US Bridges

Trout Creek RD over Trout Creek

Good

Skamania County, Washington · MP 0.55 Trout Creek Road · Structure no. 083481000000000

Built
1972
53 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
144 ft
3 main spans
Daily traffic
205
2023 count
Owner
County
County Highway Agency

About this bridge

Trout Creek RD over Trout Creek is a prestressed concrete stringer/multi-beam or girder carrying Trout Creek RD over Trout Creek in Skamania County, Washington. It was built in 1972, so it is 53 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 205 vehicles a day, roughly 22% of them trucks, projected to reach 225 by 2039. The structure is 144 ft (43.9 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesTrout Creek RD
CrossesTrout Creek
LocationMP 0.55 Trout Creek Road
RouteCounty Highway 22700
Coordinates45.8, -121.91333
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating23.6 US tons
Inventory rating18.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length144 ft (43.9 m)
Longest span80 ft (24.4 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic205 (2023)
Projected traffic225 by 2039
Trucks22%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$5.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Trout Creek RD over Trout Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is Trout Creek RD over Trout Creek 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 July 2023.

How much traffic does Trout Creek RD over Trout Creek carry?

About 205 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is Trout Creek RD over Trout Creek?

The structure is 144 ft (43.9 m) long with a longest span of 80 ft (24.4 m) and a deck 31 ft wide.

Who owns Trout Creek RD over Trout Creek?

It is owned by the County Highway Agency.