US Bridges

Tum Tum RD over Tum Tum River

Fair

Benton County, Oregon · 004 S of Blodgett RD · Structure no. 14096A000

Built
1955
70 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Concrete Continuous
Length
153 ft
3 main spans
Daily traffic
193
2020 count
Owner
County
County Highway Agency

About this bridge

Tum Tum RD over Tum Tum River is a concrete continuous tee beam carrying Tum Tum RD over Tum Tum River in Benton County, Oregon. It was built in 1955, so it is 70 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 6 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 193 vehicles a day, roughly 25% of them trucks, projected to reach 274 by 2040. The structure is 153 ft (46.6 m) long and 31 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesTum Tum RD
CrossesTum Tum River
Location004 S of Blodgett RD
RouteCounty Highway 0
StateOregon
Coordinates44.58653, -123.52593
Functional classRural Minor Collector

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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 alignment6: Equal to present minimum criteria
Operating rating27.1 US tons
Inventory rating21.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length153 ft (46.6 m)
Longest span60 ft (18.3 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic193 (2020)
Projected traffic274 by 2040
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 Tum Tum RD over Tum Tum River built?

It was built in 1955, making it 70 years old in 2025.

What condition is Tum Tum RD over Tum Tum 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 2024.

How much traffic does Tum Tum RD over Tum Tum River carry?

About 193 vehicles per day (2020 count), of which roughly 25% are trucks.

How long is Tum Tum RD over Tum Tum River?

The structure is 153 ft (46.6 m) long with a longest span of 60 ft (18.3 m) and a deck 31 ft wide.

Who owns Tum Tum RD over Tum Tum River?

It is owned by the County Highway Agency.