US Bridges

Road Tt over Drain a

Good

Glenn County, California · 0.1 MI S Road 41 · Structure no. 11C0131

Built
1940
85 years old
Condition
Good
inspected February 2024
Type
Tee Beam
Concrete
Length
25 ft
1 main span
Daily traffic
62
2018 count
Owner
County
County Highway Agency

About this bridge

Road Tt over Drain a is a concrete tee beam carrying Road Tt over Drain a in Glenn County, California. It was built in 1940, so it is 85 years old, older than the California average of 54.8 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.

It carries about 62 vehicles a day, projected to reach 81 by 2044. The structure is 25 ft (7.6 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesRoad Tt
CrossesDrain a
Location0.1 MI S Road 41
RouteCounty Highway 0
Coordinates39.57167, -122.08386
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating31.7 US tons
Inventory rating19 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span23 ft (7 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic62 (2018)
Projected traffic81 by 2044
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Tt over Drain a built?

It was built in 1940, making it 85 years old in 2025.

What condition is Road Tt over Drain a 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 February 2024.

How much traffic does Road Tt over Drain a carry?

About 62 vehicles per day (2018 count).

How long is Road Tt over Drain a?

The structure is 25 ft (7.6 m) long with a longest span of 23 ft (7 m) and a deck 27 ft wide.

Who owns Road Tt over Drain a?

It is owned by the County Highway Agency.