A. Preliminary plats submitted for review and approval shall be accompanied by the following documents, which shall be submitted to the City Engineer or the duly appointed City representative:
1. Five (5) copies of predevelopment report accurately describing:
a. Dimensions, size and location;
b. Existing topography;
c. Soil types;
d. Vegetation;
e. Flood hazard areas;
f. Other significant surface features;
g. Existing land use;
h. Existing runoff volume;
i. Existing runoff rates;
j. Existing runoff routing.
2. Five (5) copies of a plan for the control of erosion and sedimentation which shall contain:
a. Data showing the nature and extent of the proposed clearing, grading and development or improvement operations;
b. An estimate of soil loss during and after development;
c. Proposal for the control of erosion and sedimentation during and after development including a statement of actions proposed to assure erosion control for all areas of the site that will be unprotected for long periods or during peak rainy periods and for natural drainage ways prior to and during construction; and
d. Proposed topography of the site after development or improvement including the method of handling runoff and stormwater.
3. A written statement of the impact on upstream and downstream drainage prepared by an Oklahoma registered professional engineer and approved by the City Engineer or the duly appointed City representative. The accuracy and validity of any drainage impact statement and attachments shall be capable of withstanding serious challenge at any stage in the review and approval process in order to be accepted as a part of the project. Accordingly, the alleviation of adverse impacts by on-site and off-site improvements relating to the drainage are of important concern and shall be satisfactorily provided as required by this article.
4. A description of proposed easements and/or rights-of-way, and the provision of binding agreements between cooperating developers, for drainage improvements required outside of subdivision development boundaries. Public easements and right-of-way dedications shall be initiated by the developer, property owner planning property improvement, or legal agent thereof, shall be prepared in the manner prescribed by law, and shall be submitted in accordance with the timing and routing requirements of this or other applicable article.
B. Final plats submitted for review and approval shall be accompanied by the following documents, which shall be submitted to the City Engineer or the duly appointed City representative.
1. All documentation required by this section; and
2. Improvement plans meeting the requirements of this section.
C. Any person applying for a building permit or who otherwise intends to make changes in the contour of any land shall first submit the following documents to the City Engineer or the duly appointed City representative.
1. All documentation required by this section, allowing that, at the direction of the City Engineer, or others the documentation need not be prepared by a professional engineer; and
2. Plans for improvement or changes proposed, including site plans, plot plans, and building drawings for buildings and structures, clearly showing the method of handling rainfall runoff and stormwater.
3. The following activities are specifically exempted from the requirements of this section:
a. Bona fide agricultural or forestry operations.
b. Home gardening or other minor clearing or excavation work not incident to a change in the residential use of the land.
c. Emergency repairs necessary for the preservation of life, health, or property.
d. Routine maintenance or repair work on public or private roads an rights-of-way or utility line easements and rights-of-way.
e. Changes that would occur on single-family residential lots or property of less than two (2) acres, unless the proposed action(s) conflict with previously approved reports required by subsection (D).
D. All plans and documentation required by this section must comply with all City standards, regulations, ordinances, and with the approved drainage master plan or drainage studies.
E. All documentation and plans required by this section must be approved by the City Engineer or other authorized City representative prior to their implementation. The City Engineer or other authorized City representative may submit any documents to the following agencies for their review and comment prior to his approval:
1. The City Public Works Authority; and
2. The United States Soil Conservation Service; and
3. Any other local, federal or State agency involved in floodwater detention or retention waters.
F. Appeals of the decision or requirements made as a result of this review, other than for improvement plans requirements, may be made first to the City board of adjustment and if still dissatisfied to district court.
G. Projects and tasks proposed in the plans and documents required by this section shall be implemented as proposed. Any changes or amendments to the plans or documentation must be approved by the City Engineer or other authorized City representative in accordance with the established review procedures.
(Ord. No. 02-08, § 4, 5-6-2002)