Ongoing and successive, multi-year retainer contracts for design services for roadway improvement projects throughout the State. Services include design for pavement reclamation, overlay and rehabilitation, drainage assessments and improvements, guardrail improvements, bridge joint replacements, bridge railing replacements, pavement markings, and roadway sign updates. Services include field survey, base mapping, engineering design and plans development, permitting, and cost/quantity estimation. All design services are completed in accordance with VTrans Standards including use of English units and Microstation/InRoads. D&K transportation engineers have completed the design of over 150 miles of roadway improvements.
USDA Forest Service Kiasutha Recreational Area
Inspection, evaluation, and design of improvements to the Kiasutha Recreational Area located in the Allegheny National Forest. Performed inspections of the project site to make improvements for new campsite locations, orientation, accessibility, slopes and grading, drainage, and utility connections. Services included:
Field Survey/Data Collection. Survey and inventory/base maps.
Roadway/Transportation. Design of cul-de-sacs, new parking areas, new roadway sections, replacement of culverts, new drainage ditches, and riprap ditch lining.
Campsite Improvements. Design for improvements and construction of new campsites.
New Campground Loop. Design for new campsite loop including 20 campsites.
Site Design. Design of amphitheater, two playground areas, and accessible pathways.
Facility Improvements. Water, electric, and sewer upgrade design including shower/restroom buildings, and picnic pavilions.
Water System Improvements. Design for new waterlines and replacement of existing waterlines including new valves, stops, and water system drains.
Sewer Systems. Design for new and rehabilitation of sewer lines and manholes, correct infiltration and inflow, and new hookups for campsites.
Electrical System Improvements. Upgrade and design of new electrical services and equipment, and increased capacity upgrades.
NHDOT NH 155 Planning and Design
Design services for reconstruction of approximately 2,500 ft of the structurally deficient NH Route 155 (Knox Marsh Road) roadway across a main line bridge over the Boston & Maine Railroad in Madbury. The project involved approximately 0.7 miles of NH 155, the relocation of one-quarter-mile of Pudding Hill Road, and the rehabilitation of portions of Pudding Hill Road.
Services included improvement study, conceptual alternatives, preliminary engineering and data collection, design, site review, construction traffic/access maintenance plan, construction phasing, cost estimates, and final design of all roadway work. Work involved preparation of preliminary, right-of-way, slope and drain, and traffic control plans; erosion control measures; relocation of a 24-inch water main; and removal of an existing and construction of a new bridge over the Boston & Maine Railroad.
Design issues included clearance over the railroad track, the close proximity of Pudding Hill Road/NH 155 intersection, driveway access in close proximity to the bridge, a major drainage culvert at the bridge, impacts to cultural and historical resources, and maintenance of traffic during construction.
Glenwood Avenue Reconstruction
Street and infrastructure upgrade and replacement program for reconstruction of approximately 5,900 ft of Glenwood Avenue. Full-depth street reconstruction and geometric design acknowledged and integrated existing traffic sensing/signalization systems at major intersection. Services included concrete sidewalk with granite curbing replacements to improve pedestrian safety and accommodate wider roadway width, landscape improvements, and guardrail modifications. Design included handicapped ramps, relocation of power poles, hydrants, water shut-offs, mailboxes, and matching existing residential walkways.
Provided stormwater analysis of project area for return frequency storms up to 100 years, including drainage systems/areas contributing runoff to Glenwood Avenue. Based on existing system condition (“old” clay tile piping and root intrusions), the design replaced 3,100-lf of sanitary sewer.
Completed topographic surveys, right-of-way and easement delineation, stormwater analysis reports and design, wetland delineation and permit application, utility coordination/utility pole relocation, retaining walls, sedimentation/erosion control plan, final design drawings, bid assistance, and construction phase services.
DuBois & King established an aggressive design schedule to deliver sanitary sewer design within 75 days of Notice to Proceed. Schedule allowed phased approach to construction in accordance with the City’s priorities and funding availability.
Fourth Street Reconstruction
DuBois & King provided survey, design, and construction services for the $2.1 million street, bridge/culvert, and utility reconstruction of the Fourth and Washington Street areas. Design addressed service and capacity issues to improve the water, stormwater system, and sanitary sewer system. Sewer system was replaced due to age, material (clay), and capacity limitations; and water main was replaced with 12 inch and 16 inch water mains to complete water system looping and capacity improvements. Completed stormwater analysis for project area for return-frequency storms up to 10 years and design of stormwater drainage system to accommodate 10-year storm frequency for the newly reconstructed streets. A complete reconstruction of the roadway surface was provided, including concrete sidewalks with vertical and sloped granite curbing and handicapped ramps. Challenges for sidewalk portion included relocation of power poles, hydrants, water shut-offs, mailboxes, etc., and matching existing residential walkways. Project included:
6,000 ft of water main replacement
3,000 ft of new sewer
3,700 ft of new storm drains
5,400 ft of vertical and sloped granite curbing
4,000 ft of street reconstruction with concrete sidewalk
1,700 ft of pavement overlay
Two culvert spans
Guardrail and pavement markings
Bid assistance and construction phase services