US Bridges

Lost Valley Road over Lost Valley Creek

Fair

Lewis County, Washington · 1.0 W Boistfort · Structure no. 081235000000000

Built
1953
72 years old
Condition
Fair
inspected December 2022
Type
Stringer/Multi-beam or Girder
Concrete
Length
30 ft
1 main span
Daily traffic
106
2022 count
Owner
County
County Highway Agency

About this bridge

Lost Valley Road over Lost Valley Creek is a concrete stringer/multi-beam or girder carrying Lost Valley Road over Lost Valley Creek in Lewis County, Washington. It was built in 1953, so it is 72 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 106 vehicles a day, roughly 29% of them trucks, projected to reach 192 by 2042. The structure is 30 ft (9.1 m) long and 22 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesLost Valley Road
CrossesLost Valley Creek
Location1.0 W Boistfort
RouteCounty Highway 25401
CountyLewis County
StateWashington
Coordinates46.54623, -123.15102
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating29 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span27 ft (8.2 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic106 (2022)
Projected traffic192 by 2042
Trucks29%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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$342,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Lost Valley Road over Lost Valley Creek built?

It was built in 1953, making it 72 years old in 2025.

What condition is Lost Valley Road over Lost Valley Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2022.

How much traffic does Lost Valley Road over Lost Valley Creek carry?

About 106 vehicles per day (2022 count), of which roughly 29% are trucks.

How long is Lost Valley Road over Lost Valley Creek?

The structure is 30 ft (9.1 m) long with a longest span of 27 ft (8.2 m) and a deck 22 ft wide.

Who owns Lost Valley Road over Lost Valley Creek?

It is owned by the County Highway Agency.