US Bridges

County RD 31 over Sutherlin Creek

Poor

Douglas County, Oregon · 1.0 MI S of Wilbur Store · Structure no. 19C147003100036

Built
1962
63 years old
Condition
Poor
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
160 ft
3 main spans
Daily traffic
857
2020 count
Owner
County
County Highway Agency

About this bridge

County RD 31 over Sutherlin Creek is a steel stringer/multi-beam or girder carrying County RD 31 over Sutherlin Creek in Douglas County, Oregon. It was built in 1962, 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 857 vehicles a day, roughly 5% of them trucks, projected to reach 967 by 2025. The structure is 160 ft (48.8 m) long and 26 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesCounty RD 31
CrossesSutherlin Creek
Location1.0 MI S of Wilbur Store
RouteCounty Highway C0031
StateOregon
Coordinates43.3166, -123.3511
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating38.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length160 ft (48.8 m)
Longest span59 ft (18 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic857 (2020)
Projected traffic967 by 2025
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 31 over Sutherlin Creek built?

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

What condition is County RD 31 over Sutherlin Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.

How much traffic does County RD 31 over Sutherlin Creek carry?

About 857 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is County RD 31 over Sutherlin Creek?

The structure is 160 ft (48.8 m) long with a longest span of 59 ft (18 m) and a deck 26 ft wide.

Who owns County RD 31 over Sutherlin Creek?

It is owned by the County Highway Agency.