To manage the development of ancillary highway and safety projects in scoping, design, and construction phases, the Vermont Agency of Transportation engages on-call consultants to provide engineering evaluation, design, permitting, and appurtenant professional services. D&K provides services under a statewide contract developing projects that enhance traffic control and signing, intersections, slopes, rail crossings, park-and-rides, rest…
Three small municipalities had to find a solution to maintain Lake Fairlee, a regional recreational resource with numerous lakefront properties that make up a substantial component of these towns’ grand lists. The logistics and politics of rehabilitating the Lake Fairlee Dam were complex: the dam is privately owned, and the dam’s concrete auxiliary spillway, which…
The Glencliff Home is an off-the-grid assisted living facility whose primary purpose is to provide adults with mental health care. The campus includes residential, care, office, and maintenance spaces and uses a combination of renewable energy systems, including a hydroelectric facility, as well as fossil fuels to supply power and heat. For many years, D&K…
The North Attleboro National Fish Hatchery is a pond complex consisting of large rearing ponds supplied and drained by a network of water pipes and valves, which are equipped with concrete water control structures (called kettles) that control the pond water levels, manage the water between ponds, and drain the ponds. The USFWS required selective…
Sucker Brook was a deeply incised stream channel that threatened nearby infrastructure and sent an estimated one ton of phosphorus per year downstream toward Lake Champlain. The project goals included a reduction of sediment loading and erosion and the restoration of aquatic and riparian habitat while minimizing construction and maintenance costs. D&K prepared conceptual and…
Built into a hillside, Gardiner’s historic district, bounded by the Cobbosseecontee Stream and the Kennebec River, is garnering new interest and investment after mills and other large institutions closed. D&K developed a ten-year downtown master plan that improves resilience against coastal and inland flooding, economic sustainability, stormwater capacity and pollution control, and multimodal accessibility. Through…
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…