[Code of Federal Regulations] [Title 33, Volume 1] [Revised as of July 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 33CFR64.31] [Page 154-155] TITLE 33--NAVIGATION AND NAVIGABLE WATERS CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY PART 64_MARKING OF STRUCTURES, SUNKEN VESSELS AND OTHER OBSTRUCTIONS --Table of Contents Subpart D_Miscellaneous Provisions Sec. 64.31 Determination of hazard to navigation. Source: CGD 78-156, 48 FR 11267, Mar. 17, 1983, unless otherwise noted. Redesignated by CGD 91-031, 57 FR 43402, Sept. 21, 1992. 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: (a) Location of the obstruction in relation to the navigable channel and other navigational traffic patterns; (b) Navigational difficulty in the vicinity of the obstruction; (c) Depth of water over the obstruction, fluctuation of the water level, and other hydrologic characteristics in the area; (d) Draft, type, and density of vessel traffic or other marine activity in the vicinity of the obstruction; (e) Physical characteristics of the obstruction; (f) Possible movement of the obstruction; (g) Location of the obstruction in relation to other obstructions or aids to navigation; [[Page 155]] (h) Prevailing and historical weather conditions; (i) Length of time that the obstruction has been in existence; (j) History of vessel incidents involving the obstruction; and (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]