Archaeological Resources Inventory
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Sweetwater Vistas Project PDS2015-GPA-15-006; PDS2015-SPA-15-002 PDS2015-REZ-15-008; PDS2015-TM-5608 PDS2015-MUP-89-015W4; PDS2015-STP-15-016 PDS2015-ER-89-19-015I Cultural Resources Inventory April 2017 Mary Robbins-Wade Director of Cultural Resources Nicole Falvey Lead Agency: Staff Archaeologist County of San Diego Planning & Development Services 5510 Overland Avenue, Suite 310 San Diego, CA 92123 Project Proponent: Prepared by: Sweetwater Vistas LLC HELIX Environmental Planning, Inc. 1620 Fifth Avenue, Suite 400 7578 El Cajon Boulevard San Diego, CA 92101 La Mesa, CA 91942 CULTURAL RESOURCES INVENTORY: SWEETWATER VISTAS SAN DIEGO COUNTY, CALIFORNIA PDS2015-GPA-15-006, PDS2015-TM-5608, PDS2015-REZ-15-008, PDS2015-MUP-89-015W4, PDS2015-STP-15-016, PDS2015-ER-89-19-015I Lead Agency: County of San Diego Planning & Development Services Contact: Mark Slovick 5510 Overland Avenue, Suite 310 San Diego, CA 92123 (858) 694-2962 Preparer: Mary Robbins-Wade _______________________________ and Nicole Falvey _______________________________ HELIX Environmental Planning 7578 El Cajon Boulevard La Mesa, CA 91942 (619) 462-1515 Project Proponent: Terry R. Plowden Sweetwater Vistas LLC 1620 Fifth Avenue, Suite 400 San Diego, California 92101 619-906-4352 April 2017 HELIX Project No. DOW-05 NATIONAL ARCHAEOLOGICAL DATA BASE INFORMATION Authors: Mary Robbins-Wade and Nicole Falvey Consulting Firm: HELIX Environmental Planning, 7578 El Cajon Boulevard, La Mesa, CA 91942, (619) 462-1515 Client/Project Proponent: Terry R. Plowden, Sweetwater Vistas LLC, 1620 Fifth Avenue, San Diego, CA 92101, (619) 906-4352 Report Date: April 2017 Report Title: Cultural Resources Inventory: Sweetwater Vistas, San Diego County, California. PDS2015-GPA-15-006, PDS2015-TM-5608, PDS2015-REZ-15-008, PDS2015-MUP-89-015W4, PDS2015- STP-15-016, PDS2015-ER-89-19-015I Type of Study: Archaeological survey New Sites: None Updated Sites: CA-SDI-185 (P-000185), CA-SDI-19654 (P-37-030966) USGS Quadrangles: Jamul Mountains (7.5' series) Acreage: 52 acres Keywords: Positive archaeological survey; County of San Diego, Sweetwater Springs, Isham Springs; APNs 505-672-03, 07, 09, 10, 23, and 37 LIST OF ACRONYMS APN Assessor’s Parcel Number CEQA California Environmental Quality Act CRHR California Register of Historical Resources NAHC Native American Heritage Commission RPO Resource Protection Ordinance SCIC South Coastal Information Center SR State Route TABLE OF CONTENTS Section Title Page EXECUTIVE SUMMARY ...................................................................................................... ES-1 1.0 INTRODUCTION .............................................................................................................. 1 1.1 Project Description ..................................................................................................... 1 1.2 Existing Conditions .................................................................................................... 1 1.2.1 Environmental Setting ................................................................................... 1 1.2.2 Records Search Results ................................................................................ 11 1.3 Applicable Regulations ............................................................................................ 20 1.3.1 California Environmental Quality Act (CEQA) .......................................... 20 1.3.2 San Diego County Local Register of Historical Resources (Local Register) ........................................................................................... 23 1.3.3 San Diego County Resource Protection Ordinance (RPO) .......................... 23 2.0 GUIDELINES FOR DETERMINING IMPACT SIGNIFICANCE ................................ 27 3.0 ANALYSIS OF PROJECT EFFECTS ............................................................................. 29 3.1 Methods.................................................................................................................... 29 3.1.1 Survey Methods ........................................................................................... 29 3.1.2 Native American Participation/Consultation ............................................... 29 3.2 Results ...................................................................................................................... 29 3.2.1 Archaeological Resources ............................................................................ 29 3.2.2 Historic Resources ....................................................................................... 32 3.2.3 Native American Participation/Consultation ............................................... 32 4.0 INTERPRETATION OF RESOURCE IMPORTANCE AND IMPACT IDENTIFICATION........................................................................................................... 35 4.1 Resource Importance ............................................................................................... 35 4.1.1 Resource Importance – Archaeological and Native American Resources .. 35 4.1.2 Resource Importance – Historic Resources ................................................. 35 4.2 Impact identification ................................................................................................ 35 4.2.1 Impact Identification – Archaeological and Native American Resources ... 35 4.2.2 Impact Identification – Historic Resources .................................................. 36 5.0 MANAGEMENT CONSIDERATIONS – MITIGATION MEASURES AND DESIGN CONSIDERATIONS ........................................................................................ 39 6.0 REFERENCES ................................................................................................................. 43 7.0 LIST OF PREPARERS AND PERSONS AND ORGANIZATIONS CONTACTED .................................................................................................................. 50 8.0 LIST OF MITIGATION MEASURES AND DESIGN CONSIDERATIONS ................ 52 i TABLE OF CONTENTS (cont.) LIST OF FIGURES No. Title Page Figure 1 Regional Location Map .................................................................................................. 3 Figure 2 Project Vicinity Map (USGS Topography) .................................................................... 4 Figure 3 Site Plan .......................................................................................................................... 5 Figure 4 Locations of Cultural Resources .............................................. Confidential Appendix C Figure 5 Locations of Cultural Resources in Relation to Site Plan ........ Confidential Appendix C LIST OF TABLES No. Title Page Table 1 Cultural Resources Within 1-Mile Radius ................................................................... 12 Table 2 Previous Studies Within 1-Mile Radius ....................................................................... 13 Table 3 Cultural Resources Within The Sweetwater Vistas Project Area ............................... 30 Table 4 Summary of Impacts and Significance ........................................................................ 36 Table 5 Mitigation Measures and Design Considerations ........................................................ 52 CONFIDENTIAL APPENDICES (Bound Separately ‒ Not for Public Review) A Records Search Maps B Native American Correspondence C Locations of Cultural Resources D Site Records ii EXECUTIVE SUMMARY The Sweetwater Vistas project is located in the Spring Valley community of southern San Diego County. The project is located at the intersection of Jamacha Boulevard and Sweetwater Springs Boulevard. The applicant proposes to develop residential uses, and a large portion of the project site will be left in biological open space. A cultural resources study was undertaken by HELIX Environmental Planning, Inc. (HELIX) in 2015, including a review of previous studies of the project site, a records search, Sacred Lands File search, Native American outreach, and a field survey. Two archaeological sites were previously recorded within the project area: CA-SDI-185 and CA-SDI-19654. The latter site consists of two rock features that are of recent age (not historic). During the current survey, CA-SDI-19654 was found as previously recorded; it is located within a biological open space easement and would not be subject to project impacts. CA-SDI-185 is a large site that has been the subject of a number of past survey and testing efforts, although the mapping of the site is inconsistent and sometimes confusing. This site was determined by past studies to be a significant resource; however, the only portion of the site that remains is located within an open space easement placed over the Isham Springs historic site, which is a part of CA-SDI-185. No evidence of CA-SDI-185 was found within the project area during the current survey. The project area has been subject to a great deal of disturbance, which apparently destroyed the archaeological site, except the portion that remains in an open space easement outside the current project area. Given the cultural sensitivity of the general area and the possibility for subsurface remnants of CA-SDI-185, a monitoring program will be required during grading and other ground-disturbing activity. Cultural Resources Inventory: Sweetwater Vistas / DOW-05 / April 2017 ES-1 THIS PAGE INTENTIONALLY LEFT BLANK Cultural Resources Inventory: Sweetwater Vistas / DOW-05 / April 2017 ES-2 1.0 INTRODUCTION 1.1 Project Description The