US Bridges

State Route 111 NB over Central Main Canal

Good

Imperial County, California · 11-IMP-111-R2.70 · Structure no. 58 0077R

Built
1965
60 years old, rebuilt 1998
Condition
Good
inspected October 2024
Type
Tee Beam
Concrete Continuous
Length
84 ft
2 main spans
Daily traffic
17,000
2018 count
Owner
State
State Highway Agency

About this bridge

State Route 111 NB over Central Main Canal is a concrete continuous tee beam carrying State Route 111 NB over Central Main Canal in Imperial County, California. It was built in 1965 and reconstructed in 1998, so it is 60 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 17,000 vehicles a day, roughly 8% of them trucks, projected to reach 38,129 by 2041. The structure is 84 ft (25.6 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesState Route 111 NB
CrossesCentral Main Canal
Location11-IMP-111-R2.70
RouteState Highway 111
Coordinates32.70122, -115.49922
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.6 US tons
Inventory rating30 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length84 ft (25.6 m)
Longest span41 ft (12.5 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,000 (2018)
Projected traffic38,129 by 2041
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 State Route 111 NB over Central Main Canal built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1998.

What condition is State Route 111 NB over Central Main Canal 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 October 2024.

How much traffic does State Route 111 NB over Central Main Canal carry?

About 17,000 vehicles per day (2018 count), of which roughly 8% are trucks.

How long is State Route 111 NB over Central Main Canal?

The structure is 84 ft (25.6 m) long with a longest span of 41 ft (12.5 m) and a deck 41 ft wide.

Who owns State Route 111 NB over Central Main Canal?

It is owned by the State Highway Agency.