TOWN OF FIRESTONE RAW WATER IRRIGATION SYSTEM MASTER PLAN MARCH 2010 COLORADO CIVIL GROUP, INC. Raw Water Irrigation System Master Plan March 2010 Table of Contents 1 Introduction ............................................................................................................................................................................................. 1 1.1 Project Goals ................................................................................................................................................................................... 1 1.2 Scope of Work ................................................................................................................................................................................ 1 1.2.1 Existing Master Plan Evaluation ............................................................................................................... 1 1.2.2 Identifying Potential Areas for Raw Water Irrigation ............................................................................... 1 1.2.3 Irrigation Ditch Evaluation ........................................................................................................................ 1 1.2.4 Hydraulic Analysis and Calculations ......................................................................................................... 2 1.2.5 Raw Water System Modeling ................................................................................................................... 2 1.2.6 Raw Water Irrigation System Master Plan ............................................................................................... 2 1.3 Existing Studies/Reports .......................................................................................................................................................... 2 1.3.1 2003 Water Master Plan (2003 WMP) ..................................................................................................... 2 1.3.2 Raw Water Master Plan (RWMP, 2007) ................................................................................................... 2 1.3.3 Vogl Land – North Parcel Irrigation Report (VL‐NPIR, 2005) .................................................................... 3 1.3.4 Town of Firestone Central Park Infrastructure Master Plan (CPIMP, 2006) ............................................ 3 1.4 Candidate Areas for Irrigation ................................................................................................................................................ 3 1.4.1 Town of Firestone Public Parks ................................................................................................................ 4 1.4.2 Home Owner’s Association (HOA) Parks .................................................................................................. 4 1.4.3 Excluded Parks .......................................................................................................................................... 4 1.5 Irrigated Areas .............................................................................................................................................................................. 8 1.6 Irrigation Requirements............................................................................................................................................................ 8 1.6.1 Irrigation Demands ................................................................................................................................. 10 2 Potential Raw Water Irrigation Sources .................................................................................................................................... 11 2.1 Delivery Capabilities and Locations ................................................................................................................................... 11 2.1.1 Coal Ridge Ditch ...................................................................................................................................... 11 2.1.2 Highland Southside (Godding) Ditch ...................................................................................................... 12 2.1.3 Lower Boulder Ditch ............................................................................................................................... 12 2.1.4 Rural Ditch .............................................................................................................................................. 13 2.2 Irrigation Ditch Summary ....................................................................................................................................................... 13 2.3 Irrigation Ditch Water Rights Issues .................................................................................................................................. 14 3 Evaluate Potential Storage Reservoirs ........................................................................................................................................ 17 3.1 General Information .................................................................................................................................................................. 17 3.2 Firestone Central Park Storage Reservoir ....................................................................................................................... 17 3.2.1 Location and Preliminary Configuration ................................................................................................. 17 3.2.2 Storage Volume Calculations .................................................................................................................. 19 3.2.3 Raw Water Acquisition Opinion of Cost ................................................................................................. 20 i Raw Water Irrigation System Master Plan March 2010 3.3 Vogl North Subdivision Storage Reservoir ...................................................................................................................... 21 3.4 Gravel Pit Storage Reservoirs ............................................................................................................................................... 21 4 Raw Water System Transfer Designs .......................................................................................................................................... 23 4.1 Transfer Pump Station Evaluation (Vogl) ........................................................................................................................ 23 4.2 Transfer Pump Station Evaluation (Public Works Facility) ..................................................................................... 24 4.3 Transfer System Design Criteria .......................................................................................................................................... 25 4.4 Transfer System Opinions of Cost ....................................................................................................................................... 28 5 Raw Water Distribution System Design ..................................................................................................................................... 30 5.1 Distribution System Alignment Evaluation ..................................................................................................................... 30 5.2 Pump and Distribution System Modeling ........................................................................................................................ 30 5.2.1 Average Year Scenario ............................................................................................................................ 34 5.2.2 Drought Year Scenario ............................................................................................................................ 34 5.3 Pump Station Configuration and Sizing ............................................................................................................................ 34 5.4 Intake Structure Evaluation ................................................................................................................................................... 35 5.5 Distribution System Design Criteria ................................................................................................................................... 35 5.6 Distribution System Opinions of Cost ................................................................................................................................ 36 5.7 Alternative Irrigation Supply ................................................................................................................................................ 39 6 Overall Project Opinion of Cost ...................................................................................................................................................... 40 6.1 Annual Operation & Maintenance Expenses ................................................................................................................... 40 7 References .............................................................................................................................................................................................. 41 Appendix A: Park Information ..................................................................................................................................................................