US Bridges

Road 69 over Glenn-Colusa Canal

Fair

Glenn County, California · 0.2 MI W RD D · Structure no. 11C0001

Built
1964
61 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete Continuous
Length
56 ft
3 main spans
Daily traffic
20
2011 count
Owner
County
County Highway Agency

About this bridge

Road 69 over Glenn-Colusa Canal is a concrete continuous slab carrying Road 69 over Glenn-Colusa Canal in Glenn County, California. It was built in 1964, so it is 61 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 20 vehicles a day, projected to reach 49 by 2043. The structure is 56 ft (17.1 m) long and 23 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesRoad 69
CrossesGlenn-Colusa Canal
Location0.2 MI W RD D
RouteCounty Highway 0
CountyGlenn County
StateCalifornia
Coordinates39.39974, -122.2541
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.5 US tons
Inventory rating34.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length56 ft (17.1 m)
Longest span18 ft (5.5 m)
Deck width23 ft (6.9 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2011)
Projected traffic49 by 2043
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 69 over Glenn-Colusa Canal built?

It was built in 1964, making it 61 years old in 2025.

What condition is Road 69 over Glenn-Colusa 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 January 2025.

How much traffic does Road 69 over Glenn-Colusa Canal carry?

About 20 vehicles per day (2011 count).

How long is Road 69 over Glenn-Colusa Canal?

The structure is 56 ft (17.1 m) long with a longest span of 18 ft (5.5 m) and a deck 23 ft wide.

Who owns Road 69 over Glenn-Colusa Canal?

It is owned by the County Highway Agency.