US Bridges

Benson CR RD over Drain Ditch

Fair

Coos County, Oregon · 0133 Mile So RD 186ON187 · Structure no. 18850 018700133

Built
2002
23 years old
Condition
Fair
inspected September 2024
Type
Slab
Prestressed Concrete
Length
33 ft
1 main span
Daily traffic
15
2020 count
Owner
County
County Highway Agency

About this bridge

Benson CR RD over Drain Ditch is a prestressed concrete slab carrying Benson CR RD over Drain Ditch in Coos County, Oregon. It was built in 2002, so it is 23 years old, younger 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 15 vehicles a day, roughly 1% of them trucks, projected to reach 15 by 2025. The structure is 33 ft (10.2 m) long and 24 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesBenson CR RD
CrossesDrain Ditch
Location0133 Mile So RD 186ON187
RouteCounty Highway C187G
StateOregon
Coordinates43.56896, -124.09559
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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 alignment6: Equal to present minimum criteria
Operating rating50.4 US tons
Inventory rating38.9 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHL 93
Structure length33 ft (10.2 m)
Longest span32 ft (9.9 m)
Deck width24 ft (7.3 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2020)
Projected traffic15 by 2025
Trucks1%
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 Benson CR RD over Drain Ditch built?

It was built in 2002, making it 23 years old in 2025.

What condition is Benson CR RD over Drain Ditch 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 September 2024.

How much traffic does Benson CR RD over Drain Ditch carry?

About 15 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Benson CR RD over Drain Ditch?

The structure is 33 ft (10.2 m) long with a longest span of 32 ft (9.9 m) and a deck 24 ft wide.

Who owns Benson CR RD over Drain Ditch?

It is owned by the County Highway Agency.