Trenton-Mercer Airport (TTN)

Multiple Expansion Parking Lots & Facilities, Ewing Township, Mercer County, New Jersey

The project consisted of the rehabilitation of the existing terminal parking lot, expansion of an adjacent parking lot and the construction of a new employee/rental car/cell phone waiting parking lot. Upon completion of the project a total of over 1100 parking spaces are now available at the terminal. One of the key components of the project was the installation of a paid parking system that would allow the County of Mercer to charge users for parking. The system included a computer-based parking control system, gates, and automated pay stations.

Van Cleef Engineering Associates worked in conjunction with C & S Engineers from Syracuse, New York to develop complete site plans, construction plans and specifications for the project. Van Cleef Engineering Associates provided all grading, drainage, and stormwater design along with all agency approvals. Agency approvals included Ewing Township Planning Board, Mercer County Planning Board, Delaware and Raritan Canal Commission and New Jersey Department of Environmental Protection wetlands permitting. The design and permitting services for this project had to be expedited so that construction could occur during a two-month airport shutdown period.

After the project was bid and awarded, Van Cleef Engineering Associates provided construction management, construction administration and construction inspection services. The entire project was completed within two months so that the new parking lot would be available for the grand reopening of the airport following the two-month shutdown.

The parking lot expansion project was one of three major construction contracts that were undertaken by the County of Mercer during the two-month shutdown of the airport. Van Cleef Engineering Associates continues to work with the County of Mercer at the Trenton-Mercer Airport to develop additional remote parking lots as the airport expands and Frontier Airlines expands their services from Trenton-Mercer Airport.


  • Complete Site Plans
  • Multiple Agency Approvals, including:
    • Ewing Township Planning Board
    • Mercer County Planning Board
    • Delaware & Raritan Canal Commission
    • NJ DEP Wetlands Permitting
  • Construction Plans and Specifications
  • Grading Plans
  • Drainage Plans
  • Stormwater Management Design
  • Construction Management
  • Construction Administration
  • Construction Inspection