Norfolk Southern Railway
Grove, KY – Double Track Project
Crouch Engineering was engaged to design the 4.5 mile long double track project for Norfolk Southern Railway. The existing single track bridge over Pitman Creek had to be evaluated and redesigned to accommodate a second main line track. The Crouch team performed an inspection and load rating for the existing steel tower / concrete pier / deck girder bridge over Pitman Creek, a tributary to the Cumberland River. The bridge was found to not rate for 286k loading, and during inspection, there was evidence of some member fatigue and failures based on the original design for 263,000 cars.
The Crouch team developed a design not only to restore the existing bridge to 286k loading, and add a second track to the bridge superstructure, but also developed a plan that allowed for the rehabilitation of the existing tower bents without taking the track out of service during the rehabilitation. This allowed NSR to maintain continuous operation, while restoring the bridge to a safe loading capacity, and add the second track.
By using and upgrading the existing bridge substructure, the cost of constructing a new second structure was avoided, saving approximately $3 million.