US Bridges

SR 261 over Dry Run

Good

Adams County, Washington · 11.8 N JCT SR 26 · Structure no. 0003308D0000000

Built
1947
78 years old
Condition
Good
inspected October 2024
Type
Slab
Concrete
Length
27 ft
1 main span
Daily traffic
456
2023 count
Owner
State
State Highway Agency

About this bridge

SR 261 over Dry Run is a concrete slab carrying SR 261 over Dry Run in Adams County, Washington. It was built in 1947, so it is 78 years old, older 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 456 vehicles a day, roughly 25% of them trucks, projected to reach 511 by 2039. The structure is 27 ft (8.2 m) long and 30 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

CarriesSR 261
CrossesDry Run
Location11.8 N JCT SR 26
RouteState Highway 261
Coordinates46.90979, -118.33291
Functional classRural Major Collector

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 protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 alignment8: Equal to present desirable criteria
Operating rating37.8 US tons
Inventory rating29.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length27 ft (8.2 m)
Longest span24 ft (7.3 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic456 (2023)
Projected traffic511 by 2039
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$359,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 261 over Dry Run built?

It was built in 1947, making it 78 years old in 2025.

What condition is SR 261 over Dry Run 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 October 2024.

How much traffic does SR 261 over Dry Run carry?

About 456 vehicles per day (2023 count), of which roughly 25% are trucks.

How long is SR 261 over Dry Run?

The structure is 27 ft (8.2 m) long with a longest span of 24 ft (7.3 m) and a deck 30 ft wide.

Who owns SR 261 over Dry Run?

It is owned by the State Highway Agency.