Section SPS 308.21 - Abandoned shafts and wells(1) PROTECTION. All abandoned mine shafts, exploration shafts and test wells in this state shall comply with s. 167.27(5) and (6), Stats.(2)MAPPING OF UNDERGROUND WORKINGS. (a) All underground workings shall be surveyed and mapped within a reasonable time as work develops. All underground workings shall be surveyed and mapped before they are allowed to become inaccessible. All surveys shall be tied to an exterior quarter section corner.(b) Before any mine having underground workings is abandoned, the operator of the mine shall have an engineer or surveyor make a map, on a scale not smaller than 100 feet to the inch, showing all underground workings. A print or copy of such a map certified by the operator or designee as being accurate shall be filed with the department.Wis. Admin. Code Department of Safety and Professional Services SPS 308.21
Cr. Register, May, 2001, No. 545, eff. 6-1-01.