Draft environmental impact report for the San Francisco's Public Utilities Commission's Lower Crystal Springs dam improvements project PDF
Preview Draft environmental impact report for the San Francisco's Public Utilities Commission's Lower Crystal Springs dam improvements project
2 SANFRANCISCOPUBLICLIBRARY March 2010 3 1223 08679 48 Draft Environmental Impact Report Volume 2 of 3 Appendices A through H For the San Francisco Public Utilities Commission's LOWER CRYSTAL SPRINGS DAM IMPROVEMENTS PROJECT San Francisco Planning Department Case No. 2006.0536E State Clearinghouse No. 2007012002 Draft EIR Publication Date: March 2, 2010 Public Hearing Date: April 6, 2010, Hillsborough Public Hearing Date: April 8, 2010, San Francisco Public Comment Period: March 2, 2010 to April 16, 2010 GOVERNMENT D REF City and County of San Francisco DOCUMENTS DEPT 627.86 San Francisco Planning Department L9532d MAR - 5 2010 v. SAN FRANCISCO PUBLIC LIBRARY 5/S San Francisco PublicLibrary Government Information Center San Francisco Public library 100 Larkin Street, 5th Floor SanFrancisco, CA 94102 REFERENCE BOOK Not to be taken from the Library March 2010 Draft Environmental Impact Report Volume 2 of 3 Appendices A through H For the San Francisco Public Utilities Commission's LOWER CRYSTAL SPRINGS DAM IMPROVEMENTS PROJECT San Francisco Planning Department Case No. 2006.0536E State Clearinghouse No. 2007012002 Draft EIR Publication Date: March 2, 2010 Public Hearing Date: April 6, 2010, Hillsborough Public Hearing Date: April 8, 2010, San Francisco Public Comment Period: March 2, 2010 to April 16, 2010 City and County of San Francisco San Francisco Planning Department 3 1223 08679 4816 TABLE OF CONTENTS Dam Lower Crystal Springs Improvements Draft EIR Page Volume 1 (bound separately) Acronyms and Glossary Summary 1. 2. Introduction and Background 3. ProjectDescription 4. Plans and Policies 5. Environmental Setting, Impacts, and Mitigation Measures 6. Mitigation Measures 7. OtherCEQA Issues 8. Alternatives 9. EIR Authors and Consultants Volume 2 AppendicesA through H A. Notice ofPreparation A-l B. NOP Comments and Scoping HearingTranscript B-l C. LCSDI ProjectOperationsMemo C-l D. WSIP WaterSupply Impacts and MitigationMeasures D-l E. WSIP PEIR MitigationMeasures, Applicability to the Proposed Project E-l F. Historic Context, Architectural and Archaeological Survey Report F-l G. Supporting Documentation forAirQuality Analysis G-l H. Wetland Determination Report H-l Volume 3 (bound separately) H M Appendices through H. Wetland DeterminationReport (continued) I. Biological Resources Technical Report SupportingDocumentation forVegetation/Habitat Impacts J. K. FishHabitatSurveysforLCSDI L. Blasting/Noise Impacts on Fish M. SupportingDocumentation forHydrology Analysis LowerCrystalSpringsDamImprovementsProject i MEACaseNo.20O6.O536E DraftEIR March2010 Digitized by the Internet Archive 2014 in https://archive.org/details/draftenvironmen2010sanf_0 APPENDIX A Notice of Preparation LowerCrystalSpringsDamImprovementsProject A-1 MEACaseNo.2006.0536E DraftEIR March2010 THIS PAGE INTENTIONALLY LEFT BLANK A-2 PLANNING DEPARTMENT City and CountyofSan Francisco • 1660 Mission Street, Suite500 • San Francisco, California • 94103-2414 MAINNUMBER DIRECTOR'SOFFICE ZONINGADMINISTRATOR PLANNINGINFORMATION COMMISSIONCALENDAR mjictor™ PHONE:558-6411 PHONE:558-6350 PHONE:558-6377 INFO:55X-M22 4THFLOOR 5THFLOOR MAJORENVIRONMENTAL INTERNETWEBSITE FAX:558-6426 FAX:558-6409 FAX:558-5991 WWW.SFGOVORG/PLANNING January 2, 2007 To Responsible Agencies, Trustee Agencies, and Interested Parties: RE: CASE NO. 2006.0536E- LOWER CRYSTAL SPRINGS DAM IMPROVEMENTS PROJECT NOTICE OF PREPARATION OF AN ENVIRONMENTAL IMPACT REPORT AND NOTICE OF PUBLIC SCOPING MEETING A Notice ofPreparation (NOP) ofan environmental impact report (EIR) pursuant to the California Environmental Quality Act (CEQA) and aNotice ofthe Public Scoping Meeting for the above-referenced project, describedbelow, has been issued by the San Francisco Planning Department. The NOP and Notice ofPublic Scoping Meeting is eitherattached oris available upon request from Erik Olafsson, whom you may reach at (415) 558-5973, voice; (415) 558-5991, fax; [email protected], email; orby mail at 1660 Mission Street, Suite 500, San Francisco, CA 94103-2414. The combined NOP/Notice ofPublic Scoping Meeting will also be available online at http://www.sfgov.org/planning/mea and www.sfwater.org (click Waterat the left ofthe screen, click Peninsula Region, click Lower Crystal Springs Dam Improvements.). Project Description: The Proposed Project includes modification by the SFPUC ofthe existing Lower Crystal Springs Dam (the Dam), which is owned and operated by the San Francisco Public Utilities Commission (SFPUC). The proposed improvements are intended to comply with State ofCalifornia, Department ofWater Resources, Division ofSafety ofDams (DSOD) requirements to guard against failure from a Probable Maximum Flood (PMF)' event, which could result in flow overtopping causing erosion of the dam abutments. Until the Dam is modified, the SFPUC is required by DSOD to restrict the reservoir operating level to no higherthan the crest ofthe spillway. This restriction has resulted in a 16 percent loss of water storage capacity in the reservoir. The proposed improvements would allow SFPUC to restore operation to its historic permissible level. The Proposed Project includes the following major components: • widening the spillway from 88 feet to approximately 208 feet • installing anew integral ogee weir • raising the parapet wall by approximately 9 feet • improving drainage at the top ofthe Dam • expanding the stillingbasin from 12 feetby 90 feet to approximately 105 feet by 145 feet • installing erosion control measures (e.g. riprap) within and along the banks ofSan Mateo Creek downstream ofthe expanded stilling basin • constructing an instrumentation building and parking lot adjacent to the Dam • restoring operating reservoir levels to historic permissible maximums • constructingaccess paths between the instrumentation building and the Dam Probable maximum flood (PMF) isthe largest flood that may reasonably be expected to occur from the most severe combinationofcritical meteorologic and hydrologic conditionsthat are reasonably possible on the watershed CaseNo.2006.0536E Page i LowerCrystal Springs Dam NoticeofPreparation Improvements Project A-3 The San Francisco Planning Department's Major Environmental Analysis Division (MEA) is preparing an EIR for consideration by decision-makers priorto a final decision by the SFPUC regarding whetherto approve and implement the Proposed Project. The purpose ofthe EIR is to provide information about potentially significant adverse environmental effects ofthe Proposed Project, to identifypossible ways to minimize those potentially significant adverse effects, and to describe and evaluate feasible alternatives to the Proposed Project. Preparation ofan NOP or EIR does not indicate a decision by the City to approve orto disapprove the Proposed Project. However, priorto making any such decision, the decision makers must review and considerthe information contained in the EIR. The San Francisco Planning Department will hold one PUBLIC SCOPING MEETING at the location, date, and time listed below. The purpose ofthis meeting is to receive oral comments to assist the San Francisco Planning Department in reviewing the scope and focus ofthe Proposed Project's environmental impact analysis and information to be contained in the EIR. Written comments will also be accepted at this meeting and until the close ofbusiness on February 1, 2007. Written comments should be sent to the San Francisco Planning Department, Attn: Paul Maltzer, Environmental Review Officer, Lower Crystal Springs Dam Improvements Project EIR, 1660 Mission Street, Suite 500, San Francisco, CA 94103-2414, or provided via email to [email protected], orby fax to (415) 558-5991. Information on how to use public transportation to get to the scoping meeting can be found at: www.transitinfo.org/tripplanner. Scoping Meeting January 18, 2007 6:30 p.m. Startingpromptly South Hillsborough Elementary School 303 El Cerrito Avenue Hillsborough, California Ifyou work for an agency that is a Responsible or Trustee Agency, we need to know the views ofyour agency as to the scope and content ofthe environmental information that is relevant to your agency's statutory responsibilities in connection with the Proposed Project. Youragency may need to use the EIR when considering a permit or otherapproval forthis project. We will also need the name ofthe contact person for your agency. Ifyou have questions concerning environmental review ofthe Proposed Project under CEQA, please contact Erik Olafsson at (415) 558-5973. Case No. 2006.0536E Page ii LowerCrystal SpringsDam NoticeofPreparation ImprovementsProject A-4
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