§ 33.211. Requirement and specifications.

 (a)  The owner, contractor or superintendent of each cavern shall make, or cause to be made, an accurate map or plan of the workings or excavations of the cavern on a scale of not less than 100 feet to the inch.

 (b)  This map or plan shall exhibit the workings or excavations in the material being worked and the tunnels and passages connecting with these workings or excavations. It shall state in degrees or in percentage of grade or elevation the general inclination of the strata in the workings or excavations along with any material deflection in such strata. It shall also state the approximate tidal elevations of the bottom of each shaft, slope, tunnel, and entry, and of any other point in the cavern or on the surface where such elevation shall be deemed necessary by the Department or its authorized representative. The map or plan shall show the number of the last survey station and the date of each survey on the entries or the most advanced workings. It shall also accurately show the boundary lines of the lands of the cavern and the proximity of the workings to it.

 (c)  A true copy of each map or plan so prepared shall be deposited with the Department. If so desired by the Department, the workings of each level shall be shown on separate sheets. One copy of the complete map or plan shall be kept at the cavern. Each map or plan shall be plainly marked for ready identification with the name, number or other designation of the cavern, the location of the cavern, the name of the owner and the name of the contractor. Each map or plan shall also indicate the principal product to be stored. Maps and plans of caverns which are deposited with the Department shall be the property of the Commonwealth. In no case shall any copy or inspection of any map or plan so deposited be made without the consent of the owner, except for use within the Department.