Subsection 214-3-3.53 - SPILLWAY DESIGNa. Every impounding structure shall have a spillway system with adequate capacity to discharge water in keeping with potential hazards involved without endangering the safety of the impounding structure.b. A spillway shall be required, unless it is demonstrated by the applicant that adequate capacity is provided by other means to prevent endangering the integrity of the impounding structure.c. A vegetated earth or unlined emergency spillway may be approved when demonstrated that it will pass the spillway design flood without jeopardizing the safety of the structure. C.M.R. 15, 214, ch. 3, § 214-3-3.5, subsec. 214-3-3.53