Newport at Overton Rise – Cobb County, GA

Urban Precision Under Pressure: Earth Development Excavates and Installs Complex Infrastructure for Newport at Overton Rise

Faced with solid rock, limited cover, and tight urban constraints near I-75, Earth Development executed precision blasting, advanced shoring, and full infrastructure installation for a below-grade parking deck, completing the project safely and on schedule within one of Cobb County’s most challenging sites.

The Challenge

The proposed apartment project site was pre-graded as part of an adjacent previous development, leaving solid rock and a minimal amount of cover dirt. Our team had to excavate for a five-story parking deck with three stories below grade at the back of the Overton Park Drive easement. This project required a twenty-four vertical sheer cut to install a complex shoring system in solid rock without ample cover material within a tight urban footprint and adjacent to I-75.

The proposed infrastructure proved to be as challenging as the grading operation with an existing sanitary sewer line reroute in solid trench rock and two massive water quality units.

Earth Development’s Actions

We implemented a split-face drilling pattern, utilizing sequenced blasting charges and an extensive volume of blasting mats. Our team mobilized a total of six track drilling rigs to accomplish the critical path schedule. Cobb County Police Department orchestrated rolling stops on Interstate 75 during every shot.

Skilled team members crushed the onsite rock into structural fill, and employed advanced shoring/backfill methods due to tight site constraints.

Results

This highly visible development was completed safely and efficiently due to Earth Development’s field execution and planning. Our collaborative partnership with the GC was a benchmark for coordination under pressure.

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