27 LOCKE ROAD, CONCORD, NH 03301-5417 TEL: (603)224-0859 FAX: (603)224-3625

QUANTUM CONSTRUCTION CONSULTANTS, llc

The Cummins Pond Dam (Dam #066002) is an earthen dam having a maximum height of 12 feet,

and an overall length of approximately 130 feet. The dam outlet works consist of a 12-foot wooden

stoplog section with mortared field stone masonry training walls and an emergency overflow

channel to the east of the dam. The dam had deteriorated over time and was in need of repair.

Areas of concern iincluded hydraulic capacity and stability of the wooden spillway, settlement of the

embankment dam, seepage at the toe, and leakage through the masonry channel walls.

QCC designed a new spillway with stoplogs and steel stanchions,

and seepage control measures for the earthen embankment. A new

wooden pedestrian bridge crossing over the top of the spillway was

also constructed. Reinforced cast-in-place concrete wall facings

were designed and constructed against the existing mortared field

stone masonry at the spillway structure, leaving the long masonry

training walls exposed to retain the historic character. A new

concrete spillway apron was constructed as well.

QCC prepared applications and coordinated for environmental and

dam reconstruction permits for this project. The project was completed in Fall 2016.

Contact:

Mr. Robert Green

Green Woodlands LLC

PO Box 330

Lyme, NH 03768

greenwoodlands@gmail.com

Dam Engineering Project

Cummins Pond Dam

Dorchester, NH