Supply Pond Dam Repairs & Rehabilitation

Repairs & Rehabilitation
Nashua/Merrimack, New Hampshire

This project included significant repairs and rehabilitation of the existing 25-foot high, gravity-type, stone masonry Supply Pond dam.  Design and construction administration included installation of a structural cofferdam, demolition of the existing crest and construction of a new "hydraulically" shaped reinforced concrete crest, installation of new stainless steel hinged flashboards, and a new steel pedestrian bridge across the 30-foot crest.

Work also included installation of low level, slide-type sluice gates, installation of upstream shotcrete facing on the dam, installation of filter soil and tow drains on the downstream embankment, and installation of rip rap for causeway slope protection.