Mansfield Hollow Lake

Reservoir in Mansfield & Windham, Connecticut

41°46′32″N 72°11′00″W / 41.77556°N 72.18333°W / 41.77556; -72.18333 ^[1]TypeReservoirPrimary inflowsNatchaug River, Fenton River, Mount Hope RiverPrimary outflowsNatchaug RiverCatchment area163 sq mi (420 km²) ^[2]Basin countriesUnited StatesMax. length2.2 miles (3.5 km)Max. width2,400 feet (730 m)Surface area440 acres (180 ha):
Normal pool ^[2]Max. depth23 ft (7.0 m) ^[2]Water volume90,000,000 cubic feet (2,500,000 m³):
Normal pool ^[3]Surface elevation210 feet (64 m) ^[1]SettlementsMansfield Center

Dam in Mansfield & Windham

Mansfield Hollow Dam

Official name	Mansfield Hollow Dam
Location	Mansfield & Windham
Construction began	1949
Opening date	1952

Mansfield Hollow Dam
U.S. National Register of Historic Places

NRHP reference No.	03000194
Added to NRHP	April 12, 2003

Operator(s)	Army Corps of Engineers
Dam and spillways
Impounds	Natchaug River
Height	68 ft (21 m)
Length	12,420 ft (3,790 m)
Width (crest)	15 ft (4.6 m)
Width (base)	265 ft (81 m)
Reservoir
Creates	Mansfield Hollow Lake (Lake Naubesatuck) ^[4]

Mansfield Hollow Lake is a reservoir resting on the border of Windham County and Tolland County, Connecticut. The reservoir provides drinking water for Willimantic and helps control flooding in the 159-square-mile Thames River watershed.^[4] It was created by the Mansfield Hollow Dam and is entirely contained within Mansfield Hollow State Park and the Mansfield Hollow Wildlife Area.^[5] Designed and constructed by the United States Army Corps of Engineers, the 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.^[6] 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 damsite, covering an area of 25 acres (10 ha), was listed on the National Register of Historic Places in 2003.^[7]

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 8.3 billion US gallons (31,000,000 m³) of water for flood control purposes. This is equivalent to 6.1 inches (150 mm) of water runoff from its drainage area of 159 square miles (410 km²).^[6]

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. A boat launch is located on Bassett Bridge Road in the town of Mansfield, 1/2 mile east of the state park entrance. 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.^[8]

Mansfield Hollow Dam is located on Mansfield Hollow Road in the town of Mansfield. Visitors can picnic on the lawn both downstream of the dam and on the lake side of the dam. The top of the dam 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. The dam runs alongside Windham Airport.

References

^ ^a ^b ^c "Mansfield Hollow Lake". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
^ ^a ^b ^c "Mansfield Hollow Lake". Connecticut Department of Environmental Protection. 2004. Archived from the original on May 20, 2006. Retrieved June 4, 2007.
^ "Water Resources Data: Connecticut: Water Year 2005" (PDF). United States Geological Survey. 2005. p. 82. Retrieved June 4, 2007.
^ ^a ^b Marteka, Peter (September 4, 2001). "Hollow, Nice to Meet You". Hartford Courant. Hartford, Conn. Retrieved December 17, 2018.
^ "Mansfield Hollow State Park Map" (PDF). State Parks and Forests. Connecticut Department of Energy and Environmental Protection. May 19, 2010. Retrieved February 5, 2013.
^ ^a ^b "Mansfield Hollow Lake Flood Risk Management Project". U.S. Army Corps of Engineers. Retrieved December 17, 2018.
^ "Mansfield Hollow Dam". NPGallery. National Park Service. April 12, 2003. Retrieved December 17, 2018.
^ "Mansfield Hollow State Park". State Parks and Forests. Connecticut Department of Energy and Environmental Protection. Retrieved February 5, 2013.

External links

Mansfield Hollow Lake U.S. Army Corps of Engineers
Mansfield Hollow State Park Connecticut Department of Energy and Environmental Protection

Thames River Watershed

Tributaries

Connecticut	Basset Brook Beaver Brook Bigelow Brook Fenton River Fishers Brook Five Mile River French River Hop River Little River Merrick Brook Moosup River Mount Hope River Natchaug River Oxoboxo River Pachaug River Quinebaug River Shetucket River Thames River Willimantic River Yantic River
Massachusetts	French River Quinebaug River

Lakes

Connecticut	Ashford Lake Gardner Lake Killingly Pond Lake Chaffee Mansfield Hollow Lake Mashapaug Lake Quaddick Reservoir West Thompson Lake

v t e Protected areas of Connecticut
National Park Service	Weir Farm National Historical Park
National Wildlife Refuges	Silvio O. Conte Stewart B. McKinney
National Trails	Appalachian Trail New England National Scenic Trail Washington–Rochambeau Revolutionary Route
Wild and Scenic Rivers	Ashaway River Eightmile River Farmington River Green Fall River Housatonic River Pawcatuck River Salmon Brook Shunock River Wood River
State Parks	Above All Air Line Beaver Brook Becket Hill State Park Reserve Beckley Furnace Industrial Monument Bennett's Pond Bigelow Hollow Black Rock Bluff Point Bolton Notch Brainard Homestead Burr Pond Camp Columbia Campbell Falls Chatfield Hollow Collis P. Huntington Connecticut Valley Railroad Dart Island State Park Day Pond Dennis Hill Devil's Hopyard Dinosaur Eagle Landing Farm River Farmington Canal Fort Griswold Battlefield Fort Trumbull Gardner Lake Gay City George Dudley Seymour George Waldo Gillette Castle Haddam Island Haddam Meadows Haley Farm Hammonasset Beach Harkness Memorial Haystack Mountain Higganum Reservoir Hop River State Park Trail Hopemead Hopeville Pond Horse Guard Housatonic Meadows Humaston Brook Hurd Indian Well John A. Minetto Kent Falls Kettletown Killingly Pond Lake Waramaug Lamentation Mountain Larkin State Park Trail Lovers Leap Macedonia Brook Machimoodus Mansfield Hollow Mashamoquet Brook Mianus River Millers Pond Minnie Island Mohawk Mountain Mono Pond Moosup Valley State Park Trail Mooween Mount Bushnell Mount Riga Mount Tom Old Furnace Osbornedale Penwood Platt Hill Pomeroy Putnam Memorial Quaddick Quinebaug Lake Quinnipiac River River Highlands Rocky Glen Rocky Neck Ross Pond Salt Rock State Campground Satan's Kingdom State Recreation Area Scantic River Selden Neck Seth Low Pierrepont Sherwood Island Silver Sands Sleeping Giant Southford Falls Squantz Pond Stillwater Pond Stoddard Hill Stratton Brook Sunnybrook Sunrise Talcott Mountain Tri-Mountain Trout Brook Valley Wadsworth Falls West Rock Ridge Wharton Brook Whittemore Glen Windsor Locks Canal State Park Trail Windsor Meadows Wooster Mountain
State Forests	Algonquin American Legion Centennial Watershed Cockaponset Enders James L. Goodwin Housatonic Massacoe Mattatuck Meshomasic Mohawk Mohegan Nassahegon Natchaug Nathan Hale Naugatuck Nehantic Nepaug Nipmuck Nye-Holman Pachaug Paugnut Paugussett People's Pootatuck Quaddick Salmon River Shenipsit Topsmead Tunxis Wyantenock
Wildlife Management Areas	Aldo Leopold WMA Assekonk WMA Babcock Pond WMA Barber Pond WMA Barn Island WMA Bartlett Brook WMA Bear Hill WMA Belding WMA Bishops Swamp WMA Black Pond WMA Candlewood Hill WMA Cedar Swamp WMA Charles E. Wheeler WMA Cromwell Meadows WMA Durham Meadows WMA East River Marsh WMA East Swamp WMA Eightmile River WMA Franklin Swamp WMA Goshen WMA Great Harbor WMA Higganum Meadows WMA Housatonic River WMA King's Island Coop WMA Kollar WMA Larson Lot WMA Little River Fish and Wildlife Area Lord's Cove WMA Maromas Coop WMA Meadow Brook WMA Menunketesuck WMA Messerschmidt WMA Newgate WMA Nod Brook WMA Nott Island WMA Pease Brook WMA Plum Bank WMA Quinebaug River WMA Quinnipiac River Marsh WMA Ragged Rock WMA Raymond Brook Marsh WMA Robbins Swamp WMA Roger Tory Peterson Wildlife Area Roraback WMA Rose Hill WMA Ross Marsh WMA Salmon River Cove and Haddam Neck WMA Sessions Woods WMA Simsbury WMA Skiff Mountain Coop WMA James V. Spignesi WMA Stanley Works WMA Suffield WMA Talbot WMA Tankerhoosen WMA Wangunk Meadows WMA Wopowog WMA Zemko Pond WMA
Reservoirs	Aspetuck Reservoir Barkhamsted Reservoir Beaver Dam Lake Candlewood Lake Easton Reservoir Far Mill Reservoir Hemlock Reservoir Hop Brook Lake Lake Lillinonah Mansfield Hollow Lake Means Brook Saugatuck Reservoir Trap Falls Reservoir West Hartford Reservoir West Pequonnock Reservoir Lake Zoar
Private	Aspetuck Land Trust Aton Forest Audubon Center at Bent of the River Bartlett Arboretum and Gardens Bear Mountain Beckley Bog Branford Land Trust Case Mountain Cathedral Pines Connecticut Audubon Society Center at Fairfield Connecticut College Arboretum Devil's Den Preserve Earthplace Great Mountain Forest Higby Mountain Highstead Arboretum Joshua's Tract Conservation and Historic Trust McLean Game Refuge New Canaan Nature Center Peter's Rock Pine Mountain Reserve Saltonstall Mountain Stamford Museum & Nature Center Steep Rock Association Weantinoge Heritage Land Trust White Memorial Foundation Woodcock Nature Center Yale-Myers Forest
Trails	American Legion State Forest Trails Aspetuck Valley Trail Blue-Blazed Trails Chatfield Trail Hancock Brook Trail Housatonic Range Trail Lillinonah Trail Mattabesett Trail Menunkatuck Trail Metacomet Trail Narragansett Trail Natchaug Trail Naugatuck Trail Nehantic Trail Nipmuck Trail Paugussett Trail Pequot Trail Quinnipiac Trail Regicides Trail Salmon River Trail Shenipsit Trail Tunxis Trail Westwoods Trails Whitestone Cliffs Trail Zoar Trail
Nature centers	List of nature centers in Connecticut
Local Government Forest/Parks	Bear Mountain Reservation Beardsley Park Burr Farm Protected Open Space East Rock Park Gurski Farm Protected Open Space Happy Landings Protected Open Space Lighthouse Point Park Lillinonah Woods Mill River Park Old Bridge Sanctuary Pleasure Beach Roosevelt Forest Salt Meadow Park Seaside Park Webb Mountain Discovery Zone Webb Mountain Park
Connecticut Department of Energy and Environmental Protection

v t e U.S. National Register of Historic Places in Connecticut
Lists by county	Fairfield Hartford Litchfield Middlesex New Haven New London Tolland Windham
Lists by city or town	Bridgeport Greenwich Hartford Middletown New Haven Southington Stamford West Hartford Windsor
Other lists	Bridges National Historic Landmarks
Keeper of the Register History of the National Register of Historic Places Property types Historic district Contributing property

Canals and reservoirs of Connecticut

Canals

Reservoirs

Connecticut River Watershed	Lake Beseck Shenipsit Lake
Housatonic River Watershed	Candlewood Lake Hop Brook Lake Lake Zoar
Pequonnock River Watershed	Success Lake
Saugatuck River Watershed	Aspetuck Reservoir Saugatuck Reservoir
Thames River Watershed	Killingly Pond Mansfield Hollow Lake Quaddick Reservoir West Thompson Lake
Others	Hemlock Reservoir Higganum Reservoir Kohanza Reservoir Lake Gaillard Lake Lillinonah West Hartford Reservoir

Lakes and ponds of Connecticut by drainage system

Lakes

Byram River Watershed	Converse Lake
Connecticut River Watershed	Lake Beseck Lake Hayward Lake Pocotopaug Shenipsit Lake
Farm River Watershed	Lake Saltonstall
Hammonasset River Watershed	Deer Lake
Housatonic River Watershed	Bantam Lake Candlewood Lake Crystal Lake Highland Lake Hop Brook Lake Lake Quassapaug Lake Waramaug Lake Zoar Twin Lakes
Pequonnock River Watershed	Great Hollow Lake Pinewood Lake Success Lake
Quinnipiac River Watershed	Lake Whitney
Thames River Watershed	Ashford Lake Gardner Lake Lake Chaffee Mansfield Hollow Lake Mashapaug Lake West Thompson Lake
Others	Lake Gaillard Lake Lillinonah Squantz Pond Tuxis Pond

Ponds

Connecticut River Watershed	Millers Pond
Housatonic River Watershed	Burr Pond
Thames River Watershed	Killingly Pond
Others	Round Pond

v t e Willimantic, Connecticut
Schools and universities	Natchaug School Eastern Connecticut State University
Landmarks and places	Connecticut Eastern Railroad Museum Main Street Windham Town Hall Willimantic Freight House Jillson Mills Windham Textile Museum Jillson House Jillson Square Willimantic Footbridge Willimantic Armory Willimantic Elks Club Prospect Hill
Geography	Shetucket River Willimantic River Hop River Natchaug River Mansfield Hollow Lake Fenton River