Excavation

Excavation activities are a major step in the construction sequence on a civil construction project, followed by the subsequent backfilling and soils compaction activities. Basically, there are two methods used to excavate soil. The first is to precision cut, also known as the "surgical-cut" or the "cookie-cut" and the other method is the mass excavation. These excavations are normally used for larger areas or the complete footprint of the construction site. Structural excavations are used in the construction of foundations, retaining walls, slabs-on-grade, head walls, paving, and culverts.

Site Preparation and Earthwork

RECON was contracted to perform site characterization, demolition, remediation, clearing, and final grading on this abandoned lead smelter Superfund site.

Project Features:

• Demolishing 18 areas of industrial facilities
• Excavating, re-grading, and consolidating 11,000 cubic yards of impacted ditch sediments and constructing pond berms and clay caps
• Installing 223,000-square feet of geogrid, 233,000 square feet of geotextile, 550,000-square feet of flexible membrane liner and 550,000-square feet of geosynthetic composite liner
• Stabilizing 70,000 cubic yards of low pH (<2 SU) sediments in a 4-acre pond
• Installing 86 acres of clay and soil cover surface layers.