Location: Comanche County, Oklahoma
Owner: Oklahoma Department of Transportation
Client: Oklahoma Department of Transportation
Construction Cost: $1,446,555
- Bridge Replacement
- Prestressed Concrete Girder Bridge Design
- Hydraulic Analysis/Design
- Highway/Roadway Design
- Final Plans, Specifications, and Estimates (PS&E)
The SH 17 bridge over Cottonwood Creek, which spanned a deep ravine, was considered by the Oklahoma Department of Transportation to be structurally deficient and in need of replacement. The project was combined with the correction of a steep crest curve to the east of the bridge.
Lochner designed a 185-foot-long, three-span prestressed concrete beam replacement bridge, with integral abutments, to be constructed on the existing alignment. To maintain traffic during construction, Lochner also designed a temporary shoofly structure. Because of the ravine location, comprehensive hydraulic analysis and design were required to develop a profile for the shoofly that provided a safe driving gradient but met the hydraulic requirements of the site. Lochner’s highway design plans reduced the gradient of the crest curve to the east to meet current design standards. Lochner developed all roadway plans within the confines of a parallel creek to the south of the bridge, without creating the need for any channel adjustments.