US Bridges

Jacobson Road over Drainage Ditch

Good

Pacific County, Washington · 2.5 S Grays Har CO · Structure no. 083909000000000

Built
1990
35 years old
Condition
Good
inspected June 2024
Type
Slab
Prestressed Concrete
Length
26 ft
1 main span
Daily traffic
48
2023 count
Owner
County
County Highway Agency

About this bridge

Jacobson Road over Drainage Ditch is a prestressed concrete slab carrying Jacobson Road over Drainage Ditch in Pacific County, Washington. It was built in 1990, so it is 35 years old, younger than the Washington average of 49.8 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 48 vehicles a day, roughly 10% of them trucks, projected to reach 110 by 2043. The structure is 26 ft (7.9 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesJacobson Road
CrossesDrainage Ditch
Location2.5 S Grays Har CO
RouteCounty Highway 51320
Coordinates46.758, -124.07803
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span24 ft (7.2 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48 (2023)
Projected traffic110 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$272,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Jacobson Road over Drainage Ditch built?

It was built in 1990, making it 35 years old in 2025.

What condition is Jacobson Road over Drainage Ditch 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 June 2024.

How much traffic does Jacobson Road over Drainage Ditch carry?

About 48 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Jacobson Road over Drainage Ditch?

The structure is 26 ft (7.9 m) long with a longest span of 24 ft (7.2 m) and a deck 27 ft wide.

Who owns Jacobson Road over Drainage Ditch?

It is owned by the County Highway Agency.