US Bridges

Rock Crk RD over Rock Creek

Fair

Clark County, Washington · 0.1 E JCT SR 503 · Structure no. 079929000000000

Built
1949
76 years old
Condition
Fair
inspected November 2023
Type
Slab
Concrete
Length
42 ft
2 main spans
Daily traffic
2,014
2022 count
Owner
County
County Highway Agency

About this bridge

Rock Crk RD over Rock Creek is a concrete slab carrying Rock Crk RD over Rock Creek in Clark County, Washington. It was built in 1949, so it is 76 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 2,014 vehicles a day, roughly 9% of them trucks, projected to reach 5,544 by 2038. The structure is 42 ft (12.8 m) long and 24 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesRock Crk RD
CrossesRock Creek
Location0.1 E JCT SR 503
RouteCounty Highway 95100
CountyClark County
StateWashington
Coordinates45.8562, -122.51982
Functional classRural Major Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.4 US tons
Inventory rating32.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length42 ft (12.8 m)
Longest span21 ft (6.4 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,014 (2022)
Projected traffic5,544 by 2038
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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$1.9 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rock Crk RD over Rock Creek built?

It was built in 1949, making it 76 years old in 2025.

What condition is Rock Crk RD over Rock 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 November 2023.

How much traffic does Rock Crk RD over Rock Creek carry?

About 2,014 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is Rock Crk RD over Rock Creek?

The structure is 42 ft (12.8 m) long with a longest span of 21 ft (6.4 m) and a deck 24 ft wide.

Who owns Rock Crk RD over Rock Creek?

It is owned by the County Highway Agency.