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Sunderland Town Offices

 

DuBois & King provided wetland delineation, design, and permitting services for a new, 11-acre municipal office building site on municipally-owned land along Sunderland Hill Road and Pit Road. The one-story municipal office building is approximately 3,000 sf with on-site water and wastewater disposal. Firm engineers developed alternative site plans, coordinated with the state and federal regulators, and developed a preliminary site plan that met the town’s needs and satisfied wetland regulations.

Prior to D&K’s involvement, the Town completed and permitted a 167-gallon-per-day, on-site mound wastewater disposal system. The location of the building changed to avoid wetland impacts, so D&K revisited the wastewater system design and the proposed well location to determine if an amended permit was warranted or required.

Chelsea Town Garage

 

Provided study through construction phase engineering services for a $900,000 town garage. The Town outgrew 20-year-old facility and after a 4-year planning process, elected to fund the construction and design of a new site and structure in western Chelsea. Feasibility study considered accessibility; utility, including on-site wastewater and water supply; impact on environmental resources; and applicable permit requirements, including local and various ANR permits and Act 250. Assisted the Town in the presentation of the site and addressing questions at a pre-bond vote meeting. Services included survey; site design; and structural, geotechnical, mechanical, and electrical engineering.

Base Survey Control Benchmarks

 

DuBois & King’s survey team established base survey control benchmarks for the monitoring of SMIA (Salt Marsh Integrity Assessment) sites. The project’s objective is to identify existing and establish new geodetic survey benchmarks that are all defined by the same relative elevation datum. The benchmarks were established at 10 national wildlife refuges in the states of Virginia, New Jersey, Connecticut, Rhode Island, Massachusetts, and Maine.

Converse Road Culvert

 

Study, design, and construction phase engineering for Bridge No. 110/141. D&K completed an alternatives evaluation and recommended replacement of the existing culvert. The firm also provided permit application assistance, prepared final engineering plans and specifications, assisted the Town during the bid phase, and provided the Town with construction administration services.

The original bridge was a 18-foot-long corrugated metal arch with stone headwalls; the culvert was suffering from corrosion, settlement and scour, and had a Federal Sufficiency Rating of 47.4%. The project received funding through the NHDOT Municipal Bridge Aid program and followed the NHDOT Local Public Agency (LPA) process.

First Crown Point Road Culvert

 

D&K provided study, design, and construction phase engineering for Bridge No. 069/164. D&K completed an alternatives evaluation and recommended replacement of the existing culvert. The firm also provided permit application assistance, prepared final engineering plans and specifications, assisted the Town during the bid phase, and provided the Town with construction administration services.

The original culvert was a 14-foot-long corrugated metal pipe culvert with concrete headwalls and wingwalls; the culvert was suffering from corrosion, missing bolts and sagging. The previous culvert had a Federal Sufficiency Rating of 47.9%. The project received funding through the NHDOT Municipal Bridge Aid program and followed the NHDOT Local Public Agency (LPA) process.

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