Located downstream of a large flood control dam, the EHC hydroelectric facility includes turbines at two locations along a one-mile-long intake channel and produces approximately 1.26 MW. The owner needed to replace and upgrade various components of the intake, including replacing the headgate lifting frame, replacing the rack-raker system, replacing the existing timber site/retaining walls…
A large storm event washed out most of the approach to one abutment and damaged the superstructure of the Green River Covered Bridge. The Town of Greenfield required long-term repairs and upgrades to this historic resource. D&K evaluated the structure, provided rehabilitation design and permitting assistance, and performed bid and construction contract administration and observation…
Along Otter Creek, a 160-ft-long, 20-ft-high slide occurred on the Gooseneck Bend Road embankment, disrupting the roadway’s stability. The Town of Weybridge secured FEMA funding and engaged D&K to evaluate the failure and design long-term improvements that armored the embankment along the roadway using stone armoring and plantings, stabilizing the immediately adjacent gravel road.
DuBois & King (D&K) provided construction administration and observation services for the installation of new water, sewer, stormwater, phone, cable, and power utilities to serve a new neighborhood within the South Ridge development. Our team reviewed the stormwater collection and treatment systems for compliance with the project permits and state rules. D&K assisted with Act…
In response to repeated storm damage to this 1,900-ft-long, circa 1960s Army Corps granite block protection levee, the Town of Lincoln needed to repair the levee to maintain an acceptable level of service. DuBois & King evaluated the structural, hydrologic and hydraulic, civil, and structural conditions and requirements of this site along the Pemigewasset River….
Approximately 400 LF of the Town Highway 35 (Gilman Road) embankment along the White River failed as a result of flooding following a severe storm. The vertical height of the failed riverbank is approximately 80 ft. The road embankment was eroded, and the resulting slope was unstable and vulnerable to damage. On behalf of the…
The existing circa-1927 water lines were deteriorating and in need of replacement due to frequent leaks and need for emergency repairs. D&K provided design, permitting, bid, and construction phase services to replace 3,083 ft of water lines, hydrants, valves, and metering as part of a 9,110-LF distribution system. Construction of the water distribution system was…
The city completed the design of improvements to the existing wastewater pump station. Through that process, it became evident that the existing system had reached the end of its operating life, and selected components should be replaced rather than upgraded to provide increased reliability, energy efficiency, safety, and compatibility with other city pump stations. D&K…
Orwell’s wastewater treatment facility includes an aerated lagoon facility that provides secondary treatment and chlorine disinfection of wastewater. The facility’s aging lagoon aeration system was a submerged lateral system that had become inadequate and inefficient. D&K provided design, bid, construction management, and startup assistance services to upgrade the lagoon aeration system to meet current standards….