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Corps of Engineers awards contract for Hopkinton Dam limitorque rehabilitation project in Hopkinton

Published April 11, 2018

CONCORD, Mass. – A limitorque rehabilitation project at the Hopkinton Dam on the Contoocook River in Hopkinton, New Hampshire, will be completed under the terms of a $173,316.00 contract recently issued by the U.S. Army Corps of Engineers, New England District.


Work will be accomplished by JE Prenosil & Company of Thorndike, Mass. The contract was awarded on March 23, 2018. Work is scheduled to be completed within 240 days of contract award.


Work will consist of furnishing all labor, materials and equipment necessary to refurbish Limitorque Gate Hoist Operator Assemblies 5 and 6 with the options to furnish and install new Limitorque B320-90 Series Bevel Gear Operators (or equivalent) in each of the two assemblies located at the Hopkinton Dam Gatehouse. The contractor also will install swivel hoist rings on the gate stem that covers both of these assemblies to aid in reinstallation and future removals. The contractor also will inspect and adjust the gate stem guides for gates 1 through 6 to ensure that all gate stems are plumb, level, and centered to allow free movement of the gate stem.


Hopkinton Dam is 790 feet long and 76 feet high and can impound a 3,700‑acre lake. Nearby Everett Dam, on the Piscataquog River in Weare, is 2,000 feet long and 115 feet high and can impound a 2,900-acre lake. The lakes have a combined storage capacity of 51 billion gallons of water and are linked by a canal, which allows water to be diverted between the two pools. Construction of the dual facility was completed in 1962 at a cost of $21.5 million. During the 1987 flood this combined project utilized 95 percent of its storage capacity and prevented $24.5 million in flood damages. Since the construction in 1962, the two dams are credited with preventing more than $217.1 million in flood damages. In addition, excellent recreational opportunities are available on project lands, including picnicking, swimming, boating, fishing, hunting and snowmobiling. An estimated 450,000 visitors come to the Hopkinton‑Everett project annually. For recreation information call (603) 746-3601 or visit the website at www.nae.usace.army.mil/Missions/Recreation/HopkintonEverettLake.aspx.


For contract information visit: www.nae.usace.army.mil/BusinessWithUs/Contracting.aspx. For general information visit: www.nae.usace.army.mil/. For Small Business information visit: www.nae.usace.army.mil/BusinessWithUs/SmallBusiness.aspx.

Tim Dugan

Release no. 18-029