APRIL 2, 2007SHAWNEE PLANNING COMMISSION MINUTESPAGE 32
8.Erosion and sediment control measures are required for all land disturbing activities. The applicant is responsible for installing all such measures shown on the approved plans prior to commencing any grading activities. The applicant is also responsible for maintaining such measures throughout construction until vegetation is established over the disturbed areas. Staff may require additional measures as may be necessary in the field to repair eroded areas and retain sediment on the development site. The applicant is responsible for installing such additional measures or repairing existing measures within 72 hours of receiving notification. All disturbed areas must be covered with sod, or seed and mulch, immediately following the completion of final site grading. All temporary measures must be removed once vegetation is established over the disturbed areas.
9.The applicant is responsible for obtaining such permits as may be required by the Army Corps of Engineers (COE) for grading activities covered by Section 401 (Water Quality Certification), Section 402 (Wetlands), and Section 404 (Waters of the United States) of the Clean Water Act.
10.The applicant is responsible for obtaining such permits as may be required by the Kansas Department of Health and Environment (KDHE) for grading activities covered by the Environmental Protection Agency’s National Pollutant Discharge Elimination System Permit Program. A copy of the application for any required permit must be submitted to the City prior to the issuance of any grading permit.
11.The storm drainage improvements required for this development shall be designed in accordance with Division 4600, Storm Drainage, of the Shawnee Manual of Technical Specifications and Design Criteria. The enclosed and open components of the drainage system must be designed to convey the stormwater runoff from a 4 percent (25-year return period) design storm. The overflow components designed to convey the runoff from a 1 percent (100-year return period) design storm.
The applicant has submitted a preliminary storm drainage study with the site plan showing a conceptual drainage system, a drainage area map, and a drainage table summarizing the hydrologic and hydraulic analysis for the development site and all upstream tributaries. The preliminary study is substantially complete and adequate for the purposes of reviewing the site plan although the following design issues and any additional issues discovered during the review of the site development plans must be resolved prior to the issuance of any permit.
A drainage analysis must be prepared for the culvert under the proposed driveway approach.