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Author Topic: New I-80 Mississippi River Bridge - Quad Cities  (Read 2290 times)

edwaleni

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New I-80 Mississippi River Bridge - Quad Cities
« on: December 14, 2021, 03:28:19 PM »

Starting thread that started in the "Illinois Notes".

IDOT has started Phase 1 Engineering for the I-80 Bridge Replacement.

Seeing that this part of the Mississippi is navigable, I checked the Army Corp of Engineers online clearance calculator

https://rivergages.mvr.usace.army.mil/bridge_clearance/bridge_clearance.cfm?sid=14685

The low water clearance is 60 feet for this bridge today.

ACoE also posts the current navigation charts for this area of the river. Any new bridge has to respect this requirement.

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edwaleni

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Re: New I-80 Mississippi River Bridge - Quad Cities
« Reply #1 on: December 14, 2021, 03:35:29 PM »

Another navigation issue is the LeClaire Canal on the Iowa side of the river. Not so much a clearance issue, it has been for years a no wake zone for recreational boaters not wanting to get rocked by barge wake. The canal wall has been submerged and will need to be avoided when construction commences.

The Quad Cities area was known to river boat pilots as 13 miles of dangerous rapids during high water, and 13 miles of impossible rapids during low water. The US Army Corps of Engineers worked to clear the snags and build wing dams, but that was more of a band aid than a solution to the rapids. The real solution would be a pair of enormous lock and dam structures.

We are all familiar with the 9-foot navigation channel, and the locks and dams that were built mainly in the 1930s to support the 9-foot river channel. But before the 9-foot channel was built, there was an earlier effort to build a 6-foot navigation channel. One of the few works that survive from the 6-foot channel project is the Le Claire canal and lock.

There is a particularly dangerous stretch of rapids running the location of the present day Lock & Dam #14 to a mile or so above the I-80 Schwengel Bridge just north of the Quad Cities. The design to fix this area started with building a wall down the river channel. The area between this wall and the Iowa bank would be excavated to create a canal. Near river mile 494, it was no longer possible to run the canal in the river channel. As a result, the canal was dug following a slough around the west side of Smith's Island. Since the river dropped approximately 8 feet in this three mile section, a lock would be needed at the south end of the canal.

The canal and lock were built between 1921 and 1924. The structure operated as built until the early 1930's. At that time, the large structure for Lock & Dam #14 was installed. Completed in 1938, it raised the river water a few feet. This had the effect of submerging much of the canal wall north of Smith's island.

Today, the main 9-foot lock is heavily used by river tows. As a result, pleasure craft use the canal. Lights have been installed where the canal wall sits just under the surface of the water. At 320 feet long and 78 feet wide, the old 6-foot lock is obsolete for handling river boat traffic, but it works great for pleasure craft.


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CtrlAltDel

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Re: New I-80 Mississippi River Bridge - Quad Cities
« Reply #2 on: December 14, 2021, 07:13:27 PM »

I would move the bridge around Le Claire to get rid of that speed camera. That might not be high on the list of concerns, though.
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edwaleni

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Re: New I-80 Mississippi River Bridge - Quad Cities
« Reply #3 on: December 15, 2021, 10:34:28 PM »

The picture below is from the Rock Island County ArcGIS system at the parcel level.

I outlined in black which parcels belong to IDOT. On the left there are 7 privately owned parcels along IL-84 hence the "box".

Oddly IDOT does not own the entire riverfront on both sides of the bridge, only what is underneath.

The large open space to the left is a scenic viewpoint only accessible by an exit ramp on the eastbound side.

IDOT also owns as very narrow parcel that fronts IL-84, I assume from when the road was built, it acted as a construction exit/entrance.

Today that lot has a locked gate and the road ends in the woods.

I will see if I can get the Iowa equivalent.

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edwaleni

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Re: New I-80 Mississippi River Bridge - Quad Cities
« Reply #4 on: December 16, 2021, 02:29:19 PM »

Attached below is the parcel map on the Scott County side in Iowa. You will notice that the ACoE map doesn't have exit ramps on the Iowa side, so it appears this was built later.



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edwaleni

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Re: New I-80 Mississippi River Bridge - Quad Cities
« Reply #5 on: December 16, 2021, 02:42:35 PM »

Now that I have seen both sides, I would surmise that they will build a new span on each side of the old one, tear down the middle one and then fill it in with a connected one.

This is under the presumption they don't want to purchase additional parcels.

If they decided to build a whole new span at once, it just couldn't be done here with out either a large riverfront parcel purchase or a massive shoofly to redirect traffic.

Since midwestern DOT's don't seem to be building dedicated spans for each direction (expensive) I don't expect to see two cable stayed bridges across the river.

Illinois has more room to work with than Iowa does as they own more riverfront land.

I can't think of a good reason why they would relocate it farther upstream. It would require a massive purchase of parcels, all for what? Connect it to I-88 better? Bah.


« Last Edit: December 16, 2021, 08:34:19 PM by edwaleni »
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Rick Powell

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Re: New I-80 Mississippi River Bridge - Quad Cities
« Reply #6 on: December 16, 2021, 06:36:37 PM »

Attached below is the parcel map on the Scott County side in Iowa. You will notice that the ACoE map doesn't have exit ramps on the Iowa side, so it appears this was built later.

Look very closely at the ACOE map, the ramps are there, but not highlighted for some reason like the IL side. A mapmaker's oversight?
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edwaleni

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Re: New I-80 Mississippi River Bridge - Quad Cities
« Reply #7 on: December 16, 2021, 08:28:46 PM »

Attached below is the parcel map on the Scott County side in Iowa. You will notice that the ACoE map doesn't have exit ramps on the Iowa side, so it appears this was built later.

Look very closely at the ACOE map, the ramps are there, but not highlighted for some reason like the IL side. A mapmaker's oversight?

You are correct! Hard to see even on the original ACoE website.
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triplemultiplex

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Re: New I-80 Mississippi River Bridge - Quad Cities
« Reply #8 on: December 21, 2021, 12:27:18 PM »

In terms of r/w impact, the new bridge likely needs more land if one keeps the existing interchange configurations.  Though there may be some options there to keep things compact or restrict the impacts to open land. It is worth noting that the sewage treatment plant for LeClaire is in this area (at the west end of Iowa Dr which is on top of the bluff, oddly enough) so there might be more complicated utility relocations if a new span goes upstream.

Iowa side, it looks like a horse apiece.  Illinois, maybe a slight advantage to downstream since the overlook means there's already r/w that won't need to be bought out.
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edwaleni

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Re: New I-80 Mississippi River Bridge - Quad Cities
« Reply #9 on: December 21, 2021, 01:54:38 PM »

In terms of r/w impact, the new bridge likely needs more land if one keeps the existing interchange configurations.  Though there may be some options there to keep things compact or restrict the impacts to open land. It is worth noting that the sewage treatment plant for LeClaire is in this area (at the west end of Iowa Dr which is on top of the bluff, oddly enough) so there might be more complicated utility relocations if a new span goes upstream.

Iowa side, it looks like a horse apiece.  Illinois, maybe a slight advantage to downstream since the overlook means there's already r/w that won't need to be bought out.

LeClaire has a sewage lift station on the riverfront, just north of the bridge. They have an easement through IowaDOT and under the exit ramps to get that sewage up to the plant.
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iowahighways

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Re: New I-80 Mississippi River Bridge - Quad Cities
« Reply #10 on: May 12, 2022, 08:28:56 PM »

Thread bump time: An online meeting was held last night by the Iowa and Illinois DOTs. Seven alternatives were discussed, including four that would allow for the Bison Bridge repurposing to go forward.

Story: https://www.kwqc.com/2022/05/12/illinois-iowa-dots-lay-out-7-options-new-i-80-bridge-bison-bridge-still-up-air/?fbclid=IwAR1Jb8cGy-gx2WkPXYeR4eeUSbnsrbLykZ5N9_oofSxWwLiQVT-_rmRPEF0

Materials from the meeting: https://www.i80mississippibridge.com/meeting-materials
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edwaleni

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Re: New I-80 Mississippi River Bridge - Quad Cities
« Reply #11 on: May 12, 2022, 09:46:31 PM »

Thread bump time: An online meeting was held last night by the Iowa and Illinois DOTs. Seven alternatives were discussed, including four that would allow for the Bison Bridge repurposing to go forward.

Story: https://www.kwqc.com/2022/05/12/illinois-iowa-dots-lay-out-7-options-new-i-80-bridge-bison-bridge-still-up-air/?fbclid=IwAR1Jb8cGy-gx2WkPXYeR4eeUSbnsrbLykZ5N9_oofSxWwLiQVT-_rmRPEF0

Materials from the meeting: https://www.i80mississippibridge.com/meeting-materials

I have nothing against improving our harmony with nature, but watching some bison run across a bridge is not one of them.  Bison need open space and lots of it.

As much as we want to compensate for the near elimination of the North American bison, we can't undo what has been done nor can we recreate what they were.

Like the wildebeest of Africa, they technically need to migrate.  Here, they will always be reliant on man to feed them, vaccinate them and look after them.  I am not exactly clear how building a bridge for them will somehow improve their standing other than being an expensive zoo. Humans and bison are incompatible when in close proximity in the wild. Simply scanning YouTube and all of the postings of totally insane people trying to warm up to them along the highway and getting their clothes ripped off as they get tossed in the air. Gorings, while rare, do occur.

So while I applaud the NEPA work, I think there are *way* better places to spend that kind of money to establish a bison sanctuary.

This national trend to retain obsolete bridges for alternate uses has been growing, some of them have merit, many of them don't. The NFP's typically can't raise enough money to pay for them and the states involved can't even afford to keep their own parks open, let alone get a ranger on the property.

Hey if they raise the dough and can manage it themselves, more power to them. But they shouldn't be holding up the replacement of a national artery just to tickle ones animal preservation fantasy.

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Revive 755

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Re: New I-80 Mississippi River Bridge - Quad Cities
« Reply #12 on: May 12, 2022, 10:20:45 PM »

The
Materials from the meeting: https://www.i80mississippibridge.com/meeting-materials

The range of alternates for the I-80/I-88 interchange seems odd:

A) Enlarged cloverleaf, minor adjustments to the EB I-88 exit to Old IL 2 and the WB I-88 ramp to the short CD roadway between the interchanges

B) Same as A but with an EB I-80 to EB I-88 turbine ramp

C) Enlarged cloverleaf with an EB I-80 to EB I-88 flyover, the Old IL 2 interchange is rebuilt into a configuration kind of resembling I-94 at WI 100 in the Milwaukee area with a U-shaped ramp to go WB on I-88.  The short C-D roadway between the interchanges is removed.

D) Four level stack for I-80 at I-88, same improvements as C for the Old IL 2 interchange.

Seems like there should be something between just one flyover/turbine ramp and a full stack.
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ilpt4u

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Re: New I-80 Mississippi River Bridge - Quad Cities
« Reply #13 on: May 13, 2022, 07:25:38 AM »

The
Materials from the meeting: https://www.i80mississippibridge.com/meeting-materials

The range of alternates for the I-80/I-88 interchange seems odd:

A) Enlarged cloverleaf, minor adjustments to the EB I-88 exit to Old IL 2 and the WB I-88 ramp to the short CD roadway between the interchanges

B) Same as A but with an EB I-80 to EB I-88 turbine ramp

C) Enlarged cloverleaf with an EB I-80 to EB I-88 flyover, the Old IL 2 interchange is rebuilt into a configuration kind of resembling I-94 at WI 100 in the Milwaukee area with a U-shaped ramp to go WB on I-88.  The short C-D roadway between the interchanges is removed.

D) Four level stack for I-80 at I-88, same improvements as C for the Old IL 2 interchange.

Seems like there should be something between just one flyover/turbine ramp and a full stack.
Hey, IDOT has gotta start somewhere to get into a Full Four Level Stack. Might as well be here!
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