To ensure that the drainage plan submitted fulfills the adopted standards and policies of the City, the City council, through its City engineer, will have the following authority and responsibilities:
A. 
Review of all preliminary and final drainage plans;
B. 
Approval, disapproval, or conditional approval of the drainage preliminary and final plans. The reasons for any disapproval or conditional approval shall be stated in writing to the applicant;
C. 
The City shall have the right to modify or vary the enforcement of these rules hereunder where extraordinary hardship exists, provided that substantial justice is done and the public interest is secured. In granting any such variance or modification, the City may require conditions at will in its judgment to secure substantial compliance with the general principles thereof;
D. 
Appeals may be had by any persons, firm, or corporation from a decision of the City or the City engineer within fifteen days after its decision.
A. 
Submittal and approval. A preliminary drainage plan shall be required and submitted to the City engineer in conjunction with all preliminary plats and shall be mandatory for all changes in land use from that existing as of the date of this Part 7, which is November 4, 1982. This drainage plan shall be reviewed and approved by the City engineer before a final drainage plan and final plat will be accepted by the City for consideration. The City shall approve conditionally or disapprove the drainage plan in writing within thirty calendar days of the submittal. If the preliminary drainage plan is disapproved, resubmittal of the entire drainage plan will be required before reconsideration of the plan will be undertaken by the City engineer.
A drainage plan shall not be required for single-family or duplex unit building permits, but shall be required for all other building permits (multi-family [more than two], commercial, industrial, public facilities, etc.), and for all land development or subdivision of lands. In addition, these special building permit drainage plans will conform with section 7-100B, items (3), (4) and (5).
B. 
Contents. The preliminary drainage plan shall contain design calculations and other supporting data showing how the development proposes to meet the general storm water drainage standards stated in this Part 7. This preliminary drainage plan and calculations must be prepared and signed by a professional engineer registered in the state. It shall, in general, also contain the following:
(1) 
A preliminary engineering plan which shall identify how the runoff from major rain storms will be conveyed by the site's swales, storm sewers, natural drainage ways, and streets during and after construction.
(2) 
A preliminary drawing that shows the development's position in the drainage basin and how it would be developed so as not to adversely affect upstream and downstream storm water flows.
(3) 
Preliminary hydrologic and hydraulic calculations and a general layout drawing showing the proposed location and approximate sizes and grades of storm sewer lines, catch basins, pumps, detention basins, and other storm water drainage structures.
(4) 
Where storm drainage facilities are to be discharged into a canal or ditch, the following two items shall be submitted, along with the preliminary drainage plan.
(a) 
A copy of a letter of approval or other written permission from the drainage district, irrigation district, canal company, or whatever agency holds legal responsibility for the canal or ditch. This letter shall also contain documentation of peak canal or ditch capacity and freeboard requirements, as well as the present and future required irrigation district or canal company required capacity.
(b) 
A layout showing the proposed location and approximate sizes and grades of any detention or treatment facilities required by the said agency responsible for the canal or ditch.
(c) 
Access easement and method for cleaning canal or ditch.
(5) 
Where lands to be developed lie within the one-hundred-year floodplain, the one-hundred-year floodplain elevations and the proposed finish floor elevations of each building shall also be submitted.
A. 
Submittal and approval. A final drainage plan shall be submitted and approved in conjunction with all land development. Each final drainage plan shall be approved and signed or disapproved by the City engineer. The reasons for disapproval or conditional approval shall be stated in writing within thirty days of receipt by the City engineer. If a final drainage plan is disapproved by the City engineer, a complete new resubmittal will be required before the City engineer will consider the drainage plan for approval. The approval of the final plat will not be given until the final drainage plan has been reviewed and approved by the City engineer.
B. 
Contents. The final drainage plan shall contain final design calculations and other supporting data showing how the development proposes to meet the surface drainage standards stated in this Part 7. The final drainage plan and calculations must be signed by a professional, registered engineer in the state. In detail, the following items shall be submitted as part of the final design plan:
(1) 
Final design calculations in accordance with this Part 7 criteria shall show the storm drainage flows anticipated in each street, closed conduit, and/or open channels of the proposed drainage facilities. A standard form provided by the City shall be used in preparing these storm drain calculations.
(2) 
Detailed plans and specifications which will be needed for grading the site and constructing streets, storm sewers, detention basins, ponds, and other storm sewer control facilities. These construction drawings shall be prepared in accordance with the City standards on twenty-four-inch by thirty-six-inch mylar sheets.
(3) 
Where the proposed drainage facilities are not located in dedicated street easements, there shall be provided an easement or drainage right-of-way conforming with the proposed watercourse and of such width to contain all construction activities, all future facilities, and of adequate width to also provide for future maintenance of the proposed facilities, or as determined by the City engineer.
(4) 
Approval from the Corps of Engineers, Federal Emergency Management Agency (FEMA), and other governing agencies for modification to major waterways.
(5) 
Where lands to be developed or where buildings are to be constructed within the one-hundred-year floodplain, the one-hundred-year flood elevations and the finish floor proposed elevation of each building shall be submitted.
A. 
Submittal and approval. Final record drawings on twenty-four-inch by thirty-six-inch mylar sheets shall be submitted, approved, and signed, or disapproved by the City engineer for all storm sewer improvements to be constructed within a City public street or right-of-way. The reason for disapproval or conditional approval shall be stated in writing within fifteen days of receipt by the City engineer. Final acceptance of the improvements to be maintained by the City will not be given until the required record drawings have been submitted and approved by the City engineer.
B. 
Contents. The record drawings shall contain all as-constructed items pertaining to storm drainage facilities. These record drawings shall be prepared in accordance with the City drawing standards and shall be inked on mylar so as to provide a permanent, reproducible copy of all existing storm water facilities.
The record drawing submittals shall also include documentation of the closed conduit and open channel storm sewer facilities by listing pipe diameter, open channel size and dimensions, flow line elevations, and contributing areas. A standard sheet to be used for summarizing this submittal shall also be used.