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40 Green Street Development
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The 40 Green Street complex consists of 650,000 square feet of professional office, retail, and hotel development that abuts Route I-95/128 and is near the Route 20 interchange. The site is also within the public water supply for the City of Cambridge.
To alleviate existing traffic problems at the I-95/Route 20 interchange and address future traffic impacts associated with the development, the existing Route 20/I-95 interchange will be reconstructed, requiring a new overpass and widening of existing overpasses. The interchange will also be extended to Route 117, alleviating existing traffic congestion on local roadways.
As the site is within a public water supply, water quality generated from storm water runoff is a prime concern. There is also an existing outfall on the site that collects runoff from a one-mile section of Route I-95/128 and adjacent areas that is the most problematic of all the discharge within the 36,000-acre watershed. Working in concert with the City of Cambridge, the City of Waltham, and the USGS, the upstream watershed will be studied, and Best Management Practices will be developed to upgrade the discharge from this area to meet current standards.
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