Oregon/Jackson Street Bridge Study overview - Oshkosh, Winnebago County

​Note: This study is currently on hold. WisDOT bridge engineers determined the bridge is safe and structurally sound, and there are no significant safety concerns for the traveling public. WisDOT will conduct targeted maintenance actives to utilize the remaining service life in the structure until a more costly bridge improvement project is necessary.

Project location

Oregon/Jackson Street Bridge crosses the Fox River in downtown Oshkosh, Winnebago County.

 

View aerial location in pdf

View regional location in pdf

Project overview

The existing bridge was constructed in 1956 and is nearing its service life.  While the bridge is still safe for all travel, a recent investigation of the bridge has identified a number of issues that need to be addressed.  WisDOT is leading an environmental study that is investigating a wide range of improvement alternatives including:

  • A no-build alternative
  • Rehabilitating the existing bridge 
  • Replacing the bridge on the existing location 
  • Replacing the bridge on a new location

You can view all alternatives currently under study at the alternatives and maps page.

Status/phase

  • Current project/study on hold. Environmental study expected to resume in early 2021.
  • Construction 2028
    • WisDOT  will conduct targeted maintenance activities on the existing bridge from 2018 to 2028. Maintaining the bridge will utilize the structures additional service life while still allowing for potential reconstruction/replacement well within the timeframe when more costly repairs are anticipated.   

Need/purpose  

The purpose of the project is to continue providing a safe, reliable crossing for Oregon/Jackson Street over the Fox River.  Any bridge improvement will address structural and geometric deficiencies of the existing bridge, maintain safe access and passage for all users including motorists, bicyclists, pedestrians, persons with disabilities, and waterway users, meet transportation demand, and comply as much as possible with all state, regional and local plans, including city redevelopment planning.

Current bridge deficiencies

WisDOT bridge engineers determined the bridge is safe and structurally sound, and there are no significant safety concerns to traveling public that would necessitate a high-cost improvement project at this time. While scheduled and preventative maintenance will allow WisDOT to utilize the remaining service life of the existing bridge, there are deficiencies that have been grouped into three general areas (deficiencies, operations, safety). These deficiencies do not compromise safety of the traveling public and many of he deficiencies can be addressed with maintenance operations until a reconstruction/rehabilitation/replacement project is scheduled in 2028.

Bridge deficiencies

  • Movable bridge machinery shows signs of wear and corrosion and needs replacement
  • Deterioration of tack welds and steel plates require repair
  • Cracking and spalling on concrete surfaces of bridge piers
  • Sidewalks are less than the standard widths
  • Approach spans and sidewalks need repair
  • Vertical profiles of roadway approaches are below current design standards

Bridge operations

  • Bridge tender has poor visibility to monitor vehicles and pedestrians when raising the bridge
  • Low vertical clearance – Bridge had 400 more openings in 2015 than adjacent bridges

Safety

  • Vehicle crash rate is above statewide average for similar roadways
  • Bridge railing of bascule span is offset into sidewalk, creating potential hazards for pedestrians and bicyclists
  • Narrow lane and sidewalk widths do not provide safe bicycle accommodations
  • Riverwalk pedestrians and bicycle traffic are required to cross road at grade (cannot cross under bridge), creating a mid-block, at-grade pedestrian crossing
  • Steel grid panels in deck are offset and present a hazard to bicyclists
  • Approach sidewalks have settled and present a tripping hazard

Benefits of replacement or rehabilitation improvement alternatives

Any bridge replacement option has the following benefits:

  • Improved safety – A desirable width and profile that should improve safety for all users.
    • Replacement options increase the bridge width to accommodate 11-foot travel lanes as well as 5-foot bicycle lanes and 6-foot sidewalks on both sides.  
  • Improved traffic flow/boat passage – Allows for the potential to improve navigation clearance for boaters.
    • Current navigation clearance is 2-3’ less than adjacent bridges. An improved navigation clearance results in less delay for boaters and less traffic congestion in the downtown area from bridge openings.
  • Improved multi-modal opportunities - Better accommodations for bicycle and pedestrian travel and links to the river walks on both shores, including the potential to separate the river walks under a new bridge.   
  • Less future impact – Provides a bridge life of roughly 75 years before the next major bridge improvement is required.
    • Under a rehabilitation scenario, a complete replacement could be postponed for approximately 25-30 years, but replacement will still be required at that point.

A bridge rehabilitation option has the following benefits:

  • Cost – Based on initial study estimates, a rehabilitation option addresses the bridge structural deficiencies at a lower initial cost than the replacement options.  
  • Real Estate – A rehabilitation option requires less real estate than any replacement option that involves a new alignment or a raised profile.

Contacts

Bill Bertrand, WisDOT Project Manager
(920) 360-3124
william.bertrand@dot.wi.gov

Charles Karow, WisDOT Project Supervisor
(920) 492-5997
charles.karow@dot.wi.gov

Mark Kantola, WisDOT Northeast Region Communications Manager
(920) 492-4153
mark.kantola@dot.wi.gov

Wisconsin Department of Transportation (WisDOT)
Northeast Region
944 Vanderperren Way
Green Bay, WI 54304
Phone: (920) 492-5643
Fax: (920) 492-5640
TTY: 711
Email: ner.dtsd@dot.wi.gov