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Home » Santa Clarita News » Work To Begin On Magic Mountain Parkway I-5 Expansion Project

Work To Begin On Magic Mountain Parkway I-5 Expansion Project

Two-Year Project Will Focus on Highly Used Roads and Freeway Ramps.

For those who regularly travel the areas around Six Flags, Magic Mountain Parkway, the Valencia Industrial Center and The Old Road, the Expansion of Magic Mountain Parkway/I-5, including the freeway on/off ramps, will be welcome news indeed! A special groundbreaking event will be held for the Magic Mountain Parkway/I-5 Expansion Phase 2 project on Friday, June 16 at 11 a.m.  

The location for the event is on The Old Road, directly across the street from Hamburger Hamlet. The City of Santa Clarita, working in partnership with the County of Los Angeles, Caltrans, MTA/METRO and Newhall Land, will begin constructing this multi-million dollar project that will have a huge impact on traffic flow near the Valley’s major work centers. 

Completion of this project will help relieve existing and future traffic congestion, including measures to improve safety, increasing roadway capacity to meet future anticipated development and traffic growth. 

The road improvements include facilitating various utilities relocation by The Gas Company, Southern California Edison, AT&T, Exxon Mobil pipeline, Los Angeles County Sanitation District, Castaic Lake Water Agency, Valencia Water Company and other affected utility companies in the area of road improvements. 

There are 11 stages factored in to these improvements; the duration of each stage will range from 10 to 100 working days.  The goal of “stage construction” is to maintain a minimum of two traffic lanes in each direction throughout the entire construction duration on the mainline, ramps, and local streets.  Periods of short-term lane reductions to a single lane in each direction will be minimized and are anticipated to occur only during the transition period between stages.

This multi-faceted and complex project includes the reconstruction of the Interstate 5/Magic Mountain Parkway Interchange and the realignment of The Old Road. This includes reconstruction of all four-freeway ramps, widening of Magic Mountain Parkway from The Old Road to the proposed northbound ramps, necessary tapers on Magic Mountain Parkway to join existing, and realignment and widening of The Old Road from approximately 550 meters south of Magic Mountain Parkway to approximately 450 meters north of Magic Mountain Parkway. 

Realignment of The Old Road and Magic Mountain Parkway involves relocation of the Chevron gas station, to be performed by Newhall Land and is scheduled to be completed by early 2007, from its current location to a new location directly west where the new intersection will be located. 


During Magic Mountain Parkway/I-5 Phase 1, two bridges were replaced — at Magic Mountain Parkway and at the Santa Clara River — in preparation for additional improvements during Phase 2. The contractor, Security Paving, has 520 working days to complete the work and construction is anticipated to begin this summer.  It is estimated that construction will be completed by September 2008. 

The total cost for this project, including design, environmental work, property acquisition and construction is approximately $43.7 million which is primarily being paid for by the Valencia and the proposed Westside Bridge and Thoroughfare Districts through an advancement of funds from Newhall Land ($33.2 million).  The Valencia Bridge and Thoroughfare District is a joint District administered by the City of Santa Clarita and the County of Los Angeles.  The proposed Westside Bridge and Thoroughfare District will be administered by the County of Los Angeles.  The remaining funds for this highly anticipated project are coming from MTA/METRO ($10.5 million). “This project is another great example of a public/private partnership that will enhance the quality of life for all of the residents of our Valley.  We want to acknowledge our partners for contributing funding and design/permitting assistance for this much needed project,” commented Mayor Laurene Weste. 

A project of this magnitude is complex and can be disruptive.  We will be doing everything we can to make sure that traffic continues to flow, that access to area businesses is open and that we post adequate signs to direct people there.  If there are detours or lane closures, the City will be providing project signs in the area, as well as providing advance information via the media and technology,” she added.

For those who would like to be added to the City’s email blast list to receive information about the Magic Mountain/I-5 expansion project, that information is available at:  Click on the eNotify icon (lower left on homepage), follow the prompts to sign up to receive information via your email on the Magic Mountain/I-5 expansion project and major alerts that may occur with the project.

For more information, please contact the City’s Public Works Department at: 661-286-4172.

Work To Begin On Magic Mountain Parkway I-5 Expansion Project

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