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airport/documents/Mesquite Master Plan Final.pdf - The City of ...

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TABLE A (Continued)<br />

Environmental Evaluation<br />

Environmental Resource Potential Resource Impacts<br />

Floodplains. Significant impacts to<br />

floodplains occur when a proposed action<br />

results in notable adverse impacts on<br />

natural and beneficial 100-year floodplain<br />

values.<br />

Hazardous Materials, Pollution<br />

Prevention, and Solid Waste. <strong>The</strong> <strong>airport</strong><br />

must comply with applicable pollution<br />

control statutes and requirements. Impacts<br />

may occur when changes to the quantity or<br />

type <strong>of</strong> solid waste generated, or type <strong>of</strong><br />

disposal, differ greatly from existing<br />

conditions.<br />

B-6<br />

• According to the Federal Emergency<br />

Management Agency (FEMA) Federal<br />

Insurance Rate Maps dated August 28,<br />

2001, the <strong>airport</strong> is located in a Zone X.<br />

This zone represents an area <strong>of</strong> 500-year<br />

flood; areas <strong>of</strong> 100-year flood with<br />

average depths <strong>of</strong> less than one foot or<br />

with drainage less than one mile; and<br />

areas protected by levees from a 100year<br />

flood.<br />

• As mentioned previously, the East Fork<br />

<strong>of</strong> the Trinity River is located<br />

approximately one-mile east <strong>of</strong> the<br />

<strong>airport</strong>. <strong>The</strong> 100-year floodplain<br />

associated with the river remains just<br />

east <strong>of</strong> the Dallas-Kauffman County<br />

line, east <strong>of</strong> the <strong>airport</strong>. Additionally, a<br />

100-year floodplain associated with the<br />

North <strong>Mesquite</strong> Creek, a tributary to<br />

the East Fork Trinity River, is located<br />

approximately one mile west and<br />

southwest <strong>of</strong> the <strong>airport</strong>.<br />

• No impacts to floodplains are<br />

anticipated as no proposed<br />

improvements are planned to be<br />

constructed within the previously<br />

•<br />

outlined floodplain areas.<br />

<strong>The</strong> <strong>airport</strong> will need to continue to<br />

comply with a National Pollution<br />

Discharge Elimination System (NPDES)<br />

permit, which will ensure that pollution<br />

control measures are in place at the<br />

<strong>airport</strong>.<br />

As development occurs at the <strong>airport</strong>,<br />

the permit will need to be modified to<br />

reflect the additional impervious<br />

surfaces and stormwater retention<br />

facilities. <strong>The</strong> addition and removal <strong>of</strong><br />

impervious surfaces may require<br />

•<br />

modifications to this permit should<br />

drainage patterns be modified.<br />

As a result <strong>of</strong> increased operations at<br />

the <strong>airport</strong>, solid waste will slightly<br />

increase; however, these increases are<br />

not anticipated to be significant.

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