The U.S. Army Corps of Engineers, New England District, is proposing streambank protection project to stabilize some 300 feet of riverbank along the Chelsea River in East Boston, Mass.
Continued long-term erosion of the riverbank will continue to endanger other areas at this site that are subject to tides. The need for the project is to ensure the protection of public infrastructure.
The project area lies in East Boston along the Chelsea River in the vicinity of Condor and East Eagle Streets. The area of shoreline erosion is a small inlet near an industrial building.
The recommended plan consists of placing stone protection along the 300-foot section of eroding bank extending from the toe, to the mid-height of the riverbank. The stone protection would consist of a 24-inch layer of rip-rap on a 1:2 vertical to horizontal slope underlain by a 1 foot layer of gravel bedding. A 4-foot high stone berm would be constructed in the river approximately 25 to 30 feet from the riverbank with the crest of the berm extending approximately two feet above the riverbed.
Approximately 1,500 cubic yards of material will be excavated and 650 cubic yards of gravel fill installed and 1,200 cubic yards of topsoil installed. Around 1,600 cubic yards of rip-rap will be placed along the lower base of the riverbank.
Construction is planned to begin during the fall of 2016 or later, and take several months to complete.