US Bridges

Interstate 8 WB over Mtdb BNSF AMTRAK I 5 Pac

Fair

San Diego County, California · 11-SD-008-L2.36-SD · Structure no. 57 0568L

Built
1969
56 years old
Condition
Fair
inspected March 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
1,056 ft
11 main spans
Daily traffic
55,000
2014 count
Owner
State
State Highway Agency

About this bridge

Interstate 8 WB over Mtdb BNSF AMTRAK I 5 Pac is a concrete continuous box beam or girders - multiple carrying Interstate 8 WB over Mtdb BNSF AMTRAK I 5 Pac in San Diego County, California. It was built in 1969, so it is 56 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 55,000 vehicles a day, roughly 1% of them trucks, projected to reach 84,956 by 2042. The structure is 1,056 ft (321.9 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 8 WB
CrossesMtdb BNSF AMTRAK I 5 Pac
Location11-SD-008-L2.36-SD
RouteInterstate 8
Coordinates32.75966, -117.20439
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.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.1 US tons
Inventory rating42.5 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans11
Design loadHS 20 + Mod
Structure length1,056 ft (321.9 m)
Longest span117 ft (35.7 m)
Deck width40 ft (12.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deck15 ft (4.7 m)

Traffic and service

Average daily traffic55,000 (2014)
Projected traffic84,956 by 2042
Trucks1%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Interstate 8 WB over Mtdb BNSF AMTRAK I 5 Pac built?

It was built in 1969, making it 56 years old in 2025.

What condition is Interstate 8 WB over Mtdb BNSF AMTRAK I 5 Pac 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 March 2024.

How much traffic does Interstate 8 WB over Mtdb BNSF AMTRAK I 5 Pac carry?

About 55,000 vehicles per day (2014 count), of which roughly 1% are trucks.

How long is Interstate 8 WB over Mtdb BNSF AMTRAK I 5 Pac?

The structure is 1,056 ft (321.9 m) long with a longest span of 117 ft (35.7 m) and a deck 40 ft wide.

Who owns Interstate 8 WB over Mtdb BNSF AMTRAK I 5 Pac?

It is owned by the State Highway Agency.