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.

Wilmington Country Club Water Impoundment Structure, Wilmington, DE

  • Provided geotechnical engineering for the 21-million-gallon water impoundment structure at Wilmington Country Club.
  • Services included subsurface exploration and well installation, groundwater monitoring, slope stability and seepage analysis, and earthwork recommendations during design and review of the earthwork and engineering consultation during construction.

Nanticoke Distressed Slope, Sussex County, DE

  • Retained to provide geotechnical engineering services for design and construction of slope stabilization measures for a 25-foot-high natural slope on the Nanticoke River.
  • Evaluation included subsurface explorations, laboratory testing and slope stability analyses to evaluate the landslide.
  • Assisted with development of plans for increasing the stability of the existing slope including drains to lower the water elevations, and plantings along the face and shoreline toe.

Natural Gas Pipeline Expansion, Kent County, DE

  • Provided natural resource evaluations and federal and state permitting services for this approximately 5.5-mile utility alignment project.
  • GTA coordinated with FERC, USACE, DNREC Wetlands and Subaqueous Lands Section, and DNREC Natural Heritage and Endangered Species Program, and the Delaware SHPO.
  • Observed the installation of well point systems used to dewatering the open cut sections during construction through water ways.

Woodbridge High School, Sussex County, DE

  • A new high school building and campus including a partial two-story school building with an approximate 150,000-SF footprint with a gymnasium, several outbuildings, drive lanes, parking areas, & SWM.
  • Geotechnical services included recommendations for foundation, slab & pavement support; grading; groundwater control, & utility construction.
  • Construction testing for soil, concrete, structural steel, masonry, and hot mix asphalt construction.

NRG Energy, Indian River Plant AQCS, Sussex County, DE

  • Retrofit two power generation station units with air quality control systems to meet future air pollution requirements.
  • Services included construction observation and testing for micro-piles; auger pressure grouted piles and displacement piles; pile caps, concrete slabs, and structure fills.
  • Forensic evaluations were performed on partially poured pile caps for a byproduct silo.