US Bridges

Carter RD over Westside Main Canal

Fair

Imperial County, California · 70 Ft S/O Webster RD · Structure no. 58C0188

Built
1974
51 years old
Condition
Fair
inspected December 2023
Type
Slab
Concrete Continuous
Length
68 ft
2 main spans
Daily traffic
800
2019 count
Owner
County
County Highway Agency

About this bridge

Carter RD over Westside Main Canal is a concrete continuous slab carrying Carter RD over Westside Main Canal in Imperial County, California. It was built in 1974, so it is 51 years old, younger 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 800 vehicles a day, roughly 1% of them trucks, projected to reach 1,091 by 2041. The structure is 68 ft (20.7 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesCarter RD
CrossesWestside Main Canal
Location70 Ft S/O Webster RD
RouteCounty Highway 0
CountyImperial County
StateCalifornia
Coordinates32.9716, -115.57912
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.1 US tons
Inventory rating60.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length68 ft (20.7 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 traffic800 (2019)
Projected traffic1,091 by 2041
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Carter RD over Westside Main Canal built?

It was built in 1974, making it 51 years old in 2025.

What condition is Carter RD over Westside Main 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 2023.

How much traffic does Carter RD over Westside Main Canal carry?

About 800 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is Carter RD over Westside Main Canal?

The structure is 68 ft (20.7 m) long with a longest span of 32 ft (9.8 m) and a deck 33 ft wide.

Who owns Carter RD over Westside Main Canal?

It is owned by the County Highway Agency.