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Project Limits:

Approximately 300 feet south and north of the bridge along Paper Mill Road.

Project Need:

The bridge consists of one 121" x 77" aluminum pipe arch. There are significant perforations along the pipe and a large erosion hole. Due to the structure's diminishing structural integrity, the existing pipe has been deemed structurally deficient by the Pontis Bridge Management System and ranked 77th in DelDOT's 2013 Bridge Deficiency Ranking. Therefore, a project has been initiated to replace this structure.

Project Overview:

This project involves rehabilitating the existing structure, a 128 foot long 120” x 80” corrugated aluminum pipe arch, by lining it with concrete. An 86 foot long 8ft x 8ft box culvert will be constructed next to the existing structure to connect the adjacent bicycle/hiking trails in the parks on each side of the roadway. Additional work includes reconstruction of the existing roadways, guardrails, and drainage structures. A stream restoration will be completed approximately 600 ft upstream and 300 ft downstream of the existing structure on Middle Run. The stream restoration involves widening the floodplain through excavation of the channel’s legacy sediments and placement of recessed logs throughout the channel and floodplain to prevent scour and add habitat.

Project Timeline:

Design Phase:

Design work to be completed no later than early 2019

Construction Phase:

Construction work to begin Spring, 2019. The road will be fully closed (see detour info) for approximately 2 weeks for construction of the structure. Stream work will occur for approximately 4 months under lane shifts. Construction work to be completed Fall, 2019.

Additional Comments:

As part or Middle Run Valley Park's bike trail system, there is a bike trail that rides through this pipe. This portion of the bike route will be temporarily closed during the construction of this project.

(Reviewed and updated on 5/25/2018)