US Bridges

State Route 78 over Escondido Creek

Good

San Diego County, California · 11-SD-078-T19.19-ESD · Structure no. 57 0934

Built
1970
55 years old
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
70 ft
1 main span
Daily traffic
22,500
2014 count
Owner
State
State Highway Agency

About this bridge

State Route 78 over Escondido Creek is a prestressed concrete box beam or girders - multiple carrying State Route 78 over Escondido Creek in San Diego County, California. It was built in 1970, so it is 55 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 22,500 vehicles a day, roughly 1% of them trucks, projected to reach 26,193 by 2040. The structure is 70 ft (21.3 m) long and 76 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesState Route 78
CrossesEscondido Creek
Location11-SD-078-T19.19-ESD
RouteState Highway 78
Coordinates33.13183, -117.06755
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating81.8 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span65 ft (19.8 m)
Deck width76 ft (23.2 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,500 (2014)
Projected traffic26,193 by 2040
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was State Route 78 over Escondido Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is State Route 78 over Escondido Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does State Route 78 over Escondido Creek carry?

About 22,500 vehicles per day (2014 count), of which roughly 1% are trucks.

How long is State Route 78 over Escondido Creek?

The structure is 70 ft (21.3 m) long with a longest span of 65 ft (19.8 m) and a deck 76 ft wide.

Who owns State Route 78 over Escondido Creek?

It is owned by the State Highway Agency.