WSP11724

• File Number: 8200.760
• Description: Yampa River General
• Basin: Yampa/White
• Water Division: 6
• Date: 9/1/1993
• Author: USDA Forest Service
• Title: Fish Creek Reservoir Expansion - Final Environmental Impact Statement - September 1993 - Chapters 4 to References
• Water Supply Pro - Doc Type: Report/Study

0028'71

CHAPTER 4. ENVIRONMENTAL CONSEQUENCES
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4.5.5 Unavoidable Adverse Impacts

Wetlands affected due to inundation or filling would be permanently lost as a result of the
implementation of either Alternative B or C. The wetland mitigation plan, when fully implemented,
would mitigate for this resource loss.

4.5.6 Irreversible and Irretrievable Commitment of Resources

Wetlands inundated or filled would be permanently lost under Alternatives B or C.

4.6 SOILS

4.6.1 Introduction

The following text presents a discussion of potential impacts of the alternatives to the soils resource.
The primary impacts that would occur include loss of soil productivity and an increase in the
potential for erosion. Impacts to vegetation productivity, directly related to impacts to soil
productivity, are treated in more detail in Section 4.7, Vegetation. Concerns related to potential
erosion hazards for the soils impacted, are presented in the text in conjunction with a discussion of
reclamation potentials.

Table 4-4, Soil Map Units Impacted, depicts the acreage of soil types to be directly affected by the
project alternatives.

TABLE 4-4
SOn. MAP UNITS IMPACTED BY ALTERNATIVE
Map Unit Numher
44 I 74 I 75 I 612C
ALTERNATIVES
Alternative A - No Action 0.0 0.0 0,0 0.0
Alternative 8 - Proposed Reservoir Expansion 7.0 0.0 5.6 38.8
Alternative C - Smaller Reservoir Expansion 5.9 0.0 5.9 22,9
BORROW AREAS
Borrow Arta A.I (Alternative B)* 0.0 0.0 8.8 27.4
Borrow Area A-I (Alternative q* 0.0 0.0 4.3 21.6
Borrow Arta A-2 0.5 0.0 0.0 2.5
Borrow Area B 8,4 13.5 0.0 1.5
CAMPGROUND RELOCATION SITE OPTIONS
Campgrnund Relocation Site 1 0.1 0,0 2.6 4.3
Campground Relocation Site 2 0.0 4.9 0.4 0.0
ROAD CORRIDOR OPTIONS
Road Option #1 0.3 0.9 0,0 0.2
Road Option #2 OJ 0,6 0.5 0.2
Road Option #3 OJ 0.2 0.7 0.4
POWERLINE 2.0 0.0 0,0 0.2
It Ac~age included in corresponding reservoir expansion shoreline inundation

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September 1993

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