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ARCHAEOLOGICAL SIGNIFICANCE TESTING of FOUR SITES for the OCOTILLO WELLS SOLAR PROJECT SAN DIEGO COUNTY, CALIFORNIA P 12-004; Log No

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ARCHAEOLOGICAL SIGNIFICANCE TESTING of FOUR SITES for the OCOTILLO WELLS SOLAR PROJECT SAN DIEGO COUNTY, CALIFORNIA P 12-004; Log No ARCHAEOLOGICAL SIGNIFICANCE TESTING OF FOUR SITES for the OCOTILLO WELLS SOLAR PROJECT SAN DIEGO COUNTY, CALIFORNIA P 12-004; Log No. 12-12-001; APN: 253-390-57 & 58 Lead Agency: County of San Diego Department of Planning and Development Services Contact: Gail Wright 5510 Overland Avenue, Suite #310 San Diego, California 92123 Preparers: Micah J. Hale, Ph.D., RPA Chad Willis, M.A., RPA James T. Daniels, Jr., M.A., RPA Approved by: Micah J. Hale, Ph.D., RPA ASM Affiliates, Inc. 2034 Corte del Nogal Carlsbad, California 92011 760-804-5757 Project Proponent: Gregg Haggart Gildred Building Co. 550 West C Street, Suite #1820 San Diego, California 92101 March 2013 This Page Intentionally Left Blank NADB Information NATIONAL ARCHAEOLOGICAL DATABASE INFORMATION Author: Micah J. Hale and Chad Willis Firm: ASM Affiliates, Inc. Client/Project Proponent: RBF Consulting Report Date: September 2012 Report Title: Archaeological Significance Testing of Four Sites for the Ocotillo Wells Solar Project San Diego County, California Type of Study: Phase II Archaeological Evaluation New Sites: N/A Updated Sites: CA-SDI-20,345, CA-SDI-20,346, CA-SDI-20,347, CA-SDI- 20,348 USGS Quad: Borrego Mountain South East 7.5-minute Acreage: 336 acres Keywords: Borrego Mountain South East 7.5-minute quadrangle, CA-SDI- 20,345, CA-SDI-20,346, CA-SDI-20,347, CA-SDI-20,348, prehistoric, habitation, lithics, ground stone, pot sherds Ocotillo Wells Solar Archaeological Survey i This Page Intentionally Left Blank Table of Contents TABLE OF CONTENTS Chapter Page NATIONAL ARCHAEOLOGICAL DATABASE INFORMATION .................... i MANAGEMENT SUMMARY ................................................................ vii 1.0 INTRODUCTION .......................................................................... 1 1.1 PROJECT DESCRIPTION .................................................................. 1 1.2 REGULATORY CONTEXT ............................................................... 5 1.3. EXISTING CONDITIONS .................................................................. 6 1.3.1 Environmental Setting ................................................................ 6 1.3.2 Record Search Results ............................................................... 18 1.4 APPLICABLE REGULATIONS .......................................................... 18 2.0 GUIDELINES FOR DETERMINING SIGNIFICANCE ....................... 21 2.1 COUNTY OF SAN DIEGO RESOURCE PROTECTION ORDINANCE (RPO) .......................................................................................... 21 2.2 SAN DIEGO COUNTY LOCAL REGISTER OF HISTORICAL RESOURCES ................................................................................ 22 2.3 CALIFORNIA REGISTER OF HISTORIC RESOURCES AND THE CALIFORNIA ENVIRONMENTAL QUALITY ACT ............................... 23 3.0 RESEARCH DESIGN .................................................................. 25 3.1 MANAGEMENT CONCERNS ........................................................... 25 3.1.1 Integrity ................................................................................ 25 3.1.2 Chronological Placement ............................................................ 25 3.1.3 Site Function .......................................................................... 26 3.1.4 Native American Heritage Values ................................................. 26 3.2 POTENTIAL REGIONAL RESEARCH TOPICS ..................................... 27 3.2.1 Chronology Building ................................................................. 27 3.2.2 Paleoenvironmental Change and Resource Use ................................. 28 3.2.3 Settlement Organization ............................................................. 28 3.2.4 Interregional Connections ........................................................... 29 4.0 ANALYSIS OF PROJECT EFFECTS .............................................. 31 4.1 METHODS .................................................................................... 31 4.1.1 Survey Methods ....................................................................... 31 4.1.2 Test Methods .......................................................................... 31 4.1.3 Laboratory Methods ................................................................. 32 4.1.4 Curation ................................................................................ 33 4.1.5 Native American Participation ..................................................... 33 Ocotillo Wells Solar Archaeological Survey iii Table of Contents TABLE OF CONTENTS (Continued) Chapter Page 4.2 RESULTS ..................................................................................... 33 4.2.1 CA-SDI-20,345 ....................................................................... 34 4.2.2 CA-SDI-20,346 ....................................................................... 34 4.2.3 CA-SDI-20,347 ....................................................................... 35 4.2.4 CA-SDI-20,348 ....................................................................... 36 4.2.5 Isolates ................................................................................. 37 5.0 INTERPRETATION OF RESOURCE IMPORTANCE AND IMPACT IDENTIFICATION ...................................................................... 39 5.1 RESOURCE IMPORTANCE AND MANAGEMENT CONCERNS .............. 39 5.2 IMPACT IDENTIFICATION ............................................................. 40 6.0 MANAGEMENT CONSIDERATIONS – RECOMMENDATIONS ......... 41 7.0 REFERENCES ........................................................................... 43 8.0 LIST OF PREPARERS AND PERSONS AND ORGANIZATIONS CONTACTED ............................................................................ 53 9.0 LIST OF MITIGATION MEASURES AND DESIGN CONSIDERATIONS ................................................................... 55 APPENDICES ..................................................................................... 57 APPENDIX A. Site Location Maps and Site Forms – Confidential APPENDIX B. Records Search iv Ocotillo Wells Solar Archaeological Survey Table of Contents LIST OF FIGURES Page Figure 1.1 Project vicinity map. ....................................................................... 2 Figure 1.2 Project location map. ....................................................................... 3 Figure 4.1 CA-SDI-20,345 overview taken towards the west. .................................. 34 Figure 4.2a Confidential Site Map of GS-BC-01 ........................ Confidential Appendix A Figure 4.2b Confidential Location Map of GS-BC-01 .................. Confidential Appendix A Figure 4.3 CA-SDI-20,346 overview taken towards the east. ................................... 35 Figure 4.4a Confidential Site Map of GS-BC-02 ........................ Confidential Appendix A Figure 4.4b Confidential Location Map of GS-BC-02 .................. Confidential Appendix A Figure 4.5 SDI-20,347 overview taken towards the north. ....................................... 36 Figure 4.6a Confidential Site Map of GS-BC-04 ........................ Confidential Appendix A Figure 4.6b Confidential Location Map of GS-BC-04 .................. Confidential Appendix A Figure 4.7 CA-SDI-20,238 overview taken toward the east. .................................... 37 Figure 4.8a Confidential Site Map of CA-SDI-20,238 ................. Confidential Appendix A Figure 4.8b Confidential Location Map of CA-SDI-20,238 ........... Confidential Appendix A LIST OF TABLES Page Table 1.1 Potential Solar Collection Systems for Ocotillo Wells Solar Farm ................. 4 Table 1.2 Colorado Desert Paleoenvironmental History ......................................... 8 Table 4.1 Ocotillo Wells Solar Archaeological Evaluation Results ............................ 33 Table 4.2 Summary of Isolates ....................................................................... 37 Ocotillo Wells Solar Archaeological Survey v This Page Intentionally Left Blank Management Summary MANAGEMENT SUMMARY The Gildred Building Company plans to develop a 336-acre solar energy system on approximately 440 acres in the vicinity of Ocotillo Wells, an unincorporated area of San Diego County, California. This project proposes to install single-axis rotating solar panels, and a control and operations management building, a private substation, as well as a series of access roads. ASM Affiliates, Inc. (ASM) was contracted to complete the cultural resources inventory for the proposed project in 2011. ASM identified four sites (CA-SDI-20,345, CA-SDI-20,346, CA-SDI-20,347, and CA-SDI-20,348) and eight isolates within the project area, recommending either avoidance or formal evaluation to assess each resource’s eligibility for inclusion in the California Register of Historical Resources (CRHR). The current study documents the results of formal significance evaluation of the four archaeological sites identified during survey. Each of the four sites were tested and are recommended as not eligible for listing in the CRHR as they are not likely to yield additional information that would be significant in the understanding of the prehistory of the region. No further cultural resources work is recommended for the current project as proposed. The current investigation was conducted on 23 June 2011 by ASM Senior Archaeologist, Chad A. Willis and ASM Assistant Archaeologists Rachael Myrick and Nick Hanten. Gabe Kitchen of Red Tail Monitoring and Research served as the Native American Monitor during the investigation.
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