045-6 Wyo. Code R. § 6-11
(a) The Department does not require casing of pipelines crossing the highway R/W as long as heavy wall thickness carrier pipe is used and the pipeline is cathodically protected. (Also see Section on Pipelines).
(b) For crossings of small diameter power, communications, or similar lines that can not be pushed or bored underneath the roadway embankment, a metallic or nonmetallic casing pipe of a wall thickness that can withstand highway loading may be used.
(c) Casing pipe or heavy wall thickness pipe shall extend at a minimum to the face of the bore/ receiving pit to allow for future dirt widening of the road embankment and shall be of a wall thickness meeting the criteria for highway loading.
(d) For casing of water, sanitary sewer, and storm water pipelines see the stipulations in Chapters VI and VII of this regulation.
045-6 Wyo. Code R. § 6-11