HAMDEN — The town of Hamden has completed a $70 million residential cleanup of its Newhall neighborhood, removing contaminants in the soil that in some cases date back more than 100 years.
The Newhall Remediation Project removed more than 130,000 cubic yards of soil from 240 residential properties containing buy valium fill tainted with lead, arsenic and volatile organic compounds associated with ashes from wood and coal. The Newhall Street neighborhood historically consisted of wetlands that were filled with industrial and household wastes from the late 1800s to the middle of the 20th century.
According to Hamden economic development head Dale Kroop (pictured), half of the funding for the $70 million project came from the state, while the other half came from thee Olin Corp.
The work started in summer 2010 and finished in January. The principal contractor on the cleanup was Sevenson Environmental Services of Niagara Falls, N.Y.
The effort included replacing 80 structures such as sheds, decks and swimming pools; replanting 4,700 shrubs and trees; replacing more than 210,000 square feet of driveways and parking areas; and rebuilding 3.8 miles of sidewalk.
The project area is 18 residential blocks bound roughly by Goodrich Street on the south, Prospect Lane and Wadsworth Street on the east, St. Mary Street on the west and extending north to Remington Street and Augur Street. The area includes the former Hamden Middle School property as well as portions of the Newhall Community Center property.
Much of the industrial waste on the site came from the former Winchester Repeating Arms plant across the city line in New Haven as well as other nearby factories.
While the Newhall residential side of the cleanup is complete, Hamden still must address cleanup at public properties on Rochford Field, Mill Rock Park, a former middle school property, and other residential properties west outside of the Newhall Street area. That work will begin in phases later this year.
In addition, Kroop says that the Hamden Economic Development Corp. received $5 million to undertake significant structural repairs to homes on unstable fill. He says that work is now about two-thirds complete.