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Belknap Covered Bridge 37-20-11

Photos 

Belknap Covered Bridge

Photo taken by Michael Goff on June 4, 2010

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BH Photo #167224

Map 

Description 

The Belknap Bridge occupies a site in which a covered bridge has been in continuous use since 1890. The neighboring community recognized the importance of a river crossing at that location and adopted the name "McKenzie Bridge." In 1911 the first bridge was replaced by Lane County with another covered structure. The third covered bridge at this site was erected in 1939 and was destroyed by the Christmas Flood of 1964. The current covered span was designed by Oregon Bridge Corporation of Springfield and built by contract let by the county. The bridge was opened in 1966.

Several years later, louvered windows were added to the bridge to give interior illumination and to reduce the "box effect" of the windowless span. Extensive repairs in 1992 and 2002 strengthened the structure, and a new roof was installed.

(Reference: Roofs Over Rivers, by Bill and Nick Cockrell)

Facts 

Overview
Covered Howe through truss bridge over Mckenzie River on King Road West
Location
Lane County, Oregon
Status
Open to traffic
History
Built 1966; rehabilitated 1992
Design
Covered Howe Through truss
Dimensions
Length of largest span: 134.8 ft.
Total length: 181.1 ft.
Deck width: 21.0 ft.
Vertical clearance above deck: 15.7 ft.
Recognition
Posted to the National Register of Historic Places on November 29, 1979
Also called
McKenzie Bridge
Approximate latitude, longitude
+44.16778, -122.22806   (decimal degrees)
44°10'04" N, 122°13'41" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/561715/4890797 (zone/easting/northing)
Quadrangle map:
McKenzie Bridge
Inventory numbers
ORNBI 39C123111600001 (Oregon bridge number on the National Bridge Inventory)
NRHP 79002097 (National Register of Historic Places reference number)
BH 30039 (Bridgehunter.com ID)
Inspection (as of 07/2014)
Deck condition rating: Good (7 out of 9)
Superstructure condition rating: Poor (4 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 22.5 (out of 100)
Average daily traffic (as of 2010)
240

Update Log 

  • March 10, 2014: Updated by Dave King: Added NRHP info & imported photos
  • June 7, 2010: New photos from Michael Goff

Related Bridges 

Sources 

Comments 

Belknap Covered Bridge
Posted January 19, 2011, by Michael Goff (michael [dot] goff [at] odot [dot] state [dot] or [dot] us)

Will,

The waters in our region are beginning to recede. The northern half of the Oregon and Washington State were hit the hardest. A single bridge was partially washed out and a few hundred yards of roadway were completely washed out near Mt. Hood in the northern part of Oregon. I have not heard of any major damage from Washington at this point in time.

Our hydraulics engineer has developed a computer program that will trigger alerts for scour critical bridge during a pre-determined rain event. If a large rainfall occurs the program will tell us which bridges need to be more closely monitored based on the scour susceptibility of the bridge and calculated flows of the river. It is a pretty neat tool for flood events; it helps guide maintenance crews and inspectors when problems start occuring.

I am not sure how much freeboard the Belknap Bridge actually has during low water. The photo that I posted was during pretty highway, just not as much as the news article photo you shared. I can tell you that the approach alignments at the Belknap site would limit any raising of the structure, so I would imagine it is not built to high water standards.

Mike

Belknap Covered Bridge
Posted January 19, 2011, by Will (Bridgewright [at] gmail [dot] com)

Mike - Is your areas highwater receding yet? Post flood inspections in the offing? Scour seems probable for some of your inventory.

How high is the Belknap off the water at normal levels? I noticed one of your photos does not show much more freeboard than this flood photo shot two days ago http://tiny.cc/e9dz2 Seems a bit unusual for a late 20th century bridge.