US Bridges

Lilac Road over San Luis Rey River

Good

San Diego County, California · 0.2 MI S/O SR 76 · Structure no. 57C0669

Built
1993
32 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
120 ft
2 main spans
Daily traffic
434
2021 count
Owner
County
County Highway Agency

About this bridge

Lilac Road over San Luis Rey River is a steel stringer/multi-beam or girder carrying Lilac Road over San Luis Rey River in San Diego County, California. It was built in 1993, so it is 32 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 434 vehicles a day, roughly 2% of them trucks, projected to reach 630 by 2043. The structure is 120 ft (36.6 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesLilac Road
CrossesSan Luis Rey River
Location0.2 MI S/O SR 76
RouteCounty Highway 0
Coordinates33.36093, -117.06234
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating58.5 US tons
Inventory rating35.1 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans2
Design loadHS 20 + Mod
Structure length120 ft (36.6 m)
Longest span60 ft (18.2 m)
Deck width25 ft (7.6 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic434 (2021)
Projected traffic630 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Lilac Road over San Luis Rey River built?

It was built in 1993, making it 32 years old in 2025.

What condition is Lilac Road over San Luis Rey River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does Lilac Road over San Luis Rey River carry?

About 434 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is Lilac Road over San Luis Rey River?

The structure is 120 ft (36.6 m) long with a longest span of 60 ft (18.2 m) and a deck 25 ft wide.

Who owns Lilac Road over San Luis Rey River?

It is owned by the County Highway Agency.