Silverbell Road - Ina to Grant Road

Maps & Reports

Preliminary Jurisdictional Determination Letter

Preliminary Jurisdictional Form

U.S. Army, Corps of Engineers Approved Jurisdictional Delineation - There are six sheets with aerial views:

June 16, 2014 – Public Art

June 16, 2014 – Landscape Concepts

May 23, 2013 – Landscape Concepts

PAG/RTA Value Analysis Study Final Report - November 2011 
(214 pages, full report)

Design Concept Study Final Report - June 2011 
(162 pages, full report)

Cultural Survey Report - June 2010
(79 pages, full report)

Traffic Report 
(300 pages, full report)

Traffic Report 
(60 pages, no appendicies)

Task Force Meeting Presentations and Materials:

Environmental Aspects

Environmental studies are an important part of the entire Silverbell Road project to identify existing conditions and any environmental constraints. A complete summary of the environmental findings can be found in the Environmental Design and Mitigation Report completed during the Design Concept phase of the project.

Environmental Design and Mitigation Report

The Sonoran Desert Conservation Plan

Wildlife Aspects

Silverbell Road (South) Wildlife Linkage Initial Assessment

Silverbell Road (North) Wildlife Linkage Initial Assessment

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Project Map

The Regional Transportation Authority is a state-established political subdivision within Pima County that collects a half-cent excise tax from the RTA’s special taxing district. The tax funds the RTA’s 20-year regional transportation plan, which voters in the district approved in May 2006 along with the excise tax. To date, the RTA has invested over $1 billion in the region to deliver transportation projects and services that improve our region’s mobility, safety, economic vitality and quality of life. The Silverbell Road project is part of the RTA plan and is managed by the City of Tucson in conjunction with the Town of Marana and Pima County. Please visit for more information.

For more information please contact: Nanette or Kathy
Silverbell Road Project c/o 100 N Stone Avenue, Ste. #450 Tucson, AZ 85701
Phone: (520) 885-9009 Email:

  • Regional Transportation Authority
  • City of Tucson
  • Marana
  • Pima County