US Bridges

Military Crossing over Williamson River

Good

Klamath County, Oregon · 092 MI E of HWY 97 · Structure no. 35C163067700920

Built
1962
63 years old, rebuilt 2007
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
47 ft
2 main spans
Daily traffic
38
2020 count
Owner
County
County Highway Agency

About this bridge

Military Crossing over Williamson River is a wood or timber stringer/multi-beam or girder carrying Military Crossing over Williamson River in Klamath County, Oregon. It was built in 1962 and reconstructed in 2007, so it is 63 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 38 vehicles a day, projected to reach 42 by 2025. The structure is 47 ft (14.3 m) long and 24 ft wide. If it were closed, the detour would be 13.7 mi (22 km).

CarriesMilitary Crossing
CrossesWilliamson River
Location092 MI E of HWY 97
RouteCounty Highway C0677
StateOregon
Coordinates42.95339, -121.67402
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.4 US tons
Inventory rating27.1 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadHS 20
Structure length47 ft (14.3 m)
Longest span23 ft (7 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic38 (2020)
Projected traffic42 by 2025
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13.7 mi (22 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Military Crossing over Williamson River built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 2007.

What condition is Military Crossing over Williamson River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does Military Crossing over Williamson River carry?

About 38 vehicles per day (2020 count).

How long is Military Crossing over Williamson River?

The structure is 47 ft (14.3 m) long with a longest span of 23 ft (7 m) and a deck 24 ft wide.

Who owns Military Crossing over Williamson River?

It is owned by the County Highway Agency.