(a) Each operator shall have a patrol program to observe surface conditions on and adjacent to the transmission line right-of-way for indications of leaks, construction activity, and other factors affecting safety and operation.
(b) The frequency of patrols is determined by the size of the line, the operating pressures, the class location, terrain, weather, and other relevant factors, but intervals between patrols may not be longer than prescribed in the following table: ------------------------------------------------------------------------
Maximum interval between patrols------------------------------------------------------------------------
At highway and At all other
Class location of line railroad crossings places------------------------------------------------------------------------1, 2............................ 7\1/2\ months; but 15 months; but at
at least twice least once each
each calendar calendar year.
year.3............................... 4\1/2\ months; but 7\1/2\ months; but
at least four at least twice
times each each calendar
calendar year. year.4............................... 4\1/2\ months; but 4\1/2\ months; but
at least four at least four
times each times each
calendar year. calendar year.------------------------------------------------------------------------
(c) Methods of patrolling include walking, driving, flying or other appropriate means of traversing the right-of-way. [Amdt. 192-21, 40 FR 20283, May 9, 1975, as amended by Amdt. 192-43, 47 FR 46851, Oct. 21, 1982; Amdt. 192-78, 61 FR 28786, June 6, 1996]