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Section 5 Formulation of Alternative Plans

EAA Storage Reservoirs Revised Draft PIR and EIS February 2006

5-32

TABLE 5-11: EFFECTS EVALUATION: CATEGORIES OF NATURAL AND CULTURAL RESOURCES EFFECTS

Categories of

Effects

Existing Condition

Alternative 1

“No Action”

(Future without

project)

Alternative 2

360k ac-ft

reservoir with 6’

max depth

Alternative 3

360k ac-ft

reservoir with 10’

max depth

Alternative 4

360k ac-ft

reservoir with 12’

max depth

(Earthen)—

Selected

Alternative Plan

Alternative 5

360k ac-ft

reservoir with 12’

max depth (RCC)

Alternative 6

360k ac-ft

reservoir with 14’

max depth

Soils (Prime

and Unique

Farmland)

0 acres 0 acres 62,000 acres 38,000 acres 32,000 acres 32,000 acres 26,500 acres

Groundwater Good

Slight effect;

increasing

population may

decrease surficial

aquifer

Minor benefit Minor benefit

Minor benefit—

may provide

additional source

of recharge

Minor benefit—

may provide

additional source

of recharge

Minor benefit—

may provide

additional source

of recharge

Air Quality Good Good

Minor adverse

effects from

pumps

Minor adverse

effects from

pumps

Minor adverse

effects from

pumps

Minor adverse

effects from

pumps

Minor adverse

effects from

pumps

Noise

Low noise (34-55

decibels)

No change

Temporary rise in

noise levels from

construction

Temporary rise in

noise levels from

construction

Temporary rise in

noise levels from

construction

Temporary rise in

noise levels from

construction

Temporary rise in

noise levels from

construction

Natural

wetlands

Pockets of remnant

wetlands; fair

quality, moderate

exotics

No change

359 acres of

existing wetlands

lost

220 acres existing

wetlands lost

206 acres existing

wetlands lost

206 acres existing

wetlands lost

206 acres existing

wetlands lost

Fish and

Wildlife

Habitat

Mostly agricultural

land; canals

provide aquatic

habitat

No change

~60,000 ac of

aquatic habitat;

seepage buffer

provides

wetland/upland

mosaic; earthen

levee provides

upland habitat

~37,000 ac of

aquatic habitat;

seepage buffer

provides

wetland/upland

mosaic; earthen

levee provides

upland habitat

~31,000 ac of

aquatic habitat;

seepage buffer

provides

wetland/upland

mosaic; earthen

levee provides

upland habitat

~31,000 ac of

aquatic habitat;

seepage buffer

provides

wetland/upland

mosaic; RCC

provides no habitat

~26,000 ac of

aquatic habitat;

seepage buffer

provides

wetland/upland

mosaic; earthen

levee provides

upland habitat

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