Bridge Collapse (PGH): Three Years Later

Posted on January 29, 2025 by Carolyn Ristau

Three years ago, Pittsburgh’s Fern Hollow Bridge collapsed on a cold and icy morning. Since then, I have periodically checked in on the status of the new bridge, the fallout from the collapse including the Mayor’s new Commission on Infrastructure Asset Reporting and Investment, and the condition of other bridges, particularly those closed for safety reasons since the Fern Hollow Bridge collapsed.

At my last check-in one year ago, the National Transportation Safety Board’s investigation was still on-going with the latest update on their website a year old. The investigation wrapped up shortly after and the NTSB’s final report was issued in March 2024 (WTAE, March 22, 2024). Unsurprisingly, the report found that the City’s failure to act on the maintenance and repair recommendations from years of inspections led to the structural failure of the bridge. Specifically:

On Friday, January 28, 2022, about 6:37 a.m. eastern standard time, the Fern Hollow Bridge, which carried Forbes Avenue over the north side of Frick Park in Pittsburgh, Allegheny County, Pennsylvania, experienced a structural failure. As a result, the 447-foot-long bridge fell about 100 feet into the park below. The collapse began when the transverse tie plate on the southwest bridge leg failed due to extensive corrosion and section loss. The corrosion and section loss resulted from clogged drains that caused water to run down bridge legs and accumulate along with debris at the bottom of the legs, which prevented the development of a protective rust layer or patina. Although repeated maintenance and repair recommendations were documented in many inspection reports, the City of Pittsburgh failed to act on them, leading to the deterioration of the fracture-critical transverse tie plate and the structural failure of the bridge.
NTSB: Collapse of the Fern Hollow Bridge

News

Below are the news updates on the Fern Hollow Bridge and other bridge maintenance and replacement efforts in Pittsburgh and Allegheny County.

The National Transportation Safety Board’s investigation into the collapse of the Fern Hollow Bridge is completed.
Immediately after the Fern Hollow Bridge collapsed, the City created a Commission on Infrastructure Asset Reporting and Investment. However, it took Mayor Gainey about 18 months to nominate any commissioners and another 5 months for the commission to have its first meeting on December 5, 2023. Despite finally existing, it still hasn’t been added yet to the city’s website listing all Boards and Commissions. It does have an official city website though. The first report from the Commission to City Council was issued on June 5, 2024. In the cover letter, the Commissioners acknowledge that they are charged with reporting to council at least twice a year.
The Charles Anderson Bridge was immediately closed to vehicular traffic on February 1, 2023. On November 4, 2024, the bridge was closed to bicycle and pedestrian traffic as construction was finally underway for rehabilitation of the bridge (the process started in 2019). The Panther Hollow Overpass is also being improved while the traffic is detoured. (Pittsburgh Engage project page)
Pittsburgh’s Swindell Bridge, which closed initially from July to September 2022 due to falling debris. The expectation was that repairs that summer would enable the bridge to fully reopen to traffic. Instead the latest repairs seem to have uncovered more issues. The bridge will eventually undergo a full rehabilitation, which will require another closure during construction. However, that will not be for some time as the bridge is still in the preliminary design phase. (Pittsburgh Engage page)
The “complete overhaul” of the South Negley Avenue Bridge announced in 2022 (CBS, February 25, 2022). The city still does not have a project page for this bridge, though both sidewalks have been closed for safety (Mayor’s Press Release, June 6, 2024; Mayor’s Press Release, June 17, 2024). The obvious deterioration on this bridge and lack of movement on repairs leaves the way open for speculation on whether we will have another bridge disaster in our city sooner rather than later.
Supply chain issues and now winter weather have delayed the completion of the new Davis Avenue Bridge. (Bridge Engage Page; Public Art Engage page)
Rehabilitation on the Swinburne Bridge remains on pause until after the Charles Anderson Bridge is reopened as the Swinburne Bridge is part of the detour route. (Pittsburgh Engage page)
Preliminary engineering remains ongoing for the rehabilitation of the 28th Street Bridge. (Pittsburgh Engage page)
Preliminary engineering has started for the California Avenue Bridge rehabilitation. (Pittsburgh Engage page)
While the number of “Engage pages” about Pittsburgh bridges has grown in the last year (full list below the map), it still does not align with all the bridges closed fully or partially. In addition to the bridges mentioned above, the most recent addition to the list of bridges with issues, but no Engage page is the Panther Hollow Bridge that closed to vehicles October 2024 due to the results of its most recent inspection (see 2024 Bridge Disasters Actual and Pending for more).
In national bridge news, Congress fully funded the reconstruction of the collapsed Francis Scott Key Bridge before the end of December (Governor Moore’s statement, December 21, 2024), contrary to my prediction on Funding Bridges (December 15, 2024).

Photos: Other Bridges

Historic Pittsburgh Bridge Disasters

According to Bob Regan’s 2006 book “The Bridges of Pittsburgh,” Pittsburgh is no stranger to bridge disasters:

1845 – The original Smithfield Street Bridge burned down
1851 – The 16th Street Bridge burned down
1865 – Two spans of the 16th Street Bridge was washed away in a flood
late 1880s – The 6th Street/St. Clair Street Bridge burned down
1903 – The Wabash Bridge collapsed during construction
1918 – The 16th Street Bridge burned down (again)
1921 – The 30th Street Bridge burned down
1927 – The Mount Washington Roadway Bridge collapsed during construction

Map of bridges discussed in the Bridge Collapse series:

Additional Resources:

Both PennDOT and the Federal Highway Administration have interactive maps of bridges for the state and country respective, and their inspection statuses. Pittsburgh now has the static Comprehensive Bridge Asset Management Program Report of the 147 bridges owned by the City of Pittsburgh.

Bridges in Pittsburgh with community engagement pages for pending rehabilitation or replacement projects:

Previous Fern Hollow Bridge Posts:

Two Year Update

Eighteen Month Update

2024 Bridge Disasters Actual and Pending

Posted on December 18, 2024 by Carolyn Ristau

Bridge accidents is a common theme this year. The most significant was the collapse of Baltimore’s Francis Scott Key Bridge in March 2024 after being struck by a malfunctioning container ship. However, other accidents happened to bridges in the Pittsburgh area. Weeks after Baltimore’s bridge collapse, the Sewickley Bridge, a few miles downriver from Pittsburgh, closed for a day after being struck by runaway barges (WTAE, April 14, 2024). Then, in August, a dump truck struck an unused railroad bridge in Pittsburgh. The road underneath closed temporarily while the obsolete and now damaged bridge was removed. The adjacent, active railroad bridge remains. (WTAE, August 16, 2024)

Meanwhile, Pittsburgh continues to preemptively close bridges or restrict traffic to reduce the chances of another bridge collapse. The most recent of these is the full closure of Panther Hollow Bridge announced October 19, 2024, with immediate effect. It is called a temporary closure while the City of Pittsburgh figures out what it needs to do for the bridge. (Mayor’s Press Release, October 19, 2024) Other recent “temporary closures” of Pittsburgh bridges have turned into sporadic periods of closure and opening (Swindell Bridge) or a years-long closure while funding is found and repairs are implemented (Charles Anderson Bridge).

Another common restriction we are seeing in Pittsburgh bridges is sidewalk closures while vehicular traffic remains unaffected. Pittsburgh’s South Negley Avenue bridge is one of the bridges in town that is poised as a pending disaster. In acknowledging the structural issues of this bridge, the west sidewalk was closed in 2022. However, I noticed that by July 2023, the barriers on that sidewalk were pushed aside and it wasn’t clear if that was an official move or if pedestrians had taken matters into their own hands. Then, in June 2024, first the eastern sidewalk was closed with a temporary protected pedestrian pathway installed in the car lane (Mayor’s Press Release, June 6, 2024) and then, a week later, the western sidewalk was again closed (Mayor’s Press Release, June 17, 2024). Why this “safety” measure is helpful is beyond me as this bridge has been earmarked for replacement for years pending funding and access issues. Also, the Smithfield Street Bridge sidewalk always has rusted out holes showing the river flowing below that eventually get patched without closing the sidewalk.

Francis Scott Key Bridge Collapse

Posted on March 26, 2024 by Carolyn Ristau

One of my readers alerted me to last night’s collapse of the Francis Scott Key Bridge in Baltimore. While I’ve never walked that bridge, since the collapse of Pittsburgh’s Fern Hollow Bridge, which I have walked, the scope of my blog has expanded to highlight the fragile nature of the infrastructure we rely on daily in the United States (and across the pond). According to the reports coming in and the video of the accident, a loaded cargo liner crashed into a pier of the Francis Scott Key Bridge causing the structure to collapse. The Baltimore Sun (March 26, 2024) and Washington Post (March 26, 2024) articles are my primary sources for learning of the accident.

Unlike Pittsburgh’s disaster which was due to a deteriorated portion of the bridge finally giving way after years of deferred maintenance, no blame has yet been placed on any structural unsoundness of the Francis Scott Key Bridge.

The ship that ran into it is another story. Apparently, it recently was flagged as having questionable issues in its navigation system. The current understanding is that the ship lost power and control of steering, issued a mayday alert, and crashed into the bridge pier. In the early analysis of what happened, there are questions as to why various things were not handled differently to have prevented the collision. For example:

Why were there not more structures in the water to deflect any ships away from the bridge pier?
Why didn’t the tugboats continue with the ship until it cleared not just the harbor, but the bridge as well?
Why wasn’t the bridge built with redundancies so that even if one of the piers were knocked out, the bridge could still stand?

Much like deferred maintenance (of bridges and ships), I suspect that money is at the root of the reason why not for items one and three above. It may also be a factor in why the tugboats don’t travel farther down the river with the ships.

The City of Baltimore and State of Maryland have declared a state of emergency. Pledges are being made to rebuild the bridge quickly, including President Biden promising the money to rebuild. It may be interesting to compare the rebuilding of the Francis Scott Key Bridge against Pittsburgh’s Fern Hollow Bridge. While of significantly different scales, both bridges are considered major transportation arteries that the local region cannot afford to be without any longer than absolutely necessary. Will the Francis Scott Key Bridge rebuild include similar time saving measures of purely utilitarian design and of concurrent design/build phases?

Bridge Collapse: Two Years Later

Posted on January 15, 2024 by Carolyn Ristau

Thirteen months ago, Pittsburgh’s Fern Hollow Bridge reconstruction was declared finished eleven months after the previous bridge had collapsed. I scoffed at this announcement at the time as the side walk wasn’t yet open and the new bridge was closed again for a month during the summer to “complete all remaining bridge work.” (Mayor’s Press Release, June 8, 2023). However, David McCullough in The Great Bridge points out that there is never a clear completion date for a new bridge. He notes that when the Brooklyn Bridge was “finished:”

There was no one moment, no particular day, when he [Washington Roebling] could have said as much, nor would there be. Bridges did not end that way. There was always something more to finish up, some last detail to attend to. The final touches at Cincinnati, for example, had dragged on for nearly six months after the opening ceremonies and it looked as though the same might happen here. (505)
David McCullough, “The Great Bridge”

The Fern Hollow Bridge, therefore, was simply following the pattern established by other greater bridges. The bridge itself now seems to be fully complete and operational: all the multi-modal options to cross are open, the trail underneath is also open, and people crossing over or passing under can experience the public art installations. However, while the physical infrastructure has been repaired, the human physical and emotional fallout from the collapse continues.

Some of the people injured in the collapse are working with attorneys to seek transparency and a way to move forward following their experience. This fall, a judge ordered the release of documents relating to the bridge and its collapse (TribLive, November 16, 2023; TribLive, November 28, 2023; WPXI, November 28, 2023; WTAE, November 28, 2023; CBS News, November 29, 2023). In December, PennDOT released hundreds of pages of documents related to the collapse (CBS News, December 23, 2023).

News

Below are the news updates on the Fern Hollow Bridge and other bridge maintenance and replacement efforts in Pittsburgh and Allegheny County.

The National Transportation Safety Board’s investigation is still listed as ongoing. No updates have been added to their website since the January 26, 2023, preliminary findings.
A year and a half after the City created a Commission on Infrastructure Asset Reporting and Investment, Mayor Gainey finally submitted nominations for the board seats to City Council (WESA, July 18, 2023). Council approved 12 commissioners on July 25, 2023, one commissioner on September 19, 2023, and one commissioner on December 18, 2023. The commission had its first meeting on December 5, 2023, (City of Pittsburgh Tweet, November 28, 2023; WPXI, December 5, 2023) but it hasn’t been added yet to the city’s website listing all Boards and Commissions. Presumably it will be added soon so that the agenda and minutes of the commission will be publicly available the same as all other city commissions. There have been no press leases regarding the long-overdue formation of this commission. I’ve only found the commissioners names by searching the City’s Legislative Center for “Appointment-Requiring Vote.” The approved commissioners are:
- Lisa Frank
- Zachary Workman
- Tyler Watts
- Tom Melisko
- Patrick Cornell
- Greg Bernarding
- Eric Setzler
- Doris Carson Williams
- Darrin Kelley
- Councilwoman Erika Strassburger
- Chief Darryl Jones
- Andy Waple
- Samuel Miclot
- Michele Miller Beener
The final designs for the rehabilitation of the Charles Anderson Bridge and the Panther Hollow Overpass are nearing completion and bids are expected to be released this month. (Pittsburgh Engage project page)
Pittsburgh’s Swindell Bridge, which closed initially from July to September 2022 due to falling debris, continues to have problems and the city is providing little to no information at this time. The expectation was that repairs over the summer would enable the bridge to fully reopen to traffic. Instead the latest repairs seem to have uncovered more issues. There is no evidence of a plan yet for addressing the situation. (TribLive, July 7, 2023; WPXI, August 7, 2023; Pittsburgh Engage page)
The “complete overhaul” of the South Negley Avenue Bridge announced in 2022 (CBS, February 25, 2022) has not been mentioned since and there is no project page for it to indicate that plans are in the works for it. The obvious deterioration on this bridge and lack of movement on repairs leaves the way open for speculation on whether we will have another bridge disaster in our city sooner rather than later.
Construction began on the 30th Street Bridge rehabilitation in April 2023 and finished in August. (WPXI, August 21, 2023; Pittsburgh Engage page)
The contract for the new Davis Avenue Bridge was awarded in October 2023 and construction is expected to begin in the spring. (Bike Pittsburgh, November 15, 2023; Bridge Engage Page; Public Art Engage page)
Rehabilitation on the Swinburne Bridge remains on pause until after the Charles Anderson Bridge is reopened as the Swinburne Bridge is part of the detour route. (Pittsburgh Engage page)
Preliminary engineering is ongoing for the rehabilitation of the 28th Street Bridge. (Pittsburgh Engage page)
Temporary repairs, including protection from falling debris, were done on the California Avenue Bridge. Preliminary engineering is scheduled to start this year. Residents remain concerned about the falling debris and the condition of the bridge. This bridge is another possible candidate for the next bridge disaster in the city. (CBS, January 2, 2023; WPXI, June 29, 2023; WPXI, December 5, 2023; TribLive, September 8, 2023; Pittsburgh Engage page)

Photos: Other Bridges

Historic Pittsburgh Bridge Disasters

According to Bob Regan’s 2006 book “The Bridges of Pittsburgh,” Pittsburgh is no stranger to bridge disasters:

1845 – The original Smithfield Street Bridge burned down
1851 – The 16th Street Bridge burned down
1865 – Two spans of the 16th Street Bridge was washed away in a flood
late 1880s – The 6th Street/St. Clair Street Bridge burned down
1903 – The Wabash Bridge collapsed during construction
1918 – The 16th Street Bridge burned down (again)
1921 – The 30th Street Bridge burned down
1927 – The Mount Washington Roadway Bridge collapsed during construction

Map of bridges discussed in the Bridge Collapse series:

Additional Resources:

Bridges in Pittsburgh with community engagement pages for pending rehabilitation or replacement projects:

Previous Fern Hollow Bridge Posts:

Eighteen Month Update

Bridge Collapse: Eighteen Months Later

Posted on July 27, 2023 by Carolyn Ristau

According to the Pittsburgh Business Times, the collapse of the Fern Hollow Bridge in Pittsburgh ranked 4th in the top stories of 2022. Ranked higher were the New Normal (#1), Economic Stressors (#2), and the Shutdown of Tech Startups (#3).

As the first bridge collapse in nearly 100 years within the city limits of Pittsburgh, this remains a top story on urbantraipsing. In the six months since our last look at the bridge, there have been four important updates:

The preliminary findings of the National Transportation Safety Board’s investigation into the collapse have been released
The bridge is now fully open to vehicular, bicycle, and pedestrian traffic
The two art installations have been installed
My feet are back to being fully functional

Update 1: Unsurprisingly, the NTSB’s investigation found that a decade of ignoring the calls for maintenance in the annual bridge inspection resulted in the deterioration of the steel structure of the bridge. The findings reference the inspections of bridges of similar construction in Pennsylvania following the collapse of the Fern Hollow Bridge. It noted that while those bridges have also experienced deferred maintenance, none of them are exhibiting deterioration as bad as Fern Hollow’s. The report did express concern that the status of similar bridges outside of Pennsylvania is unknown.

Update 2: While all lanes, the sidewalk, and multi-modal path are now open, there is evidence of some more work to be done. A little beyond the western end of the bridge, there are the preliminary markings for a crosswalk. Also, a “stop here on red” sign was installed, though it currently faces the park, not the traffic. Both of these suggest that a new traffic light will be installed to create a safe pedestrian crossing.

Update 3: John Peña’s A History of Fern Hollow Creek was installed on the bridge and Carin Mincemoyer’s Trail Meander was installed under the bridge. Mincemoyer’s alternative concept of a rain arch that paid homage to the arch of the former bridge did not move forward as it was found to not be feasible within the time and budget constraints of the project. I enjoyed the historical timeline of the bodies of water on this site illustrated in Peña’s installation – it provides and opportunity to stop and think about the different bodies of water that have shaped the landscape of Pittsburgh over millennia. I haven’t yet cracked the pattern of the order in which they are displayed, if there is one.

Update 4: As I do not currently have any mobility limitations, I was able to take many more pictures from different angles.

Photos: Fern Hollow

Below are the news updates on the Fern Hollow Bridge and other bridge maintenance and replacement efforts in Pittsburgh and Allegheny County.

The artwork on the bridge was approved by the Public Art + Civic Design Commission in October 26, 2022 (Agenda, Application, Minutes). The artwork for the trail experience under the bridge was approved by the Public Art + Civic Design Commission in March 22, 2023 (Agenda, Application, Minutes).
PennDOT’s project page regarding the reconstruction of the bridge has not been updated since March 2022, except to add a sentence at the beginning to say that the bridge is now complete and operational prior to my last update in January, despite the fact that the bridge was fully closed again for a month in June 2023 to “complete all remaining bridge work.” (Mayor’s Press Release, June 8, 2023; WESA, June 8, 2023; Pittsburgh Magazine, June 9, 2023; Roads & Bridges, June 9, 2023; WPXI, June 11, 2023; WTAE, June 12, 2023)
Preliminary findings have been released in the National Transportation Safety Board’s ongoing investigation. Corrosion and deterioration of Fern Hollow Bridge’s uncoated weathering steel components is the key finding along. In addition, while the annual inspection of the bridge had identified maintenance activities that would have addressed these issues for over a decade, the maintenance was not completed.
The City created a Commission on Infrastructure Asset Reporting and Investment in March 2022, but no one has been appointed to the commission and it hasn’t been added yet to the city’s website listing all Boards and Commissions. Earlier this year, Mayor Gainey (WESA, June 26, 2023) and Councilwoman Strassburger (Pittsburgh Union Progress, April 3, 2023) both discussed the value of the commission – when it is operational. Neither discussed why the Mayor hasn’t appointed anyone to the board yet (Post-Gazette, June 8, 2023).
The temporary closure of the Charles Anderson Bridge turned into a long-term closure as expedited funding was negotiated to move the full rehabilitation forward sooner. The project may take until 2025 or 2027 and will include a new 2-way bike lane. The Panther Hollow Overpass will also be repaired while the Charles Anderson Bridge is closed because the overpass “is approaching the end of its functional life” and the road is already closed. (Mayor’s Press Release, March 16, 2023; KDKA, March 17, 2023; KDKA, March 23, 2023; WTAE, April 18, 2023; Patch, April 18, 2023; Post-Gazette, April 18, 2023; WPXI, April 19, 2023; WESA, June 1, 2023; Pittsburgh Engage project page)
Pittsburgh’s Swindell Bridge, which closed from July to September 2022 due to falling debris, closed for about a week in April to set-up platforms for future construction and then closed again in July to install new beams. One of the articles says that this will finish the work on the Swindell Bridge, while another says that a full rehabilitation project is yet to come. Pittsburgh’s Engage site only shows the public meeting from April. (Triblive, April 22, 2023; Mayor’s Press Release, April 21, 2023; WTAE, April 27, 2023; Mayor’s Press Release, April 27, 2023; KDKA, July 9, 2023; Pittsburgh Engage page; Mayor’s Press Release, July 7, 2023; Post-Gazette, July 10, 2023)
In searching for new news on the South Negley Avenue Bridge, I didn’t find anything new, but I found an article from 2015 that said the renovation of the bridge was scheduled to start 2 years from then – that has come and gone with no new start date in sight. In addition to not finding anything new about what is happening to this poor condition bridge, it’s not clear if the closure of the west sidewalk of the South Negley Avenue Bridge from 2022 officially ended or if pedestrians took matters into their own hands and moved the barriers aside themselves. (The Philadelphia Tribune, February 2, 2015)
Construction began on the 30th Street Bridge rehabilitation in April 2023. (Triblive, April 22, 2023; Mayor’s Press Release, April 21, 2023; Pittsburgh Engage page)
There’s evidence of that the construction of the new Davis Avenue Bridge is moving forward from the approval of the Public Art + Civic Design (PACD) Commission in March to the listing in the Construction Journal for bids. (Triblive, March 24, 2023; Construction Journal, June 9, 2023; Bridge Engage Page; Public Art Engage page; PACD Agenda, Application, Minutes)
Maintenance work on Swinburne Bridge was scheduled for May 2023. Full rehabilitation will happen later, after the Charles Anderson Bridge is reopened as the Swinburne Bridge is part of the detour route. (Mayor’s Press Release, May 19, 2023)
The Lincoln Avenue and Fremont Street bridges were closed indefinitely for repair January 2023 by PennDOT to the surprise of Millvale, PA – a small town across the 40th Street Bridge from Pittsburgh – the borough is seeking funding for the repairs (Borough’s Announcement, January 23, 2023)

Photos: Other Bridges

Historic Pittsburgh Bridge Disasters

According to Bob Regan’s 2006 book “The Bridges of Pittsburgh,” Pittsburgh is no stranger to bridge disasters:

1845 – The original Smithfield Street Bridge burned down
1851 – The 16th Street Bridge burned down
1865 – Two spans of the 16th Street Bridge was washed away in a flood
late 1880s – The 6th Street/St. Clair Street Bridge burned down
1903 – The Wabash Bridge collapsed during construction
1918 – The 16th Street Bridge burned down (again)
1921 – The 30th Street Bridge burned down
1927 – The Mount Washington Roadway Bridge collapsed during construction

Map of bridges discussed in the Bridge Collapse series:

Additional Resources:

Bridges in Pittsburgh with community engagement pages for pending rehabilitation or replacement projects:

Previous Fern Hollow Bridge Posts:

Bridge Collapse: One Year+ Later

Posted on February 12, 2023 by Carolyn Ristau

Irony? Serendipity? A sign I’ve walked too many bridges? It’s been one year since Pittsburgh’s Fern Hollow Bridge collapsed into Frick Park and another important arterial bridge is now closed and I am once again unable to fully explore due to another foot injury.

Shortly after the Fern Hollow Bridge collapsed, photos of temporary wires holding up the Charles Anderson Bridge supplementing the original metal structure that had rusted all the way through in places peppered social media and made the news with the question of would this be the next bridge to collapse? On February 1, 2023, the Charles Anderson Bridge was “immediately closed” to vehicular traffic (press release). Those with fully functioning limbs are still able to walk or bike across or under the bridge – it passes over another one of Pittsburgh’s major parks (Schenley Park).

The bridge was closed to facilitate interim repairs that may take four months. The bridge has been slated for a full rehabilitation for several years (see the City’s project page for more). The original projection was that this project would be funded this year, but according to a press release from the Mayor’s office on February 2, the expected funds have been delayed until 2027 and the City is looking for ways to expedite the funding.

Also, along the lines of serendipity, I happened to be browsing my copy of Bob Regan’s “The Bridges of Pittsburgh” (2006) this week for unrelated reasons and came across the section “Bridge Disasters.” The section opens with the statement: “Although Pittsburgh area bridges are quite safe and there has been an absence of bridge problems in modern times, this was not always the case.” (page 50) After identifying several of the bridge disasters from pre-modern times (summarized below), he ends this section with “Since that time [1927] there has not been a bridge collapse in the Commonwealth of Pennsylvania and there has never been a collapse of an operating bridge. However, this record was somewhat blemished in late 2005 with the collapse of a portion (one side girder) of a bridge over I-70 near Washington, PA.” (page 51) Of course, any updated version of the book will now have to strike this claim due to the 2022 collapse of the operating Fern Hollow Bridge.

Driving over the new Fern Hollow Bridge this week, it looked in pretty much the same condition as in December with one lane of traffic in each direction and one shared path open. There were several bikers and pedestrians using it while we crossed during the latter part of rush hour.

Bridge disasters highlighted in “The Bridges of Pittsburgh:”

1845 – The original Smithfield Street Bridge burned down
1851 – The 16th Street Bridge burned down
1865 – Two spans of the 16th Street Bridge was washed away in a flood
late 1880s – The 6th Street/St. Clair Street Bridge burned down
1903 – The Wabash Bridge collapsed during construction
1918 – The 16th Street Bridge burned down (again)
1921 – The 30th Street Bridge burned down
1927 – The Mount Washington Roadway Bridge collapsed during construction

Charles Anderson Bridge, February 10, 2023

Below are the news updates on the Fern Hollow Bridge and other bridge maintenance and replacement efforts in Pittsburgh and Allegheny County.

The proposed artwork for the new bridge is among the elements not yet completed. I didn’t find any new information on this since the NextPittsburgh article of September 26, 2022, that I cited in the December update.
PennDOT’s project page regarding the reconstruction of the bridge has not been updated since March 2022, except to add a sentence at the beginning to say that the bridge is now complete and operational, despite the fact that it is not fully open yet due to ongoing work/finishing touches.
The National Transportation Safety Board’s ongoing investigation into the Fern Hollow Bridge collapse was updated on January 26, 2023, with details of what has been investigated to date including photos of some of the parts of the collapsed bridge. It also now contains a link to a preliminary docket of materials that have been gathered in the investigation. They are still working out the cause of the collapse and recommendations to prevent such incidents in future.
The City created a Commission on Infrastructure Asset Reporting and Investment in March 2022, but this commission has not been added yet to the city’s website listing all Boards and Commissions and I have not seen any announcements of any appointments to the new Commission.
Pittsburgh’s Swindell Bridge, which closed from July to September 2022 due to falling debris, is currently under lane restrictions and is expected to close for a month later this year for additional repairs. (Pittsburgh Union Progress, February 12, 2023)
The closure of the west sidewalk of the South Negley Avenue Bridge doesn’t phase some people as they by-pass the barriers and continue on their way, in fact one of the barriers had been completely moved aside the last time I drove across the bridge, presumably by someone who found it in their way.
The Lincoln Avenue and Fremont Street bridges were closed for repair January 2023 by PennDOT in Millvale, PA – a small town across the 40th Street Bridge from Pittsburgh (WPXI, January 27, 2023)

Map of bridges discussed in the Bridge Collapse series:

Additional Resources:

Bridges in Pittsburgh with community engagement pages for pending rehabilitation or replacement projects:

Previous Fern Hollow Bridge Posts:

Bridge Collapse: Eleven Months Later

Posted on December 30, 2022 by Carolyn Ristau

Six months after Pittsburgh’s Fern Hollow Bridge collapse, PennDOT and the Mayor’s office announced that the new bridge would probably open before the end of the year. The ribbon cutting for the new bridge was held on December 21 (Governor Tom Wolf News, WPXI, Pittsburgh Business Times) and the bridge opened to partial traffic the following day. There is one lane of traffic open in each direction and one “shared path” open on the south side of the bridge. Work on the bridge will continue through the spring.

The initial designs showed a bridge designed for highway vehicle traffic with pedestrian and bicycle access tacked on in a thoughtless way. Despite public outcry and professional push-back, the initial designs went primarily unchanged. As the bridge is not fully open, there is a chance that in execution it won’t be as bad as the initial design suggested, but it’s not off to a promising start.

The shared path on the south side – the one that’s now open – connects to sidewalk on the east side of the bridge and to the trails in Frick Park on the west side. There is no existing sidewalk to continue walking along Forbes Avenue to Squirrel Hill. While this path is unusually wide for a bridge, it appeared to be just a sidewalk when I visited it this week. I adopted the term “shared path” based on the videos of the ribbon cutting, which claimed that’s what it is. Perhaps there will be signage added eventually that bikes are also permitted, but I didn’t notice a way for bikes to get up onto this path from the road. While I’m clearly judging this bridge already and finding it wanting, I will continue to monitor its progress and will be open to finding it better than I do now once all the amenities are open and I’m no longer confronted with pedestrian dead end signs.

Below is a slideshow of photos from this month’s traipsing of the bridge followed by the news updates on the Fern Hollow Bridge and other bridge maintenance and replacement efforts in Pittsburgh and Allegheny County.

The City announced traffic pattern changes now that the bridge is reopening, breaking up one of the smooth travel paths for vehicles trying to cross the eastern neighborhoods on a north-south axis. (City Press Release, December 22, 2022)
The proposed artwork for the new bridge is among the elements not yet completed. (NextPittsburgh, September 26, 2022)
For whatever reason, PennDOT’s project page regarding the reconstruction of the bridge has not been updated since March 2022, making it a completely useless resource.
The National Transportation Safety Board’s ongoing investigation into the Fern Hollow Bridge collapse was last updated in May 2022, but this was initially described as a long-term effort.
The City created a Commission on Infrastructure Asset Reporting and Investment in March 2022, but this commission has not been added yet to the city’s website listing all Boards and Commissions and I have not seen any announcements of any appointments to the new Commission.
WSP USA released it’s Comprehensive Bridge Asset Management Program Report of the 147 bridges owned by the City of Pittsburgh – lots of work needs to be done on Pittsburgh’s bridges. (City Press Release, December 22, 2022; Tribune Review, December 21, 2022; WPXI, December 22, 2022)
The City of Pittsburgh’s 2023 Capital Budget includes limited funding for bridge repair and maintenance. (Public Source, December 5 & 22, 2022)
The bridge Port Authority closed to repair shortly after the Fern Hollow Bridge collapse, and then had to re-repair in July, seems to be okay now.
On July 1, Pittsburgh’s Swindell Bridge was closed due to falling debris. It reopened on September 1. (City Press Release, September 1, 2022; CBS, September 1, 2022; WPXI, September 1, 2022)
The Finland Street Pedestrian Bridge underwent an emergency demolition on October after being struck by a crane attempted to pass underneath. (City Press Release, October 7, 2022; City Press Release, October 8, 2022)
The City of Pittsburgh announced in November that it was going to close the east sidewalk on the South Negley Avenue Bridge (one of the bridges that the public is concerned about its highly deteriorate appearance) out of an “abundance of caution” to accommodate repairs, however, it was the west sidewalk that ended up closing. (City Press Release, November 23, 2022)
A public hearing was held on the Davis Avenue Bridge Reconstruction project in September. (City Press Release, September 28, 2022)

Additional Resources:

Both PennDOT and the Federal Highway Administration have interactive maps of bridges for the state and country respective, and their inspection statuses.

Previous Fern Hollow Bridge Posts:

Bridge Collapse: Six Months Later

Posted on July 30, 2022 by Carolyn Ristau

There was a lot of news about the bridge this month. PennDOT and the Mayor’s office held a press conference on Monday to announce that the bridge may be completed before the end of the year. This unusually fast pace is because construction is underway while the design is still being worked out. Inspired by the event, I went to Frick Park after work and explored the view of the bridge from the northern approach along the Tranquil Trail.

While the news is good for the Fern Hollow Bridge reconstruction, there were hiccups this month on the Swindell and Port Authority bridges.

Below is a slideshow of photos from my hike this month followed by the news updates on the Fern Hollow Bridge and other bridge maintenance and replacement efforts in Pittsburgh and Allegheny County.

The beams for the new Fern Hollow Bridge are being delivered to the site two per day, generating excitement on news and social media. (WTAE video of the first beam delivery, July 26, 2022; CBS article and video, July 25, 2022)
Two artists were selected to provide artwork for the new Fern Hollow Bridge (City Press Release, July 25, 2022)
Despite the press conference, artist announcement, and beam delivery schedule, there are no new updates on PennDOT’s project page regarding the reconstruction of the bridge.
Similarly, no new updates have been posted regarding the National Transportation Safety Board’s ongoing investigation into the Fern Hollow Bridge collapse.
The City created a Commission on Infrastructure Asset Reporting and Investment in March 2022, but this commission has not been added yet to the city’s website listing all Boards and Commissions and I have not seen any announcements of any appointments to the new Commission. However, there was a press release this month asking for applicants interested in serving in any of the city’s boards and commissions.
WSP USA was selected to manage the City’s new Bridge Asset Management Program. (Tribune Review, July 19, 2022)
On Tuesday, Port Authority found a crack in one of the rails on the bridge that was just repaired. The inbound T service was discontinued for two days to enable the replacement of this portion of track.
On July 1, Pittsburgh’s Swindell Bridge was closed due to falling debris. The falling debris was noticed during the first phase of repairs, which was repaving the road. (City Press Release, July 1, 2022) The subsequent inspection found that the debris came from the repairs – material accumulated in one of the drainage troughs, putting unusual pressure on the trough and causing it to “tear open and spill” the debris onto route 279 – hours after I had driven under it. (City Press Release, July 5, 2022)

Additional Resources:

Both PennDOT and the Federal Highway Administration have interactive maps of bridges for the state and country respective, and their inspection statuses.

Previous Fern Hollow Bridge Posts:

Bridge Collapse: Five Months Later

Posted on June 25, 2022 by Carolyn Ristau

My foot is finally healed enough for me to begin to explore the site of the bridge collapse over Fern Hollow in Frick Park. I started at the Frick Environmental Center and explored the western slope into the hollow looking for gaps in the trees to see the progress on the bridge construction. The Clayton, Biddle, Bradema, and Tranquil trails all provided glimpses of the bridge site. According to the Hiking Project’s website, the elevation change between the highest and lowest points I encountered was 250′ and the steepest grades were between 13 and 16%.

It was pleasant hiking through the leafy forest, but the foliage hid most of the bridge site. From what I could see through the gaps in the leaves, construction seems well on its way with the four primary support columns erected. In future updates (barring further injury), I will explore the views from the park along the eastern slope and the northern trails.

Below is a slideshow of photos from this exploration followed by the news updates on the Fern Hollow Bridge and other bridge maintenance and replacement efforts in Pittsburgh and Allegheny County.

There are no new updates on PennDOT’s project page regarding the reconstruction of the bridge since my post last month.
Similarly, no new updates have been posted regarding the National Transportation Safety Board’s ongoing investigation into the Fern Hollow Bridge collapse.
The City created a Commission on Infrastructure Asset Reporting and Investment in March 2022, but this commission has not been added yet to the city’s website listing all Boards and Commissions and I have not seen any announcements of any appointments to the new Commission.
The RFP is now closed for the Bridge Asset Management Program that Mayor Gainey announced in early May. (Bidnet.com)
Port Authority’s bridge has been repaired and is back in service. The stop upgrades to the stations in Beechview and Dormont have reached a point where they have reopened to use, though repairs (including morning jackhammering) continue.
Earlier this month, Public Source published an article revisiting the first four months after the bridge collapse. From this article, I learned that the City has launched a separate investigation into the collapse, that the overworked and understaffed Department of Mobility and Infrastructure will need more staff and resources to implement better bridge management in the city, and that a table of the status of Allegheny County’s poor condition bridges was released in February shortly after the Fern Hollow Bridge collapse.
The Campbell’s Run Road bridge replacements identified in the County’s list of poor condition bridges are indeed happening this year. I have gotten caught up in traffic congestion caused by the detour for the work several times. (WTAE, February 3, 2022)
Pittsburgh’s Swindell Bridge is one that has been on the radar since the collapse of the Fern Hollow Bridge. The City announced this week that a first phase of repairs will be conducted over the next couple weeks. This initial phase consists of repaving the road surface. (City Press Release, June 24, 2022)

Additional Resources:

Both PennDOT and the Federal Highway Administration have interactive maps of bridges for the state and country respective, and their inspection statuses.

Previous Fern Hollow Bridge Posts:

“Poor Condition” Forbes Ave Bridge Collapsed Yesterday

Posted on January 29, 2022 by Carolyn Ristau

Yesterday, after the Fern Hollow Bridge collapsed in Pittsburgh a photo circulated on social media of one of the steel support beams of the bridge completely rusted through. This photo was taken in 2018 and reported to the City’s 311 system. While the photo also showed cables that had been added to the bridge to presumably take over the job of the steel beam that then ended in mid-air, the person submitting the photo was concerned that this might not be sufficient. I have seen similar rusted conditions on other bridges that I have walked over or under in Pittsburgh. I cannot remember if it was the Negley Ave bridge over the busway, the Charles Anderson Bridge over Junction Hollow in Frick Park, both, neither, or a handful of other bridges. (Note: both of these bridges are rated in poor condition.)

A neighbor quoted in a Tribune Review article after the Fern Hollow Bridge collapse wondered why the bridge hadn’t been repaired or replaced before the accident since it was known to be in poor condition. According to BridgeReports.com, which pulled inspection data on the bridge from 1991-2017, the bridge has been rated as in poor condition since 2011. Based on my experiences and exposure to bridges, I am not surprised that a bridge was left in poor condition for over a decade. This morning, I pulled data from the National Bridge Inventory on the 449 inventoried bridges within a 6-mile radius of downtown Pittsburgh. I was surprised to find that only 10% of these bridges were rated in poor condition.

Below is a chart of the 48 bridges rated in poor condition within a 6-mile radius of downtown, which includes some that are outside the boundaries of the City of Pittsburgh. In those cases, the city owner would be the municipality they are within. The first four columns are the data I pulled from the National Bridge Inventory, the final column is from BridgeReports.com. Both sources were updated through 2018, which means that there have been some changes since then, including the possibility that more bridges have fallen into a poor state. I marked in italics the bridges that I am heard went through renovations in recent years and in bold the one that collapsed. The bridges with hyperlinks are the ones that I have walked and blogged.

Owner	Bridge Description	Year Built	Year Renovated	Rated Poor Since
State	Island Avenue Bridge	1900	–	–
State	Wetzel Rd over Pine Creek	1936	–	–
State	Blvd of Allies over cliff	1950	–	2018
State	Blvd of Allies over Forbes	1952	1984	2017
State	Ramp U over Old Brady St	1954	1985	2013
State	Ramp R over Brady	1956	1985	2017
State	Ramp H over Forbes, Diamond, 6th Ave	1962	2012	1997
State	Peoples Rd over Girtys Run	1963	–	–
State	Washington Ave over P&O RR	1965	–	–
State	Ft Duquesne to 10th St	1968	1988	–
State	Blvd of Allies over another cliff	1981	2001	2018
Railroad	West Ohio St over NS RR	1903	1958	1991
Railroad	N Ave & Brighton Rd over NS RR	1905	1929	2009
County	9th Street – Rachel Carson Bridge	1926	1994	2013
County	Jacks Run Rd over Jacks Run	1980	2019	–
County	Wible Run Rd over Wible Run	1987	–	–
City	Second Ave over Nine Mile Run	1886	–	at least 1991
City	Shaler St over Saw Mill Run	1900	–	at least 1991
City	Lowrie St over Rialto St	1900	1972	2008
City	Elizabeth St over Gloster St	1900	1979	2014
City	Ridge Ave over NS RR	1903	1957	at least 1991
City	Timberland Ave over Saw Mill Run	1909	–	at least 1992
City	Fremont St over Girtys Run	1911	–	–
City	Lincoln Ave over Girtys Run	1911	1950	–
City	Larimer Ave over Washington Blvd	1912	–	at least 1991
City	Grant Ave over Girtys Run	1914	1986	–
City	Klopper St over Girtys Run	1915	–	–
City	Lincoln Ave over Girtys Run	1915	1986	–
City	Frazier St over Saline St	1915	1989	2007
City	S Negley Ave over E Busway	1924	1973	at least 1991
City	W Carson St over Chartiers Creek	1925	1978	2009
City	Ansonia Pl over Saw Mill Run	1925	1998	1995
City	Maple Ave over N Charles St	1929	1953	at least 1991
City	Swindell Br over East St	1930	1990	2009
City	Calera St over Streets Run	1931	–	at least 1991
City	28th St over Busway & RR	1931	1974	at least 1990
City	E Main St over Chartiers Creek	1934	2002	–
City	Charles Anderson Bridge	1938	1987	2012
City	Mission St over S 21st St	1939	1982	2010
City	River Ave over Bike Trail	1939	1986	2008
City	Ganges Way over Streets Run	1951	–	2016
City	E Liberty Blvd SB over walkway	1968	–	2009
City	Forbes Ave over Fern Hollow	1970	–	2011
City	Herron Ave over Busway & RR	1980	–	2018
City	McArdle over Sycamore St	1983	–	2017
City	Milroy St over I-279	1986	–	2011
Other Local Agency	Centre Ave over East Busway	1979	–	2008
Other Local Agency	Penn Ave over East Busway	1981	–	2018

urbantraipsing

A site of urban exploration. Text and photos by Carolyn Ristau.

Tag Archives: bridge collapse

Bridge Collapse (PGH): Three Years Later

News

Photos: Other Bridges

2024 Bridge Disasters Actual and Pending

Francis Scott Key Bridge Collapse

Bridge Collapse: Two Years Later

News

Photos: Other Bridges

Bridge Collapse: Eighteen Months Later

Photos: Fern Hollow

Photos: Other Bridges

Bridge Collapse: One Year+ Later

Bridge Collapse: Eleven Months Later

Bridge Collapse: Six Months Later

Bridge Collapse: Five Months Later

“Poor Condition” Forbes Ave Bridge Collapsed Yesterday