APPENDIX H WAGON WHEEL CREEK RESTORATION PLAN MAINTENANCE PROGRAM Wagon Wheel Creek Restoration Plan Maintenance Program General Thomas F. Riley Wilderness Park Orange County, California Submitted to OC Community Resources 13042 Old Myford Road Irvine, California 92602 Prepared by Consulting Services, Inc. WRC Consulting Services, Inc. 1800 East Garry Avenue, Suite 213 Santa Ana, California 92705 (949) 833-8388 June 2013 Project Team WRC Consulting Services, Inc. Lan Weber, P.E., Ph.D. Principal Civil Engineer Dan Nove Senior Planner and Operation Specialist Rebekah Beardshear Planner and Graphic Designer Margot Griswold, Ph.D. Principal Biologist (Newfields) Mark Denny, Director John Gannaway, Parks Division Manager Barbara Norton, Parks Division Manager Scott Thomas, Manager, Design Joanne Quirk, Project Manager Mark Estoque, Environmental Engineer Specialist Robin LaMont, NPDES Coordinator, Environmental Compliance Support Bill Kirk, Manager, Systems and Resource Management Division Jeremy Hampton, Manager, CMMS Operations Jennifer Naegele, RestorationConsulting Se Ecologist/Resorvices, Inc. urce Specialist Gabriel Lopez, Senior Maintenance Coordinator, South Division Rod Hawkins, Maintenance Crew Supervisor III, Caspers/Riley Dennis Shaffer, Supervising Park Ranger Carroll Baldwin, Senior Park Ranger Wagon Wheel Creek Restoration Plan Maintenance Program Table of Contents Section 1 - Introduction ..........................................................................................................................................................1 1.1 Wagon Wheel Creek Restoration Plan Objectives and Maintenance Needs ...........................................................1 1.2 Document Organization ........................................................................................................................................4 1.3 Inspection and Maintenance Areas ......................................................................................................................4 Section 2 - Maintenance Responsibility ..................................................................................................................................7 Section 3 - Work Descriptions ................................................................................................................................................9 3.1 Overall Vegetation Maintenance ..........................................................................................................................9 3.2 Riparian Planting Establishment ...........................................................................................................................9 3.3 Channel Sections and Grades ............................................................................................................................ 11 3.4 Drop Structures ................................................................................................................................................ 12 3.5 Sheet Piles........................................................................................................................................................ 13 3.6 ArmorFlex ......................................................................................................................................................... 14 3.7 Plain Riprap ...................................................................................................................................................... 14 3.8 Derrick Stones .................................................................................................................................................. 15 3.9 Grouted Riprap ................................................................................................................................................. 16 3.10 Lateral Storm Drain Flow Control ..................................................................................................................... 17 3.11 Sediment Control .............................................................................................................................................. 17 3.12 Debris Control ................................................................................................................................................... 18 3.13 Minor Structures .............................................................................................................................................. 19 3.13.1 Earthen Berms ................................................................................................................................... 19 3.13.2 Culverts for Creek Crossing ............................................................................................................... 19 3.13.3 Outlet Protection (Not Part of WWCRP) ............................................................................................. 20 Section 4 - Work Periods, Frequencies, Sequences and Accesses ........................................................................................ 20 4.1 General Requirements ....................................................................................................................................... 20 4.2 High Priority Areas ........................................................................................................................................... 24 4.2.1 Sheet Pile No. 1 (Area 1) ................................................................................................................... 24 4.2.2 Oso Parkway Culvert (Area 7) ........................................................................................................... 25 i Wagon Wheel Creek Restoration Plan Maintenance Program 4.2.3 Entrenched Sections (Downstream & Upstream of Area 7) ................................................................ 26 4.2.4 Wide Area Sections (Area 8) .............................................................................................................. 28 4.2.5 Downstream of Pedestrian Bridge (Area 9) and Upstream of Pedestrian Bridge (Area 9B) ................. 29 4.3 Medium Priority Areas ...................................................................................................................................... 31 4.3.1 ArmorFlex Area (Area 2) .................................................................................................................... 31 4.3.2 Downstream of Vela Court (Area 4) ................................................................................................... 33 4.3.3 Near Park Ranger Station (Area 6) ..................................................................................................... 34 4.3.4 Stormwater Management (Area 11) .................................................................................................. 35 4.4 Low Priority Areas ............................................................................................................................................ 36 4.4.1 Downstream of S-Turn (Sheet Pile No. 2) .......................................................................................... 36 4.4.2 S-Turn Area (Area 3) .......................................................................................................................... 38 4.4.3 Between Vela Court and Sandy Knoll (Sheet Pile No. 3) ..................................................................... 39 4.4.4 Upstream of Oak Canyon Creek (Area 5) ........................................................................................... 40 Section 5 - Inspection Checklists ......................................................................................................................................... 41 Section 6 - Emergency Maintenance .................................................................................................................................... 42 List of Tables & Figures Figure 1 WWCRP Key Map ................................................................................................................................... 2 Table 1 WWCRP Improvement Matrix ................................................................................................................. 3 Figure 2 Maintenance and Emergency Access Gates ............................................................................................ 5 Appendix A - Inspection & Maintenance Figures Figure A.1 Inspection & Maintenance Boundary for Area 1 (Sheet Pile 1) Figure A.2 Inspection & Maintenance Boundary for Area 2 (ArmorFlex Area) Figure A.3 Inspection & Maintenance Boundary for Sheet Pile No. 2 (Downstream of S-Turn) Figure A.4 Inspection & Maintenance Boundary for Area 3 (S-Turn Area) Figure A.5 Inspection & Maintenance Boundary for Area 4 (Downstream of Vela Court) Figure A.6 Inspection & Maintenance Boundary for Sheet Pile No. 3 (Between Vela Ct. & Sandy Knoll) ii Wagon Wheel Creek Restoration Plan Maintenance Program Figure A.7 Inspection & Maintenance Boundary for Area 5 (Upstream of Oak Canyon Creek) Figure A.8 Inspection & Maintenance Boundary for Area 6 (Near Park Ranger Station) Figure A.9 Inspection & Maintenance Boundary for Area 7 (Oso Creek Culvert) Figure A.10 Inspection & Maintenance Boundary for Downstream & Upstream of Area 7 (Entrenched Sections) Figure A.11 Inspection & Maintenance Boundary for Area 8 (Wide Area Sections) Figure A.12 Inspection & Maintenance Boundary for Area 9 (Downstream and