US Bridges

Range Grade over Patit Creek

FairPosted for load

Columbia County, Washington · 0.02 S JCT 9132 · Structure no. 083105000000000

Built
1973
52 years old
Condition
Fair
inspected October 2023
Type
Channel Beam
Prestressed Concrete
Length
36 ft
1 main span
Daily traffic
25
2019 count
Owner
County
County Highway Agency

About this bridge

Range Grade over Patit Creek is a prestressed concrete channel beam carrying Range Grade over Patit Creek in Columbia County, Washington. It was built in 1973, so it is 52 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 5 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 25 vehicles a day, roughly 15% of them trucks, projected to reach 30 by 2041. The structure is 36 ft (11 m) long and 24 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesRange Grade
CrossesPatit Creek
Location0.02 S JCT 9132
RouteCounty Highway 14730
CountyColumbia County
StateWashington
Coordinates46.33799, -117.89711
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating42.5 US tons
Inventory rating22.5 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span35 ft (10.8 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2019)
Projected traffic30 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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$1.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Range Grade over Patit Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is Range Grade over Patit 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 October 2023.

How much traffic does Range Grade over Patit Creek carry?

About 25 vehicles per day (2019 count), of which roughly 15% are trucks.

How long is Range Grade over Patit Creek?

The structure is 36 ft (11 m) long with a longest span of 35 ft (10.8 m) and a deck 24 ft wide.

Who owns Range Grade over Patit Creek?

It is owned by the County Highway Agency.