US Bridges

Road 9 over Central Irrigation Canal

Fair

Glenn County, California · Just W of Road 203 · Structure no. 11C0081

Built
1941
84 years old, rebuilt 1990
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
100 ft
3 main spans
Daily traffic
1,553
2018 count
Owner
County
County Highway Agency

About this bridge

Road 9 over Central Irrigation Canal is a steel stringer/multi-beam or girder carrying Road 9 over Central Irrigation Canal in Glenn County, California. It was built in 1941 and reconstructed in 1990, so it is 84 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 5 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 1,553 vehicles a day, roughly 25% of them trucks, projected to reach 1,776 by 2042. The structure is 100 ft (30.5 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesRoad 9
CrossesCentral Irrigation Canal
LocationJust W of Road 203
RouteCounty Highway 0
CountyGlenn County
StateCalifornia
Coordinates39.7664, -122.0314
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating31.4 US tons
Inventory rating19 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length100 ft (30.5 m)
Longest span40 ft (12.2 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,553 (2018)
Projected traffic1,776 by 2042
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 9 over Central Irrigation Canal built?

It was built in 1941, making it 84 years old in 2025. It was reconstructed in 1990.

What condition is Road 9 over Central Irrigation Canal 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 February 2024.

How much traffic does Road 9 over Central Irrigation Canal carry?

About 1,553 vehicles per day (2018 count), of which roughly 25% are trucks.

How long is Road 9 over Central Irrigation Canal?

The structure is 100 ft (30.5 m) long with a longest span of 40 ft (12.2 m) and a deck 30 ft wide.

Who owns Road 9 over Central Irrigation Canal?

It is owned by the County Highway Agency.