Muddy River Flood Damage Reduction - Phase 2, Boston and Brookline, Massachusetts

Muddy River Flood Damage Reduction - Phase 2: Work consists of dredging 1 to 8 feet of sediment from the bottom of the river to construct the Flood Risk Management channel, stabilizing the material for transport, and trucking the material for disposal in landfills. Excavate the river in the Back Bay Fens area of the Muddy River. Excavate five stretches of the Riverway section of the Muddy River. Excavate the sandbar and island at Leverett Pond. Excavations may be performed mechanically in wet conditions or by the establishment of water diversion structures with excavation performed in dry conditions. Handling, characterization and disposal of excavated material is required. As part of the work, provide additional flood protection at the Boston Fire Department Fire Control Center in the Back Bay Fens. Eradicate phragmites in the Back Bay Fens and Riverway areas where indicated to achieve flood damage reduction. Restore wetland vegetation in excavated areas by planting appropriate emergent wetland plants. Restore riparian vegetation in upland areas where phragmites are eradicated by planting trees and shrubs. Restore vegetation and other landscape features disturbed at staging areas and within the limit of work. Installation of boulders and habitat logs for fish, turtles and amphibians. Significant incidental work necessary to accomplish the work described above includes: control of river flow; control of ground and surface waters; pedestrian and vehicular traffic control; pedestrian management; protection of historic structures and landscape features to remain; invasive species control and selective clearing of vegetation; and maintenance of all restored areas within the limit of work.

Division 02 -	Existing Conditions, Environmental Assessment, Natural Environment Assessment, Water Remediation.
Division 31 -	Earthwork, Caissons, Excavated Caissons.
Division 32 -	Exterior Improvements, Operation and Maintenance of Exterior Improvements, Base Courses, Aggregate Base Courses, Wetlands, Wetlands Restoration, Irrigation, Planting Irrigation, Planting Preparation, Soil Preparation, Landscape Grading, Turf and Grasses.
Division 35 -	Waterway and Marine Construction, Waterway and Marine Construction and Equipment, Dredging.