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VTrans Aviation Consultant Engineering

 

DuBois & King was selected to provide multidiscipline airport engineering services for Vermont State Airports. Assignments include:

Runway 01 Safety Area Improvement Project, Rutland – Southern Vermont Regional Airport, North Clarendon. Design of a new 50-ft-wide taxiway parallel to the existing 5,003-ft by 100-ft-wide runway to serve as a staging and taxi area. The project included construction of a 600-ft-long RSA at the north end of the runway, which uses an Engineered Material Arresting System (EMAS) to safely arrest overrunning aircraft. In place of a gravel or sand medium, the EMAS uses crushable concrete blocks installed on top of pavement at the end of the runway. Project included a 55-ft-high retaining wall and relocation of the localizer. Design also included the connection of Taxiway D to the end of the runway, permitting assistance for stormwater, construction stormwater, and Act 250.

Runway 19 Safety Area (RSA) Improvement Project, Rutland – Southern Vermont Regional Airport, North Clarendon. Construction administration and inspection services for the construction of a 600 ft by 400 ft Runway Safety Area on the end of Runway 19.

Apron Design, Newport State Airport, Newport. Design of an aircraft tie-down apron approximately 12,500 square yards and 25-ft taxilane, approximately 200 lf in length. Edge reflectors were utilized along taxilane and around perimeter of apron. D&K prepared plans and obtained permits (stormwater discharge and Act 250) for taxiway, apron, and hangar additions.

Master Plan Updates, Newport State Airport, Newport. Partial update of Airport Master Plan to address FAA revisions to Advisory Circular 150/5300-13. Included updates to portions of existing Master Plan, Airport Layout Plan, critical aircraft information, dimensional information, environmental analysis for airport improvements, airport “Exhibit A” Property Map, and review of safety area requirements. Design for reconstruction/rehabilitation of Runway 18-36 included incorporating turnarounds at each end of the runway, an overlay of the stub taxiway and apron area, pavement analysis, analysis of the safety area at each runway end, and provision for temporary access/taxiway to Runway 5-23 from the apron and hangar area.

Independent Estimate, Master Plan Updates, Newport State Airport, Newport. D&K prepared an independent estimate for airport’s Master Plan as part of the Grant Application process. Provided cost estimate for: Aeronautical and Survey Mapping, Inventory, Forecasts, Environmental Overview, Demand/Capacity and Facility Requirements, Alternative Analysis, Airport Layout Plan and Capital Plan, and Study Documentation.

Plans and Underdrain Studies, MSGP and SWPPP Assistance, 9 State Airports. D&K provided services and plans for an underdrain study for 9 State airports. The scope of work involved on-site reconnaissance and review of existing plans and mapping documents to determine the function and capabilities of surface and subsurface drainage systems for each of the State airports. The completed drainage plans for each airport included the use of ArcGIS software to create site plans showing drainage features and stormwater discharge locations. Services also included assistance for development of a Stormwater Pollution Protection Plan (SWPPP) for these airports for VTrans to submit to the Vermont Agency of Natural Resources.

VT Route 100 Village Bicycle and Pedestrian Study

 

D&K completed a Village Bicycle and Pedestrian and Safety Study for the village area of Lowell and Westfield on Route 100. Both of the communities have safety concerns for pedestrian and vehicle traffic, due to high travel speeds and lack of traffic calming features. A variety of traffic calming and pedestrian safety improvements were evaluated and recommended including road striping, colored surfaces on the roadway shoulders, radar feedback signs, and effective crosswalk markings. The study included both short-term measures for the towns to undertake and longer-term improvements that could be conducted by the State of Vermont during projects for resurfacing or rehabilitating the road.

VT Route 100 Bridge #165 Replacement

 

Bridge #165 was heavily damaged during Tropical Storm Irene and lost one of the two concrete deck slabs. VTrans temporarily created a fill-over structure by installing two large culverts; this significantly reduced the hydraulic capacity of the structure. DuBois & King was contracted by VTrans to evaluate the condition and safety of the bridge. D&K recommended that the bridge be replaced prior to spring run-off. VTrans concurred with the recommendation.

D&K engineers conducted a hydraulic study and retrieved geotechnical soil borings, which were used for the alternatives analysis. D&K compared cost and constructability of alternatives, as well as availability of bridge components. Consideration was given to availability of precast components to fit the construction phasing. The scope of services included complete topographic survey, design of a new 3-sided precast concrete rigid frame structure, and plans and cost estimates for the removal of the existing structure and the construction of a new permanent structure. The bridge was designed to allow phased construction, allowing one lane of traffic to be maintained at all times. D&K staff designed the detour layout and provided construction oversight.

VT Route 14 Sidewalk

 

As a result of an increasing number of pedestrians, lack of pedestrian facilities, and high traffic speeds along VT Route 14, DuBois & King provided design and construction phase services for a 1,740-ft by 5-ft-wide bituminous sidewalk along the west side of VT Route 14, including construction of two new pedestrian bridges and the addition of two crosswalks and a connector sidewalk. The project was funded by a Transportation Enhancement Grant, developed through the VTrans Local Transportation Facilities (LTF) Section, and followed the LTF Guidebook.

Professional services included identifying cultural and natural resource concerns, soliciting input from project stakeholders, preparing Conceptual Plans and a Categorical Exclusion document, permitting, public meetings, preparing Preliminary and Final Plans and Contract Documents, developing a floodplain study and flood rise analysis, utility coordination, and preparing right-of-way plans.

VT 62/Fisher Road/Airport Road Intersection Study

 

D&K conducted a Scoping Study to identify alternatives to improve safety and enhance traffic capacity at this busy intersection. D&K transportation engineers developed existing and future traffic volumes, evaluated traffic data and crash history, consulted with VTrans Sections for relevant issues, compiled current and planned development information, and investigated local and regional concerns. Developed several alternatives including the addition of turn lanes, a jughandle, reconstruction of the intersection as a roundabout, and retiming of the traffic signal.

D&K developed preliminary alternatives for presentation and discussion at review meetings, developed a conceptual sketch of each alternative suggested for the intersection, developed alternative cost estimates, conducted natural and cultural resource investigations, and identified permitting requirements. DuBois & King prepared an evaluation matrix with a concise summary of the different alternatives that were developed and completed a final report.

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