Fort Delaware State Park Walkway

Fort Delaware on Pea Patch Island in the Delaware River was adding an elevated walkway and raised pavilion to one of the pedestrian trails. The new lookout is directly across from a rookery for herons, egrets, and other water fowl. Bird watching is one of the key activities at this popular tourist destination.

Project Summary:

  • Helical Pile Type: 3.5″ Pipe Piles (.300 wall) / 1-1/2″ Square Shaft batter piles
  • # of Helical Piles: 28 compression / 5 tension
  • Location: Fort Delaware State Park, DE
  • Installation Depth: 45′
  • Helix Plates/Ultimate Pile Capacity: 23 Kips compression / 2 Kips tension
  • Equipment Used: Yanmar 87 E Pro
  • Challenge/Unique Aspect: The construction challenges were typical for remote location projects. All of the material and equipment had to be transferred to the island by ferry. Manpower hours were limited as the installation team was ferried to and from the island by boat in the morning while returning at 4:00 PM in the afternoon. The tight spring schedule and frequent inclement weather events in the middle of a river, created uncomfortable working conditions and frequent construction delays.
  • Danbro Installer: RE ECO Drill LLC
  • Engineer/Architect: CDA Engineering
  • General Contractor: Merit Engineering and Construction