In determining whether an obstruction is a hazard to navigation for the purposes of marking, the District Commander considers, but is not limited to, the following factors:

1. (a) Location of the obstruction in relation to the navigable channel and other navigational traffic patterns;
2. (b) Navigational difficulty in the vicinity of the obstruction;
3. (c) Depth of water over the obstruction, fluctuation of the water level, and other hydrologic characteristics in the area;
4. (d) Draft, type, and density of vessel traffic or other marine activity in the vicinity of the obstruction;
5. (e) Physical characteristics of the obstruction;
6. (f) Possible movement of the obstruction;
7. (g) Location of the obstruction in relation to other obstructions or aids to navigation;
8. (h) Prevailing and historical weather conditions;
9. (i) Length of time that the obstruction has been in existence;
10. (j) History of vessel incidents involving the obstruction; and
11. (k) Whether the obstruction is defined as a hazard to navigation under other statutes or regulations.

[CGD 91-031, 57 FR 43403, Sept. 21, 1992]