FLOOD02847

• County: Statewide
• Community: State
• Basin: Statewide
• Title: Metropolitan Water Supply Investigation Final Report
• Date: 1/1/1999
• Prepared For: CWCB
• Prepared By: Hydrosphere Resource Consultants, Inc.
• Floodplain - Doc Type: Flood Mitigation/Flood Warning/Watershed Restoration

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Metropolitan Water Supply Investigation

Table of Contents

3.1.4.5. Denver Basin (Nontributary) Groundwater ...................................................26

3.1.4.6. Water Conservation ....................................................................................... 26
3.1.5. Existing Conditions ....... ................... .... .... .... ......... ........................ ............ ........... 27
3.1.5.1. Denver Central Sub-Region...........................................................................27
3.1.5.2. South Metro Sub-Region............................................................................... 30

3.1.5.3. City of Aurora................................................................................................ 30
3.1.5.4. Northeast Metro Sub-Region......................................................................... 31
3.1.5.5. Northwest Metro Sub-Region........................................................................32

3.1.6. Future Conditions ................................................................................................. 32
3.1.6.1. Denver Central Sub-Region...........................................................................35
3.1.6.2. South Metro Sub-Region............................................................................... 36
3.1.6.3. City of Aurora................................................................................................36
3.1.6.4. Northeast Metro Sub-Region......................................................................... 36
3.1.6.5. Northwest Metro Sub-Region...............................................................;........37

3.2. Water Supply Opportunities .........................................................................................37

3.2.1. Conjunctive Use ...................................................................................................37
3.2.1.1. Background........... ..... ............................................................. ....................... 37
3.2.1.2. Conceptual Description of Conjunctive U5e ................................................. 39
3.2.1.3. Surface Water Availability ............................................................................ 40
3.2.1.4. Groundwater and Aquifer Availability.......................................................... 47
3.2.1.5. Analytical Approach...................................................................................... 52
3.2.1.6. Results of Conjunctive Use Investigations.................................................... 53

3.2.1.7. Issues and Concerns....................................................................................... 58
3.2.2. Effluent Management ................................................ ........................................... 66
3.2.2.1. Background.................................................................................................... 66
3.2.2.2. Conceptual Definitions .................................................................................. 67
3.2.2.3. Analytical Approach........... ........................................................................... 69
3.2.2.4. Results of Effluent Management Investigations............................................ 72

3.2.2.5. Issues and Concems.......................................................................................85
3.2.3. Interruptible Supply Arrangements with Agriculture........................................... 88

3.2.3.1. Background............................................................................. ....................... 88
3.2.3.2. Conceptual Definitions ...............~..................................... ... ... ....................... 88
3.2.3.3. Sources of Water Supplies.............................................................................93
3.2.3.4. Information Development....................................................... ....................... 93
3.2.3.5. PurchaseILeaseback Arrangements ............................................................... 97
3.2.3.6. Conditions for Successful Arrangements ...................................................... 97
3.2.3.7. Specific Contract Terms .............................................................................. 100
3.2.3.8. Other Contractual and Procedural Considerations ...................................... 101
3.2.3.9. Supply Source Considerations..................................................................... 102
3.2.3.10. Economic Considerations............................................................................ 102
3.2.3.11. South Platte River Basin Supply Potential.................................................. 104

3.2.3.12. Issues and Concerns...........................:.........................................................106
3.2.4. Systems Integration ............................................................................................108
3.2.4.1. Conceptual Definitions ...................................... .......................................... 108
3.2.4.2. Information Development............................................................................ 109
3.2.4.3. Systems Integration Study Results ..............................................................113

3.2.5. Chatfield Reservoir .......... ................................. .................................................. 120

Pn:pan:d for the Colondo Water Conservation Board. Colondo Department of Natural Resources by
Hydrosphen: Resource Consultants, 1002 Walnut Street, Suite 200, Boulder. CO 80302