US Bridges

Danley Road over Glenn-Colusa Canal

Fair

Colusa County, California · 0.7 MI N Freshwater RD · Structure no. 15C0057

Built
1924
101 years old, rebuilt 1948
Condition
Fair
inspected December 2024
Type
Slab
Concrete Continuous
Length
32 ft
2 main spans
Daily traffic
161
2015 count
Owner
County
County Highway Agency

About this bridge

Danley Road over Glenn-Colusa Canal is a concrete continuous slab carrying Danley Road over Glenn-Colusa Canal in Colusa County, California. It was built in 1924 and reconstructed in 1948, so it is 101 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 161 vehicles a day, roughly 10% of them trucks, projected to reach 355 by 2044. The structure is 32 ft (9.8 m) long and 27 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesDanley Road
CrossesGlenn-Colusa Canal
Location0.7 MI N Freshwater RD
RouteCounty Highway 0
CountyColusa County
StateCalifornia
Coordinates39.18485, -122.24372
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.7 US tons
Inventory rating17.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span8 ft (2.4 m)
Deck width27 ft (8.2 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic161 (2015)
Projected traffic355 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 Danley Road over Glenn-Colusa Canal built?

It was built in 1924, making it 101 years old in 2025. It was reconstructed in 1948.

What condition is Danley Road 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 December 2024.

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

About 161 vehicles per day (2015 count), of which roughly 10% are trucks.

How long is Danley Road over Glenn-Colusa Canal?

The structure is 32 ft (9.8 m) long with a longest span of 8 ft (2.4 m) and a deck 27 ft wide.

Who owns Danley Road over Glenn-Colusa Canal?

It is owned by the County Highway Agency.