US Bridges

Road 99 W over Logan Creek

Fair

Glenn County, California · 1.2 MI N of Road 68 · Structure no. 11C0198

Built
1914
111 years old, rebuilt 1930
Condition
Fair
inspected August 2023
Type
Culvert
Concrete Continuous
Length
27 ft
3 main spans
Daily traffic
447
2005 count
Owner
County
County Highway Agency

About this bridge

Road 99 W over Logan Creek is a concrete continuous culvert carrying Road 99 W over Logan Creek in Glenn County, California. It was built in 1914 and reconstructed in 1930, so it is 111 years old, older than the California average of 54.8 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 447 vehicles a day, roughly 15% of them trucks, projected to reach 521 by 2043. The structure is 27 ft (8.2 m) long and 68 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

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CarriesRoad 99 W
CrossesLogan Creek
Location1.2 MI N of Road 68
RouteCounty Highway 0
CountyGlenn County
StateCalifornia
Coordinates39.42472, -122.1925
Functional classRural Minor Collector

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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.9 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span9 ft (2.7 m)
Deck width68 ft (20.7 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic447 (2005)
Projected traffic521 by 2043
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 Road 99 W over Logan Creek built?

It was built in 1914, making it 111 years old in 2025. It was reconstructed in 1930.

What condition is Road 99 W over Logan 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 August 2023.

How much traffic does Road 99 W over Logan Creek carry?

About 447 vehicles per day (2005 count), of which roughly 15% are trucks.

How long is Road 99 W over Logan Creek?

The structure is 27 ft (8.2 m) long with a longest span of 9 ft (2.7 m) and a deck 68 ft wide.

Who owns Road 99 W over Logan Creek?

It is owned by the County Highway Agency.