I-10 Twin Peaks Traffic Interchange, Environmental Assessment

Affected Environment and Environmental Impacts October 2005
proximity impacts are so severe that the protected activities, features, or attributes
that qualify a resource for protection under Section 4(f) are substantially impaired.
Existing Conditions
Several existing or proposed Section 4(f) resources are located within the study
area. No wildlife and waterfowl refuge areas exist within the study area. Section
4(f) resources near the project area are shown on Figure 4-7.
Impacts
No Build Alternative
The no build alternative would not permanently incorporate, temporarily occupy,
or constructively use 4(f) resources; therefore the no build alternative would have
no impacts to Section 4(f) resources. The no build alternative would not improve
access to or connectivity between recreational facilities or provide increased
availability of bicycle or pedestrian facilities.
Preferred Alternative
Five Section 4(f) resources are located near the project area. Each of these
resources and the potential impacts to each of the resources are discussed in the
following paragraphs.
Twin Peaks Elementary School
Description of Resource: Twin Peaks Elementary School is a public school
managed by the Marana Unified School District. Twin Peaks Elementary’s
outdoor recreational facilities (approximately 6 acres) are used by the general
public outside school hours.
Use of 4(f) Resource: Twin Peaks Elementary is outside the area of construction
for the proposed improvements and no temporary use of the recreational facilities
would be required for construction purposes or temporary construction easements;
therefore, the preferred alternative would not permanently nor temporarily
incorporate any resources from this facility into a transportation facility. Although
noise levels at the facility would increase with the preferred alternative, the noise
analysis determined that the increase would not cause sound levels to exceed the
FHWA’s NAC (see Noise section, page 4-49); therefore, no constructive use of the
resource would occur. The preferred alternative would resurface Twin Peaks Road
adjacent to the school; therefore, access to the resource may be temporarily
impacted during this work. These temporary impacts would be minimized by a
traffic control plan; therefore, no use of the 4(f) property would occur. The
preferred alternative would improve overall access to this resource.
Interstate 10 Traffic Interchange at
Twin Peaks/Linda Vista
4-90
Project No.: NH-010-D (AIW)
TRACS No.: 10 PM 236 H5838 01D