WSP03780

• File Number: 8040.960
• Description: Section D General Studies - Dams
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 4/14/2003
• Author: Denver Water
• Title: Williams Fork Hydroelectric Project - FERC Number 2204 - Initial Information Package - IIP - For the Relicensing of the Williams Fork Reservoir Hydroelectric Project
• Water Supply Pro - Doc Type: Report/Study

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Initial Information Package
Williams Fork Hydroelectric Project
FERC Project No. 2204

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TABLE OF CONTENTS

1.0 INTRODUCTION .............................................................................................................1
1.1 Denver Water I
1.2 Licensing I
1.3 History of the Williams Fork Reservoir Hydroelectric Project 5
2.0 GENERAL DESCRIPTION OF THE PROJECT SETTING...................................... 8
2.1 Location 8
2.2 Drainage Basin 8
2.3 Watershed Description 8
2.4 Climate 9
3.0 GENERAL ENGINEERING DESIGN .........................................................................11
3.1 Detailed Description II
3.1.1 Structures II
3.2 Project Operation 18
3.2.1 Hydroelectric Operations 18
3.3 Construction History 19

4.0 PROJECT OPERA TION ...............................................................................................31
4.1 Colorado Water Rights 31
4.2 Williams Fork Reservoir Water Rights 31
4.3 Water Supply Considerations 32
4.4 General Description of Williams Fork Reservoir 34
4.5 Williams Fork Power Plant 35
4.6 Williams Fork Reservoir Operations 36
4.7 Historical Operational Hydrology Data 37

5.0 ENVIRONMENTAL REPORT .....................................................................................42
5.1 Environmental Resources 42
5. I.I General Description of the Project Setting 42
5.2 Wetlands and Riparian Resources 43
5.2.1 Study Area Boundary 43
5.2.2 Data Sources 43
5.2.3 Existing Environment 43
5.2.4 Description of Any Proposed Studies and the Proposed Methodologies to be
Employed 44
5.2.5 Proposed Environmental Protection. Mitigation and Enhancement Measures
to the Extent Known at This Time 44
5.3 Vegetation 44
5.3.1 Study Area Boundary 44
5.3.2 Data Sources 44
5.3.3 Existing Environment 44
5.3.4 Description of Any Proposed Studies and the Proposed Methodologies to be
Employed 46
5.3.5 Proposed Environmental Protection, Mitigation and Enhancement Measures
to the Extent Known at This Time 46
5.4 Fisheries Resources 46
5.4.1 Study Area Boundary 46
5.4.2 Data Sources 46
5.4.3 Existing Environment 47

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