US Bridges

Henrichs Road over Barnum Canyon

Fair

Sherman County, Oregon · 0.01 MI E of HWY 97 · Structure no. 55C011064400001

Built
1970
55 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete
Length
26 ft
1 main span
Daily traffic
74
2020 count
Owner
County
County Highway Agency

About this bridge

Henrichs Road over Barnum Canyon is a concrete slab carrying Henrichs Road over Barnum Canyon in Sherman County, Oregon. It was built in 1970, so it is 55 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 74 vehicles a day, roughly 5% of them trucks, projected to reach 83 by 2025. The structure is 26 ft (7.9 m) long and 30 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesHenrichs Road
CrossesBarnum Canyon
Location0.01 MI E of HWY 97
RouteCounty Highway 0
CountySherman County
StateOregon
Coordinates45.5113, -120.6833
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating41.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span25 ft (7.6 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic74 (2020)
Projected traffic83 by 2025
Trucks5%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$173,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Henrichs Road over Barnum Canyon built?

It was built in 1970, making it 55 years old in 2025.

What condition is Henrichs Road over Barnum Canyon 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 August 2024.

How much traffic does Henrichs Road over Barnum Canyon carry?

About 74 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Henrichs Road over Barnum Canyon?

The structure is 26 ft (7.9 m) long with a longest span of 25 ft (7.6 m) and a deck 30 ft wide.

Who owns Henrichs Road over Barnum Canyon?

It is owned by the County Highway Agency.