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    Route 4165 Glenfield Viaduct Expansion Dam Repair Activities Begin Monday in Glenfield Borough

    July 01, 2026

    Pittsburgh, PA – The Pennsylvania Department of Transportation (PennDOT) is announcing expansion dam repair work on the Glenfield Viaduct (Route 4165) in Glenfield Borough, Allegheny County will begin Monday, July 6 weather permitting.

    Single-lane alternating traffic will occur on the Glenfield Viaduct which carries Glenfield Street over Route 65 from 6:00 AM to 5:00 PM weekdays through mid-July to allow crews from Allison Park Contractors to conduct compression seal replacement work at the expansion dams.

    Please use caution if traveling on this roadway. Work zone safety is everyone’s responsibility.

    Travelers can check conditions on major roads by visiting www.511PA.com. 511PA, which is free and available 24 hours a day, provides traffic delay warnings, weather forecasts, traffic speed information and access to more than 1,200 traffic cameras. 511PA is also available through a smartphone application for iPhone and Android devices, by calling 5-1-1, or by following regional X alerts. 

    Find PennDOT’s planned and active construction projects at www.pa.gov/DOTprojects. Subscribe to PennDOT news and find transportation results in Allegheny, Beaver, and Lawrence counties at www.pa.gov/DOTdistrict11.

    Find PennDOT news on X, Facebook, Instagram and LinkedIn. 

    MEDIA CONTACT: Nicole Haney, nhaney@pa.gov or 412-429

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