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2007 - I-215 / 4500 South Bridge

  • Year ABC Built: 2007
  • State: Utah
  • Owner: State
  • Location: Urban
  • Spans: One-span
  • Beam Material: Concrete
  • Max Span Length (ft.): 172.00
  • Total Bridge Length (ft.): 172.00
  • Construction Equipment: SPMTs
  • State ID #: F-I215(126)13
  • NBI #: 0C 953
  • Coordinates:     Latitude: 40.6741676, Longitude: -111.8024979
  • Bridge Description

  • Project Summary:
  • Project Location: 4500 South (SR-266) over I-215 in Salt Lake City
  • Mobility Impact Time: ABC: weekend closure of I-215 (53 hours) 10-day closure of 4500 South ; Conventional: 40-50 weeks of construction-related congestion
  • Impact Category: Tier 2 (within 3 days)
  • Primary Drivers:

    reduced onsite construction time; reduced traffic impacts; improved work-zone safety; improved site constructability; improved material quality and product durability

  • Dimensions: 172-ft long and 82-ft wide single-span bridge roll-in; 1,600-ton self-weight
  • Average Daily Traffic (at time of construction): 66000
  • Traffic Management: Traffic management alternative, if constructed conventionally: extended detour
  • Existing Bridge Description: Four-span bridge (F-156) 244-ft-long and 77.2-ft-wide. Built in 1971, it had a deteriorated superstructure and substructure that required replacement in 2007.
  • Replacement or New Bridge:
  • Construction Method: The replacement superstructure was built near site on temporary supports while the replacement abutments were built below the existing bridge with I-215 traffic maintained. The abutments were built on cast-in-place spread footing foundations with full-height cast-in-place wingwalls while 4500 South traffic remained operational. Free-draining backfill was used to minimize needed compaction behind the abutments. The free-draining backfill used a prescriptive compaction method with a vibratory roller; no compaction tests were required. Friday EveningI-215 and the 4500 South bridges were closed.Saturday The two existing spans crossing I-215 were removed in seven hours with self-propelled modular transporters (SPMTs), while the two smaller existing end spans and substructures were demolished conventionally. SundaySPMTs moved the replacement superstructure into place. The removal and replacement took 53 hours over a weekend; the move would have taken less time but was delayed to allow for daylight observance of the move by showcase participants. Monday morning 3 a.m.I-215 was reopened to traffic with the 4500 South Bridge reopened 10 days later. Precast approach slabs helped speed the bridge reopening.
  • Stakeholder Feedback:

    Construction Manager General Contractor (CMGC) was critical to making this project successful in the extremely short amount of planning and construction time allotted. Use of CMGC allowed the contractor and designer to work in a collaborative manner at the early part of the planning stage to seek improved constructability solutions.

  • High Performance Material: Lightweight concrete deck
  • Project Planning

  • Decision Making Tools: State process
  • Site Procurement: (none)
  • Project Delivery: CMGC
  • Contracting: Full lane closure
  • Geotechnical Solutions

  • Foundations & Walls: CIP substructure under traffic
  • Rapid Embankment: Self-compacting backfill
  • Structural Solutions

  • Prefabricated Bridge Elements: (none)
  • Prefabricated Bridge Systems: FDcBs (full-width concrete-decked steel beam unit)
  • Miscellaneous Prefabricated: Precast approach slab; LWC deck
  • ABC Construction Equipment: SPMT(s)
  • Cost & Funding

  • Costs: The project cost was approximately $7.0 million which includes $2.5 million associated ABC costs. The SPMT cost was approximately $800,000 with the additional money for temporary soil nail walls, grading of the staging area, temporary abutments, temporary abutment containers, permanent abutment configuration, and additional labor. The use of ABC saved $4.0 million in user costs.
  • Funding Source: Federal and State
  • Incentive Program: HfL (Highways for LIFE): $1,000,000
  • Additional Information

Downloadable Resources

Contract Plans:
Specifications:
Bid Tabs:
Construction Schedule:
Other Related Information:
http://www.fhwa.dot.gov/hfl/summary/ut0409/
http://www.fhwa.dot.gov/publications/focus/07dec/01.cfm
http://www.udot.utah.gov

Photo Credits: Utah Department of Transportation

 

Contacts

Owner: Carmen Swanwick, P.E.
Chief Structural Engineer
Utah Department of Transportation
cswanwick@utah.gov
801-965-4981

Bridge Description Summary Sheet: