Wednesday, May 31, 2017

I-74 over Mississippi River

(Bridge Hunter, Historic BridgesJohn Weeks IIISatellite, Street View, Quad-Cities Times has 32 photos)

John A. Weeks III

Modjeski
Built in 1933 and twinned in 1959. It has only two lanes with no shoulders, so talk of replacement has been on going. I saw reference to a cable-stayed design. It appears the current proposal is "dual basket-handle arch bridges with main channel spans of 800 feet" that has 3 lanes with shoulders in each direction. It would also have a "outboard" bicycle and pedestrian path. [Modjeski]

Modjeski

Flickr from Bridge Hunter, License: Creative Commons Attribution-NonCommercial-NoDerivs (CC BY-NC-ND)

Mike Knox posted
Some Mississippi River Solitude under The I-74 Bridge. The most important parts, very few see/ Appreciate.
Flickr from Bridge Hunter, License: Creative Commons Attribution (CC BY)
Boston Public Library
Update:
Retro Quad Cities posted
Susan Olson Shaw Going across that single span bridge terrified me when I was little. I would beg to use the Arsenal Bridge.
The basket-handle arch design for the replacement bridges has been selected for a while. The issue has been funding. An estimate I saw was $791m. [QCtimes] And you know the price will only go up. They also seem to be refining the design because the piers in this conceptualization look different from the Mojeski image above.

Modjeski
Mike Ironman posted two photos that indicate funding must have been secured. Given the budget mess that Illinois had for a couple of years, this is interesting news.

1
[Note all of the cranes in the background on the other side of the river.]

2
Since the old bridges are to be removed after traffic is transferred to the new bridges, I save a copy of the satellite image.

3D Satellite

No comments:

Post a Comment