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New Hampshire Department of Environmental Services

Station:  Crystal Lake (Gilmanton) (CLSNH)


Crystal Lake dam is located at the south end of the lake in Gilmanton.

The following parameter is currently
being measured at this site:

Crystal Lake Stage (Lake Elevation)

Summer Operations
Lake level is maintained at full pond. Full pond is equal to top 
of the spillway at the dam.

Seasonal Fall Drawdown
Stoplogs holding back water in lake are removed after Columbus day.
The lake is normally lowered towards a goal of 3.
During most years, the 3' drawdown is not reached.

Spring Refill
Lake is allowed to return to full pond after ice out, 
usually in Mid-April. This is done by replacing stoplogs at the dam.

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.

This meteorological station is operated and maintained by
the New Hampshire Department of Environmental Services (DES).
Most data relayed by satellite or other telemetry have received
little or no review. Inaccuracies in the data may be present
because of instrument malfunctions or physical changes at the
measurement site, including backwater effects due to ice formation.
Although the data presented herein is intended to be an accurate
representation of actual conditions, it is presented for
informational purposes only and the user is cautioned to use it at
his/her own risk.   

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