Conn. DOT Project No. 065-098
F.A.P. # HPP-STPR-H026(1)
Town of Harwinton Route 4 & 72 Intersection
Realignment of Route 4, Route 72 and Woodchuck Lane

Owner: Connecticut Department of Transportation

Consulting Engineer:
Dewberry-Goodkind, Inc.
Engineer: Mark Witek
Phone No. 203-776-2277

Project Summary:

Supreme Industries, Inc. was awarded and performed all the construction operations related to the Realignment/Reconstruction of the Intersection of Route 4, Route 72, and Woodchuck Lane. The project consisted of major earth excavation and placement of fill, approximately 37,000 cubic meters of excavated material for proposed Route 4 and 52,000 cubic meters of fill for proposed Route 72. Installation of new storm drainage consisting of enclosed systems, Eljan slope drains, and vegetated swales. Construction of a wetland mitigation site including various seeding applications and shrub plantings. Environmental permits required temporary diversion of Rock Brook utilizing cofferdams and a temporary 1200mm aluminum pipe prior to the demolition of the existing concrete box culvert and permanent placement of the twin, (1800mm, 2400mm) helical corrugated aluminum pipes with cast-in-place concrete end walls and wing walls. Environmental compliance and adherence to permit regulations are maintained utilizing Best Management Practices in conjunction with DOT, OEP, and DEP officials. Sediment, erosion, and managing storm water were accomplished through use of standard sedimentation control systems combined with the use of temporary slope drains and sedimentation traps. Maintenance and protection of traffic was achieved through staged construction and alternating one-lane traffic which is necessary to complete 850 meters of full depth roadway reconstruction and other associated safety operations. Utility relocation was performed in conjunction with staging/roadway construction which included placement of approximately 300 meters of temporary conduit to satisfy CL&P, SNET, and CATV.

1. Environmental compliance: Adherence to permit regulations is being maintained by utilizing Best Management Practices in conjunction with DOT, OEP, and DEP officials. Sediment, erosion, and managing storm water were accomplished through use of standard sedimentation control systems combined with the use of temporary slope drains and sedimentation traps.
2. Construction of a wetland mitigation site requiring the removal of non-native flora and the placement of compost/topsoil mix, seeding, and shrub plantings in this environmentally sensitive area.
3. Replacement of an existing concrete box culvert with 1800mm and 2400mm helical corrugated aluminum pipes with cast-in-place concrete end walls and wing walls carrying the East Branch of Rock Brook. This work was accomplished utilizing concrete block cofferdams and a 1200mm aluminum pipe for temporary drainage to divert the watercourse.
4. On Route 72, the roadway was closed from June 1 to October 1, 2002, to allow for construction activity to proceed at a quickened pace. The relocation of Route 72 involved a fill section of approximately 7 meters. Utility company relocations were coordinated and performed in conjunction with the contractor’s activities, temporarily relocating the utility lines underground until poles can be replaced. Construction of the roadway included subbase, base, and bituminous concrete courses. Stabilization of slopes with turf and crushed stone.
5. On Route 4, traffic has been maintained through staged construction and alternating one-way traffic during periods of construction. The relocation of Route 4 involves the realignment of a curved segment of roadway through a cut section of approximately 8 meters. The cut section along Route 4 required a slope drainage system to be installed to intercept water that might otherwise leach from the cut slope onto the roadway below.