US Bridges

Yaquina Bay RD over Depot Slough

Fair

Lincoln County, Oregon · 001 M West of Toledo · Structure no. 12131A515041235

Built
1962
63 years old
Condition
Fair
inspected September 2024
Type
Slab
Prestressed Concrete
Length
330 ft
10 main spans
Daily traffic
2,122
2020 count
Owner
County
County Highway Agency

About this bridge

Yaquina Bay RD over Depot Slough is a prestressed concrete slab carrying Yaquina Bay RD over Depot Slough in Lincoln 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 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 2,122 vehicles a day, roughly 20% of them trucks, projected to reach 2,652 by 2040. The structure is 330 ft (100.6 m) long and 33 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesYaquina Bay RD
CrossesDepot Slough
Location001 M West of Toledo
RouteCounty Highway 0
CountyLincoln County
StateOregon
Coordinates44.62203, -123.94577
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.6 US tons
Inventory rating52.9 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans10
Design loadHS 20
Structure length330 ft (100.6 m)
Longest span35 ft (10.7 m)
Deck width33 ft (10.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,122 (2020)
Projected traffic2,652 by 2040
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed24.9 mi (40 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.7 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Yaquina Bay RD over Depot Slough built?

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

What condition is Yaquina Bay RD over Depot Slough 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 Yaquina Bay RD over Depot Slough carry?

About 2,122 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Yaquina Bay RD over Depot Slough?

The structure is 330 ft (100.6 m) long with a longest span of 35 ft (10.7 m) and a deck 33 ft wide.

Who owns Yaquina Bay RD over Depot Slough?

It is owned by the County Highway Agency.