US Bridges

State Route 78 WB over Metcalf Street

Fair

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

Built
1964
61 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
147 ft
3 main spans
Daily traffic
44,500
2020 count
Owner
State
State Highway Agency

About this bridge

State Route 78 WB over Metcalf Street is a concrete continuous box beam or girders - multiple carrying State Route 78 WB over Metcalf Street in San Diego County, California. It was built in 1964, so it is 61 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 44,500 vehicles a day, roughly 5% of them trucks, projected to reach 58,973 by 2040. The structure is 147 ft (44.8 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesState Route 78 WB
CrossesMetcalf Street
Location11-SD-078-R16.66-ESD
RouteState Highway 78
Coordinates33.12782, -117.10261
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.7 US tons
Inventory rating33.2 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length147 ft (44.8 m)
Longest span82 ft (25 m)
Deck width40 ft (12.1 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44,500 (2020)
Projected traffic58,973 by 2040
Trucks5%
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 State Route 78 WB over Metcalf Street built?

It was built in 1964, making it 61 years old in 2025.

What condition is State Route 78 WB 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 State Route 78 WB over Metcalf Street carry?

About 44,500 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is State Route 78 WB over Metcalf Street?

The structure is 147 ft (44.8 m) long with a longest span of 82 ft (25 m) and a deck 40 ft wide.

Who owns State Route 78 WB over Metcalf Street?

It is owned by the State Highway Agency.