US Bridges

E78-S15 Connector over Mission Ave

Fair

San Diego County, California · 11-SD-078-R16.49-ESD · Structure no. 57 0947G

Built
1977
48 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
194 ft
3 main spans
Daily traffic
54,000
2014 count
Owner
State
State Highway Agency

About this bridge

E78-S15 Connector over Mission Ave is a concrete continuous box beam or girders - multiple carrying E78-S15 Connector over Mission Ave in San Diego County, California. It was built in 1977, so it is 48 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 54,000 vehicles a day, roughly 1% of them trucks, projected to reach 70,404 by 2040. The structure is 194 ft (59.1 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesE78-S15 Connector
CrossesMission Ave
Location11-SD-078-R16.49-ESD
RouteState Highway 78
CountySan Diego County
StateCalifornia
Coordinates33.12439, -117.10467
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.8 US tons
Inventory rating36.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length194 ft (59.1 m)
Longest span94 ft (28.7 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54,000 (2014)
Projected traffic70,404 by 2040
Trucks1%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 E78-S15 Connector over Mission Ave built?

It was built in 1977, making it 48 years old in 2025.

What condition is E78-S15 Connector over Mission Ave 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 E78-S15 Connector over Mission Ave carry?

About 54,000 vehicles per day (2014 count), of which roughly 1% are trucks.

How long is E78-S15 Connector over Mission Ave?

The structure is 194 ft (59.1 m) long with a longest span of 94 ft (28.7 m) and a deck 44 ft wide.

Who owns E78-S15 Connector over Mission Ave?

It is owned by the State Highway Agency.