US Bridges

Interstate 8 EB over Midway Drive

Fair

San Diego County, California · 11-SD-008-L1.23-SD · Structure no. 57 0705R

Built
1969
56 years old
Condition
Fair
inspected February 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
278 ft
2 main spans
Daily traffic
24,250
2014 count
Owner
State
State Highway Agency

About this bridge

Interstate 8 EB over Midway Drive is a prestressed concrete continuous box beam or girders - multiple carrying Interstate 8 EB over Midway Drive 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 24,250 vehicles a day, roughly 1% of them trucks, projected to reach 88,417 by 2046. The structure is 278 ft (84.7 m) long and 65 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesInterstate 8 EB
CrossesMidway Drive
Location11-SD-008-L1.23-SD
RouteState Highway 8
CountySan Diego County
StateCalifornia
Coordinates32.75675, -117.22315
Functional classUrban 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 inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment9: Superior to present desirable criteria
Operating rating100.3 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length278 ft (84.7 m)
Longest span158 ft (48.2 m)
Deck width65 ft (19.8 m)
Roadway width63 ft (19.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,250 (2014)
Projected traffic88,417 by 2046
Trucks1%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Interstate 8 EB over Midway Drive built?

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

What condition is Interstate 8 EB over Midway Drive 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 February 2024.

How much traffic does Interstate 8 EB over Midway Drive carry?

About 24,250 vehicles per day (2014 count), of which roughly 1% are trucks.

How long is Interstate 8 EB over Midway Drive?

The structure is 278 ft (84.7 m) long with a longest span of 158 ft (48.2 m) and a deck 65 ft wide.

Who owns Interstate 8 EB over Midway Drive?

It is owned by the State Highway Agency.