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Sep 082015
 

Waitsfield-Covered-Bridge_1The Waitsfield Covered Bridge is the oldest operating covered bridge remaining in Vermont and is a community landmark. Originally constructed in 1833, the bridge is listed on the National and Vermont Registers of Historic Places and serves as an important transportation link between the Village and surrounding outlying areas of the Town. A cantilever sidewalk had been added to the downstream side of the bridge circa 1940 and over time the sidewalk led to asymmetrical loading on the bridge and racking of the downstream truss. D&K was hired by the Town to design improvements to the bridge to reduce or minimize the undesirable loading condition and still maintain pedestrian access across the bridge. D&K developed design drawings for the removal of the former sidewalk and replacement with a new self-supporting sidewalk on widened abutments. The project includes other repairs as well, including replacement of rotting floor beams, replacement of the timber wearing deck, repairs to abutments, repairs to the roof, and improvements to approach railings and signing.

Waitsfield-Covered-Bridge_2In May 2015 construction commenced on the project. The existing sidewalk has been removed, abutments have been widened, and wingwalls have been extended. Additionally, Bridge Street between the Covered Bridge and VT Route 100 has been completely reconstructed including new drainage facilities, sidewalks, curbing, and street lighting. The new pedestrian bridge is scheduled to be installed in early October, with all work being completed several weeks later.

More information can be found on the Town’s website: http://www.waitsfieldvt.us/wip/bridge_street/index.cfm

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Aug 252015
 

Ryegate-1Excavation is nearing completion and the contractor is pouring concrete on the design-build culvert replacement project in Ryegate. DuBois & King is the Lead Design Engineer for the design-build project in Ryegate that will replace culverts that convey Manchester Brook under US Route 5 and the Washington County Railroad. The deteriorated undersized culverts contributed to flooding of US Route 5 and the backwater jeopardized the integrity of the roadway and rail embankments. The culverts are deeply buried structures (over 60 ft under the railroad embankment), with steep embankments on both sides of the roadway and rail line.

Ryegate-2Working with the Vermont Agency of Transportation, the design-build team of DuBois & King and Engineers Construction, Inc., of Williston, Vermont, developed an alternative technical concept structure that consists of two 32-ft-wide by 16-ft-high, cast-in-place, reinforced concrete arch culverts beneath the roadway and rail line. The base technical concept would have resulted in a completely buried structure with a length of 320 ft. The alternative concept being implemented is separate culverts beneath the road and railroad with a curved structure open to daylight in the median. The new culverts are 144 ft and 128 ft in length, and will increase the hydraulic capacity by 25 times the existing capacity. The alternative concept provides for: savings in initial construction costs, better access for maintenance, greatly improved hydraulic capacity, safer conditions for future inspections, improved aquatic habitat, and improved service life.

The new culverts are being installed using an open-cut approach. Temporary sheet piles are being driven up to 70 ft deep through the rail and roadway embankments for support as excavation proceeds down to the bottom of the culvert footings. Temporary bridges were designed to maintain rail and highway traffic over the excavations. Design issues include providing a 100-year service life for the new culverts; support for temporary roadway and rail bridges; significant support of excavation measures; protection and maintenance of the brook throughout construction; and limiting settlement of footings to 1 inch or less. Construction is scheduled to be substantially complete by December 2015.

See the drone video: https://www.youtube.com/watch?v=vwi33vaR7Vs

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Aug 242015
 

West-Hall-92Modeled after Norwich’s highly successful South Hall, the University recently completed the construction of West Hall, a $26 million civilian residence hall for undergraduates. DuBois & King provided civil/site, electrical, and structural engineering for the second 5-story, 286-bed, 75,000-sf, brick and steel framed student housing facility, with municipal water and wastewater. Services included structural, electrical (interior and exterior) and telecommunications, landscape architecture, parking, stormwater management, survey, and Act 250 and local permitting. The facility meets guidelines for energy conservation.

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Aug 242015
 

Jon-AshleyDuBois & King is pleased to announce that Jonathan Ashley has joined the firm as a Senior Civil/Environmental Engineer. Mr. Ashley has 20 years of professional experience, including site development, brownfield and hazardous site remediation, permitting, and engineering services for roadways, slope stability, stormwater, and water/sewer projects throughout Vermont and New York. Jon is a resident of Whiting and works out of the out firm’s Randolph office.

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Aug 242015
 

Andy-HoakAndrew Hoak, PE, PG, has joined DuBois & King as a Manager of the firm’s Water Resources Department. Mr. Hoak is a hydrogeologist and an environmental engineer with 20 years of experience consulting on water quality, stormwater management, water and wastewater studies, brownfields and hazardous materials, and groundwater and soil remediation. Andy lives in Jeffersonville and is based out of the firm’s Randolph office.

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