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Western Area Power Administration Desert Southwest Region's FINAL Western Area Power Administration Desert Southwest Region’s Facilities Historic Context Statement Edited by Lisa M. Meyer September 2014 FINAL Western Area Power Administration Desert Southwest Region’s Facilities Historic Context Edited by Lisa M. Meyer September 2014 DSW Region’s Facilities Historic Context Statement CONTENTS Contents Executive Summary ................................................................................................................... ES-1 1. Introduction ........................................................................................................................... 1-1 Purpose and Need .................................................................................................................. 1-1 Data Sources Consulted ......................................................................................................... 1-5 Current Document ................................................................................................................. 1-8 2. Statement of Context Part 1: DSW Region’s Transmission Power Systems………………………………………… ...................................................................................... 2-1 Temporal Context .................................................................................................................. 2-1 Geographic Context ............................................................................................................... 2-1 Historic Context ..................................................................................................................... 2-2 3. Statement of Context Part 2: DSW Region’s Transmission Power Systems ....................... 3-1 Boulder Canyon Power System (Period of Significance 1930-1952) .............................. 3-1 Parker-Davis Power System (Period of Significance 1934-1954) ........................................ 3-19 Colorado River Storage Power System – Southern Division (Period of Significance 1956- 1967) ............................................................................................................................... 3-63 Colorado River Front Work and Levee System (Period of Significance 1964-1965) ........... 3-74 Intertie Power System (Period of Significance 1964-1975) ................................................. 3-81 Central Arizona Power System (Period of Significance 1973-1994) .................................... 3-89 Colorado River Basin Salinity Control (Period of Significance 1978-1983) ........................ 3-100 4. Statement of Context Part 3: Transmission System Technology Development and Design Standards .............................................................................................................. 4-1 Electrical Power Transmission ............................................................................................... 4-1 The Transmission System: Power Transmission Structures .................................................. 4-2 The Distribution System: Substations .................................................................................. 4-14 Design Standards ................................................................................................................. 4-17 5. Statement of Context Part 4: Associated Property Types and Character Defining Features .............................................................................................................. 5-1 Transmission Power Systems and Associated Property Types .............................................. 5-1 6. Guidance for Evaluating DSW Region’s Transmission Power Systems for NRHP Listing ............................................................................................................. 6-1 Evaluation Variables ............................................................................................................. 6-1 Evaluating DSW Region’s Transmission Power System as Individual Historic Districts ....... 6-5 Evaluating DSW Region’s Transmission Power Systems as Individually Contributing Properties ......................................................................................................................... 6-8 Summary ............................................................................................................................. 6-13 i DSW Region’s Facilities Historic Context Statement CONTENTS 7. Management Considerations for Western’s DSW Region’s Transmission Power Systems .......................................................................................................................... 7-1 Consideration of Infrastructure Requiring Repair and Upgrade ........................................... 7-1 Consideration of Infrastructure Redundancy of Standardized Elements .............................. 7-2 Recommendations for Further Documentation and Evaluation ........................................... 7-3 Conclusion….. ......................................................................................................................... 7-4 8. Bibliography ........................................................................................................................... 8-1 9. Glossary ................................................................................................................................. 9-1 TABLES Table 1-1. Example of DSW’s GIS Data Available for Transmission Lines ..................................... 1-7 Table 2-1. Reclamation Projects Authorized, 1903-1907 ........................................................ 2-4 Table 2-2. Major Transmission Lines Constructed to Convey Hydroelectric Power in the United States, by Owner, 1901-1915 ............................................................... 2-5 Table 3-1. Hoover Dam Transformer Circuits .......................................................................... 3-6 Table 3-2. Transmission Lines – Boulder Canyon Power System .......................................... 3-10 Table 3-3. Substations – Boulder Canyon Power System ...................................................... 3-18 Table 3-4. Transmission Lines – Parker-Davis Power System ................................................ 3-34 Table 3-5. Substations – Parker-Davis Power System ........................................................... 3-58 Table 3-6. Transmission Lines – Colorado River Storage Project Power System ................... 3-69 Table 3-7. Substations – Colorado River Storage Project Power System .............................. 3-73 Table 3-8. Transmission Lines – Colorado River Front Work and Levee System ................... 3-78 Table 3-9. Substations – Colorado River Front Work and Levee System .............................. 3-80 Table 3-10. Transmission Lines – Intertie Power System ........................................................ 3-86 Table 3-11. Substations – Intertie Power System .................................................................... 3-88 Table 3-12. Pumping Plants in the Central Arizona Power System ......................................... 3-93 Table 3-13. Transmission Lines – Central Arizona Power System ........................................... 3-95 Table 3-14. Substations – Central Arizona Power System ....................................................... 3-99 Table 3-15. Transmission Lines – Colorado River Basin Salinity Control Project ................... 3-104 Table 3-16. Substations – Colorado River Basin Salinity Control Project Power System ...... 3-106 Table 4-1. Reclamation Nomenclature for Single Wood Pole Structures ............................... 4-3 Table 4-2. Letter System Developed by Reclamation for its Steel Structures ......................... 4-7 Table 6-1. DSW Region’s Transmission Power Systems Periods of Significance ..................... 6-2 FIGURES Figure 1-1. Overview ................................................................................................................. 1-3 Figure 3-1. Boulder Canyon Power System ............................................................................... 3-3 ii DSW Region’s Facilities Historic Context Statement CONTENTS Figure 3-2. Hoover Dam Overview 1 (Rothstein 1940) ............................................................. 3-5 Figure 3-3. Hoover Dam Overview 2 (Adams 1941) ................................................................. 3-5 Figure 3-4. Los Angeles Substation (Dobson-Brown 2001) ..................................................... 3-14 Figure 3-5. Parker-Davis Power System .................................................................................. 3-21 Figure 3-6. Parker Dam (Lowe 1998) ...................................................................................... 3-23 Figure 3-7. Davis Dam (O’Rear 1972) ...................................................................................... 3-24 Figure 3-8. Parker Switchyard ................................................................................................. 3-53 Figure 3-9. Colorado River Storage Power System ................................................................. 3-65 Figure 3-10. Glen Canyon Dam (Mehlführer 2008) .................................................................. 3-67 Figure 3-11. Colorado River Front and Levee System ............................................................... 3-75 Figure 3-12. Senator Wash Dam ............................................................................................... 3-77 Figure 3-13. Intertie Power
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