Project Overview

award_icon_profile.alphaShaw Brothers Construction was awarded phase two of a multi-year, three phase infrastructure improvement project located in a residential section of Portland, Maine. The first phase of this project was designed to close an open storm drain system, as well as separate a combined storm and sanitary sewer system. The major elements of the project were the installation of 3,800 feet of 8’X5’ precast box culvert, construction of 1,000 feet of stream channel, installation of a pedestrian bridge over the new stream channel and installation of a 12’ diameter precast Downstream Defender. The Downstream Defender, manufactured by Hydro International, was the largest precast stormwater treatment unit to be installed in the state. In order to install the new stream channel and box culverts Shaw Brothers needed to remove over 6,000 CY of ledge. Due to the close proximity of the residential homes and the City of Portland’s tight restrictions on blasting, Shaw Brothers elected to use their large hydraulic hammers to remove the ledge. By utilizing our in-house hammers we kept more of the work under our direct control and eliminated the risks of damage due to vibration that comes with blasting. In an effort to recycle, the excavated rock was crushed onsite and re-used as slope stabilization, saving on trucking costs and the emissions associated with trucking.

At a Glance

Owner: City of Portland
Location: Portland, Maine
Project Value: $3,060,000.00
Engineer: Sebago Technics
Start Date: January 23, 2009
Completion Date: August 15, 2009

Project Data

Ledge Removal: 6,000 CY
Common Excavation: 8,300 CY
8’x5′ Box Culvert: 3,800 LF
Loam: 1,700 CY
Erosion Control Blanket: 5,650 SY
Rip Rap: 500 CY