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Bridge Projects

Bantam Hunt Club
Litchfield, CT

Indigo was retained by a local bridge contractor to visually inspect two bridges along a private access road (Old Forge Hollow Road) for the hunt club and a handful of adjacent residences. Both bridges were compromised after substantial flooding as a result of Tropical Storm Irene in 2011. Recommended repairs included wingwall replacement and repair, tree and debris removal, masonry repointing, filling of scour voids, adding stone slope protection and developing a routine inspection and maintenance plan.


Big Trail Bridge
Sherman & New Fairfield, CT

Indigo was retained by a local bridge contractor (Dave Flatau) to provide civil engineering design and state DOT and local permitting services for roadway relocation and construction of an 80-foot span bridge over a gorge and Quaker Brook. The roadway relocation was necessary due to the close proximity of the former roadway to major water supply wells. The project also eliminated a hairpin turn in the road and an undersized bridge and significantly enhanced safety and visibility. The former roadway was removed and densely planted with native trees and shrubs. The bridge superstructure consists of 60-inch steel beams set on concrete abutments. Timber was selected for the deck and railing due to the rustic and natural setting of the bridge. Due to an untimely passing of Mr. Flatau, the bridge was dedicated to him on Memorial Day 2014.


LaCroix Road Over Beaver Brook
Sprague, CT

Indigo was retained by CLA Engineers to provide peer review, hydraulic analysis and design, FEMA analyses, scour analyses and DOT permitting for this project. This project replaced an undersized and dilapidated bridge and a nearby culvert and, as a result, reopened the roadway that had been closed for years to traffic. The hydraulic analysis was somewhat complex due to multiple structures and vast wetland areas on both sides of the road. Provisions for fish and wildlife passage through the crossings were implemented into the project.


Old Greenwoods Road Over Greenwoods Brook
Sherman, CT

Indigo was retained by the Town of Sherman provide civil engineering design, roadway realignment, hydraulic analysis and design, DOT permitting and construction administration for this project. This project replaced a dilapidated and very dangerous bridge and realigned a skewed intersection. Due to relatively shallow ledge, the bridge substructure consisted of steel H piles drive to ledge and concrete pile caps. The entire bridge was poured in place due to limited work space and overhead utility restrictions.


River Road Over Five Mile River
Killingly, CT

Indigo was retained by CLA Engineers to provide peer review, hydraulic analysis and design, FEMA analyses, scour analyses and permitting for this project. This project replaced an undersized and dilapidated bridge. This bridge was substantially damaged during flooding in March 2010 which resulted in the bridge being closed to traffic. The new bridge is a 60-foot single span bridge with wingwalls and stone slope protection that significantly improves hydraulics and minimizes potential for scour.


Sawmill Road Over Sawmill Brook
Sherman, CT

Indigo was retained by the Town of Sherman provide civil engineering design and construction administration for this project. This project entailed the rehabilitation of a bridge that consists of two 8-foot diameter corrugated metal culverts and one 4-foot diameter metal culvert. Over the years, the inverts of the three culverts had deteriorated. To avoid complete replacement and save substantial cost, a repair plan consisting of grouting the voids beneath the culverts and installing a reinforced concrete inverts was implemented and ten years later is still functioning as designed. The repair plan also incorporated creating a scour pool downstream and inserting native stones into the reinforced concrete inverts to enhance low flow conditions and to facilitate fish passage.


Wimisink Brook
Sherman, CT

Indigo was retained by a bridge contractor initially to provide value engineering services to construct a crossing over Wimisink Brook into a private residential golf community. A traditional span bridge was originally proposed but our team proposed an aluminum arch bridge on concrete footings which saved substantial cost. As a result, Indigo provided civil engineering design, roadway design, hydraulic analysis and design and DOT permitting for this project. The arch spanned the stream which facilitates fish and wildlife passage.