6. PUBLIC COMMENTS (This section of the agenda is for audience comments on items NOT on this agenda)

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1 AGENDA SPECIAL MEETING OF THE INFRASTRUCTURE MANAGEMENT ADVISORY COMMITTEE FEBRUARY 28, 2018 HESSE PARK COMMUNITY PARK HAWTHORNE BOULEVARD, RANCHO PALOS VERDES 6:00 P.M. 1. CALL TO ORDER 2. ROLL CALL 3. FLAG SALUTE 4. APPROVAL OF AGENDA 5. CHAIR S COMMUNICATION (5 minutes) 6. PUBLIC COMMENTS (This section of the agenda is for audience comments on items NOT on this agenda) 7. UNFINISHED BUSINESS (a) Draft Portuguese Bend Landslide Feasibility Study- Continue discussion on member thoughts and comments in preparation for a response to be presented to the City Council. (60 minutes) Recommendation: Receive and provide official input as a Committee to the City Council. 8. NEW BUSINESS (a) Presentation and Discussion of Prioritization Method Used by PW Staff for FY Capital Projects Funded by CIP Reserves- Public Works Director Sassoon and Finance Deputy Director Nguyen will present the criteria used to prioritize projects. (20 minutes) Recommendation: Receive and provide input. IMAC Agenda February 28, 2018 Page 1 of 2

2 (b) Process to Gather IMAC Member Project Prioritization Inputs- Staff and Chair Spain will demonstrate the process of gathering member inputs. (15 minutes) Recommendation: Receive and provide feedback. 9. ADJOURNMENT Adjourn to a time and place certain only if the Committee wishes to meet prior to the next regular meeting. The Infrastructure Management Advisory Committee may be contacted through the listed below. Please note that Committee Members are precluded from responding to All as that would be in violation of the Brown Act. Website IMAC@RPVCA.GOV In case you have questions or observe a non-emergency condition on our roads, trails or city parks that is damaged or needs to be repaired, the City of Rancho Palos Verdes Public Works Department can be reached at: Telephone (310) Website PublicWorks@RPVCA.GOV American with Disabilities Act: In compliance with the Americans with Disabilities Act of 1990, if you require a disability-related modification or accommodation to attend or participate in this meeting, including auxiliary aids or services, please call Lauren Ramezani (310) at least 48 hours prior to the meeting. NOTE: Staff reports are available for inspection at City Hall, Hawthorne Boulevard, during regular business hours, 7:30 A.M. to 5:30 P.M. Monday Thursday and 7:30 A.M. to 4:30 P.M. on Friday. The agenda can also be viewed at Hesse Community Park, Hawthorne Boulevard, during regular business hours: Monday Friday from 9:00 A.M. until dusk; Saturday and Sunday from 10:00 A.M. until dusk. Written materials, including s, submitted to the City are public records and may be posted on the City s website. In addition, City meetings may be televised and may be accessed through the City's website. Accordingly, you may wish to omit personal information from your oral presentation or written materials as it may become part of the public record regarding an agendized item. Materials related to an item on this Agenda submitted to the IMAC after distribution of the agenda packet are available for public inspection at the front counter of the lobby of the City Hall, Hawthorne Boulevard, Rancho Palos Verdes during normal business hours. You can also view the agenda and staff reports at the City s website IMAC Agenda February 28, 2018 Page 2 of 2

3 MEMORANDUM RANCHO PALOS VERDES DATE: FEBRUARY 28, 2018 TO: FROM: CHAIR SPAIN AND MEMBERS OF THE INFRASTRUCTURE MANAGEMENT ADVISORY COMMITTEE ELIAS SASSOON, PE, DIRECTOR OF PUBLIC WORKS SUBJECT: AGENDA ITEM NO. 7-A DRAFT PORTUGUESE BEND LANDSLIDE FEASIBILITY STUDY RECOMMENDATION Receive and provide official input as a Committee to the City Council. DISCUSSION This item is continued from the February 8, 2018 meeting to allow members additional time for discussion. At the January 16, 2018 City Council meeting, the Draft Portuguese Bend Landslide Feasibility Study was presented to the City Council. Based on the level of community interest and the number of public comments received, the City Council directed Staff to compile the public comments and provide responses for the City Council s consideration at a future special meeting. At this meeting, members have an opportunity to comment on the draft of the initial input from Subcommittee members Vanderlip and Wedemeyer and Chair Spain. Then after discussion finalize the draft for an official input from IMAC to the City Council. Attachment: Draft Initial Input from Members Wedemeyer, Vanderlip and Spain Agenda Item No. 7-A Page 1 of 1

4 Initial IMAC Assessment of the Scope of the Draft Feasibility Study The Infrastructure Management Advisory Committee (IMAC) recommends that the City expand the scope of the feasibility study to include planning for the scenario that land movement in the Portuguese Bend Landslide Complex might continue for decades, regardless of what additional mitigation measures might be implemented because of the pending Feasibility Study. The Portuguese Bend Landslide was re-activated some 60 years ago. Since then, many bright, well qualified experts have recommended various mitigation measures. All such measures, when implemented, failed to halt the Portuguese Bend Landslide. Measures that had significant success in the Abalone Cove Landslide failed in Portuguese Bend because the detailed mechanics of the landslide are not adequately understood. The scope of the current Feasibility Study is focused upon measures to slow, if not halt, the landslide. The Feasibility Study does not discuss living with the land flow while it continues to move, despite best efforts to slow or halt it. Some specific issues merit immediate study and advance planning. One issue is early warning (if possible) and prompt repair or restoration if there is a sudden, major failure of Palos Verdes Drive South and the twin sewage lines. Another is long-term planning to mitigate the chronic, progressive damage which is routinely repaired under current City and County practice. The feasibility of re-routing Palos Verdes Drive South and the twin sewage lines should be evaluated, as a contingency plan. The feasibility study recommends obtaining additional current geological data but does not propose any long-term data collection effort. The IMAC recommends developing and funding a plan to gather and retain, over an extended period, dynamic data for the whole landslide. Such data should include changes in surface topography, 3-D land movement, water flows, water levels and water pressures. The data should be collected with an objective of supporting development of advance warnings, or early recognition, of significant changes in landslide movement. There is general agreement that upstream and local surface water runoff needs to be collected and carried to the sea. The details of this work are not developed in detail by the study. The IMAC observes that upstream work might be commenced before any long-term testing is carried out on practical, survivable solutions to deliver storm water under Palos Verdes Drive South to the ocean. If this downstream problem of delivering water past the road is not actually solved first, then any upstream storm drain work will deliver more water, faster, into the depressions north of Palos Verdes Drive South and could do more damage than good. The IMAC recommends that upstream storm drain work such as canyon linings, which may have large environmental impact in the Nature Reserve, be deferred until downstream storm drains have been installed and proven to survive landslide stresses. Otherwise, major impacts may be incurred but the justifying benefits may fail to materialize. Once survivable downstream drainage is in place comprehensive environmental mitigation could be designed around the most robust feasible drainage solutions. Finally, the IMAC recommends additional study of the portion of the slide that terminates at western Sacred Cove to see whether hydraugers, or other drainage devices, in this location might help slow the subsidence of Palos Verdes Drive South in this area. Edits by KCV, LRW & JKS IMAC Item 7.a Attach A

5 MEMORANDUM RANCHO PALOS VERDES DATE: FEBRUARY 28, 2018 TO: FROM: CHAIR SPAIN AND MEMBERS OF THE INFRASTRUCTURE MANAGEMENT ADVISORY COMMITTEE ELIAS SASSOON, PE, DIRECTOR OF PUBLIC WORKS SUBJECT: AGENDA ITEM NO. 8-A PRESENTATION AND DISCUSSION OF PRIORITIZATION METHOD USED BY PW STAFF FOR FY CAPITAL PROJECTS FUNDED BY CIP RESERVES RECOMMENDATION Receive and provide input. DISCUSSION This item was added at the request of Chair Spain. Public Works Director Sassoon, and Finance Deputy Director Nguyen will present the criteria used to prioritize CIP projects, funded by CIP reserves, for the upcoming FY Agenda Item No. 8-A Page 1 of 1

6 MEMORANDUM RANCHO PALOS VERDES DATE: FEBRUARY 28, 2018 TO: CHAIR SPAIN AND MEMBERS OF THE INFRASTRUCTURE MANAGEMENT ADVISORY COMMITTEE FROM: ELIAS SASSOON, PE, DIRECTOR OF PUBLIC WORKS SUBJECT: AGENDA ITEM NO. 8-B PROCESS TO GATHER IMAC MEMBER PROJECT PRIORITIZATION INPUTS RECOMMENDATION Receive and provide feedback. DISCUSSION This item was added at the request of Chair Spain. Staff and Chair Spain will demonstrate the process of gathering member inputs after members rank projects and place them in their preferred priority order. Agenda Item No. 8-B Page 1 of 1