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I-10 Twin Peaks Traffic Interchange, Environmental Assessment

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Conclusion October 2005<br />

CHAPTER 6: CONCLUSION<br />

The environmental impacts of the preferred alternative and the no build alternative were<br />

evaluated based on both the context of the effects on the project area and the intensity or<br />

severity of impacts as defined in the CEQ Regulations. Table 6-1 summarizes the<br />

environmental impacts.<br />

Table 6-1. Summary of <strong>Environmental</strong> <strong>Assessment</strong><br />

<strong>Environmental</strong><br />

Result of No Build Result of Preferred<br />

Consideration<br />

Alternative evaluation Alternative evaluation<br />

Land use No impacts Short-term minor negative<br />

impacts<br />

Long-term minor negative<br />

Land resources<br />

• Topography<br />

• Soils<br />

• Geologic setting/<br />

mineral resources<br />

• Agriculture<br />

Water resources<br />

• Surface water<br />

• Ground water<br />

Water quality<br />

• Floodplains<br />

• Section 404/401<br />

• AZPDES/SWPPP<br />

• Sole source aquifer<br />

Biological resources<br />

• Wildlife<br />

• Threatened/<br />

endangered species<br />

• Arizona wildlife of<br />

concern<br />

• Critical habitat<br />

• Vegetation, riparian<br />

habitat, wetlands<br />

• Invasive species<br />

Interstate <strong>10</strong> <strong>Traffic</strong> <strong>Interchange</strong> at<br />

<strong>Twin</strong> <strong>Peaks</strong>/Linda Vista<br />

impacts<br />

No impacts Short-term minor negative<br />

impacts<br />

Long-term minor negative<br />

impacts<br />

Short-term moderate<br />

negative impacts<br />

Long-term moderate<br />

negative impacts<br />

Short-term minor negative<br />

impacts<br />

Long-term moderate<br />

beneficial impacts<br />

No impacts Short-term minor negative<br />

impacts<br />

No long-term negative<br />

impacts<br />

No impacts Short-term minor negative<br />

impacts<br />

No long-term negative<br />

impacts<br />

6-1<br />

Project No.: NH-0<strong>10</strong>-D (AIW)<br />

TRACS No.: <strong>10</strong> PM 236 H5838 01D

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