Appendix N Archaeological Resource Report for the San Dieguito Lagoon W
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APPENDIX N ARCHAEOLOGICAL RESOURCE REPORT FOR THE SAN DIEGUITO LAGOON W-19 RESTORATION PROJECT San Dieguito Lagoon W-19 Restoration Project Final EIR Appendices November 2018 ARCHAEOLOGICAL RESOURCE REPORT FOR THE SAN DIEGUITO LAGOON W-19 RESTORATION PROJECT SAN DIEGO, SAN DIEGO COUNTY, CALIFORNIA Submitted to: San Dieguito River Park Joint Powers Authority 18372 Sycamore Creek Road Escondido, CA 92025 U.S. Army Corps of Engineers Los Angeles District Regulatory Division, Carlsbad Field Office 5900 La Place Court, Suite 100 Carlsbad, CA 92008 Submitted by: AECOM 401 West A Street, Suite 1200 San Diego, CA 92101 Patrick McGinnis, M.A., RPA, Archaeologist Rachel Droessler, B.S., Archaeologist Restricted Distribution – Confidential Information Area Surveyed: 172.5 acres USGS Quadrangle: 7.5' Del March November 2018 Cultural Resources: CA-SDI-7291, CA-SDI-7293, CA-SDI-10118, CA-SDI-10535, CA-SDI-20032, P-37-014760, P-37-014761, P-37-014764, P-37-014765, P-37-031577, CA-SDI-21796 TABLE OF CONTENTS Section Page INTRODUCTION .......................................................................................................................... 1 Project Description and Location ........................................................................................ 1 SETTING ........................................................................................................................................ 3 Natural Environment ........................................................................................................... 3 Paleoenvironmental Setting .................................................................................... 3 Existing Natural Setting .......................................................................................... 4 Ethnography/History ........................................................................................................... 5 Prehistoric Period .................................................................................................... 5 Ethnohistoric Period................................................................................................ 6 Historic Period ........................................................................................................ 7 AREA OF POTENTIAL EFFECTS ............................................................................................. 11 STUDY METHODS ..................................................................................................................... 13 RESULTS OF STUDY ................................................................................................................. 15 Background Research ....................................................................................................... 15 Previous Investigations ......................................................................................... 15 Previously Recorded Archaeological Properties .................................................. 25 CA-SDI-7291 ........................................................................................................ 31 CA-SDI-7293 ........................................................................................................ 31 CA-SDI-8225/H .................................................................................................... 31 CA-SDI-10118 ...................................................................................................... 32 CA-SDI-10535 ...................................................................................................... 32 CA-SDI-20032 ...................................................................................................... 32 P-37-014760 .......................................................................................................... 32 P-37-014761 .......................................................................................................... 33 P-37-014764 .......................................................................................................... 33 P-37-014765 .......................................................................................................... 33 P-37-031577 .......................................................................................................... 33 Native American Contact Program ................................................................................... 33 Field Reconnaissance ........................................................................................................ 33 CA-SDI-21796 ...................................................................................................... 34 CA-SDI-7291 ........................................................................................................ 35 CA-SDI-7293 ........................................................................................................ 35 CA-SDI-10118 ...................................................................................................... 35 CA-SDI-10535 ...................................................................................................... 36 CA-SDI-20032 ...................................................................................................... 36 P-37-014760 .......................................................................................................... 36 San Dieguito Lagoon W-19 Restoration Project Page i Archaeological Resources Report P-37-014761 .......................................................................................................... 37 P-37-014764 .......................................................................................................... 37 P-37-014765 .......................................................................................................... 37 P-37-031577 .......................................................................................................... 37 Evaluation ......................................................................................................................... 37 RECOMMENDATIONS .............................................................................................................. 43 ATTACHMENTS A National Archaeological Data Base Information B Bibliography C Maps D Photographs E Personnel Qualifications CONFIDENTIAL APPENDICES (Bound Separately) A Records Search Results B Historical Resource Location Maps and Site Maps C New and Updated Historical Resource Records LIST OF TABLES Table Page 1 Previous Investigations Conducted within a 1-Mile Radius of the Project Area ..............16 2 Previously Recorded Archaeological Properties within a 1-Mile Radius of the Project Area ...................................................................................................................... 26 3 Cultural Resources within the Proposed APE .................................................................. 34 Page ii San Dieguito Lagoon W-19 Restoration Project Archaeological Resources Report INTRODUCTION PROJECT DESCRIPTION AND LOCATION San Dieguito Lagoon is located within the San Dieguito River Valley in the City of San Diego, San Diego County, California (Attachment A and B contain report and bibliographic information). The San Dieguito Lagoon W-19 Restoration Project (proposed project) would be located within San Dieguito Lagoon, east of lnterstate 5 (I-5), south of County Highway S6, and west of El Camino Real (Figure 1 and 2; figures are attached to this report as Attachment C). The proposed project site (W-19) is located within lands owned by the San Dieguito River Park Joint Power Authority (JPA), California Department of Fish and Wildlife, the 22nd Agricultural District, and the City of San Diego, and is within the Focused Planning Area of the San Dieguito River Park. The proposed project would restore approximately 141 acres to a functional mix of tidal salt marsh, brackish marsh, and transitional/upland habitats (Figures 3 and 4; Attachment C). Tidal salt marsh habitat would be created west of the existing utility corridor and brackish marsh habitat east of the utility corridor. Upland/transitional habitats would be placed adjacent to wetland habitat to support the ecological function of the restoration project. An existing utility corridor would be enhanced (e.g., through planting with transitional habitat consisting of low- growing, native species that would be maintained by San Diego Gas & Electric) as part of the proposed project. Approximately 60 acres of tidal salt marsh would be created west of the existing utility corridor and south of the San Dieguito River. Tidal connection with the river would be constructed at the west end of the project site in the vicinity of the existing least tern nesting island. An upland terrace berm planted with a mix of transitional and upland habitat would be constructed between the salt marsh and the San Dieguito River channel to protect the wetlands from damage due to flood and sedimentation, and to maintain sand movement through the river channel. Protection from erosion within the site would be provided along the utility corridor as well as at the outlet of the existing stormwater culvert extending under El Camino Real. East of the existing utility corridor, approximately 15 acres of brackish marsh would be created as part of the proposed project. An open water channel from the San Dieguito River would be constructed through the brackish marsh area. Similar to the salt marsh area, an upland terrace