US Bridges

Flowerwood Lane over Adler Creek

Good

San Diego County, California · 0.28 MI S/O Knottwood Wy · Structure no. 57C0873

Built
2010
15 years old
Condition
Good
inspected July 2021
Type
Arch - Deck
Concrete
Length
50 ft
1 main span
Daily traffic
500
2020 count
Owner
County
County Highway Agency

About this bridge

Flowerwood Lane over Adler Creek is a concrete arch - deck carrying Flowerwood Lane over Adler Creek in San Diego County, California. It was built in 2010, 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 500 vehicles a day, roughly 1% of them trucks, projected to reach 750 by 2042. The structure is 50 ft (15.2 m) long and 51 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesFlowerwood Lane
CrossesAdler Creek
Location0.28 MI S/O Knottwood Wy
RouteCity Street 0
Coordinates33.32088, -117.20193
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length50 ft (15.2 m)
Longest span48 ft (14.6 m)
Deck width51 ft (15.4 m)
Roadway width51 ft (15.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2020)
Projected traffic750 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Flowerwood Lane over Adler Creek built?

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

What condition is Flowerwood Lane over Adler Creek 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 2021.

How much traffic does Flowerwood Lane over Adler Creek carry?

About 500 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Flowerwood Lane over Adler Creek?

The structure is 50 ft (15.2 m) long with a longest span of 48 ft (14.6 m) and a deck 51 ft wide.

Who owns Flowerwood Lane over Adler Creek?

It is owned by the County Highway Agency.