US Bridges

Pine Cone Drive over Williamson River

Fair

Klamath County, Oregon · 002 MI W of SPRR · Structure no. 35C176073900120

Built
1964
61 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
82 ft
4 main spans
Daily traffic
85
2020 count
Owner
County
County Highway Agency

About this bridge

Pine Cone Drive over Williamson River is a wood or timber stringer/multi-beam or girder carrying Pine Cone Drive over Williamson River in Klamath County, Oregon. It was built in 1964, so it is 61 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 85 vehicles a day, projected to reach 90 by 2025. The structure is 82 ft (25 m) long and 22 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesPine Cone Drive
CrossesWilliamson River
Location002 MI W of SPRR
RouteCounty Highway C0739
CountyKlamath County
StateOregon
Coordinates42.59408, -121.86108
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.4 US tons
Inventory rating24.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadH 15
Structure length82 ft (25 m)
Longest span33 ft (10.1 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic85 (2020)
Projected traffic90 by 2025
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Pine Cone Drive over Williamson River built?

It was built in 1964, making it 61 years old in 2025.

What condition is Pine Cone Drive over Williamson River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2023.

How much traffic does Pine Cone Drive over Williamson River carry?

About 85 vehicles per day (2020 count).

How long is Pine Cone Drive over Williamson River?

The structure is 82 ft (25 m) long with a longest span of 33 ft (10.1 m) and a deck 22 ft wide.

Who owns Pine Cone Drive over Williamson River?

It is owned by the County Highway Agency.