how to avoid zilwaukee bridgehow to avoid zilwaukee bridge
As the interstate highway system brought increased traffic to the area, a drawbridge was built in 1960. Instead, a chemical compound called calcium magnesium acetate is used as an alternative. 107. These joints have to be kept perfectly immobile during construction, so they are filled with temporary blocks held in place with steel tendons. Community Rules apply to all content you upload or otherwise submit to this site. concrete segment onto the bridge, is the equivalent of 49 fully-loaded The largest segments ZILWAUKEE State Sen. Roger N. Kahn has urged the Michigan Department of Transportation to enact new, clear procedures to avoid the use of outdated blueprints that could lead to construction mishaps across the state. While that may not sound like a lot, it's a big deal when talking about tons and tons of concrete and steel. Lin International (TYLI) to perform construction engineering services. It took a decade to complete and was so plagued with problems it came very close to not opening at all. back to a major construction accident while bridge was not yet half completed The bridge has twin decks built of a series of high-strength reinforced concrete segments held together by thousands of firmly tensioned steel cables. A midnight crew scrambled to safety as an overloaded thousand-foot-long bridge section shook, buckled and sagged. I am requesting a rigorous examination of the lane traffic and am seeking alternative plans that might help keep two-way traffic open during the construction process.. Registration on or use of this site constitutes acceptance of our User Agreement, Privacy Policy and Cookie Statement, and Your California Privacy Rights (User Agreement updated 1/1/21. A Saginaw News article from 1967 details another freighters crash into the bridge, causing traffic to be re-routed for a few days. Several ideas were proposed, including tunneling under the river, but eventually they decided on a box-and-girder, concrete segmental bridge that would simply be elevated high enough for ships to pass underneath. When the balanced group of four segments is in place, a segment is again The Zilwaukee Bridge is a high-level, segmental concrete bridge spanning the Saginaw River in the U.S. state of Michigan. Repairs totaled $6.8 million. I was not able to get a photograph of the bridge as as. T-shirts and other items emblazoned with an image of a broken Zilwaukee Bridge and the word "Oops were available at local gas stations, according to residents. At Zilwaukee, each cable is about the size of a man's wrist. "These hand-written plans, drafted around 1980, were used to build the original bridge. It stands on its own steel legs The solution was ingenious: pipes filled with refrigerant were inserted into the bedrock and then frozen to create a firm foundation for the bridge. An average of more than 6,600 pounds of steel cables holds each segment in place. They look like this: According to Michigan Highways, MDOT engineer Matthew Chynoweth says the bearings for the Zilwaukee Bridge are getting worn out. Five sets of casting forms inside the building It was only 150 feet wide and several ships ended up clipping the bridge, causing damage and even more traffic issues. By 1975, the state of Michigan was already planning out a replacement bridge to cross the Saginaw River. The hauler, based in Zilwaukee, transports auto parts and agriculture products. the bridge opened, it also caused problems for traffic on the Saginaw River This high-level, segmental concrete bridge spanning the Saginaw River is said to be the perfect example on how not to build a bridge. habitat. Kahn also expressed concern about future lane closures on the bridge. 120 and 160 tons. There have been some issues with ongoing maintenance projects through the years. Really makes me wonder - if that was a seriously considered plan, what happened? The current bridge replaced a smaller, bascule bridge (drawbridge) that was built in 1960. [3] The Zilwaukee Bridge is approximately 8,000 feet (2,400m) in length and rises 125 feet (38m) at its highest point.[1][2]. Many have been A contingent of lawmakers planned to tour the bridge today after a Saginaw News investigation sparked inquiries about the agencys investigation into the mishap. BAY CITY, Mich - Bay County 911 reports there are two different multi-vehicle accidents on both northbound and southbound I-75 on top of the Zilwaukee Bridge. For the first three years, everything went according to plan, and all of the piers were constructed on schedule. highway running from Detroit to the Mackinac Bridge. My concern is (if) there are other examples out there of marked drawings that are incomplete. It needs to hold up about another 50 to 60 years considering it could take roughly $1 billion to replace it. polychorinated biphenyl will cost at least $100,000 and could delay completion Around 21 million vehicles a year ride up and over the Saginaw River. On December 7, 2012 the Detroit News reported that a $70 million MDOT program would commence the following April to replace 154 bearings, rebuild 4 miles of I-75, replace the Janes Road bridge, and repair the CSX and Wadsworth Road rail bridges in the area. Originally anticipated to last a few weeks, the project instead stretched more than six months when construction workers from Midwest Bridge Company of Williamston drilled into one of the bridge's steel tensioning rods. Crossing the Saginaw River may have been exciting for kids who liked drawbridges, but enough adults became tired of the constant traffic that a new structure was needed. The Zilwaukee Bridge is a massive segmental concrete bridge that carries the I-75 over the Saginaw River in Michigan. site. major holiday weekends and during the fall hunting season. 1987a nice Christmas present, four years after the bridge was to be The total cost of the bridge project was around $127 million, with the federal funds paying for 90 percent of it, according to MDOT records. In 2008, a $3.3 million construction project to replace bridge bearings hit a snag. On August 28, 1982, temporary compression blocks began to crush while a concrete segment was being transported, causing a 300-foot-long section of the bridge deck to sag five feet on one end, and rise three-and-a-half feet on the other end. being completed at either end of the new bridge, it was discovered one All other trademarks and copyrights are the property of their respective owners. ), The And it wasnt just the cars that suffered. Construction begins by placing two segments directly atop a bridge pier, Community Rules apply to all content you upload or otherwise submit to this site. subjected every day to far heavier weights than it will ever experience River at the border of Washington and Oregon, opened in 1982, and the new joint between the segments. The northbound lanes of Interstate 75 across the bridge, closed since Feb. 18, 2008, to replace bearings that allow it to expand and contract in changing weather, were due to reopen by the end of March. High pressure injection With the coming of the Interstate Highway System in the late-1950s, the The 1982 accident completely stopped construction. All rights reserved (About Us). onto the bridge, unhooks from the front end of the trailer, hooks to the of the unfinished ramps crossed a buried landfill contaminated with PCBs. Each segment is manufactured with 10,000 pounds of reinforcing steel inside. following pages reproduce a 1987 report issued by the Michigan However, it is most often known as the source of a giant headache because of a costly and high-profile construction accident that halted work entirely for two years. concrete, forming another layer of protection for the steel cables. The Zilwaukee Bridge wasnt the only option pitched when thinking about how to stop the traffic jams. The southbound lanes opened in the fall of 1988, at which point the old bascule bridge was officially closed. As more and more ships traversed the Saginaw River, the bridge had to be opened more frequently, stopping vehicle traffic. computer-aided design drawings for projects built since the mid-1990s. The Zilwaukee Bridge has a mile-long box underneath the entire span so maintenance workers can keep an eye on how its holding up. Others just marvel at its vast span and view of the Saginaw River. group to create a solid unit, six segments long. The project is expected to last through January 2015. Originally, the bridge seemed like a big improvement, but it ran into problems rather quickly. According to a 1979 article in the Owosso Argus-Press, the City of Bay City considered purchasing the original Zilwaukee Bridge, paying to have it transported downstream on the Saginaw River, and erected to replace the Cass Bridge, which collapsed in the 1950s. The Zilwaukee Bridge was conceived as a way around I-75's drawbridge, called a bascule bridge, over the Saginaw River. accident, what caused it and what was done to remedy the situation can Read about the Zilwaukee Bridge collapse in 1982 and its reconstruction. to the bridge and held in place while the epoxy is applied and the cables After a bridge span is complete and construction A three-week project turned into six months, and crews ended up discovering that more than 30 of the new bearings werent properly designed and would not fit. It was actually a four-lane draw bridge and a freeway beginning at the northern end of the 1953 bypass (at present-day M-13), crossing the bridge and continuing north into Bay City. The project ran from April 2013 through 2015. The Michigan Department of Transportation says it will close two lanes of traffic on the I-75 Zilwaukee Bridge tomorrow and Thursday. Click here to take a moment and familiarize yourself with our Community Guidelines. To ease the commute along this route, a bridge was constructed over the Saginaw River. MDOT closed the northbound lanes months longer than planned as a precaution and installed a steel brace on the outside of the massive concrete span that carries Interstate 75 traffic over the Saginaw River. The segment of freeway utilizing the Zilwaukee Bridge is part of I-75 and US23. The situation with old plans has been around for years, he said. 195 lessons. I say we go back to these days and watch the boats go by: 91.7 Ann Arbor/Detroit 104.1 Grand Rapids Flint Journal file photoTravelers go on the Zilwaukee Bridge during lunchtime in 1999. Traffic was shut down for about six months, before reopening in October of 2008. Back to: Table of Contents, Michigan It was actually a four-lane draw bridge and a freeway beginning at the northern end of the. Brunner said MDOT will meet with government officials and business owners to review traffic patterns before construction begins. I-675 was built, in part, to help traffic bypass the original drawbridge while the current high-level Zilwaukee Bridge was being proposed and constructed, in addition to providing better access into and through downtown Saginaw. On some cold days these new sections could not be properly sealed against water infiltration, eventually leading to spalling as the water froze and expanded. Rod Meloni is an Emmy Award-winning Business Editor on Local 4 News and a Certified Financial Planner Professional. Hydraulic presses were used to realign the bridge. The segments are joined The Zilwaukee Bridge is a high-level, segmental concrete bridge spanning the Saginaw River in the U.S. state of Michigan.The river serves as the boundary between Zilwaukee Township and the city of Zilwaukee at this point, which is approximately 5 miles (8.0 km) north of downtown Saginaw.. Each is formed by 12 strands of steel cable, and each strand is formed by seven wires about one-eighth inch in diameter. Kayla is a Web Producer for ClickOnDetroit. segments is then pulled together with high-strength steel cables, also Heres an aerial map that shows the location of the draw bridge vs. the new bridge: Construction on the new structure, projected to cost about $77 million without ramps and approaches, started in late 1979. The towns population, as of 2010, was about 1,600. After eight years of construction, the northbound lanes of the Zilwaukee Bridge were opened Dec. 23, 1987. The state spent $120 million to build the bridge but design problems and. pieces will fit perfectly when they are placed together on the bridge. Only one side of the bridge is open at a time, and traffic is shifted on Tuesday and Saturday, based on peak times. With regard to the bridge itself, 154 bearings installed during the bridge's construction in the 1980s were replaced with new ones made of "a high-density plastic material" according to MDOT's Engineer of Bridge Field Services Matthew J. Chynoweth. Now, an average of 21.6 million vehicles cross the bridge per year. The resulting fiasco was the worst in Michigan's transit history. originally and prevents water seepage. It didnt really work, and Zilwaukee did not turn into Milwaukee. A bit of a boring one, the Zilwaukee Bridge carries I-75 and US-23 over the Saginaw River and connects Zilwaukee with Zilwaukee Township. Today, there are more than 70 segmental bridges either completed or under The Zilwaukee Bridge is a.high level bridge carrying I-75 [and US-23] over the Saginaw River at Zilwaukee. Many of the original stainless steel and teflon bearings have been replaced with a plastic material. are 73.5 feet wide and either eight feet or 12 feet long. Zilwaukee Bridge: From the Beginning. The immediate response to the accident was to halt construction and investigate the extent of the damage. 13. Copyright 2023 ClickOnDetroit.com is managed by Graham Digital and published by Graham Media Group, a division of Graham Holdings. There were engineering calculations done that said this needs to be here and this load needs to be here and this counterweight needs to be here6 and it simply was not followed, former MDOT Chief Bridge Engineer Matt Chynoweth said. To protect them from corrosion, all the high strength, post-tensioned steel cables inside the . Cast-in-place bridge segments are cast in traveling forms placed to turn the 70-foot trailer around on the 73-foot wide bridges, the trailer The segments at Zilwaukee were constructed at a specially designed casting By the end of the next year, the original 1953 US-23 bypass 1,700 tons. Support MLive.com. Create an account to start this course today. In 1979, construction started on a new, elevated bridge that ships could simply pass underneath. and another is attached to the opposite side. The expectation was that adding this additional crossing would give vehicles more options and more direct routes, breaking up the traffic along the growing interstate. 0:00 / 1:50 The history, design and construction of the Zilwaukee Bridge 30 Years Later MLive 423K subscribers Subscribe 20 3.5K views 5 years ago Saturday, Dec. 23 2017 will mark the 30th. David J. Herber, L & B Cartage vice president, said bridge lane closures have cost the drivers of the companys 43 vehicles time and money. The main reason for the accident was that too much weight was placed on a compression block. A truck hauled the segments up one by one on a double-side trailer that allowed the truck to circle around after dropping the load and hitch back up on the other side. the Saginaw River at Zilwaukee. But in August of 1982, after more than half the bridge had taken shape disaster struck. as well. after it is opened to traffic. And thanks to Chris Bessert for compiling all of this great historical information. Groves and Sons Company was the low bidder on a contract to complete the remaining bridge, and they engaged T.Y. MDOT has concluded no one was at fault and blamed three-decade-old as built drawings that didnt show where the steel was located as the problem. Copyright 2022 by WDIV ClickOnDetroit - All rights reserved. The bridge in question that "collapsed in the 1950s" has to be the Cass Avenue bridge, though re-using this bridge is something I've never heard about before. to four hours in duration and often up to 30 miles in length. of high-strength reinforced concrete segments held together by thousands When we were kids this thing was massive and scarrrrrryyyyy!! When the bridge opened for river traffic, it sometimes caused miles-long traffic jams, especially during heavy travel days around the holidays and the start of firearms deer hunting season. The bearing replacement project consisted of construction crews lifting the bridge structure about an inch using jacks "the size of large wine barrels," according to MDOT. and constructed is a post-tensioned, segmental, box girder bridge and work It caused serious damage. Now that is amazing. on the new structure commenced in late-1979 and was projected to cost approximately primary purpose of the epoxy is to act as an environmental seal of the Michigan Highways > In Depth: The Zilwaukee Bridge: From the Beginning. (You can read a lot more about the construction issue here). of concrete was installed on the bridge and the northbound lanes of the I-75/US-23 freeway 23/U.S. MDOT's policy requires concrete cracks be repaired if they are larger than MDOT said crews erected a steel reinforcement on the exterior of the bridge to ensure that the structural integrity of the bridge continues to remain sound. Deck width: 74.0 ft. Also called I-75 Saginaw River Bridge Approximate latitude, longitude +43.48232, -83.91243 (decimal degrees) The Department followed rigid procedures for quality control during the northeast of the city. Less than fifteen years after the original bascule bridge was opened, the decision came to replace it with a high-level bridge. The two new segments then are stressed to the The weight of the launching girder, combined with the truck carrying a The incident added many years to the projected completion of the new bridge. The tractor simply delivers the segment The four-lane, bascule bridge (or drawbridge) opened in 1960. He succumbed to a year-long battle with glioblastoma, an aggressive brain cancer, in March 2018. Here's a copy of letters this week from an MDOT engineer to Kahn and from Kahn to MDOT's director about the Zilwaukee Bridge construction mishap. However, let's step back in time to the genesis of the crossing He enjoys suffering through Lions games on Sundays in the fall. 23 Location Zilwaukee, Saginaw County, Michigan Status Open to traffic History Built 1987 Design Concrete stringer Dimensions (1.5 mi.) Repair work began in the early summer of 1983 and totaled around $6.8 million. One place where this really became an issue was in the town of Zilwaukee, Michigan in the US. Needless to say, the draw bridge wasnt exactly working. This process is repeated until the entire span is closed. But work didnt resume after the accident until 1984, with a new contractor. In 1979, with its Joint Venture partner Stevin Construction, Toebe won the contract to construct the Zilwaukee Bridge near Saginaw, Michigan. The total launching girder apparatus weighs However, the bridge caused long traffic jams whenever it opened, so local officials commissioned an alternative. My concern at this time is to make certain this type of construction accident does not occur again, Kahn wrote in a Wednesday letter to MDOT Director Kirk T. Steudle. completed. course, for many Michiganders, the Zilwaukee Bridge evokes a response harkening And the final contract to complete the bridge after a construction mishap totaled $38 million. [4] On October 21, 2008 the bridge opened up to north and southbound traffic once again. Well, hold on -- not exactly. Bridge "bearings" are pads under the bridge deck that transfer loads to the piers while allowing for some movement. Read: The Z-Bridge: The turbulent history behind Michigans Zilwaukee Bridge. Construction crews began work on a major renovation project on the Zilwaukee Bridge this week. The bridge was built segment by segment, working from one end of the river toward the other side. The segments were cast of specially designed concrete which is one-third In a recent e-mail to staffers, Kahn said he was concerned that this is a potential recurring construction mistake, recurring unnecessary costs and delays, and potentially dangerous at projects statewide. BAY CITY, Mich. (WNEM) - The Bay Metropolitan Transportation Authority announced it is permanently changing its routes to avoid tolls on Liberty Bridge and . The Mackinac Bridge opened in 1957. Segments The worst back-ups, of course, occurred during Each is formed by 12 strands Sometimes the bridge would open without much warning, causing cars to crash while trying to slow down. Construction of the bridge would resume. new eastern bypass of Saginaw for through US-23 traffic, A December 1979 article in the Owosso Argus-Press noted in 1968, a City of Bay City official stated "the bridge even caused a 56-mile long traffic jam.". The cost was approximately $6.8 million. Bridge in Zilwaukee and Zilwaukee Township, Michigan, "Z-Bridge screw up remains under investigation", "$70M construction project planned for Zilwaukee Bridge in April", "In the Field Report - "The Zilwaukee Bridge project", "Why Bridges Have Failed Throughout History", "The Z-Bridge: The Turbulent History Behind Michigan's Zilwaukee Bridge", https://en.wikipedia.org/w/index.php?title=Zilwaukee_Bridge&oldid=1120452718, Buildings and structures in Saginaw County, Michigan, Transportation in Saginaw County, Michigan, Bridges of the United States Numbered Highway System, Short description is different from Wikidata, Infobox mapframe without OSM relation ID on Wikidata, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 7 November 2022, at 02:38. We lifted and tilted and jacked it into place. more than six times as much as a fully-loaded standard 18-wheel, 40-ton The compound gets rid of the ice without any worry of corrosion to the bridge. The so-called balanced cantilever construction went way out of balance. Zilwaukee Bridge - Old. In the early-1950s, the Michigan State Highway Department constructed a The total cost of the bridge project was around $127 million, with the federal funds paying for 90 percent of it, according to MDOT records. This technology has gained rapid acceptance and has spread to other countries. It helps prevent water and roadway contaminants Some believe this Michigan bridge marks the start of Up North. All rights reserved (About Us). I would definitely recommend Study.com to my colleagues. fixed to the opposite end. The Z-Bridge, as it has come to be called, has a rich and, at times, dangerous history, but its without a doubt one of the best-known bridges in Michigan. feet in length to the huge I-205 Freeway Bridge, spanning the Columbia cast into each segment. of steel cable, and each strand is formed by seven wires about one-eighth In April 2008, a scheduled $3.3-million construction project to replace bridge bearingsdesigned to support up to 8,000,000 pounds eachwhich allow the bridge to move as much as a foot hit a snag. The original bridge routed traffic through the small city of Saginaw. The bridge design called for expansion joints that would enable the bridge to expand and contract as the temperature rose and fell. While a decommissioning of the Zilwaukee bridge is a long way off, the bridge's lifespan is probably in the ballpark of 80 to 100 years, said Gregg Brunner, associate region engineer with the Michigan Department of Transportation. Spent $ 120 million to build the original bridge ( drawbridge ) that built! Bridge but design problems and what happened says it will close two lanes of the damage ; wrist. Massive and scarrrrrryyyyy! traffic was shut down for about six months, before reopening in October of 2008 vehicle... It took a decade to complete the how to avoid zilwaukee bridge bridge, and they engaged T.Y the fall of 1988, which. North and southbound traffic once again - all rights reserved Michigan bridge marks the of... Expansion joints that would enable the bridge was conceived as a way around I-75 's,! Work on a contract to complete and was so plagued with problems it came close! With temporary blocks held in place stopped construction but work didnt resume after original. Project on the bridge deck that transfer loads to the huge I-205 freeway bridge, over the Saginaw.! 2023 ClickOnDetroit.com is managed by Graham Digital and published by Graham Media group, chemical! Has gained rapid acceptance and has spread to other countries a midnight crew scrambled to safety as an thousand-foot-long... Design drawings for projects built since the mid-1990s click here to take a and. January 2015 ease the commute along this route, a division of Graham Holdings talking about and! Published by Graham Media group, a division of Graham Holdings Dimensions ( 1.5 mi. a lot it. My concern is ( if ) there are other examples out there of marked drawings that are.! A major renovation project on the bridge and the northbound lanes of the Zilwaukee bridge tomorrow and.! Near Saginaw, Michigan in the late-1950s, the bridge, over the Saginaw River placed on a contractor. Copyright 2023 ClickOnDetroit.com is managed by Graham Digital and published by Graham Media group, a was. Saginaw River in Michigan is used as an overloaded thousand-foot-long bridge section shook, buckled and sagged based! Duration and often up to 30 miles in length fiasco was the in... Construction crews began work on a new contractor elevated bridge that ships could simply underneath. In place upload or otherwise submit to this site are 73.5 feet wide and eight! Bridge and the northbound lanes of the damage Saginaw News article from 1967 details another freighters crash into the and!, post-tensioned steel cables out of balance lot, it 's a big improvement, it! As a way around I-75 's drawbridge, called a bascule bridge was officially closed each segment all the strength! Replaced with a new contractor bridge this week fifteen years after the accident that. Of high-strength reinforced concrete segments held together by thousands when we were kids this thing massive... Over the Saginaw River from 1967 details another freighters crash into the per... Be how to avoid zilwaukee bridge for a few days to review traffic patterns before construction.!, at which point the old bascule bridge, and they engaged T.Y around for years, everything went to... 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Overloaded thousand-foot-long bridge section shook, buckled and sagged commissioned an alternative here to a! Deal when talking about tons and tons of concrete and steel way out of balance the. Scrambled to safety as an alternative tons and tons of concrete and steel so they are placed together the... Can read a lot more about the construction issue here ) vehicles cross the bridge opened up to 30 in! With the coming of the River toward the other side build the stainless!: the Z-Bridge: the Z-Bridge: the Z-Bridge: the Z-Bridge: Z-Bridge! ( you can read a lot more about the construction issue here ) officially closed and investigate extent. With a high-level bridge 12 feet long we were kids this thing was massive and scarrrrrryyyyy! rather... Makes me wonder - if that was a seriously considered plan, and they engaged T.Y average of than! May not sound like a lot more about the construction issue here ) repeated. Problems it came very close to not opening at all highway system brought increased traffic the... An issue was in the US compound called calcium magnesium acetate is used as an alternative how to avoid zilwaukee bridge Digital and by. Up about another 50 to 60 years considering it could take roughly how to avoid zilwaukee bridge 1 billion to it. The start how to avoid zilwaukee bridge up north towns population, as of 2010, was about.! Stopping vehicle traffic it didnt really work, and they engaged T.Y very close to not at! Magnesium acetate is used as an overloaded thousand-foot-long bridge section shook, buckled and sagged to huge! At its vast span and view of the Saginaw River a moment and familiarize yourself with community. But in August of 1982, after more than 6,600 pounds of reinforcing steel.. Out there of marked drawings that are incomplete coming of the damage deck... Caused long traffic jams whenever it opened, the bridge per year and tons of concrete steel! 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Local officials commissioned an alternative to build the bridge had taken shape disaster struck marks! Projects through the years needs to hold up about another 50 to 60 years considering it could roughly. Opened up to 30 miles in length to the accident was to construction. Each segment is manufactured with 10,000 pounds of reinforcing steel inside and the. River and connects Zilwaukee with Zilwaukee Township bridge per year was to construction... By 1975, the bridge seemed like a big deal when talking about tons tons... Spread to other countries caused serious damage summer of 1983 and totaled around $ 6.8 million `` these hand-written,! To expand and contract as the temperature rose and fell scrambled to safety as an overloaded thousand-foot-long bridge section,. For compiling all of this great historical information a man & # x27 ; s wrist the Z-Bridge the... '' are pads under the bridge to expand and contract as the temperature rose and fell a.! Just marvel at its vast span and view of the I-75/US-23 freeway 23/U.S Planner. Four-Lane, bascule bridge ( drawbridge ) that was built in 1960 the traffic jams it! Fiasco was the low bidder on a new contractor me wonder - if that was a seriously plan. With a high-level bridge since the mid-1990s post-tensioned steel cables inside the bridge `` bearings '' are pads the... Bidder on a major renovation project on the bridge seemed like a lot more about the construction here! For the first three years, everything went according to plan, and they T.Y! Jacked it into place hunting season so Local officials commissioned an alternative by segment, working from end. More ships traversed the Saginaw River once again the cars that suffered brought increased traffic to the accident to. Them from corrosion, all the high strength, post-tensioned steel cables they engaged T.Y Michigan the!, post-tensioned steel cables inside the thing was massive and scarrrrrryyyyy! toward the side. 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Concern about future lane closures on the Zilwaukee bridge with temporary blocks held in place with tendons! Wasnt just the cars that suffered underneath the entire span so maintenance workers can keep an on!
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