INTENTIONAL BLANK PAGE INTENTIONAL BLANK PAGE DELTA COUNTY COLORADO Delta County Multi-Jurisdictional Hazard Mitigation Plan (MJHMP) Delta County Multi-Jurisdictional Hazard Mitigation Plan Volume 2 Participating Jurisdiction/ Special District Annexes Contents MUNICIPAL ANNEXES ...................................................................................................................... 1-15 Section 1. CITY OF DELTA .............................................................................................................. 1-1 City of Delta Adoption Records (TO BE INCLUDED AFTER FEMA APPROVAL) ..................................................................... 1-3 1.1 Purpose .................................................................................................................................................................... 1-5 1.2 Introduction ............................................................................................................................................................. 1-5 1.2.1 Geography and Climate .................................................................................................................................... 1-5 1.2.2 Historical Overview ........................................................................................................................................... 1-6 1.3 Planning Methodology............................................................................................................................................. 1-7 1.4 What’s New .............................................................................................................................................................. 1-7 1.4.1 Road Drainage Inspection and Maintenance (2016) .......................................................................................... 1-7 1.4.2 Storm Water Capital Improvement Projects (2016 through 2018) ..................................................................... 1-8 1.4.3 Downtown Drainage Improvements .................................................................................................................. 1-8 1.4.4 Delta Urban Renewal Plan (Completed 2017) .................................................................................................... 1-9 1.5 Risk Assessment ....................................................................................................................................................... 1-9 1.5.1 Hazard Screening Criteria ................................................................................................................................ 1-10 1.5.2 Hazard Risk Ranking ....................................................................................................................................... 1-11 1.5.3 Vulnerability Assessment and Total Assets at Risk ........................................................................................... 1-11 1.5.4 Population and Asset Inventory ....................................................................................................................... 1-11 1.5.5 Critical Facilities Inventory .............................................................................................................................. 1-12 1.5.6 Parcel Value Inventory .................................................................................................................................... 1-14 1.5.7 Hazus Structure and Content Value Inventory ................................................................................................. 1-14 1.5.8 Vulnerability to Specific Hazards ..................................................................................................................... 1-17 1.5.9 Dam Failure Hazard ........................................................................................................................................ 1-19 1.5.10 Drought Hazard Profile ................................................................................................................................... 1-27 1.5.11 Flood Hazard Profile ........................................................................................................................................ 1-29 1.6 Mitigation Strategy ................................................................................................................................................ 1-39 i DELTA COUNTY COLORADO Delta County Multi-Jurisdictional Hazard Mitigation Plan (MJHMP) 1.6.1 Identifying the Problem ................................................................................................................................... 1-39 1.6.2 Capability Assessment ..................................................................................................................................... 1-41 1.6.3 Guiding Principle, Goals and Objectives ........................................................................................................... 1-45 1.6.4 Mitigation Action Plan ..................................................................................................................................... 1-45 1.7 Plan Implementation and Maintenance ................................................................................................................ 1-49 1.7.1 Incorporation into Other Planning Mechanisms............................................................................................... 1-49 Section 2. TOWN OF CEDAREDGE ..................................................................................................2-1 Municipal Adoption Records ................................................................................................................................................ 2-3 2.1 Purpose..................................................................................................................................................................... 2-1 2.2 Introduction ............................................................................................................................................................. 2-1 2.2.1 Geography and Climate ..................................................................................................................................... 2-1 2.2.2 Historical Overview ........................................................................................................................................... 2-2 2.3 Planning Methodology ............................................................................................................................................. 2-3 2.4 What’s New .............................................................................................................................................................. 2-3 2.5 Risk Assessment ....................................................................................................................................................... 2-3 2.5.1 Hazard Screening Criteria .................................................................................................................................. 2-4 2.5.2 Hazard Risk Ranking .......................................................................................................................................... 2-5 2.5.3 Vulnerability Assessment and Total Assets at Risk ............................................................................................. 2-5 2.5.4 Population and Asset Inventory ......................................................................................................................... 2-5 2.5.5 Critical Facilities Inventory ................................................................................................................................. 2-6 2.5.6 Parcel Value Inventory....................................................................................................................................... 2-8 2.5.7 Hazus Structure and Content Value Inventory.................................................................................................... 2-8 2.5.8 Vulnerability to Specific Hazards...................................................................................................................... 2-10 2.5.9 Drought Hazard Profile .................................................................................................................................... 2-11 2.5.10 Flood Hazard Profile ........................................................................................................................................ 2-13 2.5.11 Geohazard (Slope Failure) Profile..................................................................................................................... 2-21 2.5.12 Severe Winter Weather Hazard Profile ............................................................................................................ 2-27 2.6 Mitigation Strategy ................................................................................................................................................ 2-29 2.6.1 Identifying the Problem ................................................................................................................................... 2-29 2.6.2 Capability Assessment ..................................................................................................................................... 2-31 2.6.3 Guiding Principle, Goals and Objectives ..........................................................................................................