The Town of Raymond sought services to map and evaluate wetlands for groundwater protection and water-quality functions. D&K identified 17 priority wetlands and used the 2015 “Method for Inventorying and Evaluating Freshwater Wetlands in New Hampshire” for flood storage, groundwater, and sediment trapping functions.
D&K provided mechanical, electrical, structural, landscape architecture, and civil design and retro-commissioning services for modifications of nine state facilities, converting from district steam to various types of local heating systems. D&K designed a new steam boiler plant—located remotely from the buildings it served—for the New Hampshire State House and two other State buildings. The project…
The City of Keene’s Wheelock Park previously included a disused campground open for passive recreation. D&K worked with the city’s Parks and Recreation Department, the Repurposing Committee, the public, and additional stakeholders to coordinate a redesign of the park that is in keeping with the city’s vision to provide lifelong opportunities for active living and…
Framed by a public park and a residential area and carrying a city street, Robin Hood Dam was reclassified by the State of New Hampshire as a high-hazard dam, and its spillway did not have the capacity to meet New Hampshire Dam Safety requirements. The City of Keene engaged D&K to evaluate the dam, develop…
The Upper Wilson Pond Dam is a small, high-hazard, earth embankment dam impounding a recreation pond. Recently found to be in poor condition, the dam is owned by the Town of Swanzey, and the pond is bounded by homes and properties located within the City of Keene. D&K’s project team completed a study that evaluated…
Used for aircraft access from the tarmac, the existing seven hangar doors were original to the facility (circa 2003), no longer operated efficiently, had tears in the door fabric assemblies, and were troublesome to repair, as the manufacturer was located in Finland. The doors were 33 ft high and ranged in width from 60 ft…
The Town of Bow needed to replace a 20-ft, rigid-frame culvert with inadequate scour protection, foundations, and geometry. The roadway serves heavy truck traffic and intersects with NH 3A, a state highway frequently used to bypass a tolled section of I-93 near the Interstate I-89 intersection with I-93. D&K designed a replacement structure to address…
To maintain operation under its FERC-issued license, the owner was required to furnish a Part 12D Inspection Report to FERC. Serving as the Part 12D independent consultant, D&K’s engineering team reviewed and analyzed performance and design data and conducted a visual inspection of the water retaining portion of the facility, including both abutments, both powerhouses,…
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…