US Bridges

P RD NE over Rocky Coulee

GoodPosted for load

Grant County, Washington · P NE 0.6 N of 6 NE · Structure no. 084592000000000

Built
1974
51 years old
Condition
Good
inspected October 2024
Type
Tee Beam
Prestressed Concrete
Length
100 ft
1 main span
Daily traffic
160
2022 count
Owner
County
County Highway Agency

About this bridge

P RD NE over Rocky Coulee is a prestressed concrete tee beam carrying P RD NE 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 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. Its operating status is: posted for load restriction.

It carries about 160 vehicles a day, roughly 28% of them trucks, projected to reach 170 by 2041. The structure is 100 ft (30.5 m) long and 30 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesP RD NE
CrossesRocky Coulee
LocationP NE 0.6 N of 6 NE
RouteCounty Highway 45250
Coordinates47.18213, -119.15023
Functional classRural Minor Collector

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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.1 US tons
Inventory rating28.5 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span99 ft (30.2 m)
Deck width30 ft (9 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic160 (2022)
Projected traffic170 by 2041
Trucks28%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$1.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was P RD NE over Rocky Coulee built?

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

What condition is P RD NE over Rocky Coulee 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 October 2024.

How much traffic does P RD NE over Rocky Coulee carry?

About 160 vehicles per day (2022 count), of which roughly 28% are trucks.

How long is P RD NE 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 P RD NE over Rocky Coulee?

It is owned by the County Highway Agency.