Water Efficiency Master Plan 2015 Utilities Department Water Resources Division Water Conservation Division FINAL July 21, 2015 REVISED FEBRUARY 2016 TOWN OF CASTLE ROCK WATER EFFICIENCY MASTER PLAN JULY 2015 – REVISED FEBRUARY 2016 Acronyms and Abbreviations AF acre-feet AF/yr acre-feet per year AWWA American Water Works Association cfs cubic feet per second Town Town of Castle Rock CWCB Colorado Water Conservation Board deg F degrees Fahrenheit gpcd gallons per capita per day gpd gallons per day gpm gallons per minute HOA Homeowner’s Association MG million gallons MGD million gallons per day PCWPF Plum Creek Water Purification Facility Plan Water Efficiency Master Plan sf square feet SFE Single Family Equivalent w/ with w/o without WISE Water Infrastructure and Supply Efficiency TOWN OF CASTLE ROCK WATER EFFICIENCY MASTER PLAN JULY 2015 – REVISED FEBRUARY 2016 Table of Contents Acknowledgments ................................................................................................. 1 Executive Summary .............................................................................................. 2 Introduction ........................................................................................................ 2 Profile ................................................................................................................ 4 Population .......................................................................................................... 5 Future Demand .................................................................................................. 5 Efficiency Goal ................................................................................................... 5 Stakeholder Participation ................................................................................... 5 New Programs/Policies ...................................................................................... 6 1.0 Profile of Existing Water Supply System ......................................................... 7 1.1 Overview .................................................................................................. 7 1.2 Water Supply and Reliability .................................................................... 9 1.3 Supply-Side Limitations and Future Needs ............................................ 13 2.0 Profile of Water Demands and Historical Demand Management .............. 15 2.1 Demographics and Service Area Characteristics ................................... 15 2.2 Historical Water Demands ..................................................................... 16 2.3 Past and Current Demand Management Activities ................................ 19 2.4 Demand Forecast ...................................................................................... 23 3.0 Integrated Planning and Water Efficiency Benefits and Goals ...................... 25 3.1 Water Efficiency and Water Supply Planning ......................................... 25 3.2 Water Efficiency Goals ........................................................................... 25 3.3 Water Efficiency Objectives and Implementation ................................... 26 3.4 Short-term Drought Response ............................................................... 28 4.0 Selection of Water Efficiency Activities ......................................................... 29 4.1 Summary of Selection Process .............................................................. 29 4.2 Components of Water Efficiency Plan.................................................... 29 4.2.1 Foundational Activities .................................................................... 30 4.2.2 Targeted Technical Assistance and Incentives ............................... 33 i TOWN OF CASTLE ROCK WATER EFFICIENCY MASTER PLAN JULY 2015 – REVISED FEBRUARY 2016 4.2.3 Ordinances and Regulations ........................................................... 34 4.2.4 Educational Activities ...................................................................... 36 5.0 Implementation and Monitoring Plan ............................................................. 41 5.1 Implementation Plan .............................................................................. 41 5.1.1 Community Outreach ...................................................................... 41 5.1.2 Implementation ................................................................................ 42 5.2 Monitoring Plan ...................................................................................... 43 6.0 Adoption, Public Review, and Approval of Water Efficiency Master Plan ..... 44 6.1 Water Efficiency Master Plan Adoption .................................................. 44 6.2 Public Review Process .......................................................................... 44 6.3 Efficiency Plan Approval ........................................................................ 47 6.3.1 Local Approval ................................................................................ 47 6.3.2 CWCB Approval .............................................................................. 47 6.4 Water Efficiency Master Plan Review and Update ................................. 48 7.0 References ................................................................................................... 49 Appendix A – Population and Growth Projections .............................................. 50 Appendix B - Castle Rock Water’s Utility Rate Structure Summary .................... 51 Appendix C - Castle Rock Municipal Code ......................................................... 60 Appendix D – Colorado Water Conservation Board Review Comments ............. 61 Appendix E – Public Comments.......................................................................... 65 Appendix F – Focus Group Summary ................................................................. 68 Appendix G – Online Survey Summary .............................................................. 86 ii TOWN OF CASTLE ROCK WATER EFFICIENCY MASTER PLAN JULY 2015 – REVISED FEBRUARY 2016 List of Tables Table 1: Castle Rock’s Projected Future Water Supply Table 2: Water Supply Limitations and Future Needs (based on Worksheet A from CWCB guidance document) Table 3: Historic Average Water Demand and Percentage by Customer Category, 2010-2014 Table 4: Water Efficiency Activities Table 5: Estimated Water Savings, 2010-2014 Table 6: Plan Components by Customer Class Table 7: Water Efficiency Activity Implementation Schedule List of Figures Figure 1: Long-Term Water Puzzle Figure 2: Town of Castle Rock Service Area Figure 3: Denver Basin Geologic Formation Figure 4: Pie Chart of 5-year Average of Historic Water Demands by Category, 2010-2014 Figure 5: Town of Castle Rock Metered Water, 2010-2014 Figure 6: 5-year Monthly Average Water Consumption by Category, 2010- 2014 Figure 7: Peak Day Demand Related to Every Third Day Water Restrictions Implementation Figure 8: 5-year Average Consumption versus Average Temperature Figure 9: Demand Forecast iii TOWN OF CASTLE ROCK WATER EFFICIENCY MASTER PLAN JULY 2015 – REVISED FEBRUARY 2016 Acknowledgments The development of the Town of Castle Rock Water Efficiency Master Plan was a collaborative effort led by the Water Resources and Water Conservation Divisions at the Town of Castle Rock. The following staff members made significant contributions of time and input on this document: Mark Marlowe, PE, Utilities Director Matt Benak, PE, Water Resources Manager Sheri Scott, PE, Water Resources Program Analyst Rick Schultz, Water Conservation Specialist Matthew Hayes, PE, CIP Project Manager Carolyn Richards, Administrative Assistant Karen Carter, Community Relations Manager KerriAnne Mukhopadhyay, Community Relations Specialist PAGE 1 TOWN OF CASTLE ROCK WATER EFFICIENCY MASTER PLAN JULY 2015 – REVISED FEBRUARY 2016 Executive Summary Introduction Colorado Water Conservation Board (CWCB) through the Office of Water Conservation and Drought Planning requires that water providers with total demand of 2,000 acre-feet per year (AF/yr) or more develop and implement plans that encourage customers to use water efficiently. This requirement was first established through the Water Conservation Act of 1991. During the 2004 legislative session, the State of Colorado revised the minimum requirements of the Water Conservation Act of 1991 in House Bill 04-1365. This House Bill now requires the conservation plans to include the following information: The steps the covered entity used to develop, and will use to implement, monitor, review and revise its water conservation plan; The time period, not to exceed seven years, after which the covered entity will review and update its adopted plan; and Either as a percentage or in acre-foot increments, an estimate of the amount of water that has been saved through a previously implemented conservation plan and an estimate of the amount of water that will be saved through conservation when the plan is implemented. The April 1992 Water Resources Management Plan outlined conservation as a viable method to extending water supply. In June 1996, the Town of Castle Rock adopted a water conservation plan that set water conservation goals for the community. In December 2006, the Town of Castle Rock adopted the 2006 Water Conservation Master Plan. Numerous factors require the plan to be updated including: CWCB’s efforts in developing and implementing the Colorado Water Supply Plan; The projected population