Phase: Construction
Location: Westmoreland County
Anticipated cost: $120.7 million

Project Schedule

Preliminary Design:
Completed
Environmental Clearance:
Completed 11/13/2019
Right-of-way Acquisition:
Completed
Final Design:
Completed
Construction:
2022-2026

Construction Updates & Traffic Restrictions

Single-lane restrictions will be in place between Exit 46A/46B (Route 51) and Exit 49 (Smithton) on Thursday, March 28 from 9:00 AM to 3:00 PM.

Single-lane restrictions on southbound Route 51 between Finley Road and Ridge Road will be in place through March 2024. Occasional northbound restrictions will occur in the same location.  All lanes will be open on the weekends, and all construction activities will be weather dependent.

Construction at the I-70/Route 51 Interchange began in late 2022 and is expected to continue through 2026. Track construction progress with updated construction photos

Project Overview

This project includes improvements to I-70 and SR 51. I-70 will be reconstructed to make this section of I-70 similar to other reconstructed sections of I-70 to the east and west. A Diverging Diamond Interchange (DDI) will be constructed to replace the current substandard cloverleaf interchange at I-70/SR 51.

One mile of SR 51 will be reconstructed and widened from south of Ridge Road to north of Concord Lane/Pfile Lane. SR 51 will also be milled and paved from Concord Lane/Pfile Lane to Harper Drive. Finley Road will be relocated behind the GetGo to form a four-way intersection at Route 981 and a left-turn lane will be added from SR 51 to Ridge Road. Planned improvements are detailed in the project overview video below.

An informational project brochure is available to view online or download and print to share project information with the community.

Project Mapping

View project mapping to learn more details about this area.

PennDOT Contact

Name: Dominec Caruso, P.E.
Organization: PennDOT District 12
Title: Assistant Construction Engineer
Phone: 724-439-7286

Construction Contact

Name: Bryan DeAngelis
Organization: PennDOT District 12
Title: Inspector in Charge
Phone: 724-333-0793

Project Overview Video

Ongoing Construction Activity

Phase 1

Multiple construction activities on existing roadways will continue in 2024.

Route 51 over I-70

The new easternmost structure of the new bridge that will carry the southbound lanes of the DDI traffic pattern is under construction while the existing bridge remains open to traffic.

Wicks installed for embankment remediation
New Ramps

The new DDI ramps will require complex ground improvement work, and crews will place new embankments within the existing cloverleaf interchange this year. Wick drains will be installed to address expected embankment settlement under the new ramps. Near the new Route 51 bridge, column-supported embankments will also be built this season.

I-70

In preparation for the widening of I-70, the Cedar Brook Golf Course Tunnel was extended to the north to allow for the construction of the new westbound offramp in 2024. Other offline work related to widening I-70 will include construction of various stormwater facilities.

Side Road Relocations

The relocation of Finley Road, south of the GetGo station, to create a four-way intersection with Route 51 and Route 981 was completed in 2023. Smith Road to the northwest of the interchange will also be realigned in 2024.

Finley Road Improvements
Wheeling & Lake Erie Railroad Bridge
Wheeling & Lake Erie Railroad Bridge Realignment

Construction of the new railroad bridge began in 2023, including railroad track realignment and ground improvements and permanent embankments.

Phases 1A/1B/1C

Reconstruction West of the Interchange

Full reconstruction of I-70 west of the interchange began in 2023. Reconstruction of this 1,700-foot section of I-70 will require three construction phases:

  • Phase 1A will include the construction of the new westbound shoulder and temporary widening needed to carry westbound traffic during a traffic crossover.
  • During Phase 1B, westbound traffic was moved to the Phase 1A temporary roadway while new westbound travel lanes were built.
  • The new eastbound roadway was built in Phase 1C in 2023.

Matthew Smelser Memorial Bridge Rehabilitation and Reconstruction East of the Interchange

Matthew Smelser Memorial Bridge rehabilitation began in 2023, including painting the existing steel superstructure, steel repairs, bridge dam replacements, deck repairs, and new parapet blisters for future fence installation. Rehabilitation work will require single-lane closures.

Approximately 1,100 feet of I-70 will also be under reconstruction related to the work occurring on the Matthew Smelser Memorial Bridge rehabilitation.

Matthew Smelser Memorial Bridge