ASHUELOT RIVER

RIVER LEVELS
February 16, 2025


TOTAL RIVER DISCHARGE

Total streamflow across the Ashuelot River was last observed at 298 cfs, and is expected to yield approximately 591 acre-ft of water today; about 25% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 1,183 cfs, with recent peaks last observed on 2021-07-20 when daily discharge volume was observed at 11,380 cfs.

Maximum discharge along the river is currently at the Ashuelot River At Hinsdale reporting a streamflow rate of 1,940 cfs. However, the streamgauge with the highest stage along the river is the Ashuelot River Above The Branch with a gauge stage of 65.17 ft. This river is monitored from 5 different streamgauging stations along the Ashuelot River, the highest being situated at an altitude of 810 ft, the Ashuelot River Near Gilsum.

The Ashuelot River is a 64-mile-long river in southwestern New Hampshire. The river flows through several towns, including Ashuelot, Winchester, Hinsdale, and Swanzey. The river's hydrology is largely influenced by the many dams and reservoirs along its length. The two largest reservoirs are the Highland Lake and the Surry Mountain Lake. The river has historically been used for water-powered mills, and today it is used for hydroelectric power generation. Additionally, the river provides opportunities for recreational activities such as fishing, canoeing, and kayaking. The river is also used for agricultural irrigation in some areas. The Ashuelot River is an important natural resource for the region and is home to a variety of fish species, including trout, smallmouth bass, and walleye.

Last Updated 2025-02-16
Discharge Volume 591 ACRE-FT
Streamflow 298.2 cfs
+21.5 cfs (+7.77%)
Percent of Normal 25.2%
Maximum 11,380.0 cfs
2021-07-20
Seasonal Avg 1,183 cfs

YEAR OVER YEAR DISCHARGE (CFS)

Streamflow Conditions
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Ashuelot River Near Gilsum
USGS 01157000
610 cfs 2.35 ft 1.84
Ashuelot River Below Surry Mt Dam
USGS 01158000
52 cfs 5.17 ft 0
Ashuelot River Above The Branch
USGS 01158110
94 cfs 65.17 ft 37.01
Ashuelot River At West Swanzey
USGS 01160350
152 cfs 5.71 ft -2.56
Ashuelot River At Hinsdale
USGS 01161000
1940 cfs 4.4 ft 5.43
History of the River

The Ashuelot River is a tributary of the Connecticut River, approximately 64 miles (103 km) long, in southwestern New Hampshire in the United States. It drains a mountainous area of 425 square miles (1,101 km2), including much of the area known as the Monadnock Region. It is the longest tributary of the Connecticut River within New Hampshire.

       

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