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Project Details

Caveman Bridge Rehabilitation

Construction Phase

Region 3: Southwestern Oregon (Grants Pass, Josephine)

​This project rehabilitates the landmark Caveman Bridge which first opened to traffic in 1931. Designed by famed bridge builder Conde McCullough, it’s in need of repair.


Traffic Impact

Traffic may be held for up to 20 min. during these night time single lane closures.

  • Sun.12 a.m. thru Mon. 7 a.m.
  • Mon. thru Thurs. – 7 p.m.- 7 a.m.
  • Thurs. 12 a.m. thru Friday 7 a.m.

No work, under the north end of bridge – 7:30 am to 9:00 pm May 1 thru Sept. 30, 2018 for Hellgate Jet Boat season

No work during the 2018 Boatnik Celebration, May 24 - 28, 2018

No work during Concerts in the Park - 6:30 – 9 p.m. Tuesdays, June 19 through Aug. 7, 2018

No lane closures during: Back to the 50s Cruise and Josephine Co. Fair


Current Schedule- week of Jan. 5-12, 2018:

Sunday through Thursday night, 7 p.m. - 7 a.m. Expect single lane traffic as contractor is working top side cutting bridge rail and or installing new rail.

Work continues daytime under the bridge with crack injection and otherwise repairing concrete.

Overall Schedule:

Sept. 2017 into Jan-February 2018

  • Mobilize in to work area, set signs, etc.
  • Install temporary work platform under bridge – it will be moved south to north three times as stages are complete includes single lane night time closures of two weeks
  • Begin concrete repairs – crack injection, titanium reinforcement, bridge jacking, clean and lubricate bearings, seismic retrofit, and pressure wash structure.

Spring 2018-February 2019 (night time traffic closures at this time)

  • Work on top of deck
    • Saw cutting ornamental rail and replace with new rail
    • Work will consist of setting up access outside of bridge overhang, drill for resin bonding anchors, install pre-cast ornamental railing and closing pours.
  • Perform concrete repairs, crack injection, pressure washing
    • CFRP (carbon fiber reinforced polymers)
    • Sidewalk repairs and overlay
    • Install compression joints
  • Remove asphalt
    • Refurbish existing concrete lighting and install new bridge lighting and conduit (8 total)
    • New concrete overlay of bridge deck​



This project rehabilitates the 550 foot-long Caveman Bridge, bringing it back to its Depression era beauty. It repairs the cracked, broken concrete and exposed rebar, failed joints and delamination of the bridge deck. It provides for a Phase I Seismic retrofit of the structure.​


OR 99 | ​Grants Pass, Oregon 99-Caveman Bridge

Cost and Funding

​Overall budget - $5.3 million  


​HP Civil, Stayton OR

Maps & Media


Video Link

Image Gallery

Project Contact

Public Information Officer
Gary Leaming

Last Updated

3/5/2018 9:31 AM

Project Number


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