US Bridges

Road 57 over Glenn-Colusa Canal

Fair

Glenn County, California · 1.2 MI W/O SH 99 · Structure no. 11C0006

Built
1948
77 years old, rebuilt 1980
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
66 ft
2 main spans
Daily traffic
236
2007 count
Owner
County
County Highway Agency

About this bridge

Road 57 over Glenn-Colusa Canal is a steel stringer/multi-beam or girder carrying Road 57 over Glenn-Colusa Canal in Glenn County, California. It was built in 1948 and reconstructed in 1980, 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 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 236 vehicles a day, roughly 10% of them trucks, projected to reach 318 by 2043. The structure is 66 ft (20.1 m) long and 33 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesRoad 57
CrossesGlenn-Colusa Canal
Location1.2 MI W/O SH 99
RouteCounty Highway 0
CountyGlenn County
StateCalifornia
Coordinates39.49488, -122.2168
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.
Superstructure8 Very GoodNo problems noted.
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.8 US tons
Inventory rating28.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length66 ft (20.1 m)
Longest span32 ft (9.8 m)
Deck width33 ft (10 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic236 (2007)
Projected traffic318 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 57 over Glenn-Colusa Canal built?

It was built in 1948, making it 77 years old in 2025. It was reconstructed in 1980.

What condition is Road 57 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 57 over Glenn-Colusa Canal carry?

About 236 vehicles per day (2007 count), of which roughly 10% are trucks.

How long is Road 57 over Glenn-Colusa Canal?

The structure is 66 ft (20.1 m) long with a longest span of 32 ft (9.8 m) and a deck 33 ft wide.

Who owns Road 57 over Glenn-Colusa Canal?

It is owned by the County Highway Agency.