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Challenge
  • Cost-effective in-stream staging that maintained navigable access
Our Solutions
  • Multi-stage causeway
  • Detailed ATON Plan

S.R. 2046 - Section 001 - High Rock Road Bridge over Muddy Run

Mid AtlanticHighways, Streets & Structures
PennDOT District 8-0, York County, PA
  • S.R. 2046 - Section 001 - High Rock Road Bridge over Muddy Run by McMahon Associates
  • S.R. 2046 - Section 001 - High Rock Road Bridge over Muddy Run by McMahon Associates
  • S.R. 2046 - Section 001 - High Rock Road Bridge over Muddy Run by McMahon Associates
  • S.R. 2046 - Section 001 - High Rock Road Bridge over Muddy Run by McMahon Associates

The Pennsylvania Department of Transportation (PennDOT) selected McMahon Associates as the prime consultant to provide preliminary and final design engineering services for the full replacement of S.R. 2046, Section 001 over Muddy Run. The existing 99’ three span, concrete T-beam structure was built in 1928. The new structure on S.R. 2046 consists of two equal spans of 54’-6” and was constructed with pre-stressed concrete spread box beams. Throughout preliminary design, construction alternatives were evaluated to determine the most cost effective means of staged stream diversion and cofferdam locations for both bridge removal and new construction. Due to the low ADT and a feasible detour option, the bridge was closed throughout construction and a detour plan was put in place.

Muddy Run is a Trout Stocking (TSF) and Migratory Fishes (MF) stream (PA Code, Title 25, Chapter 93), and is an approved trout stream as described by the PA Fish and Boat Commission. As such, in-stream construction was prohibited from March 1 - June 15.

Muddy Run is a recreational boating waterway and therefore required an Aids to Navigation (ATON) plan. McMahon developed an ATON plan in coordination with the PA Fish and Boat Commission which included warning signage both upstream and downstream of the project location to alert waterway users of the construction and to help guide users through the project area.

Additional tasks included survey, environmental clearance, right-of-way plans, approach roadway improvements, traffic control plans, and construction consultation. Construction on this $1.7 million bridge was completed in 2017.