The flow through this section is regulated by a flood control dam just upstream from the put-in. There are two weekend releases scheduled for the last two weekends in April. Control releases are approximately 600-900 cfs. The river is runnable at other times, see below for a general idea of when the river can be run. USGS gage located 1.5 miles downstream on river left above a small class II drop.
Estimated chance (%) of finding the river runnable.
Month............% chance......comment January ............ 5%........Frozen. February............ 5%........Frozen. March...............50%........Ice shelves wash out late in the month. April...............90%........Most dependable month. May ................40%........Flows start dropping back with leaf out. June................15% July................ 5% August.............. 5%........Lowest water month September...........10% October.............30% November............40%........Fall rains, dormant trees December............30%........River starts freezing around Christmas.
Be aware this is averaged out over several years. The % chance refers to the probability of finding the river running on any given day. For instance a 5% probability for August means on average you can only expect about 1-1/2 days of water. One year there could be 3 days in August with water, other years none. Spring levels are usually higher than fall levels. Also be aware that the river is regulated depending on expected precipitation. Drawdowns may precede a major storm in order to allow more storage capacity. At other times the dam may hold back after a major storm to prevent flooding downstream.
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Note: The April 19th thru 20th weekend is the date for the 25th annual New England series whitewater slalom to be held at the put-in. Please put in below the race course.
| Name | Range | Difficulty | Updated | Level | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Blackwater-Route 127 to Snyder's Mill | ||||||||||||
| river-1163 | 400 - 1800 cfs | II-IV | cfs | |||||||||
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| When | River/Gauge | Subject | Level | Reporter |
|---|---|---|---|---|
| Blackwater [NH] |
Clothespin - Blackwater |
n/a | Cheryl Robinson | |
| Blackwater [NH] |
Just below Blackwater dam |
800 cfs | Mark Lacroix | |
| > 10 years | Blackwater [NH] |
Finale Ledge drop at Eggbeater Rapid |
1100 cfs | Mark Lacroix |