WDP performed an extensive geotechnical investigation for this 1.8 million square foot distribution facility constructed within and above previous deep-mined and strip-mined coal fields. The investigation (deep test borings and rock coring) provided design recommendations for foundation and floor slabs, below-grade walls, pavements, and site preparation/structural fill placement including strip-mine backfill remediation, deep-mine collapse potential and hard rock excavation/blasting. WDP provided full-time construction inspection and materials testing for all strip-mine remediation and structural fill placement  operations (approx. 1 million CY), foundation examinations and slab subgrade preparations, concrete placement (approx. 35,000 CY), structural steel and masonry, and paving operations (approx. 28 acres).

Due to WDP's involvement:

• Strip-mine backfills were remediated affording conventional shallow foundations.
• Deep-mine collapse assessment minimized development risks. 
• Bedrock profiling identified hard rock excavation areas and blasting requirements.
• On-site crushing plant permitted strategic fill material blending and placement, thus allowing all on-site materials to be used without off-site borrow. 
• Considerable concrete mix design testing using both flexural beams and test cylinders as well as washed concrete gradations to confirm unreinforced slab design criteria batched using on-site concrete batching facility.

WDP performed an extensive geotechnical and geophysical investigation for this 500,000 square foot distribution/storage facility due to erratic limestone bedrock depths and potential sinkhole/solution cavity activity. The investigation provided design recommendations for foundation and floor slabs, below-grade walls, pavements, and site preparation/fill placement including lime stabilization. The geophysical survey provided limestone bedrock surface profiles and rippability characteristics (seismic refraction) as well as sinkhole/subsurface void detection (electrical resistivity).  WDP provided full-time construction inspection and materials testing for all structural fill placement operations, foundation examinations and slab subgrade preparations, concrete placement, structural steel and masonry, and paving operations.

Due to WDP's involvement: 

• Wet, clayey soils necessitated lime stabilization, thus permitting sitework to proceed in winter months and increasing overall soil bearing strengths. 
• Limestone bedrock profiling identified hard rock excavation areas and virtually eliminated sinkhole/subsurface void development.
• Strategic fill material blending and placement allowed all on-site materials to be used without off-site borrow. 
• Considerable concrete mix design testing using both flexural beams and test cylinders as well as washed concrete gradations to confirm unreinforced slab design criteria.