In a flash from the past, the Greenfield Bridge will completely close for maintenance related to its original construction. The closure will begin on Monday, 21 September 2020 at 7:00am and last approximately 30 days.
Here’s the press release from the City of Pittsburgh’s Dept of Mobility and Infrastructure. (Emphasis added.)
PITTSBURGH, PA (September 15, 2020) The City of Pittsburgh’s Department of Mobility and Infrastructure (DOMI) will implement a full closure of the Greenfield Bridge between Schenley Park and the Greenfield neighborhood starting at 7:00 a.m., Monday, September 21, 2020.
Mosites Construction Company, the contractor who built the bridge, will be addressing several outstanding issues that will ensure the longevity of the structure. The concrete deck surface will be milled and overlaid with a 1-1/4” thick concrete wearing surface meant to ensure water does not permeate into the deck. Also, the protective coating on the east bridge barrier will be replaced to address flaking and peeling that has been observed.
This work will take approximately 30 days during which time the bridge will be closed to all vehicle and pedestrian traffic. Traffic will be detoured via Beechwood Boulevard, Forward Avenue, Murray Avenue and Beacon Street. There should be no impact to travel on I-376 below.
— press release from City of Pittsburgh DOMI, 15 September 2020
They are replacing the deck because, according to the Post-Gazette there is material defect and some voids in the surface that will allow water to get into the concrete and crack the deck. These defects were noted during final inspection before the bridge opened in 2017. This did not delay the opening and is being addressed by Mosites now at no charge.