PA 21 Improvements Plan - Selection!

We are extremely pleased to announce that the SPK Team was selected November 9th for the PA 21 Improvements Plan
for PennDOT Engineering District 12-0!

A project specific open-ended agreement will be executed to perform studies, preliminary engineering, final design, services during construction and right of way acquisition services for the PA 21 Improvements Project. Approximate limits for the project would be limited to the portion of PA 21 between US 19 in Waynesburg to US 40 in Uniontown. An in-depth and complex study will be completed for development and analysis of possible concepts to meet Pennsylvania Route 21 (PA 21) corridor purpose and needs; and to develop design strategies to improve safety and mobility on the transportation network. 

We are excited to begin this new assignment for PennDOT District 12-0!!

S.R. 0019 Section A20

After

Before

Cost: $782,385
Client: PennDOT District 12-0
Contact: Jeremy Shaneyfelt, P.E. (724-439-7321)
Project Letting: October 2021

S.R. 0019, Section A20 (ECMS #76027) - - Greene County - The project consisted of the replacement of the existing slab bridge carrying SR 0019 over Shannon Run with a precast reinforced concrete box culvert. Approach roadway construction was minimal. Wades Run, which parallels S.R. 0019 to the west, was relocated away from roadway in order to accommodate the roadway typical and fill slopes and to minimize future slope maintenance. To mitigate for the stream impacts, items including in-stream log structures and tree plantings were included with the project. Traffic was maintained via detour during construction.

S.R. 0070 Section K10

Cost: $73.3 million
Client: PennDOT District 12-0
Contact: Sean Sepe, P.E. (724-439-7322)
Project Letting: November 2017

S.R. 0031 Interchange (Exit 51) Reconstruction and Dual Bridge Replacement - This project included studying interchange reconfiguration options, and bridge replacement alternatives (dual I-70 mainline bridges over S.R. 0031 with substandard underclearance and one Township Road Bridge over mainline I-70). Safety was a primary design component, particularly with the substandard ramp alignments and weaving patterns. The SPK team evaluated several interchange reconfigurations including a Diverging Diamond Interchange (DDI), a Single Point Urban Interchange (SPUI), and variations with traffic circles at the ramp termini. The final configuration selected for final design was a modified diamond interchange; primarily due to the prevailing topography. Final design included a complex STIC initiative Design/Build traffic control plan to maintain two lanes of uninterrupted traffic in each direction throughout the construction duration. In order to accomplish this, mainline I-70 embankments were widened, structures were widened to allow placement of the concrete longitudinal joints at 6’ or 12’. During construction, a short section of I-70 will have 3 lanes on one side and 1 lane on the other to accommodate bridge construction at the interchange. S.R. 0031 is being widened to include a center turn lane. The length of S.R. 0070 reconstruction is 3.2 miles.