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Section 7 Environmental Effects of the Selected Plan

EAA Storage Reservoirs Revised Draft PIR and EIS February 2006

7-4

7.5 AIR QUALITY

The operation of heavy equipment used for construction of the reservoir and

supporting facilities and the operation of pumps and other equipment associated

with the proposed action may have some impact upon the local air quality,

primarily in the form of elevated particulates, nitrogen oxides, and volatile

organic compounds. Reservoir pumps and associated equipment would be

generators.

The area is rural and the existing air quality is good to moderate. The

additional loading of engine gases should not substantially impact the quality of

the air in the region.

Every Federally funded project must be consistent with state plans for

implementing the provisions of the Clean Air Act Amendments (State

Implementation Plans). This project is in conformance with the State

Implementation Plan because it would not cause violations of the National

Ambient Air Quality Standards.

7.6 NOISE

The construction of the proposed reservoir and attendant structures will result

in a temporary increase in sound levels in the vicinity of active construction.

The operation of the pumps associated with the storage reservoir will increase

sound levels in their vicinity. Use of emergency generators will further elevate

the sound levels. The absence of a significant population minimizes the impacts

of these increases in sound levels. No significant impacts to wildlife have been

observed in the vicinity of other similar pump stations in the general area.

Minor impacts to noise quality are anticipated.

7.7 VEGETATION AND COVER TYPES

Most existing plant cover within the approximately 35,500 acre footprint for the

proposed alternative would be removed by the reservoir, canal and STA

construction. In general, construction will largely displace existing vegetation

communities with aquatic habitat (water-covered reservoir areas) or maintained

uplands (embankments, roads, berms). The majority of the land will be

water-covered to a depth of 12 feet. The reservoir will most closely resemble an

open-water lake community with significant differences. The reservoir will lack

much of a highly productive littoral zone because of the necessity to construct

relatively steep sides to maximize water storage capacity. Side slopes of the

earthen embankments are planned at a 3 to 1 ratio with riprap along the inside

slopes.

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Wenger 72944 Spezifikationen Seite 270