US Bridges

S15-E78 Connector over RTE 15 RTE 78 Conns ST

Fair

San Diego County, California · 11-SD-015-R31.56 · Structure no. 57 0816F

Built
1977
48 years old
Condition
Fair
inspected March 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
1,187 ft
8 main spans
Daily traffic
4,900
2018 count
Owner
State
State Highway Agency

About this bridge

S15-E78 Connector over RTE 15 RTE 78 Conns ST is a prestressed concrete continuous box beam or girders - multiple carrying S15-E78 Connector over RTE 15 RTE 78 Conns ST 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 6 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 4,900 vehicles a day, roughly 2% of them trucks, projected to reach 8,382 by 2046. The structure is 1,187 ft (361.8 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesS15-E78 Connector
CrossesRTE 15 RTE 78 Conns ST
Location11-SD-015-R31.56
RouteInterstate 15
CountySan Diego County
StateCalifornia
Coordinates33.12757, -117.10226
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating44 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length1,187 ft (361.8 m)
Longest span183 ft (55.8 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,900 (2018)
Projected traffic8,382 by 2046
Trucks2%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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 S15-E78 Connector over RTE 15 RTE 78 Conns ST built?

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

What condition is S15-E78 Connector over RTE 15 RTE 78 Conns ST 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 S15-E78 Connector over RTE 15 RTE 78 Conns ST carry?

About 4,900 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is S15-E78 Connector over RTE 15 RTE 78 Conns ST?

The structure is 1,187 ft (361.8 m) long with a longest span of 183 ft (55.8 m) and a deck 31 ft wide.

Who owns S15-E78 Connector over RTE 15 RTE 78 Conns ST?

It is owned by the State Highway Agency.