US Bridges

State Route 186 over All American Canal

FairPosted for load

Imperial County, California · 6 Miles NW of Yuma Ari · Structure no. 0304-0098

Built
1938
87 years old
Condition
Fair
inspected February 2023
Type
Slab
Concrete Continuous
Length
140 ft
7 main spans
Daily traffic
13,200
2011 count
Owner
Federal
Bureau of Reclamation

About this bridge

State Route 186 over All American Canal is a concrete continuous slab carrying State Route 186 over All American Canal in Imperial County, California. It was built in 1938, so it is 87 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. Its operating status is: posted for load restriction.

It carries about 13,200 vehicles a day, projected to reach 1,800 by 2035. The structure is 140 ft (42.7 m) long and 27 ft wide. If it were closed, the detour would be 198.8 mi (320 km).

CarriesState Route 186
CrossesAll American Canal
Location6 Miles NW of Yuma Ari
RouteState Highway 186
Coordinates32.73775, -114.71739
Functional classRural Principal Arterial - Other

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.2 US tons
Inventory rating18.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 15
Structure length140 ft (42.7 m)
Longest span20 ft (6.1 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,200 (2011)
Projected traffic1,800 by 2035
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed198.8 mi (320 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Reclamation
Maintained byOther Local 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 State Route 186 over All American Canal built?

It was built in 1938, making it 87 years old in 2025.

What condition is State Route 186 over All American 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 2023.

How much traffic does State Route 186 over All American Canal carry?

About 13,200 vehicles per day (2011 count).

How long is State Route 186 over All American Canal?

The structure is 140 ft (42.7 m) long with a longest span of 20 ft (6.1 m) and a deck 27 ft wide.

Who owns State Route 186 over All American Canal?

It is owned by the Bureau of Reclamation and maintained by the Other Local Agency.