Downtown Nashua Riverfront - Cotton Mill Transfer Bridge ADA Project

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Project Details:

Owner: City of Nashua

Location: Nashua, NH

Structure Type: 220' ADA Ramp

Cost: $1.3 million

Project Overview:

This project involved the construction of a new handicap accessible pedestrian connector ramp from the north end of the City-owned Cotton Transfer Bridge to the existing paved pedestrian path that extends along the north bank of the Nashua River. The project is associated with the Downtown Nashua Riverfront Project, which aims to create a continuous riverwalk through a series of boardwalks and paths in downtown Nashua to promote non-motorized mobility and recreational opportunities for the public.

The project included the construction of a 6-foot wide, 220-foot-long handicap accessible pedestrian connector ramp from the north end of the existing Cotton Transfer Bridge to the existing 10-foot-wide, paved pedestrian path that extends along the north bank of the Nashua River.

Other work included landscaping, rehabilitation of the existing truss pier, rock retaining wall construction, underground utility coordination, relocating existing signage on site, and coordinating light pole relocations.

Sewalls Falls Bridge

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Project Details:

Owner: City of Concord NH

Location: Concord, NH

Structure Type: 3 Span Bridge

Cost: $10 million

Bridge Distance: 400 foot

Project Overview:

In order to erect the new $10 million, 400 foot, 3 span bridge, ED Swett installed a 270’ work trestle in the Merrimack River to not only disassemble the existing 100-year-old 2 span truss but as well to construct the new bridge. The new piers sit on 6’ diameter drilled shafts that were installed 12’ into the river bedrock. Sections of the existing bridge were refurbished and erected in the Heritage Park adjacent to the new bridge. Sections of the existing granite block pier were used to construct the retaining wall at the southern abutment to allow the Riverwalk path to be constructed underneath the new bridge.

I-93 Rapid Bridge Replacements

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Project Details:

Owner: NHDOT

Location: Concord, NH

Structure Type: Rapid Bridge Replacement

Cost: $3.5 million dollar

Projects Overview:

To minimize the impact on the I-93 traffic,E.D. Swett was awarded a $3.5 million dollar rapid bridge contract to replace two, 90-foot span bridge decks (one northbound and one southbound). Each deck replacement had to be completed within a time frame of 6:00 p.m. – 6:00 a.m. Friday through Monday, or be imposed with large hourly liquidated damages.In conjunction with the rapid deck replacement, over 3,000 linear feet of temporary jersey barrier had to be moved. To accommodate traffic flows within the closed time frames, the barrier had to be moved twice within the weekend time shut down.