| Hopkinton Dam, Contoocook River | |||||||||
| Drainage Area: | 426 sq. miles | ||||||||
| Channel Capacity: | 7,000 cfs | ||||||||
| Storage at Spillway Crest: | 6.5 in / 70,100 ac-ft | ||||||||
| Normal Pool: | 380 Feet NGVD(Summer), 382 Feet NGVD(Winter) | ||||||||
| Gate Settings for May 16, 2026 10:03 am | Gate 1 | Gate 2 | Gate 3 | Gate 4 | Gate 5 | Gate 6 | Gate 7 | Gate 8 | |
| 3.0 | 3.0 | 3.0 | 3.0 | 7.0 | 7.0 | ||||
| Date Time (Eastern) |
Pool (ft) |
Storage (%) |
Storage (ac-ft) |
Tailwater (ft) |
Flow (cfs) |
Inflow (cfs) |
Precip (in) |
Air Temp (F) |
| May-16 02:15 pm | 386.01 | 3.8 | 2,698 | 23.95 | ||||
| May-16 01:15 pm | 386.02 | 3.8 | 2,706 | 5.82 | 2,997 | 2,442 | 23.95 | 78.8 |
| May-16 12:15 pm | 386.06 | 3.9 | 2,739 | 5.88 | 3,044 | 2,425 | 23.95 | 78.3 |
| May-16 11:15 am | 386.13 | 4.0 | 2,795 | 5.84 | 3,012 | 2,441 | 23.95 | 76.5 |
| May-16 10:15 am | 386.20 | 4.0 | 2,852 | 5.85 | 3,020 | 2,460 | 23.95 | 74.7 |
| May-16 09:15 am | 386.29 | 4.1 | 2,925 | 5.76 | 2,949 | 2,516 | 23.95 | 67.1 |
| May-16 08:15 am | 386.34 | 4.2 | 2,965 | 5.85 | 3,020 | 2,515 | 23.95 | 56.7 |
| May-16 07:15 am | 386.37 | 4.2 | 2,990 | 5.85 | 3,020 | 2,440 | 23.95 | 50.0 |
| May-16 06:15 am | 386.42 | 4.3 | 3,030 | 5.87 | 3,036 | 2,398 | 23.95 | 48.6 |
| May-16 05:15 am | 386.48 | 4.4 | 3,079 | 5.87 | 3,036 | 2,339 | 23.95 | 47.7 |
| May-16 04:15 am | 386.54 | 4.4 | 3,127 | 5.88 | 3,044 | 2,297 | 23.95 | 47.7 |
| May-16 03:15 am | 386.60 | 4.5 | 3,176 | 5.89 | 3,052 | 2,220 | 23.95 | 48.6 |
| May-16 02:15 am | 386.66 | 4.6 | 3,225 | 5.91 | 3,068 | 2,142 | 23.95 | 50.0 |
| May-16 01:15 am | 386.74 | 4.7 | 3,289 | 5.91 | 3,068 | 2,047 | 23.95 | 51.3 |
| May-16 12:15 am | 386.82 | 4.8 | 3,354 | 5.91 | 3,068 | 1,935 | 23.95 | 52.7 |
| May-15 11:15 pm | 386.92 | 4.9 | 3,435 | 5.92 | 3,076 | 1,853 | 23.95 | 54.0 |
| May-15 10:15 pm | 387.01 | 5.0 | 3,508 | 5.94 | 3,092 | 1,716 | 23.95 | 55.8 |
| May-15 09:15 pm | 387.12 | 5.1 | 3,600 | 5.96 | 3,108 | 1,459 | 23.95 | 58.5 |
| May-15 08:15 pm | 387.23 | 5.3 | 3,691 | 5.97 | 3,116 | 1,388 | 23.95 | 62.1 |
| May-15 07:15 pm | 387.37 | 5.4 | 3,807 | 5.96 | 3,108 | 1,417 | 23.95 | 64.4 |
| May-15 06:15 pm | 387.52 | 5.6 | 3,932 | 5.97 | 3,116 | 1,437 | 23.95 | 65.7 |
| May-15 05:15 pm | 387.67 | 5.8 | 4,056 | 5.95 | 3,100 | 1,322 | 23.95 | 68.4 |
| May-15 04:15 pm | 387.84 | 6.0 | 4,197 | 5.91 | 3,068 | 1,343 | 23.95 | 66.6 |
| May-15 03:15 pm | 388.08 | 6.3 | 4,412 | 5.76 | 2,949 | 1,654 | 23.95 | 61.7 |
| May-15 02:15 pm | 388.18 | 6.5 | 4,514 | 5.52 | 2,759 | 1,829 | 23.95 | 59.4 |
| Maximum 24 Hour Drawdown Rate (10 feet/day): 1,360 cfs + Inflow (2,442 cfs) = 3,802 cfs | ||||||||
| Report Generated May 16, 2026 02:23 pm | ||||||||