(A) The surveyor shall set boundary monuments so that, upon completion of the survey, each corner of the property and each referenced control station will be physically monumented.
(B) When it is impossible or impracticable to set a boundary monument on a corner, the surveyor shall set a reference monument, similar in character to the boundary monument and preferably along one of the property lines which intersect at that corner. When such a reference monument is used, it shall be clearly identified as a reference monument on the plat of the property and in any new deed description which may be written for the property.
(C) Every boundary monument and/or reference monument set by the surveyor shall, when practicable:
(1) Be composed of a durable material.
(2) Have a minimum length of thirty inches.
(3) Have a minimum cross-section area of material of 0.21 square inches.
(4) Be identified with a durable marker bearing the surveyor's Ohio registration number and/or name or company name.
(5) Be detectable with conventional instruments for finding ferrous or magnetic objects.
(D) When a case arises, due to physical obstructions such as pavements, large rocks, large roots, utility cables, etc., so that neither a boundary monument nor a reference monument can be conveniently or practicably set in accordance with paragraph (C) of this rule, then alternative monumentation, which is essentially as durable and identifiable (e.g., chiselled "X" in concrete, drill hole, etc.) shall be established for the particular situation.