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.

Route 3 Overpass Bridge

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Project Details:

Owner: NHDOT

Location: Bedford, NH

Structure Type: Overpass Bridge

Cost: $9 million dollar

Projects Overview:

E.D. Swett was the main lead on a $9 million dollar design-build project which provided the NHDOT with a turn-key project along the busy Route 3 corridor in Bedford, NH. This project consisted of rebuilding 1.5 miles of Route 3 with a new alignment, an overpass bridge spanning the Everett Turnpike, removal of the existing Route 3 and overpass bridge, as well as laying back the ledge cut along the highway for future widening. E.D. Swett provided the entire project administration, testing, and QC/QA assurance.