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  • #16
    The bridge was inspected in 2006 and nothing was found. The deck needed to be replaced in 2020 according to the reports. I drive that bridge about once a week, today wasn't one of them.

    Part of the problem in the Twin Cities is that they have effectively chocked the traffic with all of the construction. Only I-94 is not going through some kind of major project. I-494, I-694 & I-35 are all going through major projects.

    My first thought about what caused this has a lot to do with MinDot not planning construction better. Because they have chocked off every way in/out and around the the area, people have no alternate routes to really travel. This was one of those alternate routes until the cut it off this spring.

    So they took 8 lanes of congestion, narrowed it into 4 and then put all four lanes on the inside lanes of the bridge. My speculation here is that the bridge was never designed to be 4 lanes with all of the load being carried in the center of the bridge. There was no way to counter balance the load on the inside to the outside because those lanes were closed and they were stripping layers of concrete off making the outside lanes lighter. Over the course of a few months I am sure the weakened the bridge.

    My condolences go out to all that were affected by this tragedy. I only hope my speculation is wrong because if what I think is right, and no one in the planning stages caught it before the tragedy, you have to start wondering about all construction projects. Why? Because I am not the smartest kid on the short bus!
    "Once the people find they can vote themselves money, that will herald the end of the Republic.”
    – Benjamin Franklin

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    • #17
      The local ABC affiliate brought out the 2006 inspection from MNDOT and read off some of it to a guy who has been a struct eng for over 25 yrs. One line that there was fatigue cracking on the span girders and the diaphrams that connect them. The guy immediately said that this could be a significant factor in the collapse.

      The construction work that was going on was mostly surface related, they were not working on the support structure from what has been released. So I don't believe that that work helped cause what happened.

      The governor came out and said that per the MNDOT report last year, the bridge was good until 2020. That's all they can comment on for now. I believe that this report is going to be highly scrutinized and picked apart; with it ultimately being found that the inspection was faulty and that the issues with the bridge were downplayed.

      As others have said, this is a MAJOR highway section and bears a lot of the rush hour traffic. This is going to take 2-3 minimum to clean up and repair. Just figuring out where to send the traffic from this road is going to be a major undertaking.

      I only know one person who was on the bridge, it was one of the execs here at work and he was fine. Just a horrific tragedy.
      All hail the Ruler of the Meadow!

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      • #18
        Originally posted by superfan
        They say anywhere from 100,000 to 200,000 vehicles cross that bridge daily. There are a lot of individuals going to bed tonight simply thankful to be alive.
        I agree. In fact, the first thing I did was think of friends who live in that area and thankfully, nobody was involved in this. My friend tried calling her brother on his cell after this happened and it took like 2 hours before she could even get through. Apparently, cell service was down for a bit.

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        • #19
          When something like this happens, it defies simple logic.
          There just isn't anything that can be said, it's just so sad.

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          • #20
            WOW.

            Very sad.

            Are all the Twin Cities rats accounted for???

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            • #21
              Originally posted by Joemailman
              One of the CNN reporters were saying that there is a dam near the area. He said in recent years there have been a number of bridge collapses near dams because the moving water creates erosion around the bridge pilings. Does the water move fast there due to a dam?
              I don't think that that could be the cause. They were saying on the news that the bridge is unique because the majority of the bridges weight is supported by pillars that are on land, not in the water.

              I could be mistaken, though.
              "I've got one word for you- Dallas, Texas, Super Bowl"- Jermichael Finley

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              • #22
                Originally posted by the_idle_threat
                WOW.

                Very sad.

                Are all the Twin Cities rats accounted for???
                I believe so. Rastak, Harv, and Superfan are all accounted for.
                "I've got one word for you- Dallas, Texas, Super Bowl"- Jermichael Finley

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                • #23
                  Originally posted by BallHawk
                  Originally posted by the_idle_threat
                  WOW.

                  Very sad.

                  Are all the Twin Cities rats accounted for???
                  I believe so. Rastak, Harv, and Superfan are all accounted for.
                  Twin Cities boy here too!
                  All hail the Ruler of the Meadow!

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                  • #24
                    Originally posted by Cheesehead Craig
                    Originally posted by BallHawk
                    Originally posted by the_idle_threat
                    WOW.

                    Very sad.

                    Are all the Twin Cities rats accounted for???
                    I believe so. Rastak, Harv, and Superfan are all accounted for.
                    Twin Cities boy here too!
                    I thought you were in WI. Sorry about that.

                    Glad all of you are safe.
                    "I've got one word for you- Dallas, Texas, Super Bowl"- Jermichael Finley

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                    • #25
                      Another theory. Apparently, this structure is on wheels or a rail kind of thing and it has a couple of feet of give in it. Perhaps it was poorly designed--especially for stressful situations (traffic, heat, fast flowing water, maybe something ran into it). It's likely a combination of things.
                      "There's a lot of interest in the draft. It's great. But quite frankly, most of the people that are commenting on it don't know anything about what they are talking about."--Ted Thompson

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                      • #26
                        Not that it makes it any better but at least it wasnt a terrorist attack.

                        Glad all you guys are OK. My condolences goes out to those that lost their lives and their families.

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                        • #27
                          Originally posted by BallHawk
                          Originally posted by Cheesehead Craig
                          Originally posted by BallHawk
                          Originally posted by the_idle_threat
                          WOW.

                          Very sad.

                          Are all the Twin Cities rats accounted for???
                          I believe so. Rastak, Harv, and Superfan are all accounted for.
                          Twin Cities boy here too!
                          I thought you were in WI. Sorry about that.

                          Glad all of you are safe.
                          No sweat. I'm just not as famous as the other MN Rats.

                          I'm happy they are all good too.

                          Frankly, if you look at what happened, I'm amazed that there weren't more immediate casualties.
                          All hail the Ruler of the Meadow!

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                          • #28
                            The bridge collapse has caused a number of cities to evaluate their bridges.

                            Here in Portland, OR there are a large number of bridges as the Willamette River divides the city in half plus Portland has two major bridges going over the Columbia River to the north.

                            One engineering consultant here pointed out that our bridges last longer than the ones in the upper midwest as Portland does not salt their roads or bridges. Salt has a very corrosive effect on concrete and steel. For what it is worth, his theory was the cumulative effect of winter salting on the Minnesota bridge may have weakened it before its expected lifespan.

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                            • #29
                              Not sure if anyone is still following this or not but found this site about the construction that was going on at the time.

                              C.H.U.D.

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