US Bridges

State Route 111 SB over Rockwood Canal

Good

Imperial County, California · 11-IMP-111-R20.58 · Structure no. 58 0335L

Built
2003
22 years old
Condition
Good
inspected October 2024
Type
Slab
Concrete
Length
39 ft
1 main span
Daily traffic
17,580
2018 count
Owner
State
State Highway Agency

About this bridge

State Route 111 SB over Rockwood Canal is a concrete slab carrying State Route 111 SB over Rockwood Canal in Imperial County, California. It was built in 2003, so it is 22 years old, younger 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 17,580 vehicles a day, roughly 25% of them trucks, projected to reach 29,500 by 2041. The structure is 39 ft (12 m) long and 41 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesState Route 111 SB
CrossesRockwood Canal
Location11-IMP-111-R20.58
RouteState Highway 111
Coordinates32.95614, -115.50919
Functional classRural Principal Arterial - Other

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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than 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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length39 ft (12 m)
Longest span38 ft (11.5 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,580 (2018)
Projected traffic29,500 by 2041
Trucks25%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 SB over Rockwood Canal built?

It was built in 2003, making it 22 years old in 2025.

What condition is State Route 111 SB over Rockwood 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 SB over Rockwood Canal carry?

About 17,580 vehicles per day (2018 count), of which roughly 25% are trucks.

How long is State Route 111 SB over Rockwood Canal?

The structure is 39 ft (12 m) long with a longest span of 38 ft (11.5 m) and a deck 41 ft wide.

Who owns State Route 111 SB over Rockwood Canal?

It is owned by the State Highway Agency.