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Innovative Bridge Slide Case Study: MaSSENA Lateral Bridge Rehabilitation Project

This case study examines the MaSSENA Lateral Bridge rehabilitation project, located on IA 92 over a small natural stream, one mile west of IA 148. This bridge, originally constructed in 1930 and reconstructed in 1949, has undergone several modifications including overlays and retrofitting. The focus of the project is on the slide technique used to safely move and position the bridge's structure, ensuring it can continue to serve the community while meeting modern safety standards.

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Innovative Bridge Slide Case Study: MaSSENA Lateral Bridge Rehabilitation Project

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  1. MaSSENA LATERAL BRIDGE SLIDE CASE STUDY Jim Nelson, Iowa DOT
  2. Project location IA 92 over Small Natural Stream, 1.0 mile west of Jct. IA 148
  3. Project location
  4. Existing structure 40’ x 30’ Steel I-beam Constructed 1930 Reconstructed 1949 Overlay 1968 Retrofit rail 1992 Overlay 1998
  5. Existing structure Structurally deficient – sufficiency rating is 38.2 Bridge is not adequate for legal loads – posted “One truck at a time.”
  6. Proposed replacement bridge Pretensioned Prestressed Concrete Beam Bridge
  7. Mobility impacts Detour traffic for duration of construction 7 miles out of distance travel for detour AADT (2012) – 1,460 w/ 16% trucks User costs for 180 day detour Indirect $437,000 Direct $15,000 (Co. Road Maint. & Detour Signing)
  8. Project staging area
  9. Utah DOT WANSHIP BRIDGE SLIDE
  10. Bridge construction visualization
  11. Semi-integral abutment Abutment Diaphragm Details – sheet number 14
  12. Sliding pad Superstructure Details – sheet number 15 Bonded PTFE surface on bearing pad detail
  13. Project cost Let April 16, 2013 Winning bid $1.3 Million Bridge unit cost - $112/SF Historic bridge unit cost - $85/SF
  14. Critical closure schedule
  15. Massena lateral bridge slide web site
  16. Construction progress
  17. acknowledgements Designer – Iowa DOT Constructability Review – Michael Baker Corporation ABC Peer Exchange – Utah DOT ABC Detail Testing – Iowa State University Construction Administration – Iowa DOT Prime Contractor – Herberger Construction Co., Inc. Precast Wing Supplier – Cretex Concrete Products Precast Beam Supplier – Cretex Concrete Products HfL Grant – FHWA
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