US Bridges

Gerking Flat Road over Gerking Creek

Good

Umatilla County, Oregon · 0.6 Mi. North of Hwy. 332 · Structure no. 59C562073100003

Built
1998
27 years old
Condition
Good
inspected July 2023
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
22 ft
1 main span
Daily traffic
324
2020 count
Owner
County
County Highway Agency

About this bridge

Gerking Flat Road over Gerking Creek is a aluminum, wrought iron, or cast iron culvert carrying Gerking Flat Road over Gerking Creek in Umatilla County, Oregon. It was built in 1998, so it is 27 years old, younger than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 324 vehicles a day, roughly 39% of them trucks, projected to reach 376 by 2025. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesGerking Flat Road
CrossesGerking Creek
Location0.6 Mi. North of Hwy. 332
RouteCounty Highway C0731
CountyUmatilla County
StateOregon
Coordinates45.824, -118.54927
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
Channel and channel protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.3 US tons
Inventory rating29.7 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans1
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span22 ft (6.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic324 (2020)
Projected traffic376 by 2025
Trucks39%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Gerking Flat Road over Gerking Creek built?

It was built in 1998, making it 27 years old in 2025.

What condition is Gerking Flat Road over Gerking Creek 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 July 2023.

How much traffic does Gerking Flat Road over Gerking Creek carry?

About 324 vehicles per day (2020 count), of which roughly 39% are trucks.

How long is Gerking Flat Road over Gerking Creek?

The structure is 22 ft (6.7 m) long with a longest span of 22 ft (6.7 m).

Who owns Gerking Flat Road over Gerking Creek?

It is owned by the County Highway Agency.