Dam & Hydro Electric Construction

One of the first major hydro-electric construction projects completed by Wyman & Simpson was the Dead River Dam, built for Central Maine Power in 1949. Since that time, we have constructed numerous hydroelectric facilities and substations in both wet and dry conditions.

China Lake Outlet Dam Fish Ladder

Date: Summer 2022

Wyman and Simpson is proud to have been part of the restoration of Alewife fish migration with the construction of the Outlet Dam Fish Ladder in Vassalboro, Maine. This is the first alewife run from the Atlantic Ocean to China Lake since 1783.

Lockwood Fish Boom & Fish Passage—Kennebec River

Owner: Florida Power & Light

Wyman & Simpson installed a new bypass gate and fish boom at the site of the Lockwood Dam on the Kennebec River. The new passage was cut through a 10-foot-thick forebay wall to construct a new gate and operator. New trash racks and a floating boom were installed. The project also required a considerable amount of dredging (shown here). The resulting installation serves as a barrier, guiding fish away from the dam's turbines.

Wasookeag Lake Dam

Owner: Town of Dexter, Maine

Contract amount: $313,400

Completed: 2007

This project included repairs and upgrades of an existing stone and concrete dam in Dexter, Maine. Wyman & Simpson constructed new concrete retaining walls and placed cut-off walls that required a steel sheet coffer dam and bypass piping for water control during consruction. A new concrete spillway was installed and a portion of the earthen dike was replaced.