(A) Planning. Planning for the major drainage system is to insure that storm water run-off which exceeds the capacity of the minor drainage system has a route to follow that will not cause substantial damage. This system exists whether or not it is planned.
(B) Criteria.
(1) Storm frequencies. Surface run-off for the major drainage system shall be determined using a storm with a frequency of 100 years.
(2) Building restriction. No building opening will be located at an elevation lower than two feet above the water surface elevation at the 100-year storm unless approved by the village.
(C) Points of consideration. All open channels, street cross sections, low points, culverts, entrances, and the like will be considered as possible flood areas due to the 100-year storm and will be included as part of the major drainage system investigation.
(D) Submittals. All calculations will be submitted with the drainage plan. The boundaries, contours, and extremes of the major drainage system will be delineated on the drainage plan. The designer will point out the problem and proposed solutions to avoid damage due to the 100-year storm.
(Ord. C-604, passed 9-8-86)