US Bridges

Damon RD over Intermittent Stream

Good

Adams County, Washington · 01.76 MI N SR26 · Structure no. 079876000000000

Built
1959
66 years old
Condition
Good
inspected October 2024
Type
Slab
Concrete
Length
26 ft
2 main spans
Daily traffic
48
2018 count
Owner
County
County Highway Agency

About this bridge

Damon RD over Intermittent Stream is a concrete slab carrying Damon RD over Intermittent Stream in Adams County, Washington. It was built in 1959, so it is 66 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 48 vehicles a day, roughly 4% of them trucks, projected to reach 60 by 2039. The structure is 26 ft (7.9 m) long and 26 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesDamon RD
CrossesIntermittent Stream
Location01.76 MI N SR26
RouteCounty Highway 33664
Coordinates46.81879, -118.77227
Functional classRural Minor 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 protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating20 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length26 ft (7.9 m)
Longest span13 ft (3.9 m)
Deck width26 ft (7.9 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48 (2018)
Projected traffic60 by 2039
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Damon RD over Intermittent Stream built?

It was built in 1959, making it 66 years old in 2025.

What condition is Damon RD over Intermittent Stream 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 Damon RD over Intermittent Stream carry?

About 48 vehicles per day (2018 count), of which roughly 4% are trucks.

How long is Damon RD over Intermittent Stream?

The structure is 26 ft (7.9 m) long with a longest span of 13 ft (3.9 m) and a deck 26 ft wide.

Who owns Damon RD over Intermittent Stream?

It is owned by the County Highway Agency.