Submittals for review shall include, but not be limited to:
(a) A soils map drawn to a scale of one inch equals 200 feet. In addition:
(1) Contours shall be at a minimum of two-foot intervals.
(2) All soil types shall be noted along with all ground cover, woodlands and other ground conditions.
(3) The total drainage area tributary to the proposed project, including the project, shall be noted. (Before and after development conditions must be noted.)
(4) A legend must be provided noting the soils, area in acres and soil groups (before and after development).
(5) A copy of the U.S. Department of Agriculture SCS Soil Survey of Cuyahoga County, Ohio, 1980, or latest edition, showing the entire drainage area and subarea, shall be provided.
(6) All existing drainage facilities must be noted (i.e. storm sewer culverts, lake and swamps, etc.).
(b) A drainage area map (before and after development). Specifically:
(1) An aerial photograph with a scale of one inch equals 100 feet must be supplied with the entire drainage area, and all subareas shall be noted along with all existing land use conditions.
Contours shall be at a minimum of two-foot intervals. Any other submittal shall meet with the prior approval of the City Engineer.
(2) All existing drainage facilities must be noted along with all necessary field data.
(3) All natural waterways must be noted, and cross sections of all waterways must be submitted along with any other data to sufficiently determine the exact time of concentration or travel time.
(4) All existing and proposed modifications to the drainage system must be noted.
(5) A complete storm sewer design noting all proposed storm sewers, culverts and other storm water management facilities must be submitted.
(6) Emergency flow ways must be shown on this plan.
(c) Soil Conservation Service, Technical Release No. 55, June, 1986, or latest edition, Urban Hydrology for Small Watersheds (before and after development). The following procedures must be utilized in the design of any storm water facility:
(1) A Type II rainfall distribution and City rainfall data;
(2) Runoff curve summary showing pre- and post-development conditions;
(3) Runoff calculations;
(4) Travel time and time of concentration calculations;
(5) Calculations on peak discharge and discharge volume;
(6) Pre and post hydrographs;
(7) Storage volume requirements.
All storms must then be routed through the the proposed drainage facility using the storage- indication method of routing.
SCS emergency spillway design calculations must be submitted for a 100-year storm.
Any additional information required by the City Engineer must be submitted at this time.
The TR 55 computer programs may be utilized in this process.
(Ord. 05-79. Passed 6-7-05.)