A. Specific Standards: No permits shall be issued unless it is determined that the proposed action within a W district complies with the following requirements:
1. Dredging and/or filling shall be located in areas of minimal vegetation.
2. Dredging activities shall not significantly reduce the water flow characteristics or ponding capacity.
3. The size of the dredged material shall be limited to the absolute minimum and said limits designated on the dredging/grading plan.
4. Disposal of the dredged material shall not result in a significant change in the current water flows, ponding, or in destruction of vegetation, fish spawning areas, or in pollution of water.
5. Earthwork will not be performed during the breeding season of waterfowl or the fish spawning season.
6. Only one boat channel or marina shall be allowed per large scale development or PUD. In other residential developments, dredging shall be located so as to provide for the use of boat channels and marina by two (2) or more adjacent property owners. The width of a boat channel to be dredged shall be no more than the minimum required for the safe operation of boats at minimum operating speeds.
7. No part of any septic tank system or any other sewage disposal system requiring on land or in the ground disposal of waste shall be located closer than fifty feet (50') from the edge of a W district boundary, unless it can be shown that no effluent can reach the wetland because of existing physical characteristics of the site. On site sewage disposal systems shall be permitted only if they meet state and city regulations.
8. Runoff from developed property and construction projects may be directed to the wetland only when reasonably free of silt and debris and chemical pollutants, and at such rates such as not to disturb wetland vegetation or increase turbidity.
9. No deleterious waste shall be discharged in a wetland or disposed of in a manner that would cause the waste to enter the wetland or other water resource area.
10. W district lands may not be used for disposal of organic refuse or garbage material typically disposed of in a landfill. No part of a wetland should be used for a sanitary landfill.
11. Lowest floor elevation of buildings located within the W district must be at least three feet (3') above the highest known water level.
12. No development shall be allowed in the W district which will endanger the health, safety, and welfare of persons or which will result in unusual maintenance costs to road and parking areas or the breaking or leaking of utility lines.
13. Removal of vegetation shall be permitted only when and where such work within the W district has been approved in accordance with the standards of this chapter.
14. Removal of vegetation within the W district but outside the wetland shall be limited to that reasonably required for the placement of structures and the use of property.
15. The proposed action will not cause storm water runoff to take place at a rate which would exceed the natural rate of runoff occurring from a rainstorm of a twenty four (24) hour duration and a once in two (2) year frequency.
16. Any increase in runoff due to the proposed action will be detained on the site for infiltration through the soil to the water table. Detention of water shall be calculated on the basis of 100-year frequency rainfall published by the U.S. weather bureau.
17. The quality of water infiltrated to the water table or aquifer shall remain undisturbed by the development of the site.
a. Drainage water shall be directed in such a manner as to travel over natural areas rather than across contaminated surfaces.
b. Treatment of runoff prior to release to natural drainage shall be provided for parking areas and land uses which manufacture products likely to contaminate ground water.
c. No portion of any septic tank drain field shall be located closer than four and one-half feet (41/2') from the highest known water table on the site or underlying bedrock.
18. Land shall be developed in the smallest practical increment at any one time and for only the shortest practical period of time, not to exceed a single construction season.
19. Sufficient control measures and retention facilities shall be put in place prior to commencement of each development increment to limit gross soil loss from the development site to not more than five (5) tons per acre per year.
20. Existing wetlands shall not be used as sediment traps.
21. Sediment yield from construction sites adjacent to streams and lakes shall not exceed two (2) tons per acre per year.
22. The person seeking the development permit shall be required to demonstrate that after the development is completed the conditions on the site will be stabilized such that the yearly soil loss from the site will not be greater than 0.5 tons per acre.
23. Development of woodlands shall not reduce the existing crown cover by more than fifty percent (50%). The removal of trees seriously damaged by storms or other act of God, or diseased trees shall not be prohibited. (1981 Code 402 § 7)
B. Other Permit Conditions: A permit hereunder may be approved subject to compliance with such conditions as are reasonable and necessary to ensure compliance with the requirements contained in this chapter. Such conditions may, among other things, limit the size, kind, or character of the proposed work, require the construction of other structures, require placement of vegetation, establish required monitoring procedures, stage the work over time, require the alteration of the site design to ensure buffering, or require public dedication or conveyance to the city or another public entity of such lands or interest therein as deemed reasonable and necessary by the city council. The city may require the posting of a bond in the amount of one and one-half (11/2) times the amount of work required under a conditional use permit. (1981 Code 402 § 8)