Sleepy Hollow Cemetery Pedestrian Bridge and Culvert Rehabilitation Project 

Project:

Sleepy Hollow Cemetery Pedestrian Bridge and Culvert Rehabilitation

General Contractor:

Pecora Contracting, Inc.

Contact:

Nathan Chin, Assist. Public Works Engineer, Engineering Division, 978-318-3210, nchin@concordma.gov

Project Background:

In an effort to address high impoundment of water within the Sleepy Hollow Wetlands caused by beaver activity, the Town of Concord has embarked on a project to rehabilitate the existing drainage infrastructure.  Culverts within the wetlands will undergo cleaning, repair or replacement to help lower the impoundment of water and prevent future flooding caused by the creation of beaver dams.

Scope of Work:

Three culverts within the wetlands will be addressed to help alleviate the impoundment of water within the wetlands while maintaining an adequate water level to address environmental concerns. 

Culvert A

A 36” corrugated metal pipe that runs beneath the walking trail (between Sleepy Hollow Cemetery and Reformatory Branch Trail) will be removed and replaced with a concrete and timber pedestrian bridge and a restored stream bed beneath.  This will allow aquatic and terrestrial wildlife from entering and exiting the wetlands.

Culvert B

A 30”x48” stone box equalizer culvert built beneath the Reformatory Branch Trail will be cleaned and rebuilt as necessary to restore flow.  To mitigate the complete draining of the wetlands, an outlet control structure (OCS) will be constructed in front of the culvert to control water levels and help maintain a water elevation established at 118.1.  This is to provide habitat and protection to the endangered Blanding’s Turtles, which reside within the wetlands.

Culvert C

A 12” corrugated metal pipe that runs beneath the walking trail that bisects the wetlands will be removed and replaced with a 24” corrugated plastic pipe. 

Work is slated to be completed by October 21st, 2016.