TRC was retained by the Delaware River Joint Toll Bridge Commission (DRJTBC) to provide the required test boring services associated with a replacement of the existing Scudder Falls Bridge which is a heavily-used commuter route carrying I-95 over the Delaware River between Pennsylvania and New Jersey. The massive, $310 million project when completed will include: new northbound and southbound structures, 4.4 miles of approach roadway improvements between the Pennsylvania Route 332 Interchange and the Bear Tavern Road Interchange in New Jersey, and reconfiguration of the Taylorville Road Interchange in Pennsylvania and the Route 29 Interchange in New Jersey including all associated ramps and structures.
The subsurface boring and sampling work encompassed a total of 330 test borings, 32 test pits and 110 pavement cores. Twenty-seven of the borings were made in the Delaware River to cored depths of up to 90 feet using a specialized rubber-tired water buggy with a mounted drill rig. Water levels were approximately 3 to 4 feet in depth.
With a large amount of the work completed adjacent to I-95 and various roadways, Maintenance and Protection of Traffic for the project was particularly demanding. Work was complicated by time restrictions and challenging control patterns that were governed by the rules and regulations imposed by Pennsylvania and New Jersey who each has their own required patterns.
A total footage of 13,980 feet was drilled for the project under the original scope which consisted of 10,785 feet of soil borings and 3,195 feet of rock coring. Six (6) drill rigs of varying configuration (truck-, track-, and buggy-mounted) were mobilized to complete the original scope of work for the project a staggering two months ahead of schedule.
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