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National Guard Information Systems Facility

 

New 30,000-sf state-of-the-art computer and communications facility for the Vermont Army National Guard (VTARNG). This project modernizes the VTARNG Information Systems facilities to address operational and security requirements into the future. Services included:

  • Surveying and AutoCAD base mapping
  • Landscape architecture
  • Site engineering for grading, stormwater management, water, and wastewater systems
  • Construction phase services

The project included design of an innovative stormwater management system that resulted in zero discharge of runoff from the site during the design storm. The zero discharge system was required to minimize impacts to downstream wetland areas. The swales and retention areas were designed to provide treatment to remove possible contamination from the stormwater and were arranged around the perimeter of the building to restrict access to the facility and to function as a force protection measure.

Existing paved areas adjacent to the project were utilized to provide the required parking for the project, resulting in a reduction in material requirements and environmental impacts.

Mount Orne Covered Bridge

 

The Mount Orne Bridge is a 266-ft-long, two span structure constructed in 1911. The bridge spans the Connecticut River, connecting Lancaster, New Hampshire, with Lunenburg, Vermont. This span utilizes four Howe type trusses, spaced 16 ft apart for a one-lane bridge.

Following a truck accident at the bridge, DuBois & King was selected by the Town of Lancaster and the Town’s insurance carrier to evaluate damage to the bridge, design repairs, and administer implementation of repairs during construction.

The bridge was struck by an oversized tractor-trailer, which resulted in considerable damage to the bridge. The extent of damage included the total destruction of the east portal (NH side portal) and numerous upper lateral bracing members. Damage also occurred to top chord truss members on the upstream and downstream east spans and on the west portal siding.

Design of repairs included the replacement of several upper lateral bracing timbers, reconstruction of the top chords of the east truss spans, reconstruction of the east portal and siding, and repairs to the west portal siding. Repairs were also made to the damaged metal roof and roof rafters at the east end of the bridge. A construction estimate for needed repairs was provided to the Town and the Insurance Carrier. Construction of repairs and replacement members was completed in three months.

Millstone Hill West Bike Path

 

D&K engineers completed the alignment analysis, developed final design, and prepared final engineering plans and contract documents for the Millstone Hill West Bike Path, a 7,100 ft-long, 10 ft-wide shared use pathway for pedestrians, bicyclists, and other non motorized users. As part of the larger Central Vermont Regional Path, the Millstone Hill West Bike Path provides connection between the Websterville and Graniteville area, the elementary school and Graniteville neighborhood, recreational and residential areas, and commercial and industrial operations.

The project was developed through the VTrans Local Transportation Facilities (LTF) Section and followed the LTF Guidebook. Professional services included project definition (purpose and need, project scoping, information gathering, public participation), right-of-way, utility considerations, final design and contract documents, and engineering services during bid and construction. Environmental documentation and permitting services included: Categorical Exclusion, Wetlands, Historical & Archaeological, Stormwater, NPDES, Corps of Engineers, Stream Alteration, and Act 250.

The design incorporated reuse and recycling techniques, avoidance of natural resources, and extensive alignment analysis. Bridges (90 and 60-ft spans) were used to span a large wetland and a stream. D&K advocated use of recycled steel beams for the longer bridge and adaptive reuse of a historic steel truss bridge for the shorter span, resulting in significant cost savings to the Town. Trees removed from the path during construction were ground on site and used for erosion control. D&K was proactive in right-of-way acquisition, engaging property owners through early and consistent coordination and informational meetings resulting in significant public and landowner support for the project. Work included property owner meetings, development of preliminary and final right-of-way plans, property appraisals, and assistance with review of right-of-way documents.

Middle School Electrical Design

 

DuBois & King provided electrical engineering services for the $10.5 million complete renovation of the Bellows Falls Middle School. The Bellows Falls Middle School is a 5-8 grade regional middle school serving 250 students. Scope of services included full design narrative, drawings, bidding assistance, shop drawing review, coordination with the architect, and site visits during construction. Electrical design included new interior lighting, life safety systems, switchboards, data infrastructure, HVAC interface, and design of LED site lighting. The project followed USGBC LEED Green Building guidelines.

Middle Road Bridge Replacement

 

DuBois & King conducted planning, bridge type study, permitting, and engineering for this 85-ft-long structural steel and concrete deck bridge on cast-in-place concrete abutments. Performed an alignment and bridge type study for the rehabilitation of this historic truss bridge, which spans the Cold River, and evaluated alternatives for replacement. Performed detailed structural analysis based upon field measurements and as-built drawings of the existing truss. Given AASHTO roadway widths and HS-25 loading requirements, the existing truss bridge would have to be widened and the majority of the members replaced, thereby nullifying the bridge’s historical integrity.

Design services included: bridge geometry, roadway approaches, evaluation of current and future traffic usage, hydrologic and hydraulic analysis, and bridge abutment scour analysis. The new structure was designed to carry HS-25 truck loadings. The project was administered through VTrans’ Town Highway Bridge Program and designed in accordance with VTrans’ design process and AASHTO design criteria.

D&K was responsible for all permitting including wetland and fisheries evaluation and coordination with SHPO, VT ANR, and the USACE. Prepared NEPA documentation and coordinated archaeological studies within the project area.

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