Slide-In Bridge Construction Implementation Guide 
Federal Highway Administration 
A-3 
US-34 over Republican River, Bridge Replacement 
Construction Year: 
2012 
Owner: 
CDOT 
Contractor: 
Lawrence Construction Company 
Designer: 
Tsiouvaras Simmons Holderness (TSH) 
Contracting Method: 
Design-Bid-Build (DBB) (A + B Time Format) 
SIBC Construction Type: Rollers with hydraulic jacks 
Project Details 
The project replaced a four-span bridge with a single span bridge carrying US-34 over the 
Republican River near Wray, Colorado.  The bridge site had significant constraints, including an 
adjacent railroad to the north and irrigation structures to the south.  A construction detour would 
have required a 70-mile long detour through Kansas and Nebraska.  To solve these challenges, 
a solution was developed to construct the bridge superstructure adjacent to the existing bridge 
and directly above the irrigation structures.  The abutments were constructed in place inside 
concrete vaults that allowed traffic to pass overhead during all construction activities except the 
caisson drilling.  The bridge was then rolled into place during a short roadway closure.  Details 
of the rolling operation were coordinated with contractors, material suppliers, and heavy lifting 
experts.  Project documents were produced in A + B format to encourage the contractor to 
minimize the construction schedule.  
The final construction closure of US-34 was limited to three days with the roll in of the bridge 
taking 90 minutes.  The bridge construction and roll in operation went smoothly.  The river 
hydraulics of the site required significant channel work that could only be constructed after the 
old bridge was removed and prior to the new bridge being rolled into its final location.  
Determining a faster construction method for the river work would have significantly reduced the 
required closure time.  A video of the US-34 Bridge slide is at: 
http://www.youtube.com/watch?v=z5EaZjQ7nw.  
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Federal Highway Administration 
Slide-In Bridge Construction Implementation Guide 
A-4 
I-80; Summit Park Bridges, Utah 
Construction Year: 
2011 
Owner: 
UDOT 
Contractor: 
Ralph L. Wadsworth 
Designer: 
UDOT and Michael Baker Corp. 
Contracting Method: 
Construction Manager/General Contractor (CM/GC) 
SIBC Construction Type: Teflon pads and hydraulic jacks 
Project Details 
SIBC was used to replace eastbound and westbound three-span bridges over Aspen Drive near 
Summit Park with more efficient single-span bridges.  The Summit Park bridges span a busy 
commuter corridor between Park City and Salt Lake City, and the SIBC method resulted in 
fewer traffic interruptions and safer environment for both workers and commuters.  The wider, 
clear span permitted new wildlife to cross under the bridges and improved pedestrian mobility.  
The CM/GC delivery method allowed the contractor and designer to work together to develop 
the bridge design with all SIBC details fully developed.   
The new abutments were constructed under the existing bridges while they remained in service.  
Micropiles were used for the deep foundations, which allowed pile installation under the existing 
bridges.  The bridges were slid using Teflon pads with hydraulic push jacks on a track system.  
The  approach  slabs  were constructed  and  slid  into  place  with  the  bridge.   The  contractor 
completed the bridge slides overnight during the weekends (one night per bridge) to minimize 
traffic interruptions.  Additional nighttime lane closures were permitted for grinding and asphalt 
overlay of approximately 400 feet on either side of the bridge for roadway tie-ins.  
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Slide-In Bridge Construction Implementation Guide 
Federal Highway Administration 
A-5 
I-80; 2300 East Bridge, Utah 
Construction Year: 
2009 
Owner: 
UDOT 
Contractor: 
Ralph L. Wadsworth 
Designer: 
Michael Baker Corp. 
Contracting Method: 
Design-Build (DB) 
SIBC Construction Type: Teflon pads and hydraulic jacks 
Project Details 
This project required  the replacement of  the  existing  three-span  eastbound and westbound 
bridges over 2300 East on I-80.  The DB RFP outlined a closure time of 18 hours in each 
direction to completely remove and replace the new structures before restoring traffic to full 
service.  The contractor team developed an SIBC solution to meet this requirement, including 
sliding the approach slabs in with the new bridge.   
Each bridge was constructed adjacent to the existing bridge on elevated shoring towers while 
the substructure was constructed underneath the existing structures.  The westbound bridge 
was  constructed  four  feet  higher  than  its  final  position  to  provide  vertical  clearance  in  its 
temporary location.  It was lowered onto the sliding tracks to its final position prior to sliding.  
The existing bridge was partially demolished on a Friday night to allow one lane of traffic during 
Saturday while the new bridge was partially slid into place.  The contractor then slid the new 
bridge completely into place in less than eight hours during the full closures on Saturday night 
and opened to all lanes of traffic on Sunday.  The existing pavement was PCCP, so a minimum 
amount of PCCP was removed to install the bridge with asphalt ‘plugs’ placed between the 
PCCP and sleeper  slab.   This short tie-in  length created a  challenge to  provide a  smooth 
roadway to bridge transition between two rigid elements.  A video of the 2300 East Bridge move 
is located at: http://www.youtube.com/watch?v=IMDIMdAKHcs.  
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Appendix B:   
Additional References 
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Slide-In Bridge Construction Implementation Guide 
Federal Highway Administration 
B-1 
American Association of State Highway and Transportation Officials (AASHTO) 
(most recent)  Guide Design Specifications for Bridge Temporary Works 
American Association of State Highway and Transportation Officials (AASHTO) 
(most recent)  LRFD Bridge Construction Specifications 
American Association of State Highway and Transportation Officials (AASHTO) 
(most recent)  LRFD Bridge Design Specifications 
Federal Highway Administration (FHWA) 
2010-2012 
Every Day Counts Initiative. Retrieved from 
http://www.fhwa.dot.gov/everydaycounts/   
Occupational Safety and Health Administration [OSHA] 
1984-2010 
Bridge Construction Worker Injuries, Type 1622 
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Appendix C:   
Sample Plans
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