US Bridges

Interstate 8 WB over LA Posta CR LA Posta RD

Fair

San Diego County, California · 11-SD-008-R56.83L · Structure no. 57 0756L

Built
1974
51 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
1,060 ft
8 main spans
Daily traffic
8,350
2014 count
Owner
State
State Highway Agency

About this bridge

Interstate 8 WB over LA Posta CR LA Posta RD is a concrete continuous box beam or girders - multiple carrying Interstate 8 WB over LA Posta CR LA Posta RD in San Diego 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 8,350 vehicles a day, roughly 20% of them trucks, projected to reach 12,815 by 2044. The structure is 1,060 ft (323.1 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 8 WB
CrossesLA Posta CR LA Posta RD
Location11-SD-008-R56.83L
RouteInterstate 8
Coordinates32.72766, -116.42724
Functional classRural Principal Arterial - Interstate

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 inspectionMay 2023
Inspection intervalevery 24 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating105.1 US tons
Inventory rating63.2 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length1,060 ft (323.1 m)
Longest span140 ft (42.7 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,350 (2014)
Projected traffic12,815 by 2044
Trucks20%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Interstate 8 WB over LA Posta CR LA Posta RD built?

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

What condition is Interstate 8 WB over LA Posta CR LA Posta RD 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 May 2023.

How much traffic does Interstate 8 WB over LA Posta CR LA Posta RD carry?

About 8,350 vehicles per day (2014 count), of which roughly 20% are trucks.

How long is Interstate 8 WB over LA Posta CR LA Posta RD?

The structure is 1,060 ft (323.1 m) long with a longest span of 140 ft (42.7 m) and a deck 42 ft wide.

Who owns Interstate 8 WB over LA Posta CR LA Posta RD?

It is owned by the State Highway Agency.