020-26 Wyo. Code R. § 26-7
(a) Openings. Openings into the top of the well that are designed to provide access to the well, (e.g.), for measuring, chlorinating, adding gravel, etc., shall be protected against entrance of surface waters or foreign matter by installation of water tight caps or plugs. Access openings designed to permit the entrance or egress of air or gas shall terminate above the ground and above known flood levels and shall be protected against the entrance of foreign materials by installation of down turned and screened "U" bends. All other openings (holes, crevices, cracks, etc.) shall be sealed.
A sounding tube, tap hole with plug, or similar access for the introduction of water level measuring devices may be affixed to the casing of the well as long as the proper seal is maintained. Access ports for water level or pressure measuring devices are required by the State Engineer on all wells greater than four inches diameter.
020-26 Wyo. Code R. § 26-7
Amended, Eff. 6/29/2018.