Dams Sector Consequence-Based Top Screen Methodology

• If available, provide the estimated value of M 4 .
• Provide the name(s) of the population center(s) and/or local area(s) protected by the facility:
- Population Center: ____ State: ____
• Indicate how the value selected above for average annual damages prevented was obtained.
Please identify relevant data sources and reference materials (if applicable, include title,
author, date, and/or version of any report, study and/or data source used as reference).
Navigation: Provide an approximated estimate for the annual navigation tonnage through the
facility by selecting the appropriate range from the table below.
Annual Navigation Tonnage, M 5
Level
M 5 (kTons/Year)
1 M 5 > 100,000
2 50,000 < M 5 ≤ 100,000
3 25,000 < M 5 ≤ 50,000
4 12,500 < M 5 ≤ 25,000
5 6,250 < M 5 ≤ 12,500
6 3,125 < M 5 ≤ 6,250
7 0 < M 5 ≤ 3,125
8 M 5 = 0
• If available, provide the estimated value of M 5 .
• Indicate how the value selected above for annual navigation tonnage was obtained. Please
identify relevant data sources and reference materials (if applicable, include title, author,
date, and/or version of any report, study and/or data source used as reference).
Recreation: Provide an approximated estimate for the number of recreational visits to the
project area by selecting the appropriate range from the table below.
Annual Recreation Visits, M 6
Level
M 6 (Visitors/Year)
1 M 6 > 4,000,000
2 2,000,000 < M 6 ≤ 4,000,000
3 1,000,000 < M 6 ≤ 2,000,000
4 500,000 < M 6 ≤ 1,000,000
5 250,000 < M 6 ≤ 500,000
6 125,000 < M 6 ≤ 250,000
7 0 < M 6 ≤ 125,000
8 M 6 = 0
Appendix B: Consequence-Based Top Screen Worksheets 34