Tag Archives: bridges

“Poor Condition” Forbes Ave Bridge Collapsed Yesterday

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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.

OwnerBridge DescriptionYear BuiltYear RenovatedRated Poor Since
StateIsland Avenue Bridge1900––
StateWetzel Rd over Pine Creek1936––
StateBlvd of Allies over cliff1950–2018
StateBlvd of Allies over Forbes195219842017
StateRamp U over Old Brady St195419852013
StateRamp R over Brady195619852017
StateRamp H over Forbes, Diamond, 6th Ave196220121997
StatePeoples Rd over Girtys Run1963––
StateWashington Ave over P&O RR1965––
StateFt Duquesne to 10th St19681988–
StateBlvd of Allies over another cliff198120012018
RailroadWest Ohio St over NS RR190319581991
RailroadN Ave & Brighton Rd over NS RR190519292009
County9th Street – Rachel Carson Bridge192619942013
CountyJacks Run Rd over Jacks Run19802019–
CountyWible Run Rd over Wible Run1987––
CitySecond Ave over Nine Mile Run1886–at least 1991
CityShaler St over Saw Mill Run1900–at least 1991
CityLowrie St over Rialto St190019722008
CityElizabeth St over Gloster St190019792014
CityRidge Ave over NS RR19031957at least 1991
CityTimberland Ave over Saw Mill Run1909–at least 1992
CityFremont St over Girtys Run1911––
CityLincoln Ave over Girtys Run19111950–
CityLarimer Ave over Washington Blvd1912–at least 1991
CityGrant Ave over Girtys Run19141986–
CityKlopper St over Girtys Run1915––
CityLincoln Ave over Girtys Run19151986–
CityFrazier St over Saline St191519892007
CityS Negley Ave over E Busway19241973at least 1991
CityW Carson St over Chartiers Creek192519782009
CityAnsonia Pl over Saw Mill Run192519981995
CityMaple Ave over N Charles St19291953at least 1991
CitySwindell Br over East St193019902009
CityCalera St over Streets Run1931–at least 1991
City28th St over Busway & RR19311974at least 1990
CityE Main St over Chartiers Creek19342002–
CityCharles Anderson Bridge193819872012
CityMission St over S 21st St193919822010
CityRiver Ave over Bike Trail193919862008
CityGanges Way over Streets Run1951–2016
CityE Liberty Blvd SB over walkway1968–2009
CityForbes Ave over Fern Hollow1970–2011
CityHerron Ave over Busway & RR1980–2018
CityMcArdle over Sycamore St1983–2017
CityMilroy St over I-2791986–2011
Other Local AgencyCentre Ave over East Busway1979–2008
Other Local AgencyPenn Ave over East Busway1981–2018

Breaking News: Fern Hollow Bridge Collapse

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A bridge collapsed in Pittsburgh this morning. While not an iconic bridge, the Forbes Avenue Bridge over Fern Hollow was significant as the sole road link over Frick Park. With this link missing, motorists and those using public transit will have to travel several miles out of their way through some very congested roads. Pedestrians and bicyclists have some shorter options using the park’s trails.

The bridge was built in the early 1970s and as far as I know has not had any significant maintenance work done since then. It is owned by the City of Pittsburgh. Based on the National Bridge Inventory by the Federal Highway Administration, the bridge was in “Poor” condition, had an inspection frequency of 18-24 (units were not included, hopefully this is months), the structural evaluation was “Minimally Tolerable,” the substructure was rated “Satisfactory” while the superstructure was rated “Poor,” average daily traffic was 10,000-15,000, and the detour route would add 2-5 miles. In addition, this site estimates the replacement cost at $6.5 million. I could not find the date of the last inspection on the NBI site. Based on a summary of inspections on BridgeReports.com, which sites the NBI as its source, the bridge was inspected every two years between 1991 and 2017, so presumably there were additional inspections in 2019 and 2021.

There was a bus and some other vehicles on the bridge when it collapsed. The two passengers on the bus were taken to a hospital with “minor injuries” as was a third person. Seven other people are reported to have “minor injuries” that did not require a hospital visit. The City’s first official press release on this disaster says that rescue efforts concluded at 8:30am, but that underneath the bridge was still being checked for potential victims – some of the park’s well-used trails pass underneath. WTAE has videos from the scene; the Tribune Review has quotes from nearby residents on what they heard and saw this morning. This story has also made national news with coverage by on the US News and World Report website.

The coincidences: President Biden is scheduled to speak in Pittsburgh today about infrastructure, including bridge maintenance, the overnight snow may have limited vehicular and foot traffic over and under the bridge, and I just happened to be somewhere where the news was on this morning in time to see the first news report on WTAE (I never watch or read the daily news).

Mayor Gainey is quoted as saying “we were fortunate.” The people using the bridge were unfortunate that the bridge collapsed when it did, but given that it did collapse, they were fortunate in that it appears there are no serious injuries and no deaths. It was also fortunate that the collapse happened before rush hour and on a bridge that was over land. If this was one of our river bridges or if it happened during rush hour, serious injury and death seem impossible to avoid.

Deferred maintenance of bridges is a real and serious thing. Bridges are a crucial part of our daily lives (especially in places like Pittsburgh). Every time I walk over the Negley Ave bridge over the busway, I warily eye the rusted structure. The old Highland Ave bridge over the busway used to spark the same reaction, but it was fortunately replaced several years ago. The Smithfield Street bridge has holes through the sidewalk. How far do we push our “poor” condition bridges before investing in maintenance and repair?

Then & Now: 16th Street Bridge

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urbantraipsing turns 10 in May. To mark a decade of urban-traipsing and bridge-walking, I will be revisiting twelve of the Pittsburgh bridges I walked early on to see the changes 10 years brought to them and their surroundings.

I started walking and photographing bridges to get different angles and views of the city. In 2012, the 16th Street Bridge provided views of two major, controversial development sites: the Produce Terminal and the former St. Nicholas Croatian Catholic Church.

During the summer of 2012, the Produce Terminal seemed on the cusp of being redeveloped, and partly demolished. However, significant opposition to the demolition plans killed that proposal. For years there was no visible progress. Eventually, after extensive negotiations, a new development proposal was approved and implemented (see the first photo pair below). Simultaneously, several new developments popped up nearby, replacing much of the sea of parking I complained about in my original post on the bridge (see the second and third photo pairs below).

The former St Nicholas Croatian Catholic Church was visible from the 16th Street Bridge in 2012. Six months later, it was demolished to make way for the widening of Route 28 despite parishioners efforts to save their church (see a 2013 Tribune Review article for more). I followed the story of their fight for their building closely at the time, which is what I believe prompted me to take a photo of the church from the bridge (see the fourth photo pair below).

View of inland side of Produce Terminal (Smallman St)
June 2012
View of inland side of Produce Terminal (Smallman St)
January 2022
View of the riverside of Produce Terminal – June 2012
View of riverside of Produce Terminal – January 2022
Southwest view from 16th Street Bridge – June 2012
Southwest view from 16th Street Bridge – January 2022
View of the former St Nicholas site – June 2012
View of the former St Nicholas site – January 2022

A Structurally Unsound Bridge

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This year’s Architectural Dessert Masterpiece was inspired by a trip to Vermont where I explored 14 covered bridges within an hour’s drive of Rutland. I was surprised by the amount of variety in these bridges. Most were only wide enough for one car lane, but one was definitely made for two-way traffic and a couple had sidewalks incorporated. The colors and shapes varied from bridge to bridge. Some appeared to be based on a truss-type structure while at least one looked like it had an arch infrastructure. Ages also ranged from the 1830s (Taftsville Bridge) to 1970s (Quechee Bridge). You can view all 14 bridges in the slideshow below.

Sadly, shortly after construction, my covered bridge experienced a collapse. While the incident is still under investigation, an anonymous authority stated that the collapse is believed to have been trigged by a motorist exceeding the posted 5 mph speed limit.

I’m surprised that this is my first total collapse over the eight Architectural Dessert Masterpieces that I’ve created. My first, the Parthenon, experienced a partial collapse that actually made it look even more like the original. The next closest to disaster was the Marina Tower that merged into the Leaning Tower of Pisa.

The collapse highlighted several tips for future constructions. First, I confirmed that pretzels really do make excellent piers as I originally demonstrated in my Pittsburgh suspension bridge. Second, I learned that wheatless gingerbread still has the same (or similar) strength as traditional gingerbread as the roadbed remained secure throughout the disaster. Third, I found that wheatless gingerbread is more pliable than traditional gingerbread, which resulted in more warping when transferring the pieces to the baking sheet and during baking. However, the other side of the pliability is that it is easier to trim after baking than traditional gingerbread. If I use this recipe again, I will plan to make adjustments to the dimensions of the pieces post baking. I believe that will resolve the structural issues by creating straight edges that can support each other.

Vermont Covered Bridge Slideshow
  • Worrall Covered Bridge
  • Brown Covered Bridge
  • Cooley Covered Bridge
  • Bartonsville Covered Bridge
  • Depot Covered Bridge
  • Gorham Covered Bridge
  • Hammond Covered Bridge
  • Kingsley Covered Bridge
  • Lincoln Covered Bridge
  • Middle Bridge
  • Quechee Covered Bridge
  • Sanderson Covered Bridge
  • Taftsville Covered Bridge
  • Kissing Bridge

Keeping an Eye on the CAP: Ribbon-Cutting

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The ribbon-cutting for the CAP, now called the Frankie Pace Park, happened on schedule on November 22, 2021. The Tribune-Review, Pittsburgh Post=Gazette, WTAE, KDKA/CBS, and SAI Consulting Engineers reported on the ceremony. The Tribune-Review and WTAE also have articles on the resolution earlier this month by City Council to name the park after Frankie Pace (1905-1989), a community activist and business owner in the Lower Hill.

The CAP is a project in Pittsburgh “fixing the mistakes” of Urban Renewal. The Crosstown Blvd was built in the 1960s creating a freeway in a canyon dividing the Lower Hill neighborhood from downtown. The Lower Hill neighborhood, formerly predominantly poor and black, had already been demolished by this point to make way for the Civic Arena and other cultural amenities that were never built.

The CAP is a park on a bridge built over the Crosstown Blvd and is intended to reconnect downtown and the Lower Hill, while the Lower Hill is being rebuilt by the Penguins hockey team. Construction began in June 2019 and was completed in November 2021.

This post is an update on the on-going photographic series to watch the development and usage patterns of the CAP. Periodically, once or twice a year, I return to the site to take new photographs. I plan to take the next series of photos next year in the warmer weather to see who uses the park and how. At the end of the post, there are links to the previous posts in this series.

Locating the CAP

Previous Posts in the Series

Keeping an Eye on the CAP: Nov. 2021

Keeping an Eye on the CAP: May 2021

Keeping an Eye on the CAP: Dec. 2020

Keeping an Eye on the CAP: Jun. 2020

Keeping an Eye on the CAP: Dec. 2019

Keeping an Eye on Uptown: Introduction

Keeping an Eye on the CAP: Nov. 2021

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The CAP is a project in Pittsburgh “fixing the mistakes” of Urban Renewal. The Crosstown Blvd was built in the 1960s creating a freeway in a canyon dividing the Lower Hill neighborhood from downtown. The Lower Hill neighborhood, formerly predominantly poor and black, had already been demolished by this point to make way for the Civic Arena and other cultural amenities that were never built.

The CAP is a park on a bridge being built over the Crosstown Blvd and is intended to reconnect downtown and the Lower Hill, while the Lower Hill is being rebuilt by the Penguins hockey team. Construction began in June 2019 and was expected to be completed in November 2021. As the photos below show, it appears to be predominantly completed mid-November 2021, but the construction fence was still up. There are still a couple weeks left in the month to meet the project schedule. There do not appear to be any news articles about this project since the May post of Keeping an Eye on the CAP. The next bit of news about the site will probably be either announcing the ribbon cutting or a project delay.

This post is part of an on-going photographic series to watch the development and usage patterns of the CAP. Periodically, approximately once every six months, I return to the site to take new photographs. At the end of the post, there are links to all the previous posts in the series.

Previous Posts in the Series:

Keeping an Eye on the CAP: May 2021

Keeping an Eye on the CAP: Dec. 2020

Keeping an Eye on the CAP: Jun. 2020

Keeping an Eye on the CAP: Dec. 2019

Keeping an Eye on Uptown: Introduction

Oakland Bridges: Blvd of the Allies

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The Blvd of the Allies was one of Pittsburgh’s grand public works projects from the 1920s. It rises from downtown, passing along the backside of Uptown and cutting through South Oakland before wrapping up in Schenley Park.

Four bridges enable the Blvd to make its mark on Oakland. Under normal conditions, only one of these bridges is pedestrian usable.

The road makes a flying leap into Oakland on the Boulevard of the Allies Bridge. On the South Oakland side, the Blvd enters a commercial corridor that begrudgingly gives pedestrians a place on a narrow sidewalk that abruptly begins (or ends) at the edge of the bridge. On the other side of the bridge, the Blvd is a mess of highway interchanges, so pedestrians are not welcome to utilize this bridge to go anywhere.

At the other end of the commercial corridor, pedestrians are invited to cross the Charles Anderson Bridge over Junction Hollow and into Schenley Park. (This bridge is also featured in Oakland Bridges – The Hollows.) However, once in the park, pedestrians are pushed away from the Blvd as it changes names and before it cruises through the Park.

The next two bridges are related as one is over the pedestrian route and one over the vehicular route to the recreational facilities of Schenley Park. These facilities include a pool, ice skating rink, disc golf course, tennis courts, and a track. The bridge over the pedestrian route is a small affair to cross over the pedestrian tunnel. The other is a slightly longer overpass over the two-lane segment connecting Panther Hollow Road and Overlook Drive. Neither the tunnel-bridge nor the overpass are open to pedestrians – except during the annual Pittsburgh Vintage Grand Prix, which I once took advantage of for some photographs.

Oakland Bridges: The Hollows

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Oakland is a cluster of Pittsburgh neighborhoods east of downtown. It has the highest concentration of institutions and cultural amenities in the city. It is home to Carlow College, the University of Pittsburgh (Pitt), Carnegie Mellon University (CMU), multiple UPMC hospitals, the Phipps Conservatory (Phipps), Schenley Park (the second largest city park), and the Carnegie Institute complex (housing the Carnegie Museums of Art and Natural History, the main Carnegie Library, and the Carnegie Music Hall). Most of these as well as much of the commercial and residential parts of Oakland were built on a shelf. The hospitals, part of Pitt, and some houses climb the slope toward the Hill District. Some houses also spill over the edge of the shelf, down into the hollows.

Several bridges span the Junction and Panther hollows in Oakland. The Forbes Avenue bridge connects CMU to the Carnegie Institute complex and one of the commercial districts. The Schenley Bridge connects Pitt and the Carnegie Institute complex to the Phipps and Schenley Park. The Panther Hollow Bridge spans a second hollow to connect the Phipps with the rest of Schenley Park. The Charles Anderson Memorial Bridge carries the Blvd of the Allies over Junction Hollow. A fifth bridge without pedestrian access carries 376 over the hollow. This bridge can be partially glimpsed from the Anderson Bridge, but its presence can be clearly marked by the traffic’s rushing whoosh that carries up the hollow.

By the Forbes Ave and Schenley bridges, Junction Hollow has an industrial feel. The railroad is mostly exposed at these points (further down it is surrounded by trees, shrubs, and other overgrowth). There are also several parking lots and CMU houses some of its facilities functions along the hollow. By the Schenley Bridge, a massive electrical substation was recently constructed across from the historic (and active) steam factory.

The Panther Hollow Bridge provides a completely different feel as its hollow is 100% park. It is the only one of these bridges that does not cross over the railroad and is therefore the only one without a cage. A small lake with walking trail is visible on one side (with the railroad beyond a row of weeds). The other side overlooks a forested hillside and valley floor. Hawks and/or falcons can often be seen gliding over this hollow.

The Anderson Bridge overlooks Junction Hollow at its most parklike point, but it has a less peaceful feel than the Panther Bridge. A combination of the almost-highway Blvd of the Allies, the bridge’s height above the hollow, and its pedestrian fence make the bridge feel isolated from nature when walking across.

Rutland’s Bridge

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While wandering around Rutland, Vermont’s third largest city coming in at around 16,000 residents, I found a bridge. Naturally, I walked across it. The bridge connects the worker housing on the flats to the cultural/civic center on the slope beyond which are the wealthier residences. In addition to overcoming the obstacle of the elevation change, the bridge spans the remnants of the formerly extensive rail yard much of which has been converted to a shopping center.

There was also a railroad bridge near the other end of the shopping center. By the time I found this bridge I was hungry, overcome by the humidity, and over a mile from where I was staying. A little farther on were some creeks that probably have bridges over them. I’ll have to look for those the next time I’m in town.

Beechview Bridges

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Beechview is a neighborhood built on the crest of a hill and spilling down all the sides of the ravines and runs. It claims the steepest paved car “accessible” street in the US, if not the world. Traveling in almost any direction around or through the neighborhood includes an uphill portion. It is a place where anyone driving without chains ought to call in sick or request to work from home after a snow or ice storm to avoid sliding back down the hill when attempting to leave the neighborhood.

Bridges are used to create more level routes, spanning hillsides, runs, and dips. However, none of the two and a half bridges in the neighborhood are for cars. (The half bridge crosses the city boundary into the neighboring borough of Dormont.) The bridges are for the “T”, the local light rail system. Cars are left to manage the ups and downs as best they can. Pedestrians have access to one of the bridges, but otherwise, they are also left to manage the slopes as best they can.

The bridge with pedestrian access was constructed in the era of cages (see post). I am noticing a theme of completely enclosed pedestrian walkways found in association with major transit lines (ex. Beechview’s bridge, Graham Street Bridge, and the former pedestrian bridges over the East Liberty busway) while partially enclosed cages are found in association with roads and rivers (ex. Highland Park Bridge and the pedestrian bridge over Bigelow Blvd).