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2011 - I-15 / Sam White Lane Bridge

  • Year ABC Built: 2011
  • State: Utah
  • Owner: State
  • Location: Urban
  • Spans: Two-span
  • Beam Material: Steel
  • Max Span Length (ft.): 177.00
  • Total Bridge Length (ft.): 354.00
  • Construction Equipment: SPMTs
  • State ID #: MP-l15-6(178)245
  • NBI #: 0C 989
  • Coordinates:     Latitude: 40.355545, Longitude: -111.7773666
  • Bridge Description

  • Project Summary:
  • Project Location: On Sam White Lane over I-15 in the city of American Fork in Utah County, 30 miles south of Salt Lake City
  • Mobility Impact Time: ABC: overnight closure of I-15 (8 hrs); Conventional: Six additional full nighttime I-15 closures
  • Impact Category: Tier 1 (within 1 day)
  • Primary Drivers:

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

  • Dimensions: 354-ft long and 76.8-ft wide two-span continuous steel plate-girder bridge (177 ft – 177 ft) roll-in; 48º skew; 1,910-ton self-weight
  • Average Daily Traffic (at time of construction): 65800
  • Traffic Management: Traffic management alternative, if constructed conventionally: would have impacted I-15 traffic (extended use of multiple lane closures)
  • Existing Bridge Description: The existing four-span bridge was 325 ft long and 34 ft wide with a minimum vertical clearance of 14 ft-7 inch. It was demolished in 2008 after being severely damaged by a collision.
  • Replacement or New Bridge: The Sam White Bridge is the longest bridge in the US to be moved into its final location using self-propelled modular transporters (SPMTs). It crosses I-15 at a high skew and on a sharp vertical curve. The bridge has two 12-ft-wide traffic lanes in each direction, a 14-ft-wide turn lane, and a 12-ft-wide shoulder and 6-ft-wide sidewalk on each side. The 7-ft-deep cross-section consists of six steel plate girders at 13.5-ft spacing with 4.67-ft overhangs and a 10-inch-thick cast-in-place lightweight concrete deck. It has a 17.25-ft vertical clearance above I-15.
  • Construction Method: From August 2010 to March 2011, the bridge was built on the east side of I-15 approximately 500 ft from the bridge location. The abutments and interior support were constructed conventionally with concrete-filled pipe pile foundations. The interior support consists of six individual 4-ft-square cast-in-place concrete columns spaced at 20 ft. Each girder was set directly on a column. Each girder was connected to the column with an over-sized interlocking sole plate on a steel-reinforced elastomeric bearing pad; the connection accommodated setting tolerances during the bridge move as well as subsequent loading due to girder rotation and movements due to temperature and seismic effects. Saturday EveningOn March 26, I-15 was closed at 11 pm. At the bridge temporary location the two-span unit was lifted off the temporary supports on four lines of self-propelled modular transporters (SPMTs) (two lines per span), and moved 500 ft across eight lanes of I-15 to the final bridge location.Sunday MorningThe bridge was set in place at approximately 4 am. I-15 was re-opened at 7 am, three hours ahead of schedule. The abutments were made integral after the move, and a thin-bonded polymer overlay was placed.
  • Stakeholder Feedback: (none)
  • High Performance Material: Lightweight concrete deck, 70 ksi high performance steel (HPS) in girder flanges over the interior support
  • Project Planning

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

  • Foundations & Walls: (none)
  • Rapid Embankment: (none)
  • Structural Solutions

  • Prefabricated Bridge Elements: (none)
  • Prefabricated Bridge Systems: FDcBs (full-width concrete-decked steel beam unit)
  • Miscellaneous Prefabricated: CIP reinforced concrete closure joints; Thin-bonded epoxy overlay; LWC deck
  • ABC Construction Equipment: SPMT(s)
  • Cost & Funding

  • Costs: This bridge is part of the $1.7 billion Utah County Corridor Expansion (CORE) design-build project. The construction cost of the bridge was $5.09 million. The estimated cost of accelerated techniques was approximately $1.75 million.
  • Funding Source: State Only
  • Incentive Program: (none)
  • Additional Information

Downloadable Resources

Specifications:
Construction Schedule:
Other Related Information:
http://www.i15core.utah.gov/bridge/
http://www.youtube.com/watch?v=6yAlAGnKxSY
http://www.youtube.com/watch?v=IqyZ1HT0yMA
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: