Tunnels & Culverts

Owner: Maryland Transportation Authority Removal and replacement of deteriorated concrete in the fresh air duct which runs under the I-95 roadway in the tunnel. Both overhead and vertical work; completed at nighttime only. Weather is a major factor is getting access to the site; if rain or snow, no tunnel closure and therefore no work. [...]

This bridge had severe spalling at the waterline. Two contractors had previously attempted to effect the repairs using form and pump methods which were singularly ineffective. CGCC offered the FLDOT a 3 year “no crack” guarantee as enticement to attempt a shotcrete rehabilitation. As of 2010, it has been 5 years without a call-back. 5000 [...]

This 40 year old storm sewer runs underneath a major apartment building and adjacent parking lot in downtown Rockville, MD. The storm sewer was corroding and starting to buckle in several locations. This project was bid with 2 options, the first being slip-lining and the second being shotcrete. The bids for rehabilitating the CMP with [...]