PA Bridge SR4022 and PA Bridge SR1016

Project Story

This District 12 PennDOT Open End Agreement involves the replacement of two structurally deficient bridges. Fisher’s scope of work includes preliminary and final bridge design, roadway design, traffic control, hydraulics, survey, environmental and permitting, as well as construction services. The projects are located within Washington County along SR4022-B10 over Branch of Buffalo Creek (BMS 62 4022 0050 0000) and SR 1016-A20 over Branch of Mingo Creek (BMS 62 1016 0010 0473).

SR 4022 – B10 over Branch of Buffalo Creek – The existing SR4022 structural deficient bridge is currently posted for 22 Tons and consists of a single-span, steel I-beam bridge supported by reinforced concrete abutments. The current bridge width restricts traffic to one lane on a two lane road with a curb to curb bridge width of 14’-0”. The existing structure has a total structure length of 38’-0”. The proposed bridge will replace and widen the existing structure to match the existing roadway width. To accommodate the widen bridge width, a new alignment was developed. The anticipated bridge type will consist of Composite P/S Concrete Boy Beams supported by Integral Abutments with piles set behind the existing abutments.

A detailed HEC-RAS analysis of the creek was completed to determine the design flood profile and the needed bridge opening to pass the design flood without significantly raising the 100 year water surface elevation.

SR1016-A20 over Branch of Mingo Creek – The existing SR1016 structurally deficient bridge is currently weight restricted and consists of a single-span, steel I-beam bridge supported by reinforced concrete abutments. The current bridge width restricts traffic to one lane on a two lane road with a curb to curb bridge width of 14’-0”. The existing structure has a total structure length of 24’-0”. The proposed structure will replace and widen the existing structure to match the existing roadway width on the existing alignment. The anticipated structure type will consist of a Precast Reinforced Concrete Box Culvert with Precast Reinforced Concrete End Sections.

A detailed HEC-RAS analysis of the creek was completed to determine the design flood profile and the needed bridge opening to pass the design flood without significantly raising the 100 year water surface elevation.

The scope of work will include the replacement of the existing structure as well as the reconstruction of the approach roadways, including a landslide repair along the northwest side of the far approach. An additional section of SR1016 roadway to the north of the structure will be included in the project to repair an area of roadway embankment failure between the existing edge of roadway and the stream.