US Bridges

Post Canyon RD#105 over Phelps CR

Fair

Hood River County, Oregon · 00.39M JCT Country Clb RD · Structure no. 27C05 105 00114

Built
1972
53 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
420
2020 count
Owner
County
County Highway Agency

About this bridge

Post Canyon RD#105 over Phelps CR is a concrete culvert carrying Post Canyon RD#105 over Phelps CR in Hood River County, Oregon. It was built in 1972, so it is 53 years old, older than the Oregon average of 49.9 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 420 vehicles a day, roughly 10% of them trucks, projected to reach 450 by 2025. The structure is 24 ft (7.3 m) long and 26 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesPost Canyon RD#105
CrossesPhelps CR
Location00.39M JCT Country Clb RD
RouteCounty Highway C0105
StateOregon
Coordinates45.69723, -121.57512
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating23.9 US tons
Inventory rating18.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span23 ft (6.9 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic420 (2020)
Projected traffic450 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway 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 Post Canyon RD#105 over Phelps CR built?

It was built in 1972, making it 53 years old in 2025.

What condition is Post Canyon RD#105 over Phelps CR 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 2024.

How much traffic does Post Canyon RD#105 over Phelps CR carry?

About 420 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Post Canyon RD#105 over Phelps CR?

The structure is 24 ft (7.3 m) long with a longest span of 23 ft (6.9 m) and a deck 26 ft wide.

Who owns Post Canyon RD#105 over Phelps CR?

It is owned by the County Highway Agency.