Final Cultural Resources Technical Report Historic Significance Evaluation of Tie Line 649
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Final Cultural Resources Technical Report Historic Significance Evaluation of Tie Line 649 San Diego, California Submitted: March 2015 Updated: May 2015 This page intentionally left blank PREPARED FOR San Diego Gas and Electric Final 8315 Century Park Court San Diego, CA 92123 Cultural Resources Technical PREPARED BY Report: Historic Significance HDR, Inc. 8690 Balboa Avenue, Suite 200 Evaluation of Tie Line 649 San Diego, CA 92123 AUTHORS San Diego, California Paul Weishar Architectural Historian Marjorie Nowick, M.A. Architectural History Program Manager Amy Gusick, PhD, RPA Archaeology Program Manager Kristin Tennesen, M.A., RPA Project Director CLIENT San Diego Gas and Electric This page intentionally left blank Final Cultural Resources Technical Report: Historic Significance Evaluation of Tie Line 649 Table of Contents Contents Acronyms ...................................................................................................................................................... iii Management Summary ................................................................................................................................. v 1 Introduction .......................................................................................................................................... 1 1.1 Project Description .................................................................................................................... 1 1.2 Regulatory Setting ..................................................................................................................... 1 1.3 Project Personnel ...................................................................................................................... 2 2 Methods ............................................................................................................................................... 5 2.1 Evaluation Methods ................................................................................................................... 5 2.2 Field Methods .......................................................................................................................... 13 2.3 Research Methods .................................................................................................................. 13 3 Historic Context ................................................................................................................................. 15 3.1 Overview History of Electrical Service in San Diego County .................................................. 15 3.1.1 Introduction ................................................................................................................. 15 3.1.2 Early Gas and Electric Company Formation, 1881-1904........................................... 15 3.1.3 Expansion of Service.................................................................................................. 17 3.1.4 Electrical Distribution Growth, 1916–1940 ................................................................. 17 3.1.5 San Diego Gas and Electric Company, 1940-Today ................................................. 19 3.2 Historic Context of TL 649 Corridor ......................................................................................... 20 3.2.1 Chula Vista and San Ysidro ....................................................................................... 20 3.2.2 Otay Mesa .................................................................................................................. 23 3.3 Identified Historic Context Themes and Periods of Significance ............................................ 27 3.3.1 Community Development, Early Power Line Development of San Diego County (1916–1930)................................................................................................... 27 3.3.2 Community Development, World War II and Post-War Power Line Development of San Diego County (1941–1964) ...................................................... 28 3.3.3 Engineering, Early Twentieth Century Structural Innovations in Power Line Construction in San Diego County (1916–1930) ....................................................... 29 4 Architectural Description of TL 649 ................................................................................................... 31 5 Evaluation Criteria ............................................................................................................................. 35 5.1 National Register of Historic Places ........................................................................................ 35 5.2 California Register of Historic Resources ............................................................................... 36 5.3 Integrity .................................................................................................................................... 37 5.4 San Diego County Local Register of Historical Resources ..................................................... 38 5.5 County of San Diego Resource Protection Ordinance ............................................................ 38 5.6 California Environmental Quality Act ....................................................................................... 39 6 Eligibility Recommendations ............................................................................................................. 41 6.1 Integrity .................................................................................................................................... 41 6.2 National Register of Historic Places Significance Evaluation ................................................. 41 6.3 California Register of Historical Resources Significance Evaluation ...................................... 42 6.4 San Diego County Local Register of Historical Resources Evaluation ................................... 42 6.5 County of San Diego Resource Protection Ordinance Evaluation .......................................... 43 Updated: May 2015 | i Final Cultural Resources Technical Report: Historic Significance Evaluation of Tie Line 649 Table of Contents 6.6 California Environmental Quality Act Significance Criteria Evaluation ................................... 43 7 References ........................................................................................................................................ 45 Tables Table 2-1. List of Poles Analyzed for the Significance Evaluation ................................................................ 5 Figures Figure 1-1. General Project Location, San Diego County ............................................................................. 3 Figure 1-2. Location of TL 649 and Substations ........................................................................................... 4 Figure 2-1. Portion of TL 649 showing pole numbers. Poles included in sub sample have red numbers. Poles are symbolized by decade installed and modification. .......................................... 6 Figure 2-2. Portion of TL 649 showing pole numbers. Poles included in sub sample have red numbers. Poles are symbolized by decade installed and modification. .......................................... 7 Figure 2-3. Portion of TL 649 showing pole numbers. Poles included in sub sample have red numbers. Poles are symbolized by decade installed and modification. .......................................... 8 Figure 2-4. Portion of TL 649 showing pole numbers. Poles included in sub sample have red numbers. Poles are symbolized by decade installed and modification. .......................................... 9 Figure 2-5. Portion of TL 649 showing pole numbers. Poles included in sub sample have red numbers. Poles are symbolized by decade installed and modification. ........................................ 10 Figure 2-6. Portion of TL 649 showing pole numbers. Poles included in sub sample have red numbers. Poles are symbolized by decade installed and modification. ........................................ 11 Figure 2-7. Portion of TL 649 showing pole numbers. Poles included in sub sample have red numbers. Poles are symbolized by decade installed and modification. ........................................ 12 Figure 3-1. 1916 Pole Raising on Transmission Line Serving Otay Lakes (Engstrand and Crawford 1991:66). ........................................................................................................................ 21 Figure 3-2. 1916 Failure of the Lower Otay Dam (Hill 2002). ..................................................................... 21 Figure 3-3. Otay Mesa, circa 1946 .............................................................................................................. 24 Figure 3-4. Detail of 1955 USGS Topographic Map, San Diego ................................................................ 25 Figure 3-5. R. Lavador (CFE) and Jose Amezcua (SDG&E) Share Congratulations after Linkup at Border, March 4, 1983 (Courtesy SDG&E). ................................................................................... 26 Figure 4-1. Examples of Poles Analyzed for Significance Evaluation of TL 649 ........................................ 32 Figure 4-2. Substations Associated with TL 649......................................................................................... 33 Appendices Appendix A. Updated DPR Forms Appendix B. Resumes of Key Personnel Appendix C. List of Poles ii | Updated: May 2015 Final Cultural Resources Technical Report: Historic Significance Evaluation