US Bridges

Magic Mountain Pkw over South Fk Santa Clara Riv

Fair

Los Angeles County, California · 876 Ft W/O Bouquet Cyn RD · Structure no. 53C2316

Built
1995
30 years old
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
458 ft
3 main spans
Daily traffic
37,000
2014 count
Owner
City
City or Municipal Highway Agency

About this bridge

Magic Mountain Pkw over South Fk Santa Clara Riv is a prestressed concrete continuous box beam or girders - single or spread carrying Magic Mountain Pkw over South Fk Santa Clara Riv in Los Angeles County, California. It was built in 1995, so it is 30 years old, younger 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 37,000 vehicles a day, roughly 5% of them trucks, projected to reach 65,097 by 2043. The structure is 458 ft (139.6 m) long and 96 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMagic Mountain Pkw
CrossesSouth Fk Santa Clara Riv
Location876 Ft W/O Bouquet Cyn RD
RouteCity Street 0
CountyLos Angeles County
StateCalifornia
Coordinates34.41427, -118.54332
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 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 rating91.4 US tons
Inventory rating54.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length458 ft (139.6 m)
Longest span180 ft (54.9 m)
Deck width96 ft (29.2 m)
Roadway width84 ft (25.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,000 (2014)
Projected traffic65,097 by 2043
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 Magic Mountain Pkw over South Fk Santa Clara Riv built?

It was built in 1995, making it 30 years old in 2025.

What condition is Magic Mountain Pkw over South Fk Santa Clara Riv 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 September 2023.

How much traffic does Magic Mountain Pkw over South Fk Santa Clara Riv carry?

About 37,000 vehicles per day (2014 count), of which roughly 5% are trucks.

How long is Magic Mountain Pkw over South Fk Santa Clara Riv?

The structure is 458 ft (139.6 m) long with a longest span of 180 ft (54.9 m) and a deck 96 ft wide.

Who owns Magic Mountain Pkw over South Fk Santa Clara Riv?

It is owned by the City or Municipal Highway Agency.