WSP10536

• File Number: 8200.760
• Description: Yampa River General
• State: CO
• 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 - Beginning to Chapter 3
• Water Supply Pro - Doc Type: Report/Study

T ABLE OF CONTENTS

Pa~e No.

3.10.3 East Route ....... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-94
3.10.3.1 Location and Ownership ........................ 3-94
3.10.3.2 Road Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-95
3.10.3.3 Traffic Loads ................................ 3-95
3.10.3.4 Proximity to Streams. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-95
3.10.3.5 Road Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-95
3.10.4 On-Site Roads. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-95
3.10.4.1 Existing Site Roads ............................ 3-95
3.10.4.2 Road Corridor Options. . . . . . . . . . . . . . . . . . . . . . . . . 3-98
3.11 VISUAL RESOURCES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-98
3.11.1 Introduction....................................... 3-98
3.11.2 Project Site Visibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-98
3.11.3 Existing Visual Condition ............................. 3-99
3.11.3.1 Viewpoint Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-99
3.11.3.2 Landscape Description ......................... 3-99
3.11.4 Sensitivity ....................................... 3-100
3.11.5 Forest Service Management Direction .................... 3-102
.3.11.5.1 Visual Quality Objectives ...................... 3-102
3.11.5.2 Existing Compliance with Objectives .............. 3-102
3.11.5.3 Visual Absorption Capability (V AC) ... . . . . . . . . ., 3-102
3.12 CULTURAL RESOURCES ................................ 3-103

3.12.1 Introduction...................................... 3-103
3.12.2 General Background ................................ 3-103
3.12.3 Results of Survey .................................. 3-104
3.12.3.1 Previous Site. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-104
3.12.3.2 Saddle Dam (ACZ-l) . . . . . . . . . . . . . . . . . . . . . . . . .. 3-104
3.12.3.3 Main Dam (ACZ-2) .......................... 3-105
3.12.3.4 ACZ-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-105
3.12.3.5 ACZ-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ., 3-105
3.12.4 Project Evaluation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-106

CHAPTER 4 - ENVIRONMENTAL CONSEQUENCES

4.1 INTRODUCTION......................................... 4-1
4.2 DAM SAFETY/FLOOD HAZARD............................ 4-1

4.2.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.2.2 Direct and Indirect Impacts ............................. 4-2
4.2.2.1 Alternative A - No Action. . . . . . . . . . . . . . . . . . . . . . . . 4-2
4.2.2.2 Alternative B - Proposed Reservoir Expansion . . . . . . . . . . 4-2
4.2.2.3 Alternative C - Smaller Reservoir Expansion .... . . . . . . . 4-4
4.2.2.4 Borrow Sites, Access Roads, and Power Supply ......... 4-5
4.2.3 Cumulative Impacts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
4.2.4 Mitigation and Enhancements Summary .................... 4-6
4.2.5 Unavoidable AdverseImpacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
4.3 WATER RESOURCES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
4.3.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

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Sep<<mber 1993