US Bridges

15th ST over Newhall Crk

Good

Los Angeles County, California · 0.1MI W/O San Frndo RD · Structure no. 53C1544

Built
1978
47 years old
Condition
Good
inspected December 2021
Type
Culvert
Concrete
Length
38 ft
1 main span
Daily traffic
11,536
2014 count
Owner
City
City or Municipal Highway Agency

About this bridge

15th ST over Newhall Crk is a concrete culvert carrying 15th ST over Newhall Crk in Los Angeles County, California. It was built in 1978, so it is 47 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 11,536 vehicles a day, roughly 1% of them trucks, projected to reach 13,266 by 2042. The structure is 38 ft (11.5 m) long and 51 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Carries15th ST
CrossesNewhall Crk
Location0.1MI W/O San Frndo RD
RouteCity Street 0
Coordinates34.38769, -118.53501
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 inspectionDecember 2021
Inspection intervalevery 48 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 adequacy9: Superior 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
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length38 ft (11.5 m)
Longest span35 ft (10.7 m)
Deck width51 ft (15.6 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,536 (2014)
Projected traffic13,266 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

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 15th ST over Newhall Crk built?

It was built in 1978, making it 47 years old in 2025.

What condition is 15th ST over Newhall Crk 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 December 2021.

How much traffic does 15th ST over Newhall Crk carry?

About 11,536 vehicles per day (2014 count), of which roughly 1% are trucks.

How long is 15th ST over Newhall Crk?

The structure is 38 ft (11.5 m) long with a longest span of 35 ft (10.7 m) and a deck 51 ft wide.

Who owns 15th ST over Newhall Crk?

It is owned by the City or Municipal Highway Agency.