US Bridges

San Diego Mission over Route 15 Murphy Creek

Fair

San Diego County, California · 11-SD-015-R6.67-SD · Structure no. 57 0624

Built
1967
58 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
383 ft
3 main spans
Daily traffic
11,800
2020 count
Owner
State
State Highway Agency

About this bridge

San Diego Mission over Route 15 Murphy Creek is a concrete continuous box beam or girders - multiple carrying San Diego Mission over Route 15 Murphy Creek in San Diego County, California. It was built in 1967, so it is 58 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 11,800 vehicles a day, roughly 3% of them trucks, projected to reach 13,511 by 2041. The structure is 383 ft (116.7 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSan Diego Mission
CrossesRoute 15 Murphy Creek
Location11-SD-015-R6.67-SD
RouteCity Street 0
Coordinates32.78631, -117.11521
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
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 rating57.1 US tons
Inventory rating44.3 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length383 ft (116.7 m)
Longest span144 ft (43.9 m)
Deck width52 ft (15.7 m)
Roadway width45 ft (13.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,800 (2020)
Projected traffic13,511 by 2041
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
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 San Diego Mission over Route 15 Murphy Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is San Diego Mission over Route 15 Murphy Creek 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 San Diego Mission over Route 15 Murphy Creek carry?

About 11,800 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is San Diego Mission over Route 15 Murphy Creek?

The structure is 383 ft (116.7 m) long with a longest span of 144 ft (43.9 m) and a deck 52 ft wide.

Who owns San Diego Mission over Route 15 Murphy Creek?

It is owned by the State Highway Agency.