US Bridges

Tampico Road over Soap Creek

Fair

Benton County, Oregon · 0066 MI W of Soap CR RD · Structure no. 03C12 000

Built
1956
69 years old, rebuilt 1991
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
38 ft
2 main spans
Daily traffic
172
2020 count
Owner
County
County Highway Agency

About this bridge

Tampico Road over Soap Creek is a wood or timber stringer/multi-beam or girder carrying Tampico Road over Soap Creek in Benton County, Oregon. It was built in 1956 and reconstructed in 1991, so it is 69 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 172 vehicles a day, roughly 10% of them trucks, projected to reach 234 by 2040. The structure is 38 ft (11.6 m) long and 26 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesTampico Road
CrossesSoap Creek
Location0066 MI W of Soap CR RD
RouteCounty Highway 0
CountyBenton County
StateOregon
Coordinates44.69254, -123.2485
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.5 US tons
Inventory rating28.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadUnknown
Structure length38 ft (11.6 m)
Longest span18 ft (5.5 m)
Deck width26 ft (8 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic172 (2020)
Projected traffic234 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Tampico Road over Soap Creek built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1991.

What condition is Tampico Road over Soap Creek 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 Tampico Road over Soap Creek carry?

About 172 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Tampico Road over Soap Creek?

The structure is 38 ft (11.6 m) long with a longest span of 18 ft (5.5 m) and a deck 26 ft wide.

Who owns Tampico Road over Soap Creek?

It is owned by the County Highway Agency.