ADOT State Route 101 Loop, AZ
Ninyo & Moore, a SOCOTEC Company, provided geotechnical engineering, construction materials testing, and post-design engineering services for the Arizona Department of Transportation’s State Route 101 Loop (SR 101) improvement project, a major infrastructure upgrade spanning a 14-mile corridor through Phoenix and Scottsdale, Arizona.
Key Information
Project Name: Arizona Department of Transportation State Route 101 Loop (SR 101 Loop), I-17 to Pima Road
Client: Arizona Department of Transportation c/o T.Y. Lin, Coffman Specialties, and Ames Construction Joint Venture
Location: Phoenix and Scottsdale, Arizona
Services Provided: Geotechnical Engineering, Construction Materials Testing and Geophysical
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The Challenge
Expanding Capacity on a Critical Transportation Corridor
As one of the region’s most heavily traveled transportation corridors, the SR 101 Loop plays a vital role in connecting communities, businesses, and commuters throughout the northern reaches of the Phoenix metropolitan area.
To accommodate growing traffic demands and improve mobility and safety, the Arizona Department of Transportation initiated a major infrastructure improvement program along a 14-mile segment of this corridor between Interstate 17 and Pima Road.
The project included:
14 miles of new general-purpose lanes in both directions
14 bridge widenings
3.5 miles of retaining walls and sound walls
New pavement and structural improvements
Drainage, signage, pavement markings, and street lighting upgrades
Traffic signal and Intelligent Transportation Systems (ITS) improvements
Utility relocations and landscape restoration activities
To accelerate project delivery, the owner selected a Design-Build (D/B) delivery method, requiring close coordination among engineering, construction, and specialty consulting teams.
The Solution
Geotechnical Engineering and Construction Support Services
Ninyo & Moore, a SOCOTEC Company, provided geotechnical engineering, construction materials testing, and post-design engineering services for the SR 101 Loop improvement project.
Geotechnical engineering
Our geotechnical services included background review; utility locating; subsurface explorations; in-house laboratory testing and preparation of multiple technical memorandums presenting our geotechnical findings and recommendations.
Geophysical services
Our geophysical services included conducting a ground penetrating radar (GPR) survey at the surface of the approach and anchor slabs to better delineate the lateral extend of potential air voids located below the slabs; reviewing and compiling the data collected from the GPR survey; and exhibit presenting our results.
Construction materials testing
Our construction materials testing services included observation, testing, and sampling during the placement of soil, aggregate, concrete, and asphalt; in-house laboratory testing of soil, aggregate, concrete, and asphalt materials within an on-site mobile laboratory; and project management, data processing, and report review services of field and laboratory testing reports.
Post-design engineering support
Working as part of the larger project team, our professionals delivered the technical expertise needed to support the design and construction of roadway, bridge, retaining wall, and related infrastructure improvements.
The project's design-build delivery model demanded collaboration across multiple disciplines and stakeholders.
Ninyo & Moore, a SOCOTEC Company, provided geotechnical engineering, construction materials testing, and post-design engineering services for the SR 101 Loop improvement project.
Geotechnical engineering
Our geotechnical services included background review; utility locating; subsurface explorations; in-house laboratory testing and preparation of multiple technical memorandums presenting our geotechnical findings and recommendations.
Geophysical services
Our geophysical services included conducting a ground penetrating radar (GPR) survey at the surface of the approach and anchor slabs to better delineate the lateral extend of potential air voids located below the slabs; reviewing and compiling the data collected from the GPR survey; and exhibit presenting our results.
Construction materials testing
Our construction materials testing services included observation, testing, and sampling during the placement of soil, aggregate, concrete, and asphalt; in-house laboratory testing of soil, aggregate, concrete, and asphalt materials within an on-site mobile laboratory; and project management, data processing, and report review services of field and laboratory testing reports.
Post-design engineering support
Working as part of the larger project team, our professionals delivered the technical expertise needed to support the design and construction of roadway, bridge, retaining wall, and related infrastructure improvements.
The project's design-build delivery model demanded collaboration across multiple disciplines and stakeholders.
The Results
Supporting a Major Transportation Improvement Project
The SR 101 Loop improvements delivered a modernized transportation corridor in the Phoenix metropolitan area that was on time and within budget.
The project included delivery of planned travel lanes, bridge widenings, retaining and sound walls, roadway infrastructure upgrades, and utility relocations.
