(A) The following standards shall be followed in all soil erosion and sediment control plans:
(1) All lots, tracts, or parcels shall be graded to provide proper drainage away from buildings and dispose of it without ponding, and all land within a development shall be graded to drain and dispose of surface water without ponding, except where approved by the Village of Indian Hill or its duly authorized representative.
(2) Provisions shall be made to effectively accommodate the increased runoff caused by changed soil and surface conditions during and after development. Where necessary, surface water shall be structurally retarded.
(3) A natural buffer zone of 20 foot from the top of each bank along all natural watercourses shall be maintained and protected in it's existing state with trees and vegetation, except where approved by the Village of Indian Hill or its duly authorized representative.
(4) All drainage provisions shall be of such design to adequately handle the surface runoff and carry it to the nearest suitable natural watercourse. Where drainage swales are used to divert surface waters away from buildings, they shall be sodded or planted as required and shall be of such slope, shape, and size as to conform with the requirements of the village.
(5) Concentration of surface water runoff shall only be permitted in swales or watercourses.
(6) During the construction phase, further technical assistance will be furnished, if necessary, by the Village of Indian Hill or its duly authorized representative. The Village of Indian Hill or its duly authorized representative, shall enforce compliance with the approved plans.
(B) The erosion and sediment control plan shall include but not restricted to the following:
(1) A vicinity sketch and boundary line survey of the site for which the permit is sought and on which the work is to be performed.
(2) Location of any buildings, structures, utilities, HSTS, sewers, water and storm drains on the site where the work is to be performed.
(3) Location of any building or structure on land of adjacent property owners within 100 feet of the site.
(4) Elevations, or contours, dimensions, location, and extent of all work proposed to be done, and the existing elevations or contours of the land in one-foot intervals for slopes zero degrees to six degrees, two-foot intervals for slopes six degrees to 18 degrees, and five-foot intervals for slopes 18 degrees or more.
(5) A certification of the quantity of excavation and fill involved.
(6) Detailed plans of all drainage provisions, retaining walls, cribbing, vegetative practices, erosion and sediment control measures, location of approved fences around sediment basins, steep excavations, or ponding areas, and other protective devices to be constructed in connection with, or as a part of the proposed work, together with a map showing the drainage area of land tributary to the site, and estimated cubic foot per second runoff of the area served by any drain, computed in accordance with the current storm water drainage manual.
(7) A timing schedule and sequence indicating the anticipated starting and completion dates of the development sequence - stripping and/or clearing, rough grading and construction, final grading and vegetative establishment, and maintenance, and the time of exposure of each area prior to the completion of effective erosion and sediment control measures.
(8) Provisions for maintenance of control facilities, including easements and estimates of the cost of maintenance.
(9) All of the storm water pollution prevention plan (SWP3) requirements prescribed in the OEPA NPDES Construction General Permit, latest version.
(C) Modifications to the plan shall be processed and approved or disapproved in the same manner as § 153.06 of these regulations, may be authorized by the Village of Indian Hill by written authorization to the permittee, and shall include:
(1) Major amendments of the erosion and sediment control plan submitted to the Village of Indian Hill.
(2) Field modifications of a minor nature.
(Ord. 12-20, passed 11-23-20)