PROJ02037

• Contract/PO #: PO 060000000018
• Contractor Name: Orchard Mesa Irrigation District
• Contract Type: Grant
• Water District: 0
• Loan Projects - Doc Type: Feasibility Study

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CONTENTS
Page
EXECUTIVE SUMMARY i
1 INTRODUCTION 1
1.1 Purpose of study 1
1.2 Site description 2
2 TASK 1 RESUL TS - ORCHARD MESA POWER CANAL
ENLARGEMENT STUDY 3
2.1 Costs of increasing power canal capacity to 860 cfs 3
2.2 Benefits of increasing power canal capacity to 860 cfs 5
2.2.1 Hydropower generation benefit 6
2.2.2 Crop production benefit 7
2.2.3 Water-right maintenance benefit 7
2.3 Benefit/Cost analysis 7
3 TASK 2 RESULTS - ORCHARD MESA POWER CANAL
OVERTOPPING STUDY 9
3.1 Objective and background 9
3.2 Alternative solutions 9
3.2.1 Option 1 - Rapid Creek overflow weir 9
3.2.2 Option 2 - I nterceptor channels 10
3.2.3 Option 3 - Orchard Mesa Power Canal cap 10
3.2.4 Other solutions 11
4 TASK 5 RESULTS - STOKES GULCH INVERTED SIPHON
REPLACEMENT STUDY 12
4.1 Objective and background 12
4.2 Replacement alternatives 12
4.2.1 Pre-cast replacement option 12
4.2.2 Cast-in-place option 13
5 REFERENCES 14

2616-R1

Orchard Mesa Irrigation District

Water Management Consultants