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New Hampshire Department of Environmental Services
PUBLIC GOVERNMENT BUSINESS A to Z LIST

Operations Information
List of Specific Station Operations

Current Watershed Operations Information - Winnipesaukee

Station: Winnipesaukee River at Tilton

USGS Name: Winnipesaukee River at Tilton, NH (01081000)
Link to USGS Site

LOCATION 
Latitude 4326'30", Longitude 7135'17" NAD27
This station is located on the Winnipesaukee River in Tilton, just downstream of the
Bridge Street crossing.
Belknap County, New Hampshire , Hydrologic Unit 01070002 

DRAINAGE AREA 
471.00 square miles.

GAGE
Datum of gage is 441.87 feet above sea level NGVD29.

SITE TYPE
Winnipesaukee River Stage / Flow
Precipitation
Air Temperature

OPERATION: 
Record for this site is maintained by the USGS office in New Hampshire.


More information may be obtained from the USGS by using the link at the
top of this page.

OPERATING INFORMATION

Winnipesaukee River in Tilton, Northfield and Franklin:

Water Level and Flow Constraints:
The levels of the Winnipesaukee River through the towns of Tilton and Northfield are
a function of the flows being discharged from dams upstream and from the uncontrolled
runoff into the river channel downstream of the dams.  There are approximately 13
square miles of local drainage area between the outlet of Silver Lake and the
flow-measuring gage in Tilton.  History has shown that though some flooding does
occur for flows up to approximately 3,500 cfs as recorded at the gage in Tilton,
damaging flooding is largely avoided. For flows over 3,500 cfs, significant flooding
of low-lying areas begins to occur.

Drawdown

On or near Columbus Day, a two week shutdown of flows at upstream dams is initiated to
facilitate maintenance in the river reach from Lakeport Dam to the confluence of the
Winnipesaukee and Pemigewasset rivers in Franklin. During these times, a minimum flow
of approximately 50 cfs is maintained in the river reach downstream of the outlet of
Silver Lake, as measured at the stream gage in Tilton.  After the shutdown, discharges
are normally returned to between 250 and 1,200 cfs, depending upon the prevailing
hydrologic conditions being experienced by the watershed and the water levels in
upstream lakes.

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

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