Mechanical Engineering

  • Northfield Wastewater Treatment Facility

    The 40-year-old Northfield Wastewater Treatment Facility (WWTF) required a comprehensive upgrade of the facility and process conversion from Trickling Filter (TF) to Sequencing Batch Reactor (SBR) to comply with stringent phosphorous limitations. The site was constrained by the railroad and the Dog River, requiring geotechnical measures to protect rails. D&K conducted all professional engineering services…

  • Energy Audit for Four Buildings

    In an effort to pursue greater building efficiency and operational cost savings, the New Hampshire Army National Guard (NHARNG) conducts annual facility energy audits of all facilities on a rotating basis. D&K conducted an energy audit at four out of a total of 35 NHARNG facilities.  D&K evaluated lighting, air quality, temperature, ventilation, humidity, and…

  • WWTF Natural Gas Use Evaluation

    The city wished to evaluate and determine cost-effective measures to reduce on-site natural gas use, receiving partial funding through the VGS Energy Efficiency program. D&K’s project team conducted a site visit to obtain detailed information on existing natural gas use-related processes, HVAC and building envelope materials, equipment, and systems. We reviewed historical natural gas use…

  • HVAC Energy Study for Five Buildings

    The project goal was to consider Energy Reduction Measures (ERMs) in the following buildings: fire station, public works, police station, Airport Parkway water treatment facility office/lab at Airport Parkway, and the Bartlett Bay Road water treatment facility office/lab. D&K reviewed the building control systems, investigated energy usage and reduction opportunities, developed opinions of construction costs,…

  • Costello Courthouse Energy Audit

    To support VT BGS, D&K completed an energy audit of a six-story, 165,000-SF courthouse. The project team conducted a review of available documentation and performed field investigations to document building envelope insulation and air sealing; HVAC equipment, systems, and controls; plumbing fixtures and water heating equipment; lighting fixtures, illumination levels, and controls; plug loads; and…

  • Cooper House Net Zero Renovation

    D&K provided architectural, MEP, structural, and civil engineering design to renovate a 3,700-SF, two-story administration building using a Net-Zero basis of design and operation. The building is powered by solar PV arrays located on site. The scope included design of a new high-performance envelope, expanded interior space with structural improvements, new MEP systems, and civil…

  • On-Call Services for Verizon Sites

    To provide wide-ranging, reliable, and high-capacity coverage, Verizon Wireless renovates its facilities, establishes new sites, and constructs telecommunication installations on existing, prominent structures. D&K has served more than 200 of Verizon’s locations throughout Vermont. Sites range from locations in buildings, on farm silos, and at other urban locations or in remote rural, mountain, and wooded…

  • GMC Emergency Power Upgrades

    Gifford’s Medical Center’s (GMC) emergency power system required an evaluation and a number of facility upgrades. D&K’s multidisciplinary team provided MEP and structural design for a pad-mounted transformer, service entrance, generator, service entrance power distribution, transfer switches, dry-type transformer, and related feeder work. Mechanical upgrades included a roof-mounted air handler and associated piping design. Structural…