Market - Bridges & Tunnels

The Residences at Mid-Town Park, City of Wilmington, DE

  • Subsurface exploration, laboratory testing, geotechnical engineering, and COT services.
  • Shear wave tests and post construction dewatering recommendations for foundation and pavement design.
  • 417,000-SF, 3 levels of underground parking for 511-cars, requiring excavations of about 32 to 44 feet.
  • 5-story and a 7-story buildings connected by pedestrian bridge, retail, 198 apartment units, elevated courtyard, and resort-style swimming pool.

Mine Road Bridge, Stafford County, VA

  • Designed abutments and wingwalls for a Geosynthetic Reinforced Soil – Integrated Bridge System (GRS-IBS) for the 120-LF bridge.
  • Bridge abutments were 30′ tall & able to be supported on shallow foundations despite low allowable soil pressure.
  • The GRS-IBS wall system eliminated the need for deep foundations or a multi-span bridge. This solution accelerated bridge construction and minimized earthwork, wetland impact, construction cost and life-cycle cost.

I-495 Emergency Bridge Repairs, Wilmington, DE

  • Provided emergency response and corrective action services including subsurface exploration and geotechnical engineering services to repair BR1-183 on I-495 over Christina River.
  • Performed 12 CPT soundings with pore pressure dissipation tests.
  • Monitored pore pressure through monitoring wells, pressure transducers and vibrating wire piezometers for approximately 12 months.