Mansfield Hollow Lake

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Mansfield Hollow Lake

Aerial view. Windham Airport can be seen at the right.
Location Mansfield / Windham, Connecticut
Coordinates 41°45′21″N 72°10′52″W / 41.75583°N 72.18111°W / 41.75583; -72.18111Coordinates: 41°45′21″N 72°10′52″W / 41.75583°N 72.18111°W / 41.75583; -72.18111[1]
Type reservoir
Primary inflows Natchaug River, Fenton River, Mount Hope River
Primary outflows Natchaug River
Basin countries United States
Surface area 440 acres (180 ha)[2]
Max. depth 23 ft (7.0 m)[2]
Water volume 2,260,000,000 cu ft (0.064 km3)[3]
Surface elevation 256 ft (78 m)[1]
Settlements Mansfield and Willimantic
References [1][2][3]
Mansfield Hollow Lake
Official name Mansfield Hollow Dam
Location Mansfield and Windham, Connecticut
Construction began 1949
Opening date 1952
Dam and spillways
Impounds Natchaug River
Length 12,420 ft (3,790 m)
Height 68 ft (21 m)
Width (base) 265 ft (81 m)
Reservoir
Creates Lake Naubesatuck

Mansfield Hollow Lake is a reservoir resting on the border of Windham County and Tolland County, Connecticut. It was created by the Mansfield Hollow Dam and is entirely contained within Mansfield Hollow State Park. Designed and constructed by the United States Army Corps of Engineers, this dam substantially reduces flooding along the Quinebaug, Shetucket, and Thames rivers. Construction of the project began in 1949 with completion in 1952 at a cost of US$6.5 million. The Mansfield Hollow reservoir is located within the Shetucket River Watershed and is part of the Thames River Basin. Access to the site is available from US Route 6 and State Route 195 .

Description

The project consists of a rolled earth fill dam with stone slope protection 12,420 feet (3,790 m) long and 68 feet (21 m) high. The spillway comprises a concrete weir 690 ft (210 m) in length. The weir's crest elevation is 16 feet (4.9 m) lower than the top of the dam. The permanent lake at Mansfield Hollow Dam, Naubesatuck Lake is 450 acres (1.8 km2) in size. The flood storage area for the entire project covers about 1,880 acres (7.6 km2) in the towns of Mansfield, Windham, and Chaplin, Connecticut. The entire project, including all associated lands, covers 2,472 acres (10.00 km2). The Mansfield Hollow Dam can store up to 16.1 billion US gallons (61,000,000 m3) of water for flood control purposes. This is equivalent to 5.8 inches (150 mm) of water runoff from its drainage area of 159 square miles (410 km2).

Recreation

Mansfield Hollow State Park is located on Bassett Bridge Road in the town of Mansfield. The park offers boating (8 mph limit), fishing, a shaded picnic area and many miles of hiking, mountain biking and cross-country ski trails. It is open daily from 8 a.m. to sunset. There is no entrance fee. This area is managed by the Connecticut Department of Energy and Environmental Protection.[4]

Mansfield Hollow Dam is located on Mansfield Hollow Road in the town of Mansfield. Here, visitors can picnic on the lawn both downstream of the dam and on the lake side of the dam. The construction of the dam began in 1949 and completed in 1952 at a cost of $6.5 million by the U.S. Army Corps of Engineers. The damsite, covering an area of 25 acres (10 ha), was listed on the National Register of Historic Places in 2003.[5] This dam, which created Mansfield Hollow Lake, substantially reduces flooding along the Quinebaug, Shetucket, and Thames rivers.

The Mansfield Hollow reservoir is located within the Shetucket River Watershed and is part of the Thames River Basin. Access to the site is available from US Route 6 and State Route 195. The top of the dam itself is popular for walking, jogging, and biking. The west half of the dam is approx. 1-mile (1.6 km) long, the east half is almost 2 miles (3.2 km) long. Parking is available at the State Park, Damsite, Commuter Parking Lot on US Route 6, and athletic field parking lot on State Route 89. A boat launch is located on Bassett Bridge Road in the town of Mansfield, 1/2 mile east of the State Park entrance. The dam runs alongside Windham Airport.

References

  1. ↑ 1.0 1.1 1.2 U.S. Geological Survey Geographic Names Information System: Mansfield Hollow Lake
  2. ↑ 2.0 2.1 2.2 Connecticut Department of Environmental Protection (2004). "Mansfield Hollow Lake". Archived from the original on 2006-05-20. 
  3. ↑ 3.0 3.1 United States Geological Survey (2005). "Water Resources Data Connecticut Water Year 2005". p. 82. Retrieved 2007-06-04. 
  4. ↑ "Mansfield Hollow State Park". State Parks and Forests. Connecticut Department of Energy and Environmental Protection. Retrieved 2013-02-05. 
  5. ↑ "NRHP Inventory-Nomination: Mansfield Hollow Dam". National Park Service. 

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