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Verizon Wireless – Danby Telecommunications Facility

 

DuBois & King provided civil/site, electrical, structural, and environmental engineering services to design, permit, and construct a new telecommunications facility in the Town of Mt Tabor, Vermont. Project included design of an access road, a 50 ft by 75 ft telecommunications compound located in a flood plain, a 100 ft tall stealth flag pole designed to conceal the antennas, and utility services to operate the facility. Services included:

Assistance with site selection
Preparation of lease exhibits
Wildlife, habitat, flood zone, and wetlands assessments
Topographic survey and site plan
Cell tower visual impact simulation
Site design of telecommunications compound
Design of access road
Erosion control
Permitting (local and state, including Act 250)
Structural design of equipment shelter foundation
Electrical engineering including grounding design
Construction documents
Construction phase services

Verizon Wireless – Ferrisburgh Center Telecommunications Facility

 

DuBois & King provided civil/site, electrical, structural, and environmental engineering services to design, permit, and construct a new telecommunications facility in the Town of Ferrisburgh, Vermont. Project included design of an equipment shelter attached to an existing barn designed to resemble existing additions to the barn, 10 ft fiberglass RF transparent extension of the existing Harvestore silo to enclose the telecommunications antennas, and utility services to operate the facility. Services included:

Assistance with site selection
Preparation of lease exhibits
Wildlife, habitat, and wetland assessments
Topographic survey and site plan
Cell tower visual impact simulation
Erosion control
Permitting (local and state, including Act 250)
Design of equipment shelter
Structural design of equipment shelter foundation
Electrical engineering including grounding design
Hearings testimony
Construction documents
Construction phase services

Verizon Wireless – Killington Center Telecommunications Facility

 

DuBois & King provided civil/site, electrical, structural, and environmental engineering services to design, permit, and construct a new telecommunications facility in the Town of Killington, Vermont. Project included improvements to a 2,000 ft existing trail with grades approaching 30% on portions of the road, a 50 ft by 50 ft telecommunications compound located on the hillside, a 107 ft tall stealth tree tower, and utility services to operate the facility. Services included:

Assistance with site selection
Preparation of lease exhibits
Wildlife, habitat, and wetland assessments
Topographic survey and site plan
Cell tower visual impact simulation
Site design of telecommunications compound
Design of access road
Stormwater treatment and erosion control
Permitting (local and state, including Act 250)
Structural design of equipment shelter foundation
Electrical engineering including grounding design
Hearings testimony
Construction documents
Construction phase services

Green River (Pumping Station) Covered Bridge

 

Conducted investigations and developed plans and cost estimates for the restoration and repair of the Green River (Pumping Station) Covered Bridge. The east abutment was severely scoured and settled as much as 6 ft as a result of a Tropical Storm Irene-related flood event, causing uneven settlement of the truss end bearings and racking and distortion of the bridge superstructure. Several main timber elements were distorted and broken. The bridge is a 93-ft-long, single span structure spanning the Green River. Constructed in 1972, the bridge utilizes Howe truss framing and has a cantilevered sidewalk. Recommendations and design for repairs include:

Temporarily shore east end of bridge superstructure
Demolish and remove east concrete abutment and wing walls
Construct new east concrete abutment on steel H-pile foundation
Jack bridge onto a new east abutment
Repair/replace broken upper lateral bracing
Replace all corroded steel truss tension rods
Replace corroded lower lateral steel bracing rods
Replace broken timber curbs
Remove and replace broken or decayed sidewalk deck planks
Replace broken or decayed cantilever sidewalk supports
Widen/expand west abutment for sidewalk bearing
Chink stone masonry at west abutment
Reconstruct east approach roadway

Principles of the Secretary of the Interior’s Standards of Rehabilitation and the Burlington Charter were followed for the renovation of this historic structure.

Bolton Falls Penstock Condition Assessment

 

DuBois & King provided a FERC-level inspection and condition assessment report of the existing penstocks at the Green Mountain Power Bolton Falls Hydroelectric Facility located on the Winooski River. The facility consists of an intake structure, two 10-ft diameter welded steel penstocks encased in concrete, two horizontally mounted tube turbines with fixed blades, two generator units, a powerhouse, and a tailrace structure.

The penstocks were visually inspected from the intake structure to the beginning of the scroll case; the combined length of both penstocks is 264 lf. Inspection consisted of visual observations, a visual coating survey, shell thickness readings using an ultrasonic thickness gage, and shell soundings. Portions of the penstocks were inspected using rope access due to a 33 degree inclined section.

A condition assessment report was prepared subsequent to the inspection. This report documented the inspection activities and provided a summary of collected field data, stress analysis calculations, and recommendations.

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