US Bridges

47th ST over Chollas Creek

Fair

San Diego County, California · 0.3 MI S/O Market ST · Structure no. 57C0421

Built
1970
55 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete Continuous
Length
64 ft
6 main spans
Daily traffic
10,400
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

47th ST over Chollas Creek is a concrete continuous culvert carrying 47th ST over Chollas Creek in San Diego County, California. It was built in 1970, so it is 55 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 10,400 vehicles a day, roughly 2% of them trucks, projected to reach 10,924 by 2045. The structure is 64 ft (19.5 m) long and 71 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries47th ST
CrossesChollas Creek
Location0.3 MI S/O Market ST
RouteCity Street 0
Coordinates32.70703, -117.09366
Functional classUrban Minor Arterial

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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadH 15
Structure length64 ft (19.5 m)
Longest span10 ft (3 m)
Deck width71 ft (21.6 m)
Roadway width51 ft (15.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,400 (2023)
Projected traffic10,924 by 2045
Trucks2%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 47th ST over Chollas Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is 47th ST over Chollas 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 August 2023.

How much traffic does 47th ST over Chollas Creek carry?

About 10,400 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is 47th ST over Chollas Creek?

The structure is 64 ft (19.5 m) long with a longest span of 10 ft (3 m) and a deck 71 ft wide.

Who owns 47th ST over Chollas Creek?

It is owned by the City or Municipal Highway Agency.