Underground facilities other than electric power or communication lines may be installed by:
(A) The use of moles, whip augers, or other approved methods which compress the earth to move the opening for the pipe;
(B) Jacking or boring with vented encasement provided between the ditch lines or toes of slopes of the highway;
(C) Open trench with vented encasement between ultimate ditch lines or toes of slopes but only if prior to roadway construction; or
(D) Tunneling with vented encasement, but only if installation is not possible by other means.
(Prior Code, § 33-4-16)