US Bridges

Maintenance Road over Rocky Coulee Wasteway

Good

Grant County, Washington · Rocky Coulee Wasteway · Structure no. 11ELC0008

Built
1949
76 years old
Condition
Good
inspected November 2023
Type
Slab
Concrete
Length
34 ft
2 main spans
Daily traffic
15
2023 count
Owner
Federal
Bureau of Reclamation

About this bridge

Maintenance Road over Rocky Coulee Wasteway is a concrete slab carrying Maintenance Road over Rocky Coulee Wasteway in Grant 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 15 vehicles a day, projected to reach 15 by 2043. The structure is 34 ft (10.4 m) long and 23 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMaintenance Road
CrossesRocky Coulee Wasteway
LocationRocky Coulee Wasteway
CountyGrant County
StateWashington
Coordinates47.20179, -119.18153
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66.2 US tons
Inventory rating39.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length34 ft (10.4 m)
Longest span14 ft (4.3 m)
Deck width23 ft (6.9 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2023)
Projected traffic15 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Reclamation
Maintained byOther Local Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Maintenance Road over Rocky Coulee Wasteway built?

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

What condition is Maintenance Road over Rocky Coulee Wasteway in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.

How much traffic does Maintenance Road over Rocky Coulee Wasteway carry?

About 15 vehicles per day (2023 count).

How long is Maintenance Road over Rocky Coulee Wasteway?

The structure is 34 ft (10.4 m) long with a longest span of 14 ft (4.3 m) and a deck 23 ft wide.

Who owns Maintenance Road over Rocky Coulee Wasteway?

It is owned by the Bureau of Reclamation and maintained by the Other Local Agency.