Nagog Pond

Nagog Pond Intake Replacement

Project Manager

Alan Cathcart

Concord Pubic Works Director

Design Engineer

Environmental Partners

Quincy, MA


D&C Construction 

Weymouth, MA

Open Lake with Trees in Background


FEBRUARY 25, 2021 - 7:00PM



To Participate Remotely:

Please click the link below to join the webinar:
Telephone: (for higher quality, dial a number based on your current location):
US: +1 312 626 6799  or +1 646 876 9923  or +1 301 715 8592  or +1 408 638 0968 or 
  +1 669 900 6833  or +1 253 215 8782  or +1 346 248 7799

Webinar ID: 957 0582 0422


  • No participant ID is needed, just press # when asked. 
  • Telephone users may dial *9 to request to speak. 
  • Computer and app users may use the “raise hand” feature to request to speak.

Agenda - Nagog Public Information Session - Feb 25, 2021

Project Summary

The Town of Concord (the Town) is in the process of making comprehensive improvements and upgrades to its existing surface water supply known as Nagog Pond, which has been utilized by the Town as a water supply since the early 1900s. As part of these improvements, the Town intends to replace the existing 16-inch cast iron intake pipe with a new 16‐inch inside diameter (ID) high density polyethylene (HDPE) intake pipe.

The existing intake pipe extends approximately 1,800 feet into Nagog Pond from the gatehouse at the dam and is partially supported by wooden cribbing in some areas and is covered by sediment in others. Physical inspections of the intake pipe have indicated that it has significantly deteriorated, resulting in decreased hydraulic carrying capacity and risk of failure. Due to the condition of the existing intake pipe, the Town is replacing it with a new 16‐inch ID HDPE pipe, which includes an intake structure with an intake screen and automated air burst cleaning system.

The proposed work includes two phases of construction. Based on the plan of work proposed by the selected contractor, the first phase of the project will involve deep water work which will include fusing and floating of the intake pipe along the water surface and then submerging it into position, followed by a later phase of work that will involve dewatering and limited dredging performed along a portion of the shallow pond bottom (the cove).  

Updated 9/17/2020

2021 Project Updates

Project Schedule

  • Bid Deadline – June 17, 2020
  • Substantial Completion – December 31, 2020
  • Contract Completion – February 26, 2021

Project Documents

Town of Acton - Project Liaison

Matthew Selby (Selby)

Director of Land Use and Economic Development

Town of Acton

Phone: (978) 929-6440