US Bridges

J a Moore RD over Mason Creek

Fair

Clark County, Washington · 0.3S NE 299th ST · Structure no. 081580000000000

Built
1930
95 years old, rebuilt 1958
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
24 ft
1 main span
Daily traffic
1,151
2022 count
Owner
County
County Highway Agency

About this bridge

J a Moore RD over Mason Creek is a steel stringer/multi-beam or girder carrying J a Moore RD over Mason Creek in Clark County, Washington. It was built in 1930 and reconstructed in 1958, so it is 95 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 1,151 vehicles a day, roughly 24% of them trucks, projected to reach 1,910 by 2042. The structure is 24 ft (7.3 m) long and 24 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesJ a Moore RD
CrossesMason Creek
Location0.3S NE 299th ST
RouteCounty Highway 62010
CountyClark County
StateWashington
Coordinates45.83325, -122.62543
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating50.7 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,151 (2022)
Projected traffic1,910 by 2042
Trucks24%
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 statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of relocation of road
Estimated improvement cost$1.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was J a Moore RD over Mason Creek built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1958.

What condition is J a Moore RD over Mason 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 January 2024.

How much traffic does J a Moore RD over Mason Creek carry?

About 1,151 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is J a Moore RD over Mason Creek?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m) and a deck 24 ft wide.

Who owns J a Moore RD over Mason Creek?

It is owned by the County Highway Agency.