Preliminary maps were received for one of the four scenarios, failure of the Auxiliary Dam with a restricted reservoir pool. The maps will be further refined to improve the level of detail to assist local emergency response planners with evacuation planning.

These preliminary inundation maps were presented to the Kern County Board of Supervisors on October 30, 2007 along with a project status update.

Investigations Update-A draft of the Environmental Assessment for the reservoir restriction that was scheduled for public release on September 15, 2007 continues to be delayed. USFWS provided concurrence on the Categorical Exclusion for the drilling efforts. This document has been signed and approved and is now considered final. Aerial photography was flown, currently awaiting award of contract mod to use this data to create maps. Funding was received for this effort under the current Continuing Resolution. As part of the Auxiliary Dam site characterization efforts, the task order will be modified to add a deep exploration trench upstream of the dam that will allow for foundation exploration and characterization.

This beneficial effort is possible due to the unusually low reservoir level (at 19% capacity). Interim Risk Reduction Measures Report reports undergoing independent technical review at the LA District. Locations for fault trenches currently being assessed for the ongoing geologic investigation of the Kern Canyon Fault Contracting actions continue for the installation of the alert sirens in the Town of Lake Isabella.

USACE Kansas City District drilling continues at the Auxiliary Dam as part of the site characterization efforts. USGS is scheduled to begin geophysical investigations of the Auxiliary Dam foundation on November 5, 2007. The Isabella-specific IDIQ was awarded to the Joint Venture comprised of URS Corp., Kleinfelder Inc., and Geomatrix Consultants.

A site visit and task planning meeting will be scheduled at the Dam in the near future for the technical leads of the Joint Venture.Current Work includes breach study modeling and inundation mapping, Auxiliary Dam conduit hydraulic study review.

Processing and analysis of USGS geophysical data at Auxiliary Dam Environmental assessments.

Main Dam site characterization Phase A.

Aerial surveys drilling and instrument installations occurring at Auxiliary Dam, Kern Canyon fault investigations, and siren installation funding.

The project has received an additional $245,000, for a total of $896,500 under the first continuing resolution for the period ending October 31, 2007; moneys will be used to fund fault trenching studies, site strategy meetings and the siren installation as well as labor for the period. Coordination.

The Corps continues to communicate and coordinate with various entities, including the local water user agencies, Kern County, and the City of Bakersfield.

This report is being sent directly to 11 federal contacts, 3 state contacts, 17 local contacts, and 23 representatives from various water agencies and districts.

The Kern River interests is having their representative attend meetings on Isabella at the Corps office every two weeks. Kern County Engineering & Survey Services Department and City of Bakersfield officials are also receiving regular bi-weekly briefings, via telephone conference.

The US Forest Service will also participate in these conferences. The detailed seepage study in the vicinity of the auxiliary dam conduit scheduled completion date has been extended to December 2007.

The Main dam site characterization (Phase A) is underway, with completion of studies awaiting geophysical data, report expected beginning of November 2007. Inundation Mapping of the four risk scenarios are due in January 2008.

The recommendations offered included keep water stored in the dam below a level set by the Corps of Engineers. Do a complete analysis of whether that level is low enough to minimize risks. Do a test filling of the dam to see if monitors note changes in seepage. Install devices to monitor movement of a nearby earthquake fault. -Test the earth under the shell of the main dam to see if it is a risk to the 'seismic stability' of the main dam. Update the 'Emergency Action Plan' for a dam failure and conduct emergency exercises in coordination with local officials. -Complete the investigation of the Isabella Dam and studies and come up with alternatives for repairing or replacing it.