Beachie Creek Fire Erosion Threat Assessment/Reduction Team (ETART) Extended Report December 2020 ETART Extended Report – Beachie Creek Fire This page intentionally left blank. DR-4562-OR | EROSION THREAT ASSESSMENT/REDUCTION TEAM ETART Extended Report – Beachie Creek Fire Table of Contents Executive Summary ................................................................................................................... 1 1. Overview .................................................................................................................................. 3 1.1. Burned Area Characterization ........................................................................................ 3 1.2. Post-fire Watershed Condition ........................................................................................ 8 2. Risk Assessment and Recommendations ............................................................................ 12 2.1. Human Life and Safety Summary ............................................................................... 12 2.2. Property Summary ........................................................................................................ 15 2.3. Soil and Water Summary ............................................................................................. 22 2.4. Fish and Wildlife Habitat Summary ............................................................................. 22 2.5. Native Plant Communities Summary .......................................................................... 25 2.6. Cultural Resources Summary ...................................................................................... 29 3. Monitoring and Management Recommendations ............................................................... 30 3.1. Watershed Response and Hydrologic Analysis - Monitoring Recommendations ..... 30 3.2. Geologic Hazards - Management Recommendations................................................ 31 3.3. Roads and Travel Routes - Management Recommendations ................................... 31 3.4. Fish/Aquatic Habitat - Management Recommendations and Monitoring ................ 31 Resource Reports.................................................................................................................... 32 1. Weeds Specialist Report ...................................................................................................... 32 1.1. Summary ....................................................................................................................... 32 1.2. Assessment Methodology – Field assessment and Modeling .................................. 34 1.3. Results .......................................................................................................................... 35 1.4. Recommendations ....................................................................................................... 49 1.5. References .................................................................................................................... 55 2. Engineering Report ............................................................................................................... 55 2.1. Objectives ..................................................................................................................... 55 2.2. Values at Risk ............................................................................................................... 56 2.3. Observations ................................................................................................................. 57 2.4. Reconnaissance Methodology and Results ................................................................ 57 DR-4562-OR - December 2020 i ETART Extended Report – Beachie Creek Fire 2.5. Findings ......................................................................................................................... 59 2.6. Recommendations ....................................................................................................... 62 2.7. Management Recommendations ................................................................................ 65 2.8. References .................................................................................................................... 66 3. Heritage and Cultural Resources ......................................................................................... 66 3.1. Setting ........................................................................................................................... 67 3.2. Background ................................................................................................................... 68 3.3. Critical Values and Proposed Treatments .................................................................. 69 3.4. Assessment Methodology ............................................................................................ 69 4. Soil Resources ...................................................................................................................... 71 4.1. Summary ....................................................................................................................... 71 4.2. Resource Condition and Setting .................................................................................. 74 4.3. Assessment Methodology ............................................................................................ 76 4.4. Findings ......................................................................................................................... 77 4.5. Recommendations ....................................................................................................... 83 5. Hydrology Resources ............................................................................................................ 85 5.1. Objectives ..................................................................................................................... 85 5.2. Critical Values ............................................................................................................... 85 5.3. Resource Condition and Setting .................................................................................. 87 5.4. Assessment Methodology and Modeling .................................................................... 93 5.5. Findings ......................................................................................................................... 93 5.6. Recommendations ....................................................................................................... 97 5.7. References .................................................................................................................... 98 6. Geologic Hazards ................................................................................................................. 99 6.1. Introduction .................................................................................................................. 99 6.2. Assessment Methodology .......................................................................................... 101 6.3. Findings ....................................................................................................................... 102 6.4. Recommendations ..................................................................................................... 103 6.5. Mitigation and Further Evaluation ............................................................................. 106 6.6. References .................................................................................................................. 107 DR-4562-OR - December 2020 ii ETART Extended Report – Beachie Creek Fire 7. Hazard Trees ...................................................................................................................... 110 7.1. Objectives ................................................................................................................... 110 7.2. Danger/Hazard Trees Described ............................................................................... 110 7.3. Recommendations ..................................................................................................... 114 7.4. Danger Tree Guidelines ............................................................................................. 117 7.5. References .................................................................................................................. 124 8. Fish and Wildlife Resources ............................................................................................... 127 8.1. Objectives ................................................................................................................... 127 8.2. Assessment Methodology - Field and Modeling ....................................................... 127 8.3. Resource Setting ........................................................................................................ 127 8.4. Critical Values, Results, Risk Assessment, and Recommendations ....................... 127 8.5. Recommended Monitoring ........................................................................................ 128 9. Beachie Creek ETART Members ......................................................................................... 129 Appendix A – Road Treatment Cost Estimates ..................................................................... 131 Appendix B – Invasive Plant Species Information, Treatment Design, and Cost