US Bridges

Harris Road over Alamo River

Fair

Imperial County, California · 1.8 MI E/O Mcconnell RD · Structure no. 58C0082

Built
1970
55 years old
Condition
Fair
inspected January 2024
Type
Slab
Concrete Continuous
Length
145 ft
5 main spans
Daily traffic
320
2020 count
Owner
County
County Highway Agency

About this bridge

Harris Road over Alamo River is a concrete continuous slab carrying Harris Road over Alamo River in Imperial County, California. It was built in 1970, so it is 55 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 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 320 vehicles a day, roughly 2% of them trucks, projected to reach 809 by 2042. The structure is 145 ft (44.2 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesHarris Road
CrossesAlamo River
Location1.8 MI E/O Mcconnell RD
RouteCounty Highway 0
CountyImperial County
StateCalifornia
Coordinates32.88296, -115.45252
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 inspectionJanuary 2024
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 geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.7 US tons
Inventory rating41.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length145 ft (44.2 m)
Longest span29 ft (8.8 m)
Deck width32 ft (9.9 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic320 (2020)
Projected traffic809 by 2042
Trucks2%
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 Harris Road over Alamo River built?

It was built in 1970, making it 55 years old in 2025.

What condition is Harris 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 January 2024.

How much traffic does Harris Road over Alamo River carry?

About 320 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Harris Road over Alamo River?

The structure is 145 ft (44.2 m) long with a longest span of 29 ft (8.8 m) and a deck 32 ft wide.

Who owns Harris Road over Alamo River?

It is owned by the County Highway Agency.