This project consisted of study, design, and construction phases for a minor arterial roadway through a mixed commercial and residential corridor with heavy event, pedestrian, and commercial traffic. The project was successfully completed on a fast-track schedule and delivered in time for Super Bowl activities in 2015.
Dibble designed the West Segment of Sonoran Boulevard between 15th Avenue and 10th Street. The West Segment is approximately 2.1 miles and includes a 150-foot right-of-way, 64-foot roadway width, several drainage crossings, waterline relocation landscaping, and street lighting. Extensive coordination was required with the Arizona State Land Department, Salt River Project, property owners to the south, and the City Parks Department. The West Segment is one of three adjacent projects that provide an important east-west connection through north Phoenix and the Sonoran Preserve from 15th Avenue to Cave Creek Road (approximately 6.5 miles). The three projects were designed concurrently by three separate design teams, who coordinated closely to ensure consistent design and construction documents throughout the scenic corridor. The entire project received several awards, including: ACEC of Arizona: 2013 People's Choice Award, ACEC of Arizona: 2013 Merit Award in Transportation, ENR Southwest 2013 Award of Merit for Highway/Bridge, National APWA Project on the Year ($25M-$75M).
Dibble designed 10-miles of US 60 Grand Avenue, widening it to three lanes in each direction from SR 303L to 99th Avenue. The improvements increased the much needed capacity for this corridor, including new turn lanes at intersections. The project included extensive traffic control plans, retaining and noise walls, 18 new or modified traffic signals, FMS, lighting, storm drain, and utility relocations. Innovative and proactive approach incorporated design elements to best meet needs of users. This segment of US 60 is one of the primary urban arterial corridors serving the City of Surprise, City of El Mirage, Town of Youngtown, Maricopa County and the unincorporated communities of Sun City and Sun City West. All of these stakeholders provided project input, particularly for landscaping and aesthetics.
Dibble provided design and post-design services for two miles of 6-lane freeway, including two traffic interchanges at Bethany Home and Glendale Avenue with full access ramps. Design scope also included traffic signals, lighting, drainage, signing and marking, utilities, geotechnical engineering, traffic control, sound walls, and landscaping. Significant drainage design involved more than 85 inlets with collection lines and outlet to the regional flood control channel for the 10-year storm event. An offsite regional flood control concrete channel was designed to pass the 100-year, 24-hour existing condition flows with no freeboard and future conditions with freeboard. The channel design included varying channel drops as needed to optimize cost and effectiveness.
Dibble completed the design of over four miles of Ellsworth Loop Road. Originally designed as a by-pass route for trucks and commuter traffic, it provided access for proposed commercial developments. Most of the roadway was designed with six travel lanes and a raised median. The design required a major bridge structure to take Ellsworth Loop Road under the eisting Union Pacific Railroad track.