694-DR HAZARD MITIGATION PLAN

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HAZARD MITIGATION PLAN
BORAH PEAK EARTHQUAKE
OCTOBER 28, 1983

FEMA-694-DR

 

EXECUTIVE SUMMARY of
Proposed Mitigation Measures

 Proposed mitigation measures and actions already taken and proposed are:

  1. Conduct an initial coordinating hazard mitigation planning meeting. The meeting was held January 31 through February 2, 1984.
  1. Conduct a hazard vulnerability analysis of Custer County. The draft is expected to be completed by October 1, 1984. The analysis is to be published by December 1984.
  1. Identify and catalog existing hazard maps and reports and identify those required for the reduction efforts. This effort is now in progress with expected completion date of July 1986.
  1. Continue and, in some cases, initiate earthquake, geological research in Custer County and the State of Idaho. This requires ongoing action, with review to be performed in FY 87.
  1. Translate all scientific terms into layman's terms. This will be ongoing and dependent upon the development of needed elements.
  1. Develop a multi-hazard risk map of Custer County. This will be ongoing and dependent upon completion of other studies. A review of status is to be performed by December 1987.
  2. Study Mackay Dam. Completion is expected by June of 1985.
  1. Research reaction of earthfill dams to earthquakes. Completion is expected by June of 1985.
  1. Determine the feasibility of developing an earthquake seismic task force within the State of Idaho. This is to be completed by September, 1986.
  1. Develop an earthquake scenario for Custer County. The time line will depend on the availability of needed information.
  1. Review seismic zones in relation to civil structures. This is an ongoing project.
  1. Remove unsafe structures that were irreparably damaged by the earthquake. This action has been completed.
  1. Provide public information and education. This will be done during FY 85.
  1. Recommend to the cities of Mackay and Challis the adoption of preventa­tive safety measures. This action was completed on July 10, 1984.
  1. Conduct an investigation on the feasibility of presenting a new compre­hensive plan which may be acceptable to the citizens of Custer County. The completion of this is predicated upon the feasibility and results of such an investigation.
  1. Low or no-cost measures should be recommended and information made available to the people of Custer County. This requires ongoing action but most material will be distributed during FY 85.
  1. Investigate the establishment of seismic safety standards for school construction and school occupancy in the State of Idaho in October, 1987.
  1. Reduce the problem with the Mackay Dam spillway.  Barring unforeseen problems, completion is expected by November 18, 1984.
  1. Reduce the problem with the Challis Irrigation Company Tunnel. Most repair work was accomplished by May, 1984.
  1. Conduct an earthquake workshop for the structural engineers from Idaho. This action was completed on June 15 and 16, 1984.
  1. Investigate the feasibility of intrastate agreement with structural engineers. The expected completion date is December of 1986.
  1. Revise Custer County's Emergency Operations Plan. The revision should be completed by September 30, 1985.
  1. Conduct a hazard vulnerability meeting for the public. The County Commissioner Meeting should be held when the necessary research has been completed but is expected to be accomplished during FY 85.
  2. Conduct earthquake educational sessions in the schools. This requires ongoing action.
  1. Conduct an investigation on the feasibility of pursuing an interstate mutual aid agreement. This is to be completed by September of 1985.

All of the outlined measures are predicated upon the development of the plan and studies are dependent upon the identified lead agencies. A yearly review by Idaho Bureau of Disaster Services will take place and the measures will be revised accordingly.

It should be noted that the measures listed above are not directive in nature. Local government (and, in some cases, State government) must necessarily decide which actions are feasible and which ones are not. In any case, safety and protection of people and property must be paramount in the decision making process.

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