Regulation 271(1) The plans and specifications required to be submitted to the Chief Inspector under regulation 270 shall contain(a) in the case of a proposed dam,(i) a contour plan of the locality and a cross-section and a site plan of the dam together with particulars of the strata in or on which each embankment is to be constructed; (ii) a longitudinal section showing the slope of the bed of the river;(iii) plans of the vertical end and mid-section of the embankments showing the position, size and details of all spillways;(iv) details and nature of the materials proposed to be used in the construction, and particulars of the method of placing the materials in the formation of the embankments;(v) the safety factor allowed in the strength of the embankments;(vi) the estimated capacity of the dam;(vii) the estimated area of the catchment or maximum known flood capacity of the river or stream on which the dam is to be constructed;(viii) the average and maximum known rainfall;(ix) the estimated discharge capacity of spillways;(x) the results of geotechnical investigations of the location of the dam;(xi) particulars of the course of overflow waters indicating whether it is through or adjacent to any populated area or locality; and(xii) details of the measures to be adopted in order to ensure safety in the event of an unprecedented rainfall, the bursting of the dam or the flooding of areas exterior to any natural channel or water-course by an uncontrolled escape of water and tailings from the dam;(b) in the case of the dam already constructed but intended to be enlarged or altered(i) plans, sections, details and particulars of the existing dam and the embankments and other details and the information that is required by paragraph (a) in connection with the construction of a dam;(ii) particulars of any alteration in the capacity of the dam; and (iii) an assessment of risks arising from the enlargement of the dam.(2) The plans and sections shall be drawn to scale and all essential measurements shall be plotted on them.