US Bridges

W78-S15 Connector over Metcalf Street

Fair

San Diego County, California · 11-SD-078-R16.66-ESD · Structure no. 57 0506F

Built
1977
48 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
144 ft
1 main span
Daily traffic
9,000
2020 count
Owner
State
State Highway Agency

About this bridge

W78-S15 Connector over Metcalf Street is a prestressed concrete box beam or girders - multiple carrying W78-S15 Connector over Metcalf Street 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 9,000 vehicles a day, roughly 1% of them trucks, projected to reach 12,572 by 2040. The structure is 144 ft (43.9 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesW78-S15 Connector
CrossesMetcalf Street
Location11-SD-078-R16.66-ESD
RouteState Highway 78
CountySan Diego County
StateCalifornia
Coordinates33.12795, -117.10269
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 inspectionApril 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 rating107.8 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length144 ft (43.9 m)
Longest span143 ft (43.6 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,000 (2020)
Projected traffic12,572 by 2040
Trucks1%
Lanes on structure1
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 W78-S15 Connector over Metcalf Street built?

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

What condition is W78-S15 Connector over Metcalf Street 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 April 2023.

How much traffic does W78-S15 Connector over Metcalf Street carry?

About 9,000 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is W78-S15 Connector over Metcalf Street?

The structure is 144 ft (43.9 m) long with a longest span of 143 ft (43.6 m) and a deck 31 ft wide.

Who owns W78-S15 Connector over Metcalf Street?

It is owned by the State Highway Agency.