Los Angeles Metro Westside Subway Extension
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This is a Draft Document Utility Conflicts Report Los Angeles Metro Westside Subway Extension Participants on this Report: Prepared By: PB America Inc.: Zafer Mudar, PE (commentaries) D'Leon Consulting Engineers Jose Varias 3605 Long Beach Blvd., Suite 235 Long Beach, CA 90807 D'Leon Consulting Engineers: T:(562)989-4500 / F: (562)989-4509 Domingo Leon, PE Email: [email protected] Sara Samaan Dung Quang Nguyen June 2014 Table of Contents 1. Executive Summary...................................................................................................................................................1 History and Background of the Westside Subway Extension Project ..............................................................1 Purpose and Need for Transit Improvements in the Study Area ......................................................................4 Alternatives Before Scoping Period .................................................................................................................6 Alternatives Considered in the Draft EIS/EIR................................................................................................11 2. Existing Utilities along Wilshire Blvd. Corridor at: La Brea Blvd, Fairfax Blvd, La Cienega Blvd. (Underground Stations).......................................................................................................................................................................27 Composite Existing Utilities - Description.....................................................................................................29 Total Lengths of Utility Line Types ...............................................................................................................50 Composite Utility Drawings - Existing ..........................................................................................................54 3. Station Drawings .....................................................................................................................................................63 La Brea Station Drawings .............................................................................................................................64 Fairfax Station Drawings...............................................................................................................................71 La Cienega Station Drawings........................................................................................................................79 4. Relocated Utilities ...................................................................................................................................................86 Composite Relocated Utilities - Description ..................................................................................................86 Composite Utility Drawings - Relocation ......................................................................................................91 5. Potholing Program.................................................................................................................................................101 6. Potholing Work Plan Prepared for the City of Los Angeles..................................................................................142 7. Potholing Plan Findings.........................................................................................................................................222 8. Conclusion.............................................................................................................................................................250 9. Working Notes.......................................................................................................................................................252 Executive Summary 1. Executive Summary Resumption of Subway Planning The U.S. Department of Transportation Federal In October 2005, at the request of Metro and the Transit Administration (FTA) and the Los Angeles Mayor of the City of Los Angeles, the American County Metropolitan Transportation Authority Public Transportation Association (APTA) conducted (Metro) are undertaking the Los Angeles Westside a Peer Review to reconsider the feasibility of Subway Extension Project (Project) that would tunneling along the federally precluded Wilshire extend the Metro Purple Line/Metro Red Line heavy Boulevard segment of the Westside Corridor. As a rail subway system from its current western termini result of this review, which concluded that tunnels at Wilshire /Western Station (Metro Purple Line) and could be safely constructed and operated along Hollywood/Highland Station (Metro Red Line) to a Wilshire Boulevard due to advances in new tunnel new western terminus. construction methods that were previously unavailable, legislation was enacted in Congress History and Background of the repealing the Federal prohibition on subway funding Westside Subway Extension Project in December 2007. Metro’s Westside Subway Extension has been an Alternatives Analysis integral element of local, regional, and Federal transportation planning since the early 1980s. Chapter 2 of the Draft Environmental Impact Extending westward from the Los Angeles Central Statement/Environmental Impact Report (EIS/EIR) Business District (CBD), the Westside Subway for new transit projects discusses Alternatives Extension has been the subject of in-depth technical Analysis (AA); a study for all reasonable fixed- studies and extensive community involvement during guideway alternative alignments and transit this period. The transit investment has historically technologies including heavy rail subway been envisioned to extend toward Beverly Hills, alternatives, which was initiated in 2007. Century City, Westwood (the University of California, Los Angeles (UCLA)), West Los The FTA issued an Early Scoping Notice in the Angeles, and Santa Monica just off the Pacific Federal Register on October 1, 2007, to help define Ocean. the appropriate range of issues and alternatives to be addressed in the AA Study. Suspension of Early Subway Planning The AA Study evaluated alignment and transit technology alternatives within the Study Area. After In the early 1990s, plans were underway to extend the alternatives evaluation in the AA Study, two the Metro rail subway to the Westside. Construction alternatives were recommended for further was underway on the Metro Red Line from Union consideration in the Draft EIS/EIR. These two Station to Wilshire/Western Station and to Holly- alternatives best met the Purpose and Need while wood. Environmental clearance and a Full Funding having the fewest environmental impacts. The Grant Agreement (FFGA) were completed to extend alternatives were: (1) Extend the Metro Purple Line the subway from Wilshire/Western to Pico/San Subway via Wilshire Boulevard to Santa Monica, and Vicente at this time. The subway alignment was to (2) Extend the Metro Purple Line Subway via have deviated south of Wilshire Boulevard to avoid Wilshire Boulevard to Santa Monica plus extend a federally prohibited methane gas hazard zone (a zone subway from the Metro Red Line Subway that was designated in 1985 after naturally occurring Hollywood/ Highland Station via Santa Monica methane gas caused a fire in the Fairfax District). Boulevard to connect with the Wilshire line. The planning for a subway in this corridor was later The alternative alignments studied during the AA suspended in 1998 due to a lack of funding, including process were generally located along roadway rights- a ballot initiative that prohibited local funds from of-way that could reasonably be used in an at-grade, being used for subway construction. elevated, or subway configuration. Four technologies were presented and analyzed in the AA Study— heavy rail transit (HRT), light rail transit (LRT), bus rapid transit (BRT), and monorail. The ridership 1 Executive Summary analysis demonstrated a need for a technology that Draft EIS/EIR Study Process could provide a capacity of more than 700 passengers per train set to accommodate the high-capacity peak The FTA and Metro prepared the Draft EIS/EIR for period loading along the Wilshire and Santa Monica the Westside Subway Extension in Los Angeles, alignments. HRT was identified as the preferred California. The FTA is the lead agency for the technology for further study because it has the National Environmental Policy Act (NEPA), and capacity to meet the anticipated ridership demand and Metro is the lead agency for the California limit the number of transfers. Environmental Quality Act (CEQA). In January 2009, the Metro Board approved the The Draft EIS/EIR defines the Purpose and Need of Westside Subway Extension Project AA Study and the Project and describes and evaluates the authorized preparation of the Draft EIS/EIR. After alternatives, including a No Build Alternative and a the release of the Draft EIS/EIR, public hearing took relatively low-cost Transportation System place for selecting a locally preferred alternative and Management (TSM) Alternative. The Draft EIS/EIR Metro would apply for entry into FTA’s Preliminary documents the evaluation of the potential Engineering (PE) Phase. transportation and environmental impacts and benefits, mitigation measures, operating and Following the entry into the FTA PE Phase, the Final maintenance and capital costs, and potential funding EIS/EIR would be prepared at the New Starts PE sources for the alternatives. It also includes a level of engineering.