US Bridges

Letz CR RD over Siuslaw River

Good

Lane County, Oregon · 040 MI W of Lorane · Structure no. 39C456439200001

Built
1983
42 years old
Condition
Good
inspected July 2024
Type
Tee Beam
Prestressed Concrete
Length
197 ft
3 main spans
Daily traffic
112
2020 count
Owner
County
County Highway Agency

About this bridge

Letz CR RD over Siuslaw River is a prestressed concrete tee beam carrying Letz CR RD over Siuslaw River in Lane County, Oregon. It was built in 1983, so it is 42 years old, younger than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 112 vehicles a day, projected to reach 112 by 2025. The structure is 197 ft (60 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesLetz CR RD
CrossesSiuslaw River
Location040 MI W of Lorane
RouteCounty Highway C4392
StateOregon
Coordinates43.82268, -123.32244
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be 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 alignment8: Equal to present desirable criteria
Operating rating21.4 US tons
Inventory rating16.4 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans3
Design loadHS 20
Structure length197 ft (60 m)
Longest span75 ft (22.9 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic112 (2020)
Projected traffic112 by 2025
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Letz CR RD over Siuslaw River built?

It was built in 1983, making it 42 years old in 2025.

What condition is Letz CR RD over Siuslaw River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does Letz CR RD over Siuslaw River carry?

About 112 vehicles per day (2020 count).

How long is Letz CR RD over Siuslaw River?

The structure is 197 ft (60 m) long with a longest span of 75 ft (22.9 m) and a deck 28 ft wide.

Who owns Letz CR RD over Siuslaw River?

It is owned by the County Highway Agency.