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…
To efficiently manage the design of highway surfacing and appurtenant systems, the Vermont Agency of Transportation (VTrans) engages consultants to supplement in-house engineering, environmental, and surveying services. Since 1998, D&K has provided design for state and US highways, including interstates, urban Class 1 sections of US or state highways, major and minor arterials, and rural…
VT 116/VT 17—with segments known locally as Main Street, East Street, and Stony Hill Road—serves Bristol Village, connecting shops, restaurants, institutions, public places, and homes. Flanked by diagonal parking spaces, sidewalks, and green spaces, VT 116 is the site of much of the village’s identity and carries a high volume of bicycle, pedestrian, and vehicle…
Sweet Pond Dam is a 20-ft-high by 77-ft-long circa-1928 dam that impounds an 18-acre pond with a contributing drainage area of approximately 1 square mile. The dam sustained uncontrolled and excessive seepage through highly fractured and weathered bedrock and posed a barrier to AOP. D&K provided planning, evaluation, alternatives analysis, preliminary and final design, permitting…
The Vermont Agency of Transportation wished to establish public electric-vehicle charging infrastructure on VTrans-owned property. Working for the Policy, Planning, and Intermodal Development Division of VTrans, D&K teamed up with the Vermont Energy Investment Corporation to author a plan to provide the necessary tools for an EV charging-station network. The project team evaluated VTrans properties for…
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…
MaineDOT sought to enlarge and improve a stream crossing in conjunction with a highway widening and resurfacing project. Under a MaineDOT General Consultant Agreement, D&K designed a new buried, precast concrete box structure with bed retention sills to aid aquatic organism passage and comply with Maine Department of Environmental Protection crossing rules. The interior dimensions…
The Vermont Agency of Transportation had to replace a buried water conveyance structure that was (hydraulically) undersized and causing the rail and roadway embankments to act as a dam during moderate and large storm events. Located 70 feet below grade in some places, the existing system of metal pipes and concrete structures was in poor…
Swollen by a large storm event, the Middlebury River and local drainages damaged VT 125 in Ripton. The highway was temporarily repaired in the weeks immediately following the storm, but long-term repairs were sorely needed. The project environment consisted of steep roadway embankments immediately adjacent to the Middlebury River. High water velocities and a sinuous…