US Bridges

Shank Road over Alamo River

Fair

Imperial County, California · 1.1 MI W/O SR 115 · Structure no. 58C0141

Built
1992
33 years old
Condition
Fair
inspected December 2023
Type
Slab
Concrete Continuous
Length
147 ft
4 main spans
Daily traffic
1,000
2023 count
Owner
County
County Highway Agency

About this bridge

Shank Road over Alamo River is a concrete continuous slab carrying Shank Road over Alamo River in Imperial County, California. It was built in 1992, so it is 33 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 1,000 vehicles a day, roughly 2% of them trucks, projected to reach 1,308 by 2045. The structure is 147 ft (44.8 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesShank Road
CrossesAlamo River
Location1.1 MI W/O SR 115
RouteCounty Highway 0
Coordinates33.00109, -115.46812
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length147 ft (44.8 m)
Longest span36 ft (11 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2023)
Projected traffic1,308 by 2045
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Shank Road over Alamo River built?

It was built in 1992, making it 33 years old in 2025.

What condition is Shank Road over Alamo River 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 Shank Road over Alamo River carry?

About 1,000 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Shank Road over Alamo River?

The structure is 147 ft (44.8 m) long with a longest span of 36 ft (11 m) and a deck 34 ft wide.

Who owns Shank Road over Alamo River?

It is owned by the County Highway Agency.