Significant Natural Resource Areas Management Plan Final Draft February 2006 San Francisco Recreation and Park Department Significant Natural Resource Areas Management Plan TABLE OF CONTENTS Page 1 OVERVIEW 1.1 Introduction........................................................................................................ 1-1 1.2 Significant Natural Resource Areas ................................................................. 1-1 1.3 Natural Areas Program...................................................................................... 1-1 1.4 Management Plan Background and Objectives............................................... 1-2 1.5 Plan Scope and Definitions............................................................................... 1-4 1.6 Relationship to Other Plans and Policies......................................................... 1-6 1.7 Public Input, Outreach, and Next Steps ........................................................... 1-9 1.8 Plan Participants .............................................................................................. 1-11 1.9 Management Plan Organization ..................................................................... 1-12 2 MANAGEMENT APPROACH 2.1 Goals................................................................................................................... 2-1 2.2 Ecosystem Functions and Management Concerns .......................................... 2-2 2.3 Restoration and Management Strategies and Methods................................... 2-3 3 SETTING 3.1 Climate ............................................................................................................... 3-1 3.2 Geology, Soils, and Hydrology ........................................................................ 3-1 3.3 Biology - The Franciscan Landscape............................................................... 3-3 3.4 Recreation and Public Use.............................................................................. 3-13 3.5 Land Use Histories .......................................................................................... 3-16 4 INTEGRATED PEST MANAGEMENT (IPM) 4.1 Introduction........................................................................................................ 4-1 4.2 IPM Programs.................................................................................................... 4-2 5 GENERAL RECOMMENDATIONS 5.1 Introduction........................................................................................................ 5-1 5.2 System-wide Issues and Management Actions ............................................... 5-1 5.3 Best Management Practices............................................................................ 5-20 FINAL DRAFT FEBRUARY 2006 i SIGNIFICANT NATURAL RESOURCE AREAS MANAGEMENT PLAN SAN FRANCISCO RECREATION AND PARK DEPARTMENT Table of Contents Page 6 SITE-SPECIFIC CONDITIONS AND RECOMMENDATIONS 6.0 Site-Specific Conditions and Recommendations ................................................................. 6.0-1 6.1 Lake Merced ......................................................................................................................... 6.1-1 General Description and Location ......................................................... 6.1-1 Geology, Hydrology, and Trails.............................................................. 6.1-2 Vegetation................................................................................................. 6.1-3 Wildlife .................................................................................................... 6.1-6 Management Areas................................................................................. 6.1-11 Issues and Recommendations................................................................ 6.1-12 6.2 Mount Davidson ..................................................................................................................... 6.2-1 General Description and Location ......................................................... 6.2-1 Geology, Hydrology, and Trails.............................................................. 6.2-1 Vegetation................................................................................................. 6.2-2 Wildlife .................................................................................................... 6.2-5 Management Areas................................................................................... 6.2-6 Issues and Recommendations.................................................................. 6.2-7 6.3 Glen Canyon Park and O’Shaughnessy Hollow................................................................... 6.3-1 General Description and Location ......................................................... 6.3-1 Geology, Hydrology, and Trails.............................................................. 6.3-2 Vegetation................................................................................................. 6.3-3 Wildlife .................................................................................................... 6.3-6 Management Areas................................................................................... 6.3-8 Issues and Recommendations.................................................................. 6.3-9 6.4 Sharp Park ......................................................................................................................... 6.4-1 General Description and Location ......................................................... 6.4-1 Geology, Hydrology, and Trails.............................................................. 6.4-1 Vegetation................................................................................................. 6.4-4 Wildlife ..................................................................................................... 6.4-5 Management Areas................................................................................... 6.4-8 Issues and Recommendations.................................................................. 6.4-9 6.5 Grandview Park, Rock Outcrop, Golden Gate Heights, and Hawk Hill............................. 6.5-1 General Description and Location .......................................................... 6.5-1 Geology, Hydrology, and Trails.............................................................. 6.5-1 Vegetation................................................................................................. 6.5-2 Wildlife .................................................................................................... 6.5-4 Management Areas................................................................................... 6.5-6 Issues and Recommendations.................................................................. 6.5-6 FINAL DRAFT FEBRUARY 2006 ii SIGNIFICANT NATURAL RESOURCE AREAS MANAGEMENT PLAN SAN FRANCISCO RECREATION AND PARK DEPARTMENT Table of Contents Page 6.6 Brooks Park and Lakeview/Ashton Mini Park..................................................................... 6.6-1 General Description and Location .......................................................... 6.6-1 Geology, Hydrology, and Trails.............................................................. 6.6-1 Vegetation................................................................................................. 6.6-2 Wildlife ..................................................................................................... 6.6-3 Management Areas................................................................................... 6.6-4 Issues and Recommendations.................................................................. 6.6-4 6.7 Pine Lake ......................................................................................................................... 6.7-1 General Description and Location ......................................................... 6.7-1 Geology, Hydrology, and Trails.............................................................. 6.7-1 Vegetation................................................................................................. 6.7-2 Wildlife .................................................................................................... 6.7-3 Management Areas................................................................................... 6.7-5 Issues and Recommendations.................................................................. 6.7-6 6.8 Twin Peaks ......................................................................................................................... 6.8-1 General Description and Location ......................................................... 6.8-1 Geology, Hydrology, and Trails.............................................................. 6.8-1 Vegetation................................................................................................. 6.8-2 Wildlife .................................................................................................... 6.8-4 Management Areas................................................................................... 6.8-6 Issues and Recommendations.................................................................. 6.8-6 6.9 Billy Goat Hill ........................................................................................................................ 6.9-1 General Description and Location ......................................................... 6.9-1 Geology,