As part of the permit application, the owner/developer or design professional shall submit two sets of storm water control (SWC) plans, two sets of calculations (made pursuant to the calculation formulas attached in the Appendix to Ordinance No. 992, passed 1-12-15 - a copy of the ordinance is available for public inspection in the office of the City Clerk during normal business hours), and any other supporting information to the AHJ or designee. The plans and calculations shall comply with the requirements of this chapter. The checklist, design requirements, and design that will be used during the review process of the drainage construction plans are established by this chapter. The application materials shall include the following items:
(A) An application fee in an amount established by the governing body in the AHJ’s jurisdiction. The application fee may vary based on the size and nature of the proposed development;
(B) A performance bond equal to 25% of the estimated construction costs of the proposed storm water control facilities, as estimated by the owner/developer or design professional and found to be reasonable by the AHJ;
(C) The location of the development site and water bodies that will receive storm water runoff;
(D) The existing and proposed topography of the development site, including the alignment and boundary of the natural drainage courses, with contours having a maximum interval of one foot. The project location shall be delineated on the pertinent Isabella County soil map;
(E) Baseline datum to be established, assumed datum are not allowed. Contact the AHJ for datum information;
(F) The development tributary area to each point of discharge from the development;
(G) Calculations for the final peak discharge rates;
(H) Calculations for any facility’s or structure’s size and configuration;
(I) A drawing showing all proposed storm water runoff facilities with existing and final grades;
(J) The sizes and locations of upstream and downstream culverts serving the major drainage routes flowing into and out of the development site. Any significant off-site and on-site drainage outlet restrictions other than culverts should be noted on the drainage map;
(K) An implementation plan for construction and inspection of all storm water runoff facilities necessary to the overall drainage plan, including a schedule of the estimated dates of completing construction of the storm water runoff facilities shown on the plan and an identification of the proposed inspection procedures to ensure that the storm water runoff facilities are constructed in accordance with the approved drainage plan;
(L) A plan to ensure the effective control of construction site storm water runoff and sediment track-out onto roadways;
(M) Drawings, profiles, and specifications for the construction of the storm water runoff facilities reasonably necessary to ensure that storm water runoff will be drained, stored, or otherwise controlled in accordance with this chapter;
(N) The name and place of employment of the design professional that will inspect final construction of the storm water runoff facilities;
(O) A maintenance agreement, in form and substance acceptable to the AHJ, shall be required for ensuring maintenance of any privately owned storm water runoff facilities. The maintenance agreement shall include the owner/developer’
(P) Any other information necessary for the AHJ to verify that the drainage plan complies with this chapter. All design information must be compatible for conversion to the AHJ’s Geographic Information System.
(Ord. 992, passed 1-12-15)