Historic Properties Management Plan/ Historic Properties Treatment Plan for the Cleveland National Forest Master Special Use Permit and Permit to Construct Powerline Replacement Projects Prepared for: San Diego Gas & Electric Company Prepared by: Susan M. Hector, Ph.D. NWB Environmental Services Principal Investigator Brian Williams ASM Affiliates Principal Investigator PN 23000.01 August 2016 Table of Contents TABLE OF CONTENTS Chapter Page EXECUTIVE SUMMARY ..................................................................................... iii GLOSSARY OF TERMS AND ABBREVIATIONS .............................................. iv 1.0 GENERAL INFORMATION RELATED TO THE HPMP ............................ 1 1.1 INTRODUCTION ....................................................................................................... 1 1.2 PROJECT DESCRIPTION AND BACKGROUND ..................................................... 2 1.2.1 Project Description ......................................................................................... 2 1.2.2 Geographic Setting and Master Special Use Permit Boundaries ................... 3 1.3 OBJECTIVES AND RESPONSIBILITIES ................................................................ 11 1.3.1 Objectives of the HPMP ............................................................................... 11 1.3.2 Roles and Responsibilities .......................................................................... 12 1.3.3 Professional Qualifications ................................................................................ 13 1.3.4 Curation ............................................................................................................. 13 1.4 CULTURAL CONTEXT AND ASSOCIATED PROPERTY TYPES ......................... 14 1.4.1 Natural Setting ............................................................................................. 14 1.4.2 Cultural Setting ............................................................................................. 16 1.5 CULTURAL RESOURCES STUDIES WITHIN THE APE OF THE PROJECT ....... 25 1.5.1 Previous Studies within the Forest .................................................................... 25 1.5.2 Phase II Cultural Resources Study .............................................................. 26 1.5.3 Class III Wood to Steel Surveys ................................................................... 30 1.6 IDENTIFICATION AND EVALUATION OF HISTORIC PROPERTIES .................... 35 1.6.1 Regulatory Context ...................................................................................... 35 1.6.2 Identification and Evaluation ........................................................................ 35 1.6.3 Evaluation of Prehistoric Archaeological Properties..................................... 40 1.6.4 Evaluation of Traditional Cultural Properties (TCP) ..................................... 42 1.6.5 Evaluation of Historic Era Properties............................................................ 43 1.6.6 Considering the Effects of the Undertaking on Historic Properties ............. 46 2.0 OPERATIONS AND MAINTENANCE ACTIVITIES ................................ 49 2.1 DESCRIPTION OF SDG&E OPERATIONS AND MAINTENANCE ACTIVITIES WITHIN THE MSUP APE ........................................................................................ 49 2.1.1 Inspections ................................................................................................... 49 2.1.2 Annual Routine Vegetation Management Work ........................................... 50 2.1.3 Routine Pole/Tower and Conductor Maintenance ....................................... 50 2.1.4 Authorized Road Access and Maintenance ................................................. 50 2.2. AVOIDANCE OF POTENTIAL EFFECTS TO HISTORIC PROPERTIES DURING OPERATIONS AND MAINTENANCE ACTIVITIES WITHIN THE MSUP APE ....... 51 2.2.1 Standard Resource Protection Measures .................................................... 51 2.2.2 Resolution of Inadvertent Effects and Unanticipated Discoveries ................ 55 2.2.3 Emergency Situations .................................................................................. 56 3.0 POWERLINE REPLACEMENT PROJECT ACTIVITIES ......................... 57 3.1 HISTORIC PROPERTIES TREATMENT PLAN/HISTORIC PROPERTIES MANAGEMENT PLAN FOR ADVERSE EFFECTS WITHIN THE PROJECT APE . 57 3.1.1 Description of Project ................................................................................... 57 3.1.2 Final Record of Decision .............................................................................. 57 CNF HPMP i Table of Contents 3.1.3 Avoidance Measures .................................................................................... 58 3.1.4 CRHR/NRHP Evaluations for Historic Properties ......................................... 60 3.1.5 During Construction Activities…………………………………………………..69 3.1.6 Inadvertent Effects and Unanticipated Discoveries (During Construction) .. 69 3.1.7 Treatment of Human Remains ..................................................................... 72 4.0 BIBLIOGRAPHY ...................................................................................... 73 APPENDICES ..................................................................................................... 83 APPENDIX A: Recommended Avoidance Measures for Powerline Replacement Project ................ 85 APPENDIX B: Consultation and Cooperation with Tribes, Native American Organizations, and Individuals during O&M under the MSUP ................................................................... 15 APPENDIX C: General Public Consultation and Participation ........................................................... 19 APPENDIX D: Employee Education and Public Awareness Program ............................................... 23 APPENDIX E: Reporting Requirements during O&M of the MSUP ................................................... 27 LIST OF FIGURES Page Figure 1. Trabuco District. ........................................................................................................................ 5 Figure 2. Palomar and Descanso Districts. .............................................................................................. 7 Figure 3. Descanso District. ...................................................................................................................... 9 LIST OF TABLES Page Table 1. SDG&E Electric Facilities to be included in the MSUP as part of the Proposed Project ...................................................................................................................... 4 Table 2. Routine Maintenance Activities ............................................................................................... 49 Table 3. Major Project Maintenance or Reconstruction ........................................................................ 57 Table 4. CRHR/NRHP Evaluations for Historic Properties .................................................................... 61 ii ASM Affiliates, Inc. Executive Summary EXECUTIVE SUMMARY This Historic Properties Management Plan (HPMP) was prepared in support of the Cleveland National Forest (CNF, Forest) Master Special Use Permit (MSUP) and Permit to Construct (PTC) Powerline Replacement Projects (Project). Under this effort, San Diego Gas and Electric Company (SDG&E or “Company”) is proposing to combine multiple individual permits and easements for SDG&E electric facilities within the CNF into one MSUP to be issued by the United States Forest Service (USFS). SDG&E is also proposing to replace five 69 kV powerlines and six 12 kV distribution circuits located within and outside the CNF. Replacement would primarily include fire-hardening (wood-to-steel replacement), relocation, removal, reconductoring, and undergrounding that requires authorization by the USFS under the MSUP, as well as a permit to construct from the California Public Utilities Commission (CPUC). The HPMP presents the measures that will be implemented to address the avoidance, minimization of impacts and mitigation of possible impacts to cultural resources for any operations and maintenance activities proposed by SDG&E for existing electric infrastructure under the MSUP on land managed by the USFS. Ongoing operations and maintenance activities within the CNF boundary are included in this document. This HPMP may be used as a guiding document for activities on lands not managed by the USFS. This HPMP also addresses the proposed fire hardening effort for eleven powerlines and distribution circuits both within and outside the CNF and for ongoing Operations and Maintenance (O&M) of those specific facilities on land managed by the USFS. This document was prepared in accordance with the Final Environmental Impact Report/Environmental Impact Statement (FEIR/EIS) for the Project and the Programmatic Agreement among the Cleveland National Forest, San Diego Gas & Electric Company, and the California State Historic Preservation Officer Regarding San Diego Gas & Electric Company’s Master Special Use Permit and Powerline Replacement Projects Powerline (PA) between USFS, State Historic Preservation Officer (SHPO), SDG&E, and CPUC. CNF HPMP iii Glossary of Terms and Abbreviations GLOSSARY OF TERMS AND ABBREVIATIONS Glossary The following terms are defined for describing the historic preservation program in the HPMP. The terms defined in Stipulation 1 of the PA, the definitions below, and others as appropriate, will comprise the glossary