Rating:
2 votes

Tioga Bridge

Photos 

Tioga Bridge

Photo taken by Mike Goff in October 2013

Enlarge

BH Photo #271617

Map 

Street View 

Description 

Under normal circumstances the Tioga Bridge normally would not qualify for recognition as a historic or notable bridge in Oregon. However, the unique story surrounding the crossing justifies inclusion in the inventory.

Prior to the massive 1964 flood an arched timber truss bridge spanned the emerald colored waters of the North Umpqua River approximately 20 miles east of Roseburg off Oregon Highway 138. The previous bridge was known locally as the Young’s Bay Bridge due to its association with the Young’s Bay Lumber Company.

The 1964 Christmas Flood destroyed many structures throughout Oregon including the old Young’s Bay Bridge. Though the bridge itself was destroyed the piers of the old bridge survived the flood and stood alone in the river as a reminder of the floods power for the next 48 years.

The Bureau of Land Management began conceptual planning for a pedestrian bridge to be placed at the location of the Young’s Bay Bridge nearly 20 years prior to the construction of the new Tioga Bridge. The bridge would serve as a connection from Highway 138 to the 79-mile long North Umpqua Trail. The new connection would open up additional access to the trail by splitting the nearly 16-mile long Tioga Segment of the trail into two manageable day hike segments.

The new Tioga Bridge was to be placed on the remaining piers of the old structure in order to minimize impacts on the river as well as serve as a cost effective measure for building the new structure. BLM and ODOT engineers undertook the design of the project, while Western Wood Structures Inc. of Tualatin, Oregon completed the design of the main arch span. Weekly Brothers Inc. of nearby Idleyld Park was contracted to construct the new bridge, realign a small stretch of Highway 138 as well as add additional trail facilities to the bridge. The new bridge was completed in early 2013 with the formal ribbon cutting occurring on May 17th.

The new bridge consists of a single 137-foot timber glu-lam tied arch main span flanked by two 70-foot timber glu-lam girder approach spans. The Tioga Bridge is reminiscent of the original Young’s Bay Bridge, but with a modern rustic flare.

Facts 

Overview
Timber through arch bridge over North Umpqua River on North Umpqua Trail Connector
Location
Douglas County, Oregon
Status
Open to pedestrians only
History
Built 2012
Builders
- Paul C. Gilham (Arch Span Designer)
- Robert E. Grubbs (Lead Bridge Designer)
- Seneca Jones Timber Co. of Eugene, Oregon (Lumberer)
- Weekly Brothers Inc. of Idleyld Park, Oregon (Contractor)
- Western Wood Structures of Tualatin, Oregon (Arch Fabricator)
Design
70.0' - Timber girder approach span.
137.6' - Glu-lam timber tied arch main span.
70.0' - Timber glu-lam girder approach span.
Dimensions
Length of largest span: 137.0 ft.
Total length: 276.6 ft.
Deck width: 10.0 ft.
Approximate latitude, longitude
+43.29575, -122.91809   (decimal degrees)
43°17'45" N, 122°55'05" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/506643/4793661 (zone/easting/northing)
Quadrangle map:
Old Fairview
Inventory number
BH 58956 (Bridgehunter.com ID)

Update Log 

  • May 25, 2017: New photos from Mike Garland
  • September 12, 2014: Updated by Luke: Added category "Seneca Jones Timber Co."
  • December 9, 2013: Added by Mike Goff

Sources 

  • Mike Goff - michael [dot] goff [at] hotmail [dot] com
  • Tigoa Bridge - BLM Webpage
  • Tioga Bridge Project - KPIC News Report on the Tioga Bridge
  • Mike Garland - Rapier342 [at] comcast [dot] net

Comments 

Tioga Bridge
Posted December 14, 2013, by Zachary S

Wow. That's one of the nicest and most aesthetically-pleasing modern bridges you're ever gonna see!

RE: Tioga Bridge
Posted December 13, 2013, by Mike Goff (michael [dot] goff [at] hotmail [dot] com)

Thank you Tony. I went back and forth on whether or not to add this bridge. I didn’t want to water down the quality of the structures on the site with a modern pedestrian structure. However, I finally decided that the full circle bridge story was worth telling.

Tioga Bridge
Posted December 12, 2013, by Tony Dillon (spansaver [at] hotmail [dot] com)

This is certainly the type of modern bridge addition that I like. The history of the old bridge and the recreation of a modern facsimile is really pretty cool!