US Bridges

Basilone Road over S. Fork San Onofre Creek

Fair

San Diego County, California · 330 SE of Airfield Road · Structure no. 2CA0007

Built
1960
65 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
37 ft
3 main spans
Daily traffic
4,775
2004 count
Owner
Federal
Navy / Marines

About this bridge

Basilone Road over S. Fork San Onofre Creek is a concrete culvert carrying Basilone Road over S. Fork San Onofre Creek in San Diego County, California. It was built in 1960, so it is 65 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 6 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 4,775 vehicles a day, roughly 1% of them trucks, projected to reach 5,730 by 2043. The structure is 37 ft (11.4 m) long and 51 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesBasilone Road
CrossesS. Fork San Onofre Creek
Location330 SE of Airfield Road
RouteFederal Lands Road 0
CountySan Diego County
StateCalifornia
Coordinates33.37809, -117.48084
Functional classRural Major 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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.9 US tons
Inventory rating35.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length37 ft (11.4 m)
Longest span12 ft (3.6 m)
Deck width51 ft (15.6 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,775 (2004)
Projected traffic5,730 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNavy / Marines
Maintained byNavy / Marines
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$55,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Basilone Road over S. Fork San Onofre Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is Basilone Road over S. Fork San Onofre 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 October 2024.

How much traffic does Basilone Road over S. Fork San Onofre Creek carry?

About 4,775 vehicles per day (2004 count), of which roughly 1% are trucks.

How long is Basilone Road over S. Fork San Onofre Creek?

The structure is 37 ft (11.4 m) long with a longest span of 12 ft (3.6 m) and a deck 51 ft wide.

Who owns Basilone Road over S. Fork San Onofre Creek?

It is owned by the Navy / Marines.