US Bridges

Keffer RD over Alamo River

Fair

Imperial County, California · 0.5 MI E/O SR-7 · Structure no. 58C0117

Built
1965
60 years old
Condition
Fair
inspected January 2024
Type
Tee Beam
Concrete Continuous
Length
192 ft
3 main spans
Daily traffic
500
2016 count
Owner
County
County Highway Agency

About this bridge

Keffer RD over Alamo River is a concrete continuous tee beam carrying Keffer RD over Alamo River in Imperial County, California. It was built in 1965, 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 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 500 vehicles a day, roughly 1% of them trucks, projected to reach 670 by 2044. The structure is 192 ft (58.5 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesKeffer RD
CrossesAlamo River
Location0.5 MI E/O SR-7
RouteCounty Highway 0
CountyImperial County
StateCalifornia
Coordinates32.73048, -115.37306
Functional classRural Major 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJanuary 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 adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30 US tons
Inventory rating22.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length192 ft (58.5 m)
Longest span76 ft (23.2 m)
Deck width30 ft (9.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2016)
Projected traffic670 by 2044
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Keffer RD over Alamo River built?

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

What condition is Keffer RD 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 Keffer RD over Alamo River carry?

About 500 vehicles per day (2016 count), of which roughly 1% are trucks.

How long is Keffer RD over Alamo River?

The structure is 192 ft (58.5 m) long with a longest span of 76 ft (23.2 m) and a deck 30 ft wide.

Who owns Keffer RD over Alamo River?

It is owned by the County Highway Agency.