Lower South Platte River Study

• Contractor Name: Colorado Water Conservation Board
• Loan Projects - Doc Type: Feasibility Study

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Table of Contents
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IExecutive Summary 1
Section 1 - Introduction 1-1
I1.1 Study Objectives 1-1
1.2 Scope of Work 1-1
I 1.3 Study Procedures 1-2
1.4 Overview of Prior Investigations 1-4
1.5 Study Participants 1-4
I1.6 Acknowledgements 1-4
Section 2—Water Management in the Lower South Platte Basin 2-1
I 2.1 Current Surface Water Supplies and Uses 2-1
2.2 Current Groundwater Supplies and Uses 2-2
2.3 Benefits of New Storage Capacity 2-4
I 2.4 Water Available for Diversion and Storage 2-5
2.5 Storage Analyses 2-9
I Section 3 — Overview of Permitting Issues 3-1,
3.1 Federal Permits and NEPA 3-1
3.2 State Permits 3-6
3.3 Local Permits 3-7
3.4 Agency Consultations 3-7
3.5 Potentials for Avoiding Federal Permitting 3-7
I 3.6 Potential Legal Issues 3-8
3.7 Potential Land Ownership Issues 3-8
ISection 4— Identification of Potential Plan Elements 4-1
4.1 Inventory of Potential Storage Sites 4-1
4.1.1 Descriptions of the Storage Options 4-3
I4.1.2 Preliminary Cost Estimates for Storage Development 4-19
4.2 Reservoir Filling and Draining Options 4-21
4.2.1 North Side Reservoirs 4-22
I4.2.2 Julesburg Enlargement and Cottonwood Creek 4-23
4.2.3 South Side Reservoirs 4-23
4.2.4 Ring-Dike Sites 4-23
I4.2.5 Summary of Filling Options 4-24
4.3 Estimation of Pumping Requirements 4-24
4.4 Gravel Pit Water Storage 4-25
I4.5 Potential Non-Structural Measures 4-25
4.5.1 Re-operation of Existing Reservoirs 4-26
I4.5.2 Water Exchanges or Trades 4-26
GEI Consultants, Inc. i 01002 Dec 2001 Lower South Platte River Study