US Bridges

Old Highway 395 over Keys Canyon

Fair

San Diego County, California · 0.6 MI S/O Route 76 · Structure no. 57C0476

Built
1947
78 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
159 ft
3 main spans
Daily traffic
6,567
2021 count
Owner
County
County Highway Agency

About this bridge

Old Highway 395 over Keys Canyon is a steel continuous stringer/multi-beam or girder carrying Old Highway 395 over Keys Canyon in San Diego County, California. It was built in 1947, so it is 78 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 6,567 vehicles a day, roughly 1% of them trucks, projected to reach 5,513 by 2041. The structure is 159 ft (48.5 m) long and 32 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesOld Highway 395
CrossesKeys Canyon
Location0.6 MI S/O Route 76
RouteCounty Highway 0
CountySan Diego County
StateCalifornia
Coordinates33.31916, -117.16007
Functional classUrban Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating34.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length159 ft (48.5 m)
Longest span60 ft (18.3 m)
Deck width32 ft (9.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,567 (2021)
Projected traffic5,513 by 2041
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Old Highway 395 over Keys Canyon built?

It was built in 1947, making it 78 years old in 2025.

What condition is Old Highway 395 over Keys Canyon 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 July 2023.

How much traffic does Old Highway 395 over Keys Canyon carry?

About 6,567 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Old Highway 395 over Keys Canyon?

The structure is 159 ft (48.5 m) long with a longest span of 60 ft (18.3 m) and a deck 32 ft wide.

Who owns Old Highway 395 over Keys Canyon?

It is owned by the County Highway Agency.