I-10 Twin Peaks Traffic Interchange, Environmental Assessment

Public Involvement/Project Coordination October 2005
Comment: Questions about phasing of construction (2 comment)
Response: It is likely that the project would be phased, but phasing would be developed
as a part of final design.
Comment: Question about estimated costs of the alternatives (2 comments)
Response: Planning level costs were developed for each of the alignment alternatives.
The center alignment was the lowest cost alternative.
Comment: Question about design features of I-10 on and off ramps (2 comments)
Response: I-10 ramp and frontage road improvements are discussed in Chapter 3,
Preferred Alternative, page 3-11.
Comment: Concerns/questions about changes in land uses/zoning (2 comments)
Response: This project proposes no changes to land use or zoning within the project
area. Although some changes in land use or zoning may occur, these changes would be
under authority of the Town of Marana or Pima County (near the proposed Twin Peaks
Road TI).
Comment: Expressed desire for decorative features for the improvements (2 comments)
Response: Preliminary recommendations have been made for project features and
amenities (see Chapter 4, Visual Resources, page 4-41), but most would be developed
during final design.
Comment: Concerns about increased traffic on Twin Peaks Road (2 comments)
Response: Because of the increase in traffic volumes predicted in the traffic report, a
number of improvements related to traffic signals, shared use paths, and other
improvements are proposed as a part of the preferred alternative (see Chapter 3,
Preferred Alternative, page 3-11).
Comment: Compliment on efforts to contact the public (1 comment)
Response: The project team appreciates the comment.
Comment: Question about maximum height of bridge for alternatives (1 comment)
Response: The bridges over the Santa Cruz River would be approximately 20 feet above
the low flow channel of the Santa Cruz River.
Comment: Save as much existing vegetation as possible (1 comment)
Response: Vegetation removal is proposed to be as little as needed to construct the
proposed improvements. For that vegetation that is removed, a revegetation plan would
be developed (see Chapter 4, Biological Resources, page 4-25).
Comment: Concerns about conflicts/coordination with other projects (1 comment)
Response: Relationships with other projects were considered and are addressed in
Chapter 2, Conformance with Regulations, Land Use Plans, and Other Plans, page 2-7.
Comment: Concerns about the expense of removing the former portion of El Camino de
Mañana (1 comment)
Interstate 10 Traffic Interchange at
Twin Peaks/Linda Vista
5-10
Project No.: NH-010-D (AIW)
TRACS No.: 10 PM 236 H5838 01D