Interstate-19 East Frontage Rd: Canoa to Continental
This project included the construction of 4.5-miles of a two-lane frontage road along Interstate-19 (I-19) between Canoa Road and Continental Road in Green Valley, Arizona.
Major improvements included new frontage road bridge structures and an innovative braided ramp at the Continental Road interchange to create a single intersection of northbound I-19 access ramps, I-19 frontage road, and Continental Road.
The use of micropiles allowed Continental Road to be widened under the existing I-19 bridge while not adversely impacting and the existing structure and and/or traffic flows. Using a phased construction approach, the existing slope pavement was removed and replaced with concrete retaining walls.
Project Recognition/Awards:
- 2011 Number 2 – Top Ten Roads, presented by Roads & Bridges Magazine
- 2012 Public Works Project of the Year, presented by Arizona Chapter – American Public Works Association (APWA)
Project Details
Location: Green Valley, Pima County, Arizona
Initial Bid: $14.9 M
Construction Cost: $14.3 M
Owner: Pima County, Department of Transportation
Project Delivery: DBB
Scope: Four separate bridge structures including a braided ramp overpass onto I-19
Features
- 4 Bridge Structures
- Widening of Continental Road (under existing I-19 bridge)
- Grouted Micropiles
- 41,619 SF of Concrete Retaining Wall
- 60,100 CY of Excavation
- 13,443 CY of Borrow
- 19,027 CY of ABC
- 758 SY of PCCP
- 32,521 TONS OF AC
- 1,115 LF of 18″-66″ CMP
- 3,592 LF of 18″-48″ RCP
- 5 EA RCBC
- 39 Catch Basins
- 1,276 of 48″-60″ Drilled Shaft Foundation
- 11,555 LF of Concrete Curb
- 2,569 LF of Concrete Barrier
- 4,135 CY of Riprap
- 1,785 SY of Slope/Median Paving
- Traffic Signal
- Landscaping/Irrigation