Section R. 460.20414 - CoverRule 414. In addition to the requirements set forth in 49 C.F.R.§192.327, which is adopted by reference in R 460.20606, an operator of pipeline facilities used in the transportation of sour gas shall comply with all of the following provisions:
(a) Pipelines shall be buried, except where special conditions of usage necessitate above ground construction.(b) A buried pipeline shall be installed with a minimum cover of 48 inches.(c) When practical, a warning tape shall be installed not less than 12 inches directly above the pipeline, but not more than 36 inches below grade, for the purpose of warning excavators of the existence of the pipeline and the hazardous nature of sour gas.Mich. Admin. Code R. 460.20414