DuBois & King provides investigation, analysis, planning, design, and construction phase services to dam owners and conservation groups. We have developed a common-sense approach that provides cost-effective solutions for removing dams and restoring organism passage and sediment transfer along natural channels. D&K’s dam and water resource engineers are supported by our surveyors, wetland scientists, geomorphologists,…
Two dams in a park owned by a community association were damaged by storm flows. The lower dam was breached and required design alternatives for its removal; the upper dam had to be evaluated for repairs. D&K reviewed the structural elements of both dams, the retaining wall, and the stream character upstream and downstream. Our…
The Norwich Reservoir Dam was a run-of-the-river, cyclopean concrete gravity dam located on the Charles Brown Brook. The dam impounded a reservoir which became silted in, and the dam served no useful function. The dam caused significant negative impacts to the brook and to downstream reaches. The dam blocked fish passage and caused downstream sediment…
The New Hampshire Department of Environmental Services identified the 1861 concrete and masonry Union Village Dam as high-hazard and deficient in a number of areas. The owners’ preferred option was to remove the dam to reduce potential hazards and remove a hydraulic and aquatic organism passage barrier from the river, restoring the river to a…
The goal of this project was the removal of Stone Pond Dam and associated structures, the restoration of Scott Brook to a free-flowing condition, and the removal of an unnatural barrier to aquatic organism passage (AOP). D&K developed a study and provided a removal design that considered H&H, sediment transfer, and soils and identified alternatives…
The Cross Brothers Dam was no longer used for a long-defunct mill, and the impoundment had silted into the dam’s crest. The dam, built in 1924 and classified as a Low-Hazard dam by the State of Vermont, was a complete obstruction to aquatic organism passage with the potential to further damage water quality. D&K provided…
An aging concrete and masonry dam was deemed structurally deficient by state regulators, and the owners could not justify the expense of reconstruction. D&K connected the owners with the NRCS to fund the construction, which included the removal and disposal of the dam and active restoration of the stream channel. Our team designed the removal…