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HomeMy WebLinkAboutMINUTES - 10012002 - D2 D.2; THE BOARD OF SUPERVISORS OF CONTRA COSTA COUNTY, CALIFORNIA Adopted this Order on October 1, 2002, by the following vote. AYES: Supervisors Uilkema, Gerber, DeSaulnier, Glover & Gioia' NOES None ABSENT: None ABSTAIN: None SUBJECT': Report on the BART Seismic Retrofit Band Program REMOVED from agenda today 1 hereby certify that this is a true and..correct copy of an action taken and entered on the minutes of the Board of Supervisors on the date shown, Attested': October 1,2002 John Sweeten, Clerk of the Board Of Supervisors and County Administrator Deputy Clerk TO: BOARD MJF SUPERVISORS Contra FROM: TRANSPORTATION, WATER AND INFRASTRUCTURE .' _'.-' ' Costa COMMITTEE (SUPERVISOR DONNA GERBER, CHAIR) County 4 DATE: July 29, 2002 SUBJECT: Re ort on the BART Seismic Retrofit Bond Program SPECIFIC RE00EST(S) OR RECOMMENDATION(S) & BACKGROUND AND JUSTIFICATION RECOMMENDATIONS CONSIDER whether to adopt a position on Measure BB proposed by the BART District for the November'2002 ballot to help fund their seismic retrofit program. FISCAL IMPACT None. BACKGROUND/REASONS FOR RECOMMENDATIONS On July 23, 2002, the Board of Supervisors referred to the Transportation'Water and Infrastructure Committee(Committee'), a request by the BART District to update the Board on their seismic retrofit activities. On July 29, representatives of BART mot with the Committee and presented information on their efforts to ',upgrade BART facilities to withstand earthquakes.` They announced that their Board of Directors had approved placing Measure BB on the November 2002 ballet to help fund seismic retrofit construction on the existing BART system. Measure BB would authorize the BART District to issue $1.05 billion in bonds to be repaid by property tax revenue from property owners in the three counties of the District. The average property tax assessment would be $7.80 per $100,000 of assessed property value. CONTINUED ON'ATTACHMENT: X YES RECOMMENDATION OF COUNTY ADMINISTRATOR X RECOMMENDATION OF BOARD COMMITTEE APPROVE OTHER SIGNATURES) Supervisor Donna Gerber Supervisor Federal D. Glover ACTION OF BOARD ON APPROVED AS RECOMMENDED OTHER VOTE OF SUPERVISORS HEREBY CERTIFY THAT THIS IS A TRUE UNANIMOUS (ABSENT ) AND CORRECT COPY OF AN ACTION TAKEN' AYES: NOES:: AND ENTERED ON THE MINUTES OF THE ABSENT: ABSTAIN: BOARD OF SUPERVISORS ON THE DATE SHOWN. Contact: Steven'Goetz (925/335-1240) cc: Community Development Department (CDD) ATTESTED' BART (via CDD) JOHN SWEETEN, CLERK OF THE BOARD OF SUPERVISORS AND COUNTY ADMINISTRATOR' BY , DEPUTY G:\Transpottation\Steve\bo\draft\bart.seismic.bo.doc Report on the BART Seismic Retrofit Program July 29,2002' Page 2 BACKGROUND/REASONS FOR RECOMMENDATIONS (continued) During their presentation, BART staff clarified that putting the BART bond measure on the Centra Costa ballot will be handled by the County Clerk who will make a request to the Board to schedule an consolidated election on various issues in November, including the BART bond measure. This would be a ministerial act of the Board of Supervisors,which is exempt from the California Environmental 1 Quality Act regulations. The Committee requested County staff to schedule the Committee's report on the Seismic Retrofit Program to the Board of Supervisors prior to the November',election, and to request representatives of the BART District to participate in that report. Enclosed with this report is a Fact Sheet on the BART Seismic Retrofit Program (Exhibit A). Also included is a Fact Sheet on Measure BB'(Exhibit B). Representatives of BART will provide the Board with a presentation on their Seismic Retrofit Program at your October 1, 2002 meeting. Exhibit A: Fact Sheet on the BART Seismic Retrofit Program Exhibit B: Fact Sheet on Measure BB. EXHIBIT A 8 A R T' I Ids A !Vital Transportation System System Elements The Bay Area Rapid Transit system(BART)is one The Seismic Retrofit Program addresses the of the San Francisco Bay Area's most vitaloriginal system completed in 19`72,comprised of transportation links,carrying more.than.32.5,000 34.stations(11 aerial,14 subway,and 9 at-grade) riders everyday and about 45 of all people and 74 milesof track,with a service area span- crossing Sart Francisca Bay. BARTs success in Hing three counties (San Francisca,Alameda, and maintaining;continuous service directly after the Contra Costa). In addition to station and track Loma Prieta earthquake of 1989 reconfirmed the elements, the original BART system includes sev- system's importance to the overall well-being and eral train maintenance yards,terminal/operations mobility of people in the Bay Area. However, facilities,and system-related buildings,as well as Loma Prieta(centered more than 50 miles south of power,mechanical,train control,.and communi- San:Francisco)may not have been-the biggest test cations equipment. System extensions built since of BART's ability to withstand seismic impact. 1972 employed more stringent and up-to-date Recent studies predict a high probability of a larger seismic criteria than the original system,and taus earthquake hitting the Bay Area within the next 30 do not require retrofit. years. Numerous faults are located in the Bay Area and each has the potential to produce earth- quakes (see BART Service Area with fault Locations reap to right). ' Program Purpose and Benefits Because of the importance of the system and the 4 likelihood it will be subject to a major earthquake, y " BART has initiated the Seismic Retrofit Program. The program will improve the systems ability to withstand a major earthquake,resulting in increased safety for the public and employees and , enabling the system to return to service as q�.uckly as possible. This will be accomplished by .. Y upgrading the structural integrity of vulnerable portions of the systemm using the latest seismic � standards while maintaining operations during' retrofit construction ` BART Service Area with FsO Lwatlons SEISMIC RETROFIT BUILDING A STRONGER SYSTEM Systernwide Vulnerability Study One of the first andmost critical.undertakirigs of the . program is a systemwide vulnerability study,a assessment of how system components would perform n� Iatrath�aet during a major earthquake. Retrofith�e$s#e iii Through comprehensiveON ti " xisnsions modeling of structures and local geologic conditions, ' BART is developing predic 4 tions of the likely damage from potential earthquakes. From these predictions come recommended retrofit approaches that would enable development of cost effective retrofit solutions for the BART system. BART Seismic Retrofit Program Phases Vulnerability study data will allow potential retrofit consultants to develop Sgismic Program Phases design concepts,cost estimates,and schedules. Current program plans call for components of the original BART system to be seismically retrofitted Potential Retrofit Features in four phases based on their vulnerability and The Seismic Retrofit Program will examine potential operational priority. Priorities include areas strengthening of major BART facilities including: that serve tl-te greatest nurnbers of passengers; connectmom-is to other modes of transportation; Aerial guideways by enlarging foundations, and significance to the regional economy, adding foundation piles,and jacketing concrete 1'l-lase 1,Segment 1 (the area from the Berkeley bridge columns; Hills Tunnel to Montgomx xy Station in San Stations by strengthening foundations,beams, Francisco)will be the'first;area retrofitted.Later columns,and connections; phases are currently planned as shown on . The Transbay Tuba by improving the surround- the BART Seisnv.e ing soil,improving;the seismic joints,and Retrofit Program Phases � stabilizing ventilation structures,and map above. Electrical and mechanical equipment and facilities by adding additional anchoring for Further InfDrrnit+C3r1 equipment,cable.trays;ductwork,and other BART is initiating a proactive community relations components.. program to Deep local neighborhoods and agencies aware of program-related information and activi- ties in their areas and respond to neighborhood issues in a timely manner,For more information about the BART Seismic Retrofit Program,contact • Catherii-ie Westphal)at 51.0,464.7595 or visit SEISMIC RETROFIT wwsu.bart.gov. BUILDING A STRONGER SYSTEM EXHIBIT Measure BB GO Bond Measure on ;November 5, 2002 Ballet To Fund BART Earthquake RetrofitProgram FACT SHEET Overview On July 25, 2002,the BART Beard of Directors voted to }dace a $1.050 billion General Obligation .(GO) Bond issue on the November 5 2002 ballot in Alameda, Contra Geeta and San Francisca Counties to fund a critical seismic retrofit program. The measure requires a two-thirds aggregate majority vote in the three BART counties. The bonds would:.be repaid by a property tax assessment . over approximately 40-years, Background This is the first band issue that BART has placed on the ballot since 1902 when Alameda, Contra Crista and San Francisco voters passed a $792 million GO Bond measure to pay for the acquisition, design and construction of the original 71.5-mile„ 34-station core system. BART first opened for service in September 1972. Since then, approximately 30 miles of extensions and nine stations, including the San Francisco Airport Extension, have been added, all built to much higher seismic design standards than the original core system. The GO bonds funded by the 1982 measure were, retired in June 1999 and the supporting property tax discontinued. Earthquake Retrofitting a Crucial Safety Measure- Although BART is still sate to ride, earthquake improvements are necessary to ensure a higher level of safety, safeguard the substantial public investment it) BART, which has an estimated value of arty $13 billion; minimize disruption of service.and allow for a prompt return to service in the event ur°a major earthquake, Loma Prieta 'Tested BART Post-Quake Performance BART's original seismic design criteria was state-of-the-art for its time. Its stability not only helped 'he system withstand the forces of the 1089 Lorna Prieta earthquake intact, but it enabled BART to -esume service within hours and serve as a key transportation "lifeline"'during the time that the Bay 3ridge and Cypress Freeway were shut dawn and undergoing extensive repairs. Major Quake Could Hit Closer to Bay Area's Urban Care _oma Prieta's'epicenter was 50 miles south of San Francisco. A U.S. Geological Survey statistical inalysis predicts a 70 percent probability that a major,earthquake will occur on the Hayward Fault )efore the year 2039. The Hayward'Fault is of particular concern because of its close proximity to 3ART's facilities: .arthquak+e Design Standards Substantially Improved Jew Information gleaned from studies of the 1994 Northridge, California and 1995 Kobe, Japan !arthquakes, along with expanded computer analysis tools, provide today's engineers with an nhanced understanding of the effect of earthquakes on structures. This has advanced the evelopment of damage mitigating design techniques that were not available to earlier designers. TART Seismic Vulnerability Study Highlights Immediate Retrofit Needs rite the system's reliability since its inception, following the Loma Prieta earthquake;:BART m�.wated several studies to evaluate the system's earthquake safety. BART also incorporated the test seismic design standards in building its new extensions. In September'2000, BART launched a _' -. comprehensive Seismic Retrofit Study & Program aimed at strengthening the BART system ahead of a highly probable major future.earthquake. A recently completed BART Seisrnic.VulAerability Study highlights the need to begin reinforcement work'immediately. The study's findings identified elements of the existing BART system most susceptible to earthquake damage and/or failure, including the Transbay Tube and aerial structures. Transbay Tube and Aerial Structures Identified as Particularly Vulnerable • The soil surrounding the Transbay Tube could undergo a process called liquefaction,which, in a, worst-case scenario, could cause the Tube to fail • Severe earthquake loads may cause aerial structure foundations to rock and sway and possibly fail altogether. Without Retrofits, Drastic Reductions in Ridership Predicted During Repairs According to the Vulnerability Study, absent any retrofitting to the existing BART system, a major earthquake on the Hayward fault, centered in Oakland, would likely severely limit the system's ability to transport riders for a long period of time while repairs are made. Specifically, the study indicates that without the retrofit work, it would take roughly one and one-half years to''return to 50% of pre- earthquake ridership levels and at least two years to achieve 97% of pre-earthquake ridership'IeveIs. Independent Expert Peer Review' The Expert Peer Review Panel,which included:worldrenowned engineers and seismologists and participation by the California'Seismic Safety Commission, completely concurred with the Study's findings and recommended that retrofit work begin immediately. First Priority: Retrofitting the Transbay Tube BART's Seismic Retrofit Program will upgrade the earthquake resistance of the BART system using the latest seismic design criteria. The Program will focus first on adjustments to th'eTransbay Tube; then address aerial structures, other trackway, station structures and District"facilities. Conceptual Budget Estimate Aerial Trackway Structures $610,000,000 Underground Trackway Structures & Transbay Tube 285,000,000 At-Grade Trackway Structures 23,000,000 Stations 167,000,000 Administrative, Maintenance & Operations Facilities 60,000,000 SUBTOTAL SEISMIC RETROFIT`PROGRAM $1,145,000,000 Estimated Construction Period BART anticipates'that the Seismic Retrofit Program will be implemented in four segments over a 10- year pe beginning in FY 2004 and concluding in FY2013. Estimated Cost to Property Owners The average property tax assessment would be $7.80 per $100,000 of assessed property value. BARTrs Seismic Retrofit Program is designed to improve the system's safety, ensure operability after a major earthquake and preserve the vitality of a transportation system critical to the Say Area's quality of life and economic strength.