US Bridges

Twin Butte DR West over Spoon Creek

Fair

Linn County, Oregon · 009 E CR 515 · Structure no. 12478 051300092

Built
1971
54 years old
Condition
Fair
inspected May 2023
Type
Slab
Prestressed Concrete
Length
44 ft
2 main spans
Daily traffic
26
2021 count
Owner
County
County Highway Agency

About this bridge

Twin Butte DR West over Spoon Creek is a prestressed concrete slab carrying Twin Butte DR West over Spoon Creek in Linn County, Oregon. It was built in 1971, so it is 54 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 26 vehicles a day, projected to reach 52 by 2041. The structure is 44 ft (13.4 m) long and 24 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesTwin Butte DR West
CrossesSpoon Creek
Location009 E CR 515
RouteCounty Highway C0513
CountyLinn County
StateOregon
Coordinates44.34519, -123.06927
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
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 rating37.1 US tons
Inventory rating28.5 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans2
Design loadHS 20
Structure length44 ft (13.4 m)
Longest span21 ft (6.4 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2021)
Projected traffic52 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Twin Butte DR West over Spoon Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is Twin Butte DR West over Spoon 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 May 2023.

How much traffic does Twin Butte DR West over Spoon Creek carry?

About 26 vehicles per day (2021 count).

How long is Twin Butte DR West over Spoon Creek?

The structure is 44 ft (13.4 m) long with a longest span of 21 ft (6.4 m) and a deck 24 ft wide.

Who owns Twin Butte DR West over Spoon Creek?

It is owned by the County Highway Agency.