Gauge Information

Gauge Description:

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.

 

2008 Blackwater releases

Date

Time

Flow

Notes
Fri April 18th 11:00am-until water is depleted 700 cfs 25th annual

Blackwater slalom ( if not enough water, release only on Sat and Sun)

Sat April 19th
Sun April 20th

 

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.
 

Report - Reports of Blackwater Route 127 to Snyder's Mill and related gauges

Reports give the public a chance to report on river conditions throughout the country as well as log the history of a river.

Reports

When River/Gauge Subject Level Reporter
Blackwater [NH] Clothespin - Blackwater n/a Cheryl Robinson
Blackwater [NH] Just below Blackwater dam 800 cfs Mark Lacroix
8y244d20h57m Blackwater [NH] Finale Ledge drop at Eggbeater Rapid 1100 cfs Mark Lacroix