US Bridges

County RD 24 over Central Irrigation Canal

Fair

Glenn County, California · 0.3 MI West of SH 45 · Structure no. 11C0038

Built
1948
77 years old
Condition
Fair
inspected February 2024
Type
Slab
Concrete Continuous
Length
102 ft
4 main spans
Daily traffic
634
2018 count
Owner
County
County Highway Agency

About this bridge

County RD 24 over Central Irrigation Canal is a concrete continuous slab carrying County RD 24 over Central Irrigation Canal in Glenn County, California. It was built in 1948, so it is 77 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 634 vehicles a day, roughly 15% of them trucks, projected to reach 731 by 2044. The structure is 102 ft (31.1 m) long and 31 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesCounty RD 24
CrossesCentral Irrigation Canal
Location0.3 MI West of SH 45
RouteCounty Highway 0
CountyGlenn County
StateCalifornia
Coordinates39.70894, -122.00896
Functional classRural Major 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating33.2 US tons
Inventory rating20 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length102 ft (31.1 m)
Longest span30 ft (9.1 m)
Deck width31 ft (9.4 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic634 (2018)
Projected traffic731 by 2044
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 County RD 24 over Central Irrigation Canal built?

It was built in 1948, making it 77 years old in 2025.

What condition is County RD 24 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 County RD 24 over Central Irrigation Canal carry?

About 634 vehicles per day (2018 count), of which roughly 15% are trucks.

How long is County RD 24 over Central Irrigation Canal?

The structure is 102 ft (31.1 m) long with a longest span of 30 ft (9.1 m) and a deck 31 ft wide.

Who owns County RD 24 over Central Irrigation Canal?

It is owned by the County Highway Agency.