US Bridges

Harmony DR over Coal Creek

Fair

Cowlitz County, Washington · 0.35 NW Coal Crk RD (0.54 · Structure no. 081066000000000

Built
1953
72 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
57 ft
2 main spans
Daily traffic
2,253
2019 count
Owner
County
County Highway Agency

About this bridge

Harmony DR over Coal Creek is a concrete continuous slab carrying Harmony DR over Coal Creek in Cowlitz 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 2,253 vehicles a day, roughly 2% of them trucks, projected to reach 3,180 by 2040. The structure is 57 ft (17.4 m) long and 26 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesHarmony DR
CrossesCoal Creek
Location0.35 NW Coal Crk RD (0.54
RouteCounty Highway 21810
CountyCowlitz County
StateWashington
Coordinates46.18667, -123.03613
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length57 ft (17.4 m)
Longest span25 ft (7.6 m)
Deck width26 ft (7.8 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,253 (2019)
Projected traffic3,180 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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$2.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Harmony DR over Coal Creek built?

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

What condition is Harmony DR over Coal 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 2023.

How much traffic does Harmony DR over Coal Creek carry?

About 2,253 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is Harmony DR over Coal Creek?

The structure is 57 ft (17.4 m) long with a longest span of 25 ft (7.6 m) and a deck 26 ft wide.

Who owns Harmony DR over Coal Creek?

It is owned by the County Highway Agency.