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New Hampshire Department of Environmental Services

Operations Information
List of Specific Station Operations

Current Watershed Operations Information - Sugar, Contoocook, abd Souhegan

Station: Highland Lake above Island Pond

Highland Lake Dam is located at the southern tip of Highland Lake in Stoddard,
approximately 1/4 mile up Shedd Hill Rd. off of Rt. 123.

The following parameters are currently being measured at this site:

Highland Lake Stage (Lake Elevation)
Air Temperature

Summer Operations
The lake level is maintained as close to the full summer recreation level as
possible, as meteorological conditions and minimum flow requirements allow.
Full summer recreation level is 0 on the gage at Highland Lake Dam, which
corresponds to an elevation of 1294.60.

Seasonal Fall Drawdown
Drawdown begins on or near Columbus Day.  The lake is drawn down 3 feet
(elev. 1291.60) below the summer recreation level, and full drawdown is 
generally reached by November or December in most years. The drawdown is
accomplished by removing flashboards and pulling stoplogs at the dam.

Spring Refill
Lake is refilled to the full summer recreation level between March and June
1st as the snowpack melts and spring rains occur.   

Operations at Highland Lake Dam must be coordinated with Island Pond Dam downstream in order to match flows and avoid flooding/draining of either of the impoundments.  

Note: Water levels generally fluctuate in response to precipitation,
snowmelt, drought or other meteorological conditions. Target water levels 
are maintained by the adjustment of flows at the dam in response 
to these conditions.

Related Information

NH Department of Environmental Services | 29 Hazen Drive | PO Box 95 | Concord, NH 03302-0095
(603) 271-3503 | TDD Access: Relay NH 1-800-735-2964 | Hours: M-F, 8am-4pm

copyright 2008. State of New Hampshire