US Bridges

Ruff-Marlin Road over Rocky Coulee

FairPosted for load

Grant County, Washington · W NE .1 N of 6 · Structure no. 084784000000000

Built
1974
51 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
100 ft
1 main span
Daily traffic
464
2019 count
Owner
County
County Highway Agency

About this bridge

Ruff-Marlin Road over Rocky Coulee is a prestressed concrete stringer/multi-beam or girder carrying Ruff-Marlin Road over Rocky Coulee in Grant County, Washington. It was built in 1974, so it is 51 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. Its operating status is: posted for load restriction.

It carries about 464 vehicles a day, roughly 37% of them trucks, projected to reach 560 by 2041. The structure is 100 ft (30.5 m) long and 30 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesRuff-Marlin Road
CrossesRocky Coulee
LocationW NE .1 N of 6
RouteCounty Highway 95035
CountyGrant County
StateWashington
Coordinates47.1754, -119.00186
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.5 US tons
Inventory rating22.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20 + Mod
Structure length100 ft (30.5 m)
Longest span99 ft (30.2 m)
Deck width30 ft (9 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic464 (2019)
Projected traffic560 by 2041
Trucks37%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 with deck rehabilitation or replacement
Estimated improvement cost$1.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Ruff-Marlin Road over Rocky Coulee built?

It was built in 1974, making it 51 years old in 2025.

What condition is Ruff-Marlin Road over Rocky Coulee 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 December 2023.

How much traffic does Ruff-Marlin Road over Rocky Coulee carry?

About 464 vehicles per day (2019 count), of which roughly 37% are trucks.

How long is Ruff-Marlin Road over Rocky Coulee?

The structure is 100 ft (30.5 m) long with a longest span of 99 ft (30.2 m) and a deck 30 ft wide.

Who owns Ruff-Marlin Road over Rocky Coulee?

It is owned by the County Highway Agency.