Rancho Palos Verdes City Council
   

October 7, 2006 RANCHO RANCHO PALOS VERDES CITY COUNCIL AGENDA - Landslide Workshop PRESENTATIONS AND DISCUSSION OF THE HISTORY, LAND USE CONTROLS, SIGNIFICANT OBSERVATIONS AND EXISTING DATA RELATED TO THE PORTUGUESE BEND LANDSLIDE COMPLEX October 7, 2006 RANCHO RANCHO PALOS VERDES CITY COUNCIL AGENDA - Landslide Workshop-PRESENTATIONS AND DISCUSSION OF THE HISTORY, LAND USE CONTROLS, SIGNIFICANT OBSERVATIONS AND EXISTING DATA RELATED TO THE PORTUGUESE BEND LANDSLIDE COMPLEX October 7, 2006 RANCHO RANCHO PALOS VERDES CITY COUNCIL AGENDA - Landslide Workshop-PRESENTATIONS AND DISCUSSION OF THE HISTORY, LAND USE CONTROLS, SIGNIFICANT OBSERVATIONS AND EXISTING DATA RELATED TO THE PORTUGUESE BEND LANDSLIDE COMPLEX



TO: HONORABLE MAYOR AND COUNCILMEMBERS

FROM: CITY MANAGER

DATE: OCTOBER 7, 2006

SUBJECT: PRESENTATIONS AND DISCUSSION OF THE HISTORY, LAND USE CONTROLS, SIGNIFICANT OBSERVATIONS AND EXISTING DATA RELATED TO THE PORTUGUESE BEND LANDSLIDE COMPLEX

A)Presentation of history of the landslide moratorium;
Attachment: Map - PDF
B) Establishment, purpose and powers of Redevelopment Agency;
C) Establishment, purpose and powers of Geologic Hazard Abatement Districts (ACLAD and Klondike Canyon GHAD);
D) Explanation of City geologic review process for proposed developments;
E) Review of Perry Ehlig memorandum describing various "zones" within the moratorium area;
F) Presentation on dewatering well locations and production data;
G) Presentation of GPS data and observations of movement throughout the landslide area;
H) Response to City Council questions by the City Panel of Geologists; discussion of factor of safety and rate of movement; and recommendations for future studies and monitoring within the landslide; and,
I) Presentations by independent geologists and comments from the public, including homeowners/property owners or their representatives.

RECOMMENDATION
Receive and file.

BACKGROUND
At their April 18, 2006 meeting, the City Council heard testimony about the recent movement of the Klondike Canyon Landslide. At that meeting, the City Council indicated that they would like to schedule a future workshop to discuss the regulation of development within the entire Moratorium Area, and the scientific distinctions that can be drawn between the various portions of the Moratorium Area.

DISCUSSION
Based on discussions with the City Council, it appears that there may be some gaps in the policy makers’ knowledge of landslide issues. Therefore, the Workshop agenda has been expanded to provide the City Council and members of the public a background in the of history of the landslide moratorium, the purpose and powers of the Redevelopment Agency; the purpose and powers of Geologic Hazard Abatement Districts, an explanation of the geologic review process for proposed developments, a review of Dr. Perry Ehlig’s memorandum describing various “zones” within the moratorium area, a presentation of GPS data and observations of movement throughout the landslide area and a presentation describing dewatering well locations and production data.

In addition, the City has assembled a panel of five geologists and geotechnical engineers to answer questions, interpret data and offer advice during the Workshop

Respectfully submitted:

Les Evans
City Manager