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| North Hartland Dam | |
|---|---|
| Name | North Hartland Dam |
| Country | United States |
| Location | Hartland, Windsor County, Vermont |
| Status | Operational |
| Opening | 1967 |
| Owner | United States Army Corps of Engineers |
| Dam type | Earthen |
| Dam height | 159ft |
| Dam length | 1150ft |
| Reservoir | North Hartland Lake |
| Capacity total | 13,000 acre-feet |
North Hartland Dam is a flood-control earthen dam on the Ottauquechee River in Hartland, Vermont, constructed and operated by the United States Army Corps of Engineers as part of regional flood risk management. The dam impounds North Hartland Lake and functions within broader watershed networks linked to the Connecticut River basin, coordinating with federal and state agencies for reservoir regulation and recreation. It sits amid New England transportation and infrastructure corridors proximate to Interstate 91, U.S. Route 5, and the Vermont Railway.
The facility is located in Windsor County, Vermont near the Connecticut River confluence, occupying land historically associated with Hartland (town), Vermont and adjacent to communities such as Lebanon, New Hampshire and White River Junction. The site lies within the New England physiographic region and the Upper Connecticut River watershed managed through multijurisdictional compacts involving the State of Vermont and the U.S. Army Corps of Engineers, New England District. Topographically, the dam crosses a narrow valley formerly traversed by the Ottauquechee River and is set against terrain influenced by glacial processes related to the Laurentide Ice Sheet and the geomorphology studied in Vermont and New Hampshire.
The project emerged from post-Hurricane Diane and mid-20th-century flood responses influenced by flood events such as the Flood of 1936 and catastrophic flooding in 1938 New England hurricane era planning that reshaped federal water resources policy including the Flood Control Act of 1944. The North Hartland project was authorized under national flood control and navigation programs executed by the U.S. Army Corps of Engineers and coordinated with the Federal Emergency Management Agency predecessors and the U.S. Geological Survey for hydrologic studies. Construction began in the 1960s with civil contractors experienced from projects like the Hoover Dam and the Bonneville Lock and Dam program, culminating in commissioning in 1967 during the administration of Lyndon B. Johnson. Land acquisition involved negotiation with local landowners and towns including Hartland (town), Vermont and agencies such as the U.S. Forest Service for downstream resource integration.
The structure is an earthen embankment engineered to standards comparable to Corps projects like Folsom Dam and the Glen Canyon Dam in terms of seepage control and spillway hydraulics, though on a smaller scale. Key design elements include an impervious core, riprap-armored slopes, and an auxiliary concrete spillway channel equipped with gated outlets inspired by designs refined after Johnstown Flood analyses and dam safety advances from the U.S. Bureau of Reclamation. Instrumentation includes piezometers and inclinometers informed by research at institutions such as Massachusetts Institute of Technology and the University of Vermont for embankment monitoring. Hydraulic capacity was modeled using methodologies from the National Weather Service and the Army Corps Hydrologic Engineering Center (HEC), aligning flood routing with downstream infrastructure in Windsor County, Vermont and urban areas like Hartford, Connecticut via the Connecticut River system.
Operational control is conducted by the United States Army Corps of Engineers, New England District in coordination with the National Weather Service and state emergency management agencies. The reservoir manages seasonal runoff from the Ottauquechee River basin and integrates forecasts from the National Oceanic and Atmospheric Administration and hydrologic inputs measured by USGS stream gauges. Water releases are scheduled to mitigate spring snowmelt influenced by New England climate patterns, and to balance downstream flows for municipal water systems in communities along the Connecticut River corridor. Operational plans reference federal policies developed under programs like the Water Resources Development Act and utilize emergency action procedures consistent with the Federal Emergency Management Agency guidance.
North Hartland Lake provides recreational opportunities similar to Corps-managed sites such as Lake Wallenpaupack and Wells Dam reservoirs, offering boating, fishing, picnicking, and trails maintained by local Vermont recreation departments and volunteer organizations like regional chapters of the Audubon Society and the Appalachian Mountain Club. Fisheries management involves coordination with the Vermont Fish and Wildlife Department and stocking programs influenced by angling communities from towns like Hartford, Vermont and White River Junction. Environmental impacts were assessed in environmental impact statements contemporaneous with federal practice influenced by the National Environmental Policy Act; mitigation included wetland preservation, habitat restoration partnering with organizations such as the The Nature Conservancy and state conservation commissions, and monitoring for aquatic species including native brook trout populations studied by researchers at the University of Vermont and regional conservation groups.
Routine maintenance follows Corps protocols established after notable dam incidents involving structures like Teton Dam and the St. Francis Dam failures, emphasizing inspection cycles, spillway upkeep, and emergency preparedness with communities including Hartland (town), Vermont and nearby municipalities. Past maintenance activities have addressed erosion, riprap replacement, and outlet gate refurbishment contracted through regional civil engineering firms with oversight by the U.S. Army Corps of Engineers. Emergency action plans coordinate with Vermont Emergency Management and include notification procedures with the Federal Emergency Management Agency and local first responders in Windsor County, Vermont.
Category:Dams in Vermont Category:United States Army Corps of Engineers dams Category:Buildings and structures in Windsor County, Vermont