 | 2 | 940 | 940 | 455 | 1113 | -999999 | -999999 | 29.4 |
| 01-10 | 1213.7 | 1213.7 | 2.2 | 940 | 940 | 504 | 1279 | -999999 | -999999 | 31.3 |
| 01-09 | 1214.1 | 1214.1 | 2.4 | 940 | 940 | 501 | 1363 | -999999 | -999999 | 32.3 |
| 01-08 | 1214.5 | 1214.5 | 2.6 | 937 | 930 | 576 | 1368 | -999999 | -999999 | 30.1 |
| 01-07 | 1214.9 | 1214.9 | 2.9 | 934 | 930 | 625 | 1364 | -999999 | -999999 | 31.2 |
| 01-06 | 1215.2 | 1215.1 | 2.9 | 930 | 930 | 870 | 1356 | -999999 | -999999 | 31.5 |
| 01-05 | 1215.2 | 1215.3 | 3 | 940 | 850 | 991 | 1339 | -999999 | -999999 | 30.4 |
| 01-04 | 1215.2 | 1215.2 | 2.9 | 857 | 850 | 935 | 1320 | -999999 | -999999 | 30.4 |
| 01-03 | 1215.2 | 1215.1 | 2.8 | 858 | 850 | 1322 | 1303 | N/A | -999999 | 31.3 |
| 01-02 | 1214.8 | 1214.7 | 2.4 | 857 | 850 | 1940 | 1271 | N/A | 439 | 29 |
| 01-01 | 1213.8 | 1213.8 | 1.5 | 895 | 840 | 2272 | 1223 | 1460 | 504 | 31.1 |
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.
Hinckley Reservoir Watershed Map
Hinckley Reservoir Watershed Map
OSWEGO RIVER BASIN
Oswego River Basin
The Oswego River Basin is located in Central New York. It encompasses the Erie Canal from Macedon to Rome and the Cayuga-Seneca and Oswego Canals. It drains a total area of 5,122 square miles into Lake Ontario. The area of the basin is larger than the states of Rhode Island and Delaware combined.
The Canal Corporation's Syracuse Division Canal Office is responsible for maintaining water levels of the Canal System within the Oswego River Basin for navigational purposes.
Current Oswego Basin Levels
Current Oswego Basin Levels
Oswego Basin Rule Curves
Oswego Basin Rule Curves
Minimizing Flood Damage
Lake-level regulation efforts are aimed at minimizing flood damage within the entire Oswego River Basin. Typically, following the navigation season, the system's water levels are lowered to provide storage for spring snowmelt and storm runoff. Prior to navigation season, water levels are raised gradually to predetermined safe levels for summer use. In the summer, levels are regulated to provide reserve capacity sufficient to contain moderate runoff. Seasonal lake levels and other important factors such as maximum and minimum navigation levels are indicated on graphs called "rule curves" that depict ideal levels for each lake.
- High Water Levels - Flood
- Water Supply for all uses
- Drinking water
- Sewage plants
- Critical Habitat
- Navigation
- Irrigation
- Low Water Levels - Flood Mitigation
- No Water
- No Drinking Water
- No Navigation
- Severe Damage to Critical Habitat
Rule curves are the historical compromise for water level management that have been established to balance competing interests for target water levels. The rule curve process starts by establishing the top and bottom of the curves (highest tolerable level, lowest tolerable level) to avoid at all costs severe flooding or severe drought conditions. Within that range, navigation levels and municipal water supply are given the highest priorities to ensure a stable, reliable water supply throughout low water summer months. Critical habitat concerns also drive target levels toward the high side of the range to ensure against damage to delicate natural resources.
In order to avoid floods, demand for high levels must be balanced against the effects on property owners. Typically, floods are brought on by:
- Rapid spring snowmelt/runoff
- Heavy spring rains/heavy runoff
- Heavy fall rains before the winter freeze.
To deal with these acts of nature, water levels are raised/lowered within tolerable limits by season.
- FALL – At the close of the navigation season, water levels are drawn down for storage capacity anticipating spring runoff.
- WINTER – The lowest water level on the system can be achieved mindful of water supply needs.
- SPRING – Storage capacity is maintained as long as possible to accept heavy runoffs, but gradual system increases must be undertaken to ensure target levels are reached for summer low water condition needs.
- SUMMER – Competing needs must be balanced with the available water supply.
Rule Curves for Eight Lakes in Oswego Basin
Environmental Stewardship
Environmental Stewardship is recognized as one of the primary responsibilities of the Canal Corporation.