US Bridges

Interstate 5 over Magic Mountain Parkway

Good

Los Angeles County, California · 07-LA-005-R53.33-SCTA · Structure no. 53 2928

Built
2005
20 years old
Condition
Good
inspected March 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
308 ft
4 main spans
Daily traffic
148,959
2018 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 over Magic Mountain Parkway is a prestressed concrete continuous box beam or girders - multiple carrying Interstate 5 over Magic Mountain Parkway in Los Angeles County, California. It was built in 2005, so it is 20 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 148,959 vehicles a day, roughly 13% of them trucks, projected to reach 232,441 by 2047. The structure is 308 ft (94 m) long and 155 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 5
CrossesMagic Mountain Parkway
Location07-LA-005-R53.33-SCTA
RouteInterstate 5
Coordinates34.42301, -118.58295
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length308 ft (94 m)
Longest span95 ft (29 m)
Deck width155 ft (47.2 m)
Roadway width150 ft (45.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic148,959 (2018)
Projected traffic232,441 by 2047
Trucks13%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Interstate 5 over Magic Mountain Parkway built?

It was built in 2005, making it 20 years old in 2025.

What condition is Interstate 5 over Magic Mountain Parkway 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 March 2025.

How much traffic does Interstate 5 over Magic Mountain Parkway carry?

About 148,959 vehicles per day (2018 count), of which roughly 13% are trucks.

How long is Interstate 5 over Magic Mountain Parkway?

The structure is 308 ft (94 m) long with a longest span of 95 ft (29 m) and a deck 155 ft wide.

Who owns Interstate 5 over Magic Mountain Parkway?

It is owned by the State Highway Agency.