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18 If such an analysis is not made, the evaluation and decision are based on the information compiled under the preceding guidelines. This information, at a minimwn, will be the site or structure and flood elevations mentioned in Guideline 7 but the evaluation will be improved by also having on hand the information compiled for Guidelines 8, 9, and 10. Whether using the Plan Approach or the Case Approach, the decisions are more readily made if uses, or classes of uses, are tabulated in order of degree of protection required or inversely, the maximwn flood hazard permitted under the agency's policy. Guides to degrees of protection for differing classes and uses of land and facilities are given in the following tabulation: Uses or Facilities Degree of Pro- tection Required Buildings containing valuable Maximum documents or data or instru- ments, or ma.terials dangerous to the public if released by flooding; power installations needed in emergencies; hospitals and like institutions; etc. Residential buildings whose High occupants may not have adequate warning or means of escape during floods; public service installations needing high pro- te ction; pe rmanent memorial cemeteries: etc. Buildings with salvageable or Moderate replaceable goods or for storage of readily moved goods; low-cost service shops; etc. Open-air markets or theaters Low or facilities storing low-cost, non-dangerous materials; etc. Permissible Location 8< Lowest Water-Entry Elevation Outside the Area of Floodplain floods. Not below the elevation of the lOO-year flood, and not in a riverine floodway. Not below the eleva- tion of the 50-year flood, and not in a riverine floodway. Not below the eleva- tion of the 25-year flood, and not in a Riverine Floodway.