US Bridges

SR 500 over Lacamas Creek

Fair

Clark County, Washington · 4.0 E JCT SR 503 · Structure no. 0005384A0000000

Built
1957
68 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
120 ft
3 main spans
Daily traffic
9,017
2023 count
Owner
State
State Highway Agency

About this bridge

SR 500 over Lacamas Creek is a concrete continuous slab carrying SR 500 over Lacamas Creek in Clark County, Washington. It was built in 1957, so it is 68 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 9,017 vehicles a day, roughly 7% of them trucks, projected to reach 13,576 by 2039. The structure is 120 ft (36.6 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSR 500
CrossesLacamas Creek
Location4.0 E JCT SR 503
RouteState Highway 500
CountyClark County
StateWashington
Coordinates45.6717, -122.48799
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating31 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length120 ft (36.6 m)
Longest span47 ft (14.3 m)
Deck width34 ft (10.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,017 (2023)
Projected traffic13,576 by 2039
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 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$1.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 500 over Lacamas Creek built?

It was built in 1957, making it 68 years old in 2025.

What condition is SR 500 over Lacamas 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 September 2024.

How much traffic does SR 500 over Lacamas Creek carry?

About 9,017 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is SR 500 over Lacamas Creek?

The structure is 120 ft (36.6 m) long with a longest span of 47 ft (14.3 m) and a deck 34 ft wide.

Who owns SR 500 over Lacamas Creek?

It is owned by the State Highway Agency.