US Bridges

Henriot Road over Lacamas Creek

Good

Lewis County, Washington · 3.5 N Toledo · Structure no. 084850000000000

Built
1975
50 years old
Condition
Good
inspected January 2023
Type
Culvert
Steel
Length
32 ft
1 main span
Daily traffic
304
2022 count
Owner
County
County Highway Agency

About this bridge

Henriot Road over Lacamas Creek is a steel culvert carrying Henriot Road over Lacamas Creek in Lewis County, Washington. It was built in 1975, so it is 50 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 304 vehicles a day, roughly 15% of them trucks, projected to reach 550 by 2042. The structure is 32 ft (9.8 m) long and 40 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesHenriot Road
CrossesLacamas Creek
Location3.5 N Toledo
RouteCounty Highway 55530
CountyLewis County
StateWashington
Coordinates46.47823, -122.86551
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating20.9 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width40 ft (12.2 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic304 (2022)
Projected traffic550 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$638,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Henriot Road over Lacamas Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is Henriot Road over Lacamas 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 January 2023.

How much traffic does Henriot Road over Lacamas Creek carry?

About 304 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is Henriot Road over Lacamas Creek?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 40 ft wide.

Who owns Henriot Road over Lacamas Creek?

It is owned by the County Highway Agency.