US Bridges

Miller Avenue over San Dieguito R. Trib.

Good

San Diego County, California · 0.24MI N/O Felicita Road · Structure no. 57C0808M

Built
2010
15 years old, rebuilt 2022
Condition
Good
inspected May 2023
Type
Culvert
Concrete Continuous
Length
27 ft
4 main spans
Daily traffic
350
2016 count
Owner
County
County Highway Agency

About this bridge

Miller Avenue over San Dieguito R. Trib. is a concrete continuous culvert carrying Miller Avenue over San Dieguito R. Trib. in San Diego County, California. It was built in 2010 and reconstructed in 2022, so it is 15 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 350 vehicles a day, roughly 1% of them trucks, projected to reach 1,156 by 2045. The structure is 27 ft (8.2 m) long and 64 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesMiller Avenue
CrossesSan Dieguito R. Trib.
Location0.24MI N/O Felicita Road
RouteCounty Highway 0
Coordinates33.08526, -117.08168
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection9 ExcellentNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans4
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span6 ft (1.8 m)
Deck width64 ft (19.5 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2016)
Projected traffic1,156 by 2045
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

OwnerCounty Highway Agency
Maintained byCounty 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 Miller Avenue over San Dieguito R. Trib. built?

It was built in 2010, making it 15 years old in 2025. It was reconstructed in 2022.

What condition is Miller Avenue over San Dieguito R. Trib. 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 May 2023.

How much traffic does Miller Avenue over San Dieguito R. Trib. carry?

About 350 vehicles per day (2016 count), of which roughly 1% are trucks.

How long is Miller Avenue over San Dieguito R. Trib.?

The structure is 27 ft (8.2 m) long with a longest span of 6 ft (1.8 m) and a deck 64 ft wide.

Who owns Miller Avenue over San Dieguito R. Trib.?

It is owned by the County Highway Agency.