Dams Sector Consequence-Based Top Screen Methodology

List of Figures
Figure 1: Consequence-Based Top Screen process.................................................................... 2
Figure 2: Types of Storage and Reservoir Levels. ..................................................................... 7
Figure 3: Portfolio Prioritization............................................................................................... 17
Figure A.1: Recorded pool elevations as a function of time over the period of record........ 20
Figure A.2: Pool elevations as a function of the percent time equaled or exceeded. ............ 20
Figure C.1: Parameter Damage Index Function...................................................................... 38
Figure C.2: Determination of relative weights......................................................................... 39
List of Tables
Table 1: Total population at risk (number of people) ............................................................ 11
Table 2: Close-range population at risk (number of people).................................................. 11
Table 3: Direct Economic Impacts (millions of dollars)......................................................... 12
Table 4: Total population served for water supply (number of people)............................... 14
Table 5a: Annual water deliveries (millions of dollars) ......................................................... 14
Table 5b: Annual water deliveries (acre-feet)......................................................................... 14
Table 6: Installed generating capacity (MW).......................................................................... 14
Table 7: Annual flood damages prevented (millions of dollars)............................................ 14
Table 8: Annual navigation tonnage (kilotons/year) .............................................................. 14
Table 9: Annual recreational visitors (number of people)..................................................... 15
Table 10: Loss of life (number of people) ................................................................................ 15
Table 11: Total economic impacts (millions of dollars).......................................................... 15
Table A.1: Determination of 1% Exceedance Duration Pool elevation................................. 19
Table C.1: Consequence severity levels ................................................................................... 37
Table of Contents
ii