NTM provided support to Trumbull Corporation for hydrologic and hydraulic (H&H) analysis of the Delaware River and permit modifications for the Scudder Falls Project. The project included performing H&H analysis for the temporary construction conditions for the Interstate 95 (I-95) crossing over the Delaware River (locally known as Scudder Falls Bridge). The Scudder Falls Bridge spans the Delaware River, connecting Ewing Township, New Jersey and Lower Makefield Township, Pennsylvania. Construction of the proposed Scudder Falls bridge will require temporary disturbances within the stream channel.
A temporary trestle causeway will be required for the construction on the proposed piers and demolition of the existing piers. The temporary causeway will be a trestle to minimize obstruction to flow and river bottom impacts. The purpose of the current hydraulic study is to demonstrate that the temporary trestle will not increase water surface elevations relative to existing conditions by more than 1.0-foot for the 10-year event, to demonstrate that stable stream channel velocities will be maintained during construction, and to demonstrate that the temporary trestle will pass the 2-year event without overtopping.
The Scudder Falls Bridge replacement project had ACOE, PADEP and NJDEP approval that required modifications to address the changes to temporary construction. NTM developed the permit modification documents, coordinated with the agencies and obtained approved permit modification for the project in a compressed schedule in order to meet initial construction start timeframes.