US Bridges

Garden Street over Drainage Ditch

Good

Walla Walla County, Washington · 00.30N SR 12 · Structure no. 081187000000000

Built
1988
37 years old
Condition
Good
inspected September 2024
Type
Slab
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
79
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Garden Street over Drainage Ditch is a concrete continuous slab carrying Garden Street over Drainage Ditch in Walla Walla County, Washington. It was built in 1988, so it is 37 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 79 vehicles a day, projected to reach 152 by 2046. The structure is 25 ft (7.5 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesGarden Street
CrossesDrainage Ditch
Location00.30N SR 12
RouteCity Street 69190
Coordinates46.275, -118.14833
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length25 ft (7.5 m)
Longest span12 ft (3.6 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic79 (2024)
Projected traffic152 by 2046
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Garden Street over Drainage Ditch built?

It was built in 1988, making it 37 years old in 2025.

What condition is Garden Street 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 September 2024.

How much traffic does Garden Street over Drainage Ditch carry?

About 79 vehicles per day (2024 count).

How long is Garden Street over Drainage Ditch?

The structure is 25 ft (7.5 m) long with a longest span of 12 ft (3.6 m) and a deck 35 ft wide.

Who owns Garden Street over Drainage Ditch?

It is owned by the City or Municipal Highway Agency.