Keosauqua Bridge Replacement

The New Keosauqua Bridge is finally finished.

I put together a book of the construction sequence and it is available. Just hit the link.

The New Keosauqua Bridge by Stuart Nielsen

The Keosauqua Bridge started construction in November 2005.

Construction photos provided by Jacki Gunn, Tom McKay, Ann Glover, and others.

Photos pages are listed below, with "Month,Date,page" posted.

N20 D6 D6b D31 J1 J17 J18 F1 F1a F1b F1c F1d
F1e F7a F7b F7c F9a F9b F9c F10a F10b M6a M6b M6c
M8a M8b M10 M13a M17a M17b M23a M23b M31a M31b A4a A4b
A4c A4d A7 A10 A19 M5a M5b M5c M16 M23a M23b M23c
M23d J6 J9 J13a J13b J15a J15b J15c J15d J15e J15f J19
J25 J26 J27 J12a J12b J12c J12d J12e J18 A3a A3b A3c
A10 A16 A18a A18b A24a A24b A24c A24d A29 S1a S1b S1c
S5 S13 S22 S25 O6 O9a O9b O9c O16 O17 O24a O24b
O24c O24d N1 N3 D7 D8 D26a D26b D26c D26d D26e D26f
D26g D26h D28 J8 F1 F21a F21b M16 A11a A11b A11c A11d
Alle A11f April11g July30 07 July31 07 Aug3a 07 Aug3b 07 Aug3c 07 Aug28 07 Sept5 07 Sept5 07 Sept12 07
Sept19 07 Oct17 07 Oct17 07 Nov8 07 Nov9 07 Nov15 07 Dec24 07 Jan14 08

 

The existing Keosauqua Bridge is a four span truss. The replacement bridge will be a three span haunched girder bridge. (Concept 2 shown below) The spans for the new steel haunched girder bridge will be 210' - 260' - 210'. The new steel plate girder will change from 6 feet deep at the center of the spans to 12 feet deep at the piers. The replacement bridge will also have a number of aesthetics details including innovative pier designs, extensive concrete formwork, and pier overlooks.

 
Existing Keosauqua Truss Bridge

Model of the New Pier Design. (Models by Kimball Olson)
Model showing the underside of the bridge.

Model of the new column at the front of the piers. The top of the pier column will contain stonework from the existing bridge.
Model of the pier overlook and the upstream side of the pier.