Cutting edge news. We have been talking about it for weeks, but now the Ames Tribune and KCCI are doing stories. Once again CF is the leading media outlet!
I-35 / US 30 Flyover Progress
- Thread starter scottie33
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Cutting edge news. We have been talking about it for weeks, but now the Ames Tribune and KCCI are doing stories. Once again CF is the leading media outlet!
Basically how it's done up here. I've seen either a slow rolling lane closure for a huge front-end snow blower into trucks or a gang plow to clear snow out of tight spaces in my area.
Both of these are frequently used on an old, narrow stretch with a concrete median on I90 where I used to live.
They really should have full-width shoulders on all new bridges in this day though.
Both of these are frequently used on an old, narrow stretch with a concrete median on I90 where I used to live.
They really should have full-width shoulders on all new bridges in this day though.
It's amazing to me how everyone knows either Structural Engineers or someone at the DOT.
What is the expected bonding to be like at the intersection of the original pour (now chipped-down) concrete and the new pour material? Wouldn't that create a weakend longitudinal joint just below the anchor bolts and embed plates? (Unless rebar will be added by anchoring into the old and extending into the new...)
I probably missed it in the thread but apparently, according to KCCI's report, all of the piers are too tall and each one of them has to be jack-hammered down and re-poured at the top. They said right now it's set to take about 2.5 weeks to fix each of the piers and it's costing the contractor $5,500/day each day that the project is extended. The claim is that taxpayers won't owe more for this and the contractor has to absorb the cost.
So they didn't do inspections on the piers individually as they were going up to ensure correct heights? I don't know how all of that works but figure the mistake would get caught by the time they were looking at the second pier after it was up. Who knows.
By the way, we can't keep the money in state with a contractor from Iowa? We gotta send the money to a contractor from Minnesota? C'mon.
So they didn't do inspections on the piers individually as they were going up to ensure correct heights? I don't know how all of that works but figure the mistake would get caught by the time they were looking at the second pier after it was up. Who knows.
By the way, we can't keep the money in state with a contractor from Iowa? We gotta send the money to a contractor from Minnesota? C'mon.
OK, after watching the KCCI piece (indicating a surveying error as the source of the problem), they are jack-hammering the concrete between the existing rebar cage to create voids. Presumably they can then extend it with new rebar tied to the old, and pour to the correct height.
Boy, what a cluster that project has become. 2.5 weeks for just the demo work. Per pier.
Boy, what a cluster that project has become. 2.5 weeks for just the demo work. Per pier.
In this case it looks like a good thing it isn't an Iowa company. Let Minnesota eat all the cost overruns.
Missed the airing of the report to watch Monte in the summer league.
Link to the KCCI article/footage: http://www.kcci.com/article/uh-oh-c...23-million-project-after-big-mistake/22121540
Link to the KCCI article/footage: http://www.kcci.com/article/uh-oh-c...23-million-project-after-big-mistake/22121540
That sounds like a quick fix and something that will cause problems in the future.
To be fair the owners of the company live in Decorah, IA. They also own Bruening Rock Products, Skyline Construction, Skyline Materials and Bullseye Trucking.
The guy in charge said, "We're confident that the bridge piers will be structurally sound and safe."
Hopefully, he's more confident than they were about the original height of those piers.
I'm going to guess there aren't an overabundance of companies who do that type of work in Iowa. The bids should be public record to find out who did bid it but it is a somewhat "specialized" project.
Easy solution to this. Find a detour for the traffic trying to enter north bound 35 from Hwy 30 and close down entrance ramp. It's a cluster #### on game days with someone trying to enter when everyone is trying to get off.
After watching that, I see that they are having to use little "one hand" jackhammers to get between the rebar -- I'm no expert, but it looks like that would take forever!!!
