Phoenix interchange project underway
Construction has started on the $73 million Fern Valley Interchange project in Phoenix.
Prime contractor Hamilton Construction of Springfield is on site at the Interstate 5 exit 24 interchange. The project slated to run through September 2016.
“We’ll be on site keeping folks informed though out the project and if they have questions or concerns, they can call us,” said ODOT Public Service Representative Dennis Steers.
Key milestones this winter and spring include:
- Beginning work on the new roadways on the east side of the interstate
- Meeting a 25 day deadline from beginning to end before Memorial Day to install a four foot pipe across both lanes of I-5 north of the interchange, and;
- Beginning construction on temporary southbound on and off ramps in the southwest interchange quadrant near Luman Road.
ODOT also has a project office at the Shoppes at Exit 24.
Project staging will try to lessen construction-related impacts to the driving public and adjacent businesses. However, there will be short delays and detours during the project. Temporary on and off ramps will be constructed at the interchange. This will keep traffic moving while allowing the contractor the widest area possible to build the improvements.
The project’s design phase began 10 years ago and was developed with the help of a Phoenix Citizens Advisory Committee and Project Development Team.
When complete, exit 24 will feature Oregon’s first Diverging Diamond Interchange. It has a narrower footprint than a typical diamond interchange, which saves on right of way costs and allows construction where development is close to the interchange ramps. It also moves traffic safely and efficiently.
ODOT offers you more than 50 specialized email alerts, including updates on the Fern Valley Interchange.
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Phoenix City Council - Aug 19, 2013 Final.pdf
Aesthetic Design links:
Fern Valley Interchange Bridge and I-5
View from Greenway to Fern Valley Road
The Federal Highway Administration approved its Finding of No Significant Impact (FONSI) for the Fern Valley Interchange project last year. This action follows release of the Environmental Assessment in the winter of 2010 after six years of project development. A local team, with the help of landscape architect developed aesthetic features for the two bridges in the interchange area taking into account the local landscape and the influence of the pear growing industry.
The Environmental Assessment findings and supporting documents are linked below.
Click here to see the latest overall design file
Click here to see the Fern Valley Interchange Environmental Assessment
Signed FONSI - June 30, 2011
Final FONSI - September 6, 2011
The Fern Valley Interchange, located at Interstate 5 exit 24, experiences traffic congestion throughout the day, especially during the morning and afternoon commute. New and proposed development on the east side of I-5, as well as development growth within the Rogue Valley, are choking the interchange's capacity and causing safety concerns.
The $73 million project is scheduled to begin construction in 2013. The Fern Valley interchange is expected to be constructed using a 'crossing' or 'diverging diamond' design that provides a higher capacity to move traffic while requiring lower right-of-way needs.
The Missouri Department of Transportation was the first agency to construct a diverging diamond interchange in the United States. This interchange design can be constructed for a relatively smaller price tag than more conventional designs, and is safer because there are fewer conflicting moves. Vehicles crossing the interchange move to the opposite side of the road to either enter I-5 or to cross it, reducing the number of traffic signal cycles for traffic to clear.
Project design background
project's design phase started in 2004 and went through a major overhaul in
2006 when local opposition rose against plans to widen Highway 99 in Phoenix.
The "Fern Valley Through" design alternative was eliminated late last
year, on the counsel of the Department of Justice, because it would have an
adverse impact on nearby farm land.
Fern Valley Interchange Timeline
October 2010 Environmental Assessment published
February 2011 PDT recommends Build Alternative
City of Phoenix Approves IAMP
June 2011 Federal Highway signs the FONSI
October 2013 Project goes to Contract
Early 2014 Construction Begins
2016 Construction Complete