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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)
10/18 1201.0 3.0 -9.0 272 420 277 191.0 N/A N/A N/A 537.5 183 11
10/17 1201.0 3.0 -8.8 0 420 25 185.0 N/A N/A 29.4 537.5 186 11
10/16 1201.0 3.0 -8.8 0 420 64 187.0 N/A N/A 29.3 537.5 186 11
10/15 1201.0 3.0 -8.8 272 420 297 190.0 N/A N/A 30.6 537.6 183 11
10/14 1201.0 2.8 -8.8 271 420 316 183.0 N/A N/A 31.0 537.6 186 11
10/13 1201.0 2.6 -8.8 272 420 238 178.0 N/A N/A 30.2 537.7 186 11
10/12 1201.0 2.5 -8.9 272 420 258 173.0 N/A N/A 29.8 537.7 183 11
10/11 1201.1 2.4 -8.9 272 420 277 168.0 N/A N/A 29.8 537.8 186 11
10/10 1201.1 2.2 -8.9 272 420 238 162.0 N/A N/A 30.8 537.8 183 11
10/09 1201.2 2.0 -8.8 272 420 297 157.0 N/A N/A 31.9 537.9 183 11
10/08 1201.2 2.0 -8.8 273 420 219 150.0 N/A N/A 31.3 538.0 186 11
10/07 1201.3 1.9 -8.7 273 420 159 146.0 N/A N/A 31.1 538.0 186 11
10/06 1201.4 1.8 -8.6 274 420 199 145.0 N/A N/A 32.7 538.1 186 11
10/05 1201.6 1.8 -8.6 274 420 179 141.0 N/A N/A 31.6 538.2 186 11
10/04 1201.7 1.8 -8.6 275 400 220 143.0 N/A N/A 29.9 538.3 186 11
10/03 1201.8 1.7 -8.6 275 400 300 141.0 N/A N/A 31.2 538.5 186 11
10/02 1201.8 1.5 -8.7 275 400 340 136.0 N/A N/A 31.1 538.5 186 11
10/01 1201.8 1.3 -8.7 274 400 520 130.0 N/A N/A 31.2 538.6 186 11
09/30 1201.5 0.9 -9.1 274 400 262 117.0 N/A N/A 31.2 538.7 186 11
09/29 1201.5 0.8 -9.1 274 400 122 114.0 N/A N/A 31.2 538.6 186 11
09/28 1201.8 0.8 -8.8 264 400 111 117.0 N/A N/A 31.7 538.7 186 11
09/27 1202.0 0.8 -8.5 265 400 90 121.0 N/A N/A 30.5 538.9 186 11
09/26 1202.2 0.8 -8.2 266 400 49 125.0 N/A N/A 32.2 539.0 186 11
09/25 1202.5 1.0 -8.1 267 400 131 128.0 N/A N/A 31.6 539.1 186 11
09/24 1202.7 1.0 -8.0 276 400 77 128.0 N/A N/A 32.3 539.3 186 11
09/23 1203.0 1.1 -7.8 269 400 89 127.0 N/A N/A 32.4 539.4 186 11
09/22 1203.2 1.1 -7.5 270 400 109 125.0 N/A N/A 31.9 539.5 171 11
09/21 1203.4 1.2 -7.3 271 400 109 122.0 N/A N/A 29.6 N/A 171 N/A
09/20 1203.7 1.3 -7.0 272 400 87 120.0 N/A N/A 29.0 N/A 171 N/A
09/19 1203.9 1.4 -6.6 273 400 87 117.0 N/A N/A 30.2 N/A 171 N/A
09/18 1204.2 1.4 -6.4 274 400 108 116.0 N/A N/A 30.5 N/A 173 N/A
09/17 1204.4 1.5 -6.3 275 400 86 117.0 N/A N/A 31.6 540.1 173 11
09/16 1204.6 1.5 -6.1 276 400 129 117.0 N/A N/A 30.5 540.2 173 11
09/15 1204.8 1.5 -6.0 276 400 107 117.0 N/A N/A 29.3 540.3 173 11
09/14 1205.0 1.5 -5.9 254 400 150 117.0 N/A N/A 29.7 540.4 166 11
09/13 1205.2 1.6 -5.7 254 400 106 119.0 N/A N/A 29.7 540.4 166 11
09/12 1205.4 1.6 -5.5 254 400 105 121.0 N/A N/A 30.7 540.4 166 11
09/11 1205.6 1.6 -5.5 255 400 82 124.0 N/A N/A 32.4 540.6 171 11
09/10 1205.8 1.6 -5.5 256 400 82 128.0 N/A N/A 32.3 540.7 191 11
09/09 1206.0 1.6 -5.5 257 400 104 128.0 N/A N/A 32.7 N/A N/A N/A
09/08 1206.2 1.7 -5.6 257 400 104 128.0 N/A N/A 31.2 540.9 193 11
09/07 1206.4 1.7 -5.6 258 400 127 132.0 N/A N/A 28.3 541.1 193 11
09/06 1206.6 1.7 -5.6 259 400 81 135.0 N/A N/A 29.8 541.2 193 11
09/05 1206.8 1.6 -5.7 259 400 218 145.0 N/A N/A 30.0 541.3 193 11
09/04 1206.9 1.7 -5.7 260 400 173 156.0 N/A N/A 31.3 541.4 193 11
09/03 1207.0 1.6 -5.7 260 400 150 181.0 N/A N/A 30.8 541.5 193 11
09/02 1207.1 1.5 -5.8 261 400 173 183.0 N/A N/A 31.4 541.6 193 23
09/01 1207.2 1.5 -5.7 261 400 126 182.0 N/A N/A 30.9 541.7 193 23
08/31 1207.4 1.5 -5.6 265 400 159 180.0 N/A N/A 29.6 541.9 196 23
08/30 1207.6 4.5 -5.5 274 400 214 176.0 N/A N/A 30.8 542.0 196 23
08/29 1207.7 4.4 -5.6 275 400 239 173.0 N/A N/A 32.7 542.1 196 23
08/28 1207.7 1.2 -5.6 183 400 194 168.0 N/A N/A 37.0 542.2 196 23
08/27 1207.8 1.1 -5.9 272 400 141 166.0 N/A N/A 32.6 542.3 196 23
08/26 1207.9 1.1 -5.9 241 400 134 166.0 N/A N/A 29.2 542.4 196 23
08/25 1208.1 1.1 -6.0 251 400 48 167.0 N/A N/A 29.2 542.5 196 N/A
08/24 1208.3 1.1 -6.0 252 400 24 170.0 83 11 27.8 542.6 196 N/A
08/23 1208.6 1.2 -5.8 240 400 34 175.0 80 12 30.0 542.7 196 N/A
08/22 1208.8 1.3 -5.7 241 400 35 180.0 71 10 29.0 542.9 196 N/A
08/21 1209.1 1.4 -5.6 266 400 8 187.0 66 11 29.1 543.0 196 N/A
08/20 1209.4 1.5 -5.5 267 400 56 194.0 72 12 28.7 543.1 198 N/A
08/19 1209.6 1.5 -5.5 257 400 141 199.0 76 13 29.0 N/A N/A N/A
08/18 1209.8 1.6 -5.5 291 400 84 204.0 82 13 29.3 543.3 198 N/A
08/17 1210.0 1.6 -5.5 229 400 114 214.0 86 14 29.0 543.4 198 N/A
08/16 1210.2 1.6 -5.5 271 400 106 230.0 95 14 25.8 543.6 196 N/A
08/15 1210.4 1.6 -5.5 364 400 221 246.0 111 16 28.0 543.7 196 N/A
08/14 1210.5 1.6 -5.5 248 400 181 246.0 135 18 30.6 543.8 196 N/A
08/13 1210.6 1.5 -5.5 262 400 170 249.0 159 19 28.5 543.9 198 N/A
08/12 1210.8 1.5 -5.5 252 400 211 254.0 173 22 28.9 544.0 198 N/A
08/11 1210.8 1.4 -5.4 256 400 88 265.0 104 20 27.8 544.0 196 N/A
08/10 1211.0 1.4 -5.4 253 400 110 282.0 114 22 29.1 544.1 198 N/A
08/09 1211.2 1.4 -5.3 300 400 207 285.0 135 26 28.3 544.2 198 N/A
08/08 1211.3 1.3 -5.4 301 400 233 284.0 172 33 27.5 544.3 198 N/A
08/07 1211.4 1.2 -5.4 161 400 374 278.0 249 46 27.2 544.4 198 N/A
08/06 1211.2 0.9 -5.7 258 400 545 269.0 425 87 27.2 544.5 198 N/A
08/05 1211.0 0.5 -6.1 249 400 936 254.0 835 212 28.3 544.5 201 N/A
08/04 1210.4 -0.4 -6.9 254 400 213 228.0 150 60 28.5 544.4 198 N/A
08/03 1210.4 -0.5 -7.0 264 400 123 226.0 74 16 27.2 544.5 198 N/A
08/02 1210.6 -0.5 -6.9 247 400 79 230.0 72 16 27.0 544.6 198 N/A
08/01 1210.8 -0.4 -6.9 260 400 41 239.0 73 16 27.5 544.7 198 N/A
07/31 1211.0 -0.4 -6.7 261 400 117 253.0 81 18 27.8 544.8 198 N/A
07/30 1211.2 -0.4 -6.7 261 400 91 258.0 92 21 28.5 544.9 231 N/A
07/29 1211.4 -0.4 -6.6 262 400 117 262.0 111 22 30.7 545.0 234 N/A
07/28 1211.6 -0.3 -6.5 262 400 168 264.0 109 24 30.0 545.1 234 N/A
07/27 1211.7 -0.4 -6.6 263 400 143 263.0 88 20 29.8 545.2 186 N/A
07/26 1211.8 -0.4 -6.6 263 400 142 263.0 95 19 30.4 545.3 186 N/A
07/25 1212.0 -0.5 -6.6 264 400 169 264.0 116 22 30.0 545.4 186 N/A
07/24 1212.1 -0.4 -6.5 264 400 194 262.0 161 25 28.4 545.5 181 N/A
07/23 1212.2 -0.6 -6.7 264 400 246 263.0 163 27 27.9 545.5 181 N/A
07/22 1212.3 -0.8 -6.8 264 400 220 256.0 119 26 31.0 545.5 181 N/A
07/21 1212.3 -0.9 -6.8 265 400 198 256.0 143 31 30.9 545.6 181 N/A
07/20 1212.4 -1.0 -6.8 265 400 296 252.0 188 38 29.9 545.7 181 N/A
07/19 1212.4 -1.1 -7.0 265 400 377 246.0 261 44 30.3 N/A 181 N/A
07/18 1212.4 -1.3 -7.2 264 400 610 236.0 456 75 28.2 N/A 183 N/A
07/17 1212.1 -1.8 -7.7 263 400 582 222.0 564 95 28.9 545.6 191 N/A
07/16 1211.8 -2.3 -8.1 263 400 220 210.0 147 32 29.4 545.4 181 N/A
07/15 1211.9 -2.4 -8.2 263 400 271 207.0 164 37 28.4 545.5 181 N/A
07/14 1211.9 -2.5 -8.2 263 400 323 206.0 N/A 51 27.8 545.5 181 N/A
07/13 1211.9 -2.7 -8.3 263 400 529 202.0 312 108 28.0 545.5 181 N/A
07/12 1211.6 -3.2 -8.6 262 400 603 195.0 328 191 25.4 545.4 186 N/A
07/11 1211.4 -3.5 -8.9 262 400 194 186.0 117 26 28.7 545.1 181 N/A
07/10 1211.5 -3.7 -9.1 262 400 168 189.0 85 16 31.0 545.2 181 N/A
07/09 1211.6 -3.7 -9.0 263 400 65 192.0 91 17 32.4 545.3 181 N/A
07/08 1211.8 -3.7 -9.0 263 400 90 197.0 81 18 31.1 545.3 181 N/A
07/07 1212.0 -3.7 -9.1 264 400 116 202.0 88 19 32.2 545.4 181 N/A
07/06 1212.2 -3.6 -8.9 264 400 142 207.0 98 23 31.0 545.5 181 N/A
07/05 1212.3 -3.7 -8.9 265 400 168 213.0 116 29 28.0 545.6 181 N/A
07/04 1212.4 -3.8 -8.9 265 400 247 220.0 145 43 27.4 545.6 181 N/A
07/03 1212.5 -3.9 -8.9 265 400 351 222.0 195 73 28.6 545.7 181 N/A
07/02 1212.4 -4.1 -9.2 265 400 455 224.0 226 159 28.8 545.8 181 N/A
07/01 1212.3 -4.4 -9.4 264 400 272 217.0 211 102 28.8 545.8 181 N/A
06/30 1212.3 -4.6 -9.6 257 400 188 221.0 103 39 29.2 545.8 183 N/A
06/29 1212.4 -4.7 -9.6 252 400 182 232.0 94 93 28.4 545.9 183 N/A
06/28 1212.5 -4.7 -9.7 252 400 156 247.0 92 37 26.9 546.0 183 N/A
06/27 1212.6 -4.8 -9.6 252 400 129 256.0 93 16 28.8 546.0 183 N/A
06/26 1212.8 -4.9 -9.6 253 400 183 262.0 102 18 30.2 546.1 183 N/A
06/25 1212.8 -5.0 -9.6 253 400 103 267.0 111 20 29.2 546.2 183 N/A
06/24 1213.0 -4.9 -9.5 253 400 209 281.0 97 20 31.5 546.3 183 N/A
06/23 1213.1 -5.0 -9.6 254 400 50 291.0 85 14 34.1 546.4 183 0
06/22 1213.3 -5.0 -9.4 254 400 209 307.0 88 15 31.9 546.5 183 0
06/21 1213.4 -5.1 -9.3 255 400 76 319.0 94 16 29.5 546.6 183 0
06/20 1213.6 -5.0 -9.3 255 400 129 342.0 99 18 28.9 546.6 183 0
06/19 1213.7 -5.0 -9.2 371 400 83 363.0 105 21 31.6 546.7 183 0
NY Power Authority Comments : Per directive from the Canal Corporation, at 7 PM Friday, June 19th, the Hinckley Reservoir release rate was reduced from the Hinckley Reservoir Operating Diagram release rate of 400 cfs to 250 cfs.
06/18 1214.0 -5.0 -9.2 405 400 169 394.0 115 19 32.1 546.8 183 0
06/17 1214.3 -4.9 -9.0 412 400 229 433.0 127 20 31.6 546.9 183 0
06/16 1214.5 -4.9 -8.8 408 400 142 473.0 139 23 30.6 547.0 183 0
06/15 1214.7 -4.8 -8.6 405 400 220 513.0 151 25 28.3 547.0 183 0
06/14 1214.9 -4.8 -8.4 467 460 226 587.0 164 28 26.8 547.1 186 0
06/13 1215.2 -4.7 -8.2 460 460 301 591.0 193 34 26.5 N/A N/A N/A
06/12 1215.3 -4.8 -8.2 463 460 357 602.0 257 48 27.4 N/A N/A N/A
06/11 1215.5 -4.7 -8.1 457 460 268 610.0 230 53 30.3 547.4 186 0
06/10 1215.7 -4.8 -8.1 493 490 248 625.0 149 28 31.0 547.5 186 0
06/09 1215.9 -4.7 -7.9 493 490 218 638.0 163 27 29.3 547.6 188 0
06/08 1216.2 -4.6 -7.6 533 490 257 650.0 178 29 28.5 547.7 188 0
06/07 1216.4 -4.4 -7.4 510 510 260 660.0 200 34 27.1 547.8 188 0
06/06 1216.7 -4.4 -7.3 509 510 315 671.0 229 40 29.2 547.9 188 0
06/05 1216.9 -4.4 -7.2 518 510 380 682.0 250 45 30.6 547.9 188 0
06/04 1217.0 -4.5 -7.2 514 510 319 693.0 260 50 28.6 548.0 188 0
06/03 1217.2 -4.4 -7.1 527 520 389 709.0 271 53 27.8 548.1 188 0
06/02 1217.4 -4.4 -6.8 400 520 244 730.0 282 42 27.1 548.1 188 0
06/01 1217.5 -4.5 -6.7 472 520 391 762.0 320 51 27.0 548.2 188 0
05/31 1217.6 -4.4 -6.6 562 550 536 800.0 401 77 27.4 548.3 188 0
05/30 1217.7 -4.4 -6.6 594 550 626 826.0 487 132 28.4 548.3 191 0
05/29 1217.7 -4.3 -6.5 557 550 414 835.0 272 44 28.8 548.2 193 0
05/28 1217.8 -4.2 -6.5 553 550 322 854.0 276 37 32.4 548.2 192 0
05/27 1218.0 -4.0 -6.3 624 620 333 886.0 304 42 30.9 548.3 192 0
05/26 1218.3 -3.8 -6.0 539 620 512 915.0 340 49 29.8 N/A N/A N/A
05/25 1218.3 -3.7 -6.1 624 620 509 925.0 358 55 29.4 548.4 241 0
05/24 1218.5 -3.6 -6.0 663 670 547 934.0 399 66 31.0 548.5 241 0
05/23 1218.6 -3.4 -5.8 665 670 579 943.0 461 81 30.8 548.6 241 0
05/22 1218.7 -3.3 -5.7 666 670 758 956.0 533 96 30.4 548.6 248 0
05/21 1218.6 -3.3 -5.8 668 670 759 966.0 636 120 30.5 548.7 248 0
05/20 1218.6 -3.4 -5.9 727 720 996 977.0 798 167 29.8 548.7 259 0
05/19 1218.4 -3.6 -6.1 728 720 1348 986.0 1040 249 27.8 548.7 266 0
05/18 1217.9 -4.1 -6.6 722 720 1423 976.0 1110 302 27.8 548.5 747 0
05/17 1217.3 -4.7 -7.2 813 800 1364 967.0 1010 265 26.6 548.7 707 0
05/16 1216.9 -5.1 -7.6 1161 800 2413 964.0 1330 555 25.8 N/A 724 0
NY Power Authority Comments : Saturday afternoon, the line outage was resolved and the Hinckley outflows returned to the scheduled release through Jarvis turbines at approximately 16:45.
05/15 1215.8 -6.2 -8.8 420 800 368 944.0 511 139 28.2 548.7 255 0
NY Power Authority Comments : Friday afternoon there was a line outage associated with the high winds/thunderstorms that moved through region, impacting NYPA’s Jarvis project and Brookfield’s Prospect and Trenton Falls projects, as a result the Canal Corporation authorized a release rate of 400 cfs until the line outage is resolved.
05/14 1215.9 -6.1 -8.7 807 800 616 1024.0 N/A 66 28.2 548.8 255 0
05/13 1216.1 -5.9 -8.4 953 950 617 1164.0 N/A 79 27.4 548.8 690 0
05/12 1216.4 -5.6 -8.0 951 950 698 1215.0 591 96 27.4 549.2 421 0
05/11 1216.7 -5.4 -7.8 955 950 643 1236.0 N/A 78 26.4 549.3 231 0
05/10 1217.0 -5.0 -7.3 1085 1080 568 1260.0 460 71 25.6 549.3 231 0
05/09 1217.4 -4.6 -6.8 1087 1080 562 1309.0 475 73 26.0 549.3 231 0
05/08 1217.9 -4.1 -6.4 1088 1080 592 1360.0 N/A 76 28.1 549.4 231 0
05/07 1218.3 -3.7 -6.0 1083 1080 642 1404.0 545 77 27.0 549.4 231 0
05/06 1218.7 -3.3 -5.7 1209 1210 704 1443.0 624 86 27.8 549.4 231 0
05/05 1219.2 -2.8 -5.2 1215 1210 826 1489.0 739 101 27.4 549.4 231 0
05/04 1219.5 -2.5 -4.9 1210 1210 1000 1538.0 892 119 27.1 N/A N/A N/A
05/03 1219.7 -2.3 -4.7 1380 1380 1200 1574.0 1090 156 26.0 549.4 238 0
05/02 1219.9 -2.1 -4.4 1389 1380 1542 1601.0 1340 211 26.6 549.3 241 0
05/01 1219.8 -2.2 -4.3 1384 1380 1325 1625.0 1210 213 26.9 549.1 925 0
04/30 1219.9 N/A -4.0 1711 1380 882 1759.0 856 122 26.3 549.3 1050 0
NY Power Authority Comments : The Canal Corporation has directed the operation of Hinckley Reservoir to revert to the 2012 Hinckley Reservoir Operating Diagram, effective 4/30 at 19:00.
04/29 1220.5 N/A -3.3 1804 1400 996 1851.0 964 157 28.7 549.8 673 0
04/28 1221.2 N/A -2.4 1560 1400 1275 1918.0 1100 217 25.7 550.1 309 0
NY Power Authority Comments : The Canal Corporation has directed NYPA to increase the Hinckley Reservoir release rate from 1,400 cfs, as specified by the Hinckley Reservoir Operating Diagram, to 1,800 cfs until further notice to minimize the reservoir rise this week, which took effect 4/28 at 1500 hours.
04/27 1221.4 N/A -2.0 1404 1400 1211 1935.0 1040 241 27.7 550.0 278 0
04/26 1221.6 N/A -1.6 1401 1400 797 1948.0 672 99 26.8 550.0 252 0
04/25 1222.1 N/A -0.7 1399 1400 791 1964.0 673 104 27.5 550.0 N/A 0
04/24 1222.6 N/A 0.2 1400 1400 818 1972.0 728 119 27.7 550.0 289 0
04/23 1223.1 N/A 1.3 1436 1400 946 1980.0 803 136 27.8 550.1 313 0
04/22 1223.4 N/A 2.4 1490 1510 1061 1995.0 948 171 28.6 550.1 360 0
04/21 1223.8 N/A 3.5 1507 1510 1109 2020.0 962 180 27.1 550.2 392 0
04/20 1224.1 N/A 4.3 1513 1510 1244 2081.0 1020 207 28.0 550.2 421 0
04/19 1224.3 N/A 5.2 1544 1540 1076 2211.0 910 185 25.5 550.1 356 0
04/18 1224.7 N/A 5.9 1543 1540 1138 2257.0 1020 204 27.4 550.1 356 0
04/17 1225.0 N/A 6.8 1728 1540 1284 2258.0 1190 222 26.8 550.1 309 0
NY Power Authority Comments : The Canal Corporation authorized a return to the Operating Diagram release rate of 1,540 cfs Friday 4/17, which took effect at 10 AM.
04/16 1225.4 N/A 8.0 2344 1540 1799 2245.0 1500 265 27.8 550.0 266 0
04/15 1225.8 N/A 9.4 3114 1400 2768 2224.0 2170 427 26.7 549.9 205 0
04/14 1226.0 N/A 10.4 2418 1400 4817 2189.0 4000 703 26.6 549.6 526 0
04/13 1224.3 N/A 9.4 1786 1400 2141 2116.0 2040 330 28.0 548.9 509 0
04/12 1224.1 N/A 9.8 1797 1400 1331 2196.0 1230 213 25.6 548.9 498 0
04/11 1224.4 N/A 10.9 1298 1400 1358 2256.0 1560 270 24.6 549.0 498 0
04/10 1224.4 N/A 11.6 1213 1400 2060 2303.0 2130 366 22.7 548.9 493 0
04/09 1223.8 N/A 11.5 1553 1400 2094 2459.0 1840 284 24.3 548.9 186 0
NY Power Authority Comments : The Canal Corporation has directed NYPA to increase the Hinckley Reservoir release rate from 1,400 cfs, as specified by the Hinckley Reservoir Operating Diagram, to 1,800 cfs. The increase took effect 4/9 at 13:25 O'clock.
04/08 1223.4 N/A 11.7 1410 1400 1889 2438.0 1630 237 26.5 548.8 186 0
04/07 1223.1 N/A 12.2 1406 1400 1818 2387.0 1580 224 29.2 548.7 186 0
04/06 1222.8 N/A 12.7 1410 1400 2074 2356.0 1780 268 28.1 548.6 169 0
04/05 1222.3 N/A 13.0 1407 1400 2317 2322.0 1870 305 26.4 548.5 172 0
04/04 1221.6 N/A 13.4 1408 1400 2059 2205.0 1690 318 27.2 548.3 175 0
04/03 1221.1 N/A 14.0 1409 1400 2024 2201.0 1640 327 27.7 548.1 175 0
04/02 1220.6 N/A 14.4 1407 1400 2261 2192.0 1730 381 27.4 547.9 175 0
04/01 1220.0 N/A 14.7 1407 1400 5339 2148.0 2070 565 27.7 547.6 208 0
03/31 1218.7 N/A 14.3 1410 1400 3650 1969.0 2450 739 24.3 547.3 411 0
03/30 1216.8 N/A 13.4 1412 1400 3018 1875.0 2130 N/A 25.7 546.4 397 0
03/29 1215.5 N/A 12.8 1406 1400 1786 1805.0 1340 380 25.4 546.1 397 0
03/28 1215.2 N/A 13.4 1404 1400 1593 1770.0 1250 297 23.2 546.0 397 0
03/27 1215.1 N/A 14.0 1401 1400 1285 1741.0 1070 260 N/A 545.8 402 0
03/26 1215.2 N/A 14.6 1402 1400 1008 1713.0 859 195 N/A 545.5 397 0
03/25 1215.6 N/A 15.4 1405 1400 1064 1691.0 972 202 28.1 545.5 392 0
03/24 1215.9 N/A 15.9 1406 1400 1401 1664.0 1140 236 27.4 545.5 753 0
03/23 1215.9 N/A 16.0 1403 1400 1818 1626.0 1370 293 28.8 545.6 788 0
03/22 1215.6 N/A 15.8 1740 1400 2923 1577.0 1860 525 27.2 545.8 794 0
03/21 1214.5 N/A 14.9 1813 1400 5143 1491.0 3310 888 26.2 545.9 1560 0
03/20 1211.5 N/A 12.1 1808 1400 2466 1333.0 1960 603 27.9 545.7 1570 0
03/19 1210.9 N/A 11.4 2400 1400 1170 1267.0 868 209 27.0 546.1 1550 0
03/18 1212.1 N/A 12.8 2433 1400 903 1240.0 916 196 29.8 546.9 1560 0
03/17 1213.5 N/A 14.4 2065 1400 1171 1223.0 1090 226 26.3 547.6 1560 0
NY Power Authority Comments : The Canal Corporation has directed NYPA to increase the Hinckley Reservoir release rate from 1,400 cfs, as specified by the Hinckley Reservoir Operating Diagram, to 2,500 cfs to minimize the reservoir rise this week. This adjustment will be accomplished by maximizing generation (1,800 cfs) with 700 cfs of discharge through the outlet No. 4 valve. The deviation went into effect Tuesday, 3/17 at 9 AM.
03/16 1214.3 N/A 15.2 1402 1400 1696 1196.0 1310 282 27.9 548.3 1580 0
03/15 1214.1 N/A 15.1 1078 1070 2648 1150.0 1750 454 28.8 549.0 1600 0
03/14 1212.7 N/A 13.9 1083 1070 4526 1074.0 2820 774 28.3 549.4 1600 0
03/13 1209.4 N/A 10.7 1078 1070 3147 938.0 2270 568 29.0 549.2 1590 0
03/12 1207.3 N/A 8.7 1072 1070 2752 819.0 1750 528 29.9 549.5 1570 0
03/11 1205.5 N/A 6.8 886 890 6747 761.0 2500 742 27.9 549.7 313 0
03/10 1198.4 N/A -0.3 902 890 1465 568.0 1150 350 15.1 N/A 305 0
03/09 1197.7 N/A -1.0 889 890 354 538.0 658 203 24.1 N/A 278 0
03/08 1198.5 N/A -0.2 730 720 886 549.0 700 211 22.4 N/A 274 0
03/07 1198.3 N/A -0.4 727 720 1056 540.0 848 266 19.2 N/A 278 0
03/06 1197.9 N/A -0.6 729 720 -1203 520.0 1070 389 18.6 N/A 289 0
03/05 1200.4 N/A 1.9 728 720 1961 572.0 1350 558 20.2 N/A 301 0
03/04 1198.9 N/A 0.1 769 760 1751 519.0 1260 596 20.3 N/A 321 0
03/03 1197.6 N/A -1.5 762 760 944 475.0 485 274 19.7 N/A 274 0
03/02 1197.4 N/A -2.0 762 760 -35 457.0 364 200 19.7 N/A 263 0
03/01 1198.5 N/A -1.1 797 800 820 472.0 394 212 18.4 N/A 263 0
02/29 1198.5 N/A -1.2 795 800 906 459.0 424 249 18.1 N/A 266 0
02/28 1198.4 N/A -1.4 803 800 754 442.0 490 322 18.8 N/A 282 0
02/27 1198.5 N/A -1.4 800 800 715 434.0 446 305 17.7 N/A 297 0
02/26 1198.6 N/A -1.5 861 860 460 431.0 326 176 33.4 N/A 259 0
02/25 1199.2 N/A -1.2 834 860 330 439.0 294 142 34.5 N/A 252 0
02/24 1199.8 N/A -0.8 867 860 257 452.0 271 114 36.5 N/A 248 0
02/23 1200.6 N/A -0.1 888 890 263 463.0 N/A N/A 33.8 N/A 248 0
02/22 1201.4 N/A 0.6 889 890 350 473.0 361 116 32.5 N/A 252 0
02/21 1202.1 N/A 1.0 890 890 341 479.0 328 129 34.8 N/A 252 0
02/20 1202.8 N/A 1.3 892 890 416 490.0 327 160 35.0 N/A 252 0
02/19 1203.4 N/A 1.6 934 930 472 495.0 334 182 34.8 N/A 252 0
02/18 1204.0 N/A 2.0 933 930 354 501.0 287 106 28.5 N/A 252 0
02/17 1204.6 N/A 2.5 937 930 414 515.0 306 104 30.2 N/A 248 0
02/16 1205.2 N/A 2.9 980 970 336 526.0 335 114 28.6 N/A 252 0
02/15 1206.0 N/A 3.3 976 970 319 541.0 329 109 24.1 N/A 252 0
02/14 1206.7 N/A 3.6 975 970 376 575.0 315 117 29.3 N/A 248 0
02/13 1207.4 N/A 3.9 974 970 459 622.0 344 133 27.3 542.8 252 0
02/12 1207.9 N/A 4.1 973 970 -448 701.0 363 141 18.9 542.8 252 0
02/11 1209.5 N/A 5.3 977 970 1013 900.0 398 164 26.3 542.8 255 0
02/10 1209.5 N/A 4.9 978 970 977 1102.0 432 161 26.3 542.7 255 0
02/09 1209.5 N/A 4.5 996 990 552 1047.0 467 185 24.0 542.7 255 N/A
02/08 1210.0 N/A 4.6 999 990 700 1023.0 580 237 25.5 542.7 255 N/A
02/07 1210.3 N/A 4.5 986 990 609 1008.0 434 174 24.1 542.7 259 N/A
02/06 1210.7 N/A 4.6 1090 990 460 1011.0 307 N/A 24.9 N/A N/A N/A
02/05 1211.2 N/A 4.8 1025 1020 357 1027.0 309 74 27.5 542.6 252 N/A
02/04 1211.9 N/A 5.2 1025 1020 373 1054.0 319 74 28.4 542.7 252 N/A
02/03 1212.5 N/A 5.6 1020 1020 412 1100.0 328 76 35.0 N/A N/A N/A
02/02 1213.1 N/A 6.0 1061 1050 418 1125.0 338 80 28.4 542.8 252 N/A
02/01 1213.7 N/A 6.4 1055 1050 403 1138.0 359 85 28.4 542.8 252 N/A
01/31 1214.3 N/A 6.7 1058 1050 424 1150.0 395 90 28.4 542.8 252 N/A
01/30 1214.9 N/A 7.0 1052 1050 410 1172.0 377 94 12.0 542.8 252 N/A
01/29 1215.5 N/A 7.4 1067 1060 502 1209.0 367 112 28.4 N/A N/A N/A
01/28 1216.0 N/A 7.7 1066 1060 636 1240.0 410 141 27.7 543.5 255 N/A
01/27 1216.4 N/A 8.0 1063 1060 687 1248.0 454 179 29.3 525.1 259 N/A
01/26 1216.8 N/A 8.3 1086 1080 736 1256.0 490 208 26.8 N/A 259 N/A
01/25 1217.1 N/A 8.5 1081 1080 584 1251.0 426 123 29.2 N/A 248 N/A
01/24 1217.5 N/A 8.8 1080 1080 549 1253.0 449 117 28.6 543.8 248 N/A
01/23 1218.0 N/A 9.4 1083 1080 547 1255.0 445 132 29.4 N/A 252 N/A
01/22 1218.4 N/A 9.8 1095 1090 673 1259.0 496 164 30.4 N/A 252 N/A
01/21 1218.8 N/A 9.9 1134 1090 559 1258.0 455 189 30.2 N/A 255 N/A
01/20 1219.3 N/A 10.2 1096 1090 667 1264.0 541 213 27.5 542.5 259 N/A
01/19 1219.7 N/A 10.3 1044 1040 764 1264.0 636 234 26.9 542.5 266 N/A
01/18 1219.9 N/A 10.5 1046 1040 734 1262.0 553 200 37.7 542.5 270 N/A
01/17 1220.2 N/A 10.5 1059 1040 806 1263.0 673 159 29.5 542.5 263 N/A
01/16 1220.4 N/A 10.5 1046 1040 1314 1277.0 1070 215 29.5 542.5 1300 N/A
01/15 1220.2 N/A 10.1 984 970 1797 1282.0 1360 272 29.3 543.2 1540 N/A
01/14 1219.6 N/A 9.2 983 970 2822 1290.0 1960 462 28.7 543.9 1540 N/A
NY Power Authority Comments : The Hinckley release rate returned to the Operating Diagram release of 970 cfs Tuesday (1/14) morning.
01/13 1218.1 N/A 7.4 1799 970 5519 1306.0 3710 873 28.5 544.6 1540 N/A
01/12 1214.9 N/A 4.0 1482 1000 7078 1182.0 6240 878 26.4 544.5 1560 N/A
NY Power Authority Comments : The Outlet #4 valve and bypass valve were closed Sunday (1/12) at 10:09 as per the Canal Corporation update. The deviation of 1,800 remained in effect through Monday (1/13).
01/11 1209.7 N/A -1.6 1820 1000 -656 992.0 811 228 26.6 543.6 1540 N/A
01/10 1212.1 N/A 0.6 2638 1000 -166 1081.0 -999999 169 28.3 544.4 1520 N/A
01/09 1214.7 N/A 3.0 1755 1000 222 1211.0 462 138 29.2 545.4 955 N/A
NY Power Authority Comments : The Canal Corporation has authorized an increase of the release rate to 3,200 cfs until further notice. On Jan 9, 2020 at 1009, the Outlet #4 valve was opened to 48 inches and the bypass valve was opened.
01/08 1216.0 N/A 4.2 1797 980 710 1315.0 682 136 27.8 545.8 935 N/A
01/07 1217.0 N/A 5.0 1467 980 942 1317.0 810 177 27.6 546.3 940 N/A
NY Power Authority Comments : The scheduled releases for January 7th, January 8th and January 9th, 2020, were increased by 200 cfs in order to "make up" for the deviation from the Operating Diagram that took effect from Nov 18 to Nov 20. Additionally, the Canal Corporation authorized a further deviation to a release rate of 1,800 cfs which took effect on Tuesday, Jan 7th at 1000.
01/06 1217.5 N/A 5.3 989 980 1156 1303.0 986 233 29.6 546.6 940 N/A
01/05 1217.3 N/A 5.0 990 980 1760 1286.0 1280 348 N/A 546.9 950 0
01/04 1216.7 N/A 4.4 992 980 1158 1248.0 928 246 N/A 546.8 347 0
01/03 1216.6 N/A 4.3 988 980 811 1233.0 590 140 N/A 546.6 303 0
01/02 1216.8 N/A 4.5 986 980 780 1229.0 644 180 N/A N/A N/A N/A
01/01 1217.0 N/A 4.6 988 0 1068 1230.0 736 240 N/A 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.