US Bridges

Nicholson Road over Annie Creek Slough

GoodPosted for load

Klamath County, Oregon · 0185 MI West of HWY 62 · Structure no. 35C166141900185

Built
1960
65 years old
Condition
Good
inspected March 2023
Type
Culvert
Concrete Continuous
Length
26 ft
4 main spans
Daily traffic
344
2020 count
Owner
County
County Highway Agency

About this bridge

Nicholson Road over Annie Creek Slough is a concrete continuous culvert carrying Nicholson Road over Annie Creek Slough in Klamath County, Oregon. It was built in 1960, so it is 65 years old, older 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 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 344 vehicles a day, roughly 10% of them trucks, projected to reach 375 by 2025. The structure is 26 ft (7.9 m) long and 30 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

CarriesNicholson Road
CrossesAnnie Creek Slough
Location0185 MI West of HWY 62
RouteCounty Highway C1419
StateOregon
Coordinates42.70472, -122.03119
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.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating21.3 US tons
Inventory rating16.4 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span6 ft (1.8 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic344 (2020)
Projected traffic375 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed4.3 mi (7 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 Nicholson Road over Annie Creek Slough built?

It was built in 1960, making it 65 years old in 2025.

What condition is Nicholson Road over Annie Creek Slough 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 March 2023.

How much traffic does Nicholson Road over Annie Creek Slough carry?

About 344 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Nicholson Road over Annie Creek Slough?

The structure is 26 ft (7.9 m) long with a longest span of 6 ft (1.8 m) and a deck 30 ft wide.

Who owns Nicholson Road over Annie Creek Slough?

It is owned by the County Highway Agency.