EP 1130-2-520
29 Nov 96
APPENDIX AB
OPERATIONAL CONSIDERATIONS
The considerations which follow will be used in the determination of the buffer area between the
hydraulic line and the final boundary of the restricted area marking hazardous waters adjacent to
Civil Works structures:
1. What type of user is in and around the area (anticipated and existing)?
2. What types of accidents, near accidents, or incidents have occurred?
3. Should any type of environmental condition be considered such as air temperature, water
temperature, winds etc.?
4. What are the consequences of a small vessel or person entering this area?
5. Are the currents such that a small vessel or person is likely to be drawn into the hazardous area?
6. Is the restricted area marked far enough upstream and downstream to reduce the hazard should
a small vessel lose power?
7. Are navigation channels placed so that the traffic is directed away from the structure's
hazardous area?
8. Is the structure well marked and visible from beyond the restricted area?
9. Does the change in seasons have significant effects on intake or discharge requirements (power,
flooding, etc.)?
10. Can a buoy system be installed which will act as a continuous barrier and provide a well
defined restricted area?
11. Is such a barrier practical? (Consider seasonal changes, size of structure, costs, and
consequences of having or not having such a barrier.)
12. Can a buoy system be installed which will act as a line of sight (not continuous) and will
provide a well defined restricted area?
13. Is there a need for a barrier to keep vessels from entering the restricted area?
14. Are signs on the structure large enough, and placed in such a manner as to be read from
outside the restricted area or from a distance that will allow for evasive action?
15. Should signs and buoys be lighted?
16. Are buoys in accordance with the uniform state waterway system?
AB-1
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