US Bridges

Clairmont Mesa Bl over ROUTE15

Fair

San Diego County, California · 11-SD-015-R10.00-SD · Structure no. 57 0919

Built
1985
40 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
302 ft
2 main spans
Daily traffic
20,700
2020 count
Owner
State
State Highway Agency

About this bridge

Clairmont Mesa Bl over ROUTE15 is a prestressed concrete continuous box beam or girders - multiple carrying Clairmont Mesa Bl over ROUTE15 in San Diego County, California. It was built in 1985, so it is 40 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 20,700 vehicles a day, roughly 1% of them trucks, projected to reach 31,641 by 2040. The structure is 302 ft (92 m) long and 94 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesClairmont Mesa Bl
CrossesROUTE15
Location11-SD-015-R10.00-SD
RouteCity Street 0
CountySan Diego County
StateCalifornia
Coordinates32.83351, -117.11943
Functional classUrban Minor Arterial

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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length302 ft (92 m)
Longest span152 ft (46.3 m)
Deck width94 ft (28.7 m)
Roadway width82 ft (25 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,700 (2020)
Projected traffic31,641 by 2040
Trucks1%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 Clairmont Mesa Bl over ROUTE15 built?

It was built in 1985, making it 40 years old in 2025.

What condition is Clairmont Mesa Bl over ROUTE15 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 Clairmont Mesa Bl over ROUTE15 carry?

About 20,700 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Clairmont Mesa Bl over ROUTE15?

The structure is 302 ft (92 m) long with a longest span of 152 ft (46.3 m) and a deck 94 ft wide.

Who owns Clairmont Mesa Bl over ROUTE15?

It is owned by the State Highway Agency.