Plans, profiles, and supporting documentation to verify conformance with these criteria shall be submitted along with the usual plan submissions required in Chapter 155, Subdivision Rules and Regulations, and shall be referred to as the Storm Water Management Control Plan. This plan shall include:
(A) Preliminary plans. In addition to the requirements of Chapter 155, Subdivision Rules and Regulations, a plan showing the total area contributing run-off to the subdivision or land development being considered (project area) shall be submitted with the preliminary plan. This plan shall contain, but is not limited to, the following information:
(1) A contour plan showing the outline of all areas outside the project area that contributes run-off to it.
(2) Estimated run-off (Q) before and after development for terminal points along natural streams, proposed open channels, and other strategic points such as existing storm sewers or culverts.
(3) Location of proposed detention/ retention areas.
(4) Any other information required by the village to clarify intent.
(B) Improvement plans. In addition to the requirements of Chapter 155, Subdivision Rules and Regulations, the improvement plan for the project area shall contain, but is not limited to, the following information:
(1) Diameter, length, slope, concrete pipe, and class (if other than Class II), of all storm sewers, culverts, and sub-surface drainage.
(2) Invert elevations on profiles of all pipes at terminal points such as manholes, inlets, catch basins, and headwalls.
(3) Top of grate elevations of manholes and grate flow lines of catch basins and inlets located outside the public right-of-way. This information shall be submitted for structures within the right-of-way when required by the Village Engineer.
(4) Type of catch basin, inlet, and manhole.
(5) Headwall type.
(6) Cross-sections of proposed open channels showing width of bottom, depth of water, erosion control measures and limits, and side slopes at each point of design along with a profile indicating the longitudinal slope and bottom elevations at the terminal points and points of design.
(7) High and low points, on the plan, indicating the direction of run-off flow on the roadway.
(8) Structural details and design data for detention/ retention facilities.
(9) Details of construction for all structures not included in the standard construction drawings of the Subdivision Rules and Regulations, these criteria, or other referenced standards.
(10) Easements.
(11) Other requirements of Chapter 153, Soil Erosion and Sediment Control.
(12) Any other information required by the village to clarify intent or design features.
(C) Drainage and grading plans. In addition to the improvement plan, a drainage and grading plan shall be submitted. This plan may be superimposed on the required improvement plan, or similar plan at a scale of 1 inch equaling 100 feet or larger, showing at least the following additional information:
(1) Contours indicating the existing and final grading at vertical increments of no more than two feet.
(2) Discharge (Q), co-efficient of run-off (c), and drainage area (A) along with the outline of the drainage area for each inlet, catch basin, culvert and open channel point of design, and at other locations designated by the Village Engineer. Drainage areas that lie partially outside the limits of the drainage and grading plan may be delineated on any contour map acceptable to the Village Engineer.
(3) Discharge (Q), before and after development at strategic points within and at the extremities of the project area.
(4) Delineation of the boundaries and contour elevation along with the route of the major drainage system through downstream areas to an adequate outlet although the outlet may be outside the project area.
(5) Delineation of the horizontal limits of ponding areas for storms with frequencies of 25 years and 100 years at low points (sags) in the street profile and low points outside the street right-of-way including, but not limited to, culvert headwater, natural stream water surfaces, and sump type inlets.
(6) High and low water horizontal limits and contour elevation of detention/retention/ sedimentation facilities along with water surface and control weir elevations, outlet structures, and the like.
(7) All requirements of Chapter 153, Soil Erosion and Sediment Control.
(8) Any other information required by the village to clarify intent, specified requirements, or design features.
(D) Supporting data. All data and design information used for the design of drainage facilities and for determining downstream flood information shall be submitted with the drainage and grading plan. To facilitate review and avoid confusion, legends, descriptions, structure numbering, and the like used on design forms or other calculations shall be identical to those used on the improvement plans and the drainage and grading plan. This data shall include, but is not limited to:
(1) Weighted run-off coefficient calculations for each contributing area.
(2) Pavement drainage computations.
(3) Storm sewer computations.
(4) Culvert design computations.
(5) Open channel computations.
(6) Detention/retention facilities computations.
(7) Any other information required by the Village Engineer to clarify intent or design features.
(Ord. C-604, passed 9-8-86)