Ordinance 3676-19 - Laserfiche WebLink

bb. The trail surface meets all other requirements including all applicable water quality standards. Use of pervious surfaces is encouraged. c. Critical area and buffer widths shall be increased where possible, equal to the width of the trail corridor, including disturbed areas. d. Trails proposed to be located in landslide or erosion hazard areas shall be constructed in a manner that does not increase the risk of landslide or erosion and in accordance with an approved geotechnical report. e. Public and quasi-public trails shall include interpretive signs identifying the critical area and buffer specific to the site. 8. Stormwater facilities are allowed in stream and wetland buffers subject to all of the following criteria: a. Stormwater management facilities are permitted only within the outer twenty-five percent of the buffer. b. The subject buffer area has been previously substantially and legally altered and is unvegetated, sparsely vegetated, and/or vegetated with nonnative or invasive species. c. Stormwater facilities shall be integrated into the stream or wetland buffer as a natural drainage system.The slopes and all areas that are disturbed shall be planted with native vegetation consistent with a buffer enhancement/mitigation plan.Above ground concrete walls and structures are not permitted. Below grade structures may be permitted only if it can be shown to the satisfaction of the planning director that the use of such materials fits with the natural design of the proposed facility and does not interfere with wildlife passage or adversely impact biological functions of the buffer or the adjacent critical area. d. The location of a maintenance/access road is limited to the upland side of the facility outside the buffer. e. The facilities must include a buffer enhancement and management plan that would improve the functional performance of the buffer and associated critical area. f. All site development plans should consider low impact stormwater management techniques where site conditions allow as described in the Low Impact Development Technical Guidance Manual for Puget Sound,January 2005. g. For Type Np and Ns streams and Category II, III, and IV wetlands,the planning director may grant an exception to the outer twenty-five percent limitation when the applicant demonstrates that the project would significantly increase wetland or stream function and would not substantially alter stream or wetland hydrology.A significant increase in wetland function shall be defined as no reduction in any individual function as measured by the Western Washington Wetland Rating System, and at least a five-point overall increase in the combined function score as measured by the Western Washington Wetland Rating System. 19.37.070 - - - • - -• - •• - • - - - - • - •• - - - Critical area reports—General A. Submittal Requirements. Applications for land uses or developments proposed on lots on or adjacent to critical argas shall be filed with the planning department.The city may waive specific submittal requirements determined to be unnecessary for review of a specific application. All developments proposed on lots which may contain or adjoin critical ar as and/or buffers shall be evaluated by the applicant to provide the information necessary for the planning department to determine if and to what extent the site contains critical ar s. AB. —Supporting Information.All land uses and developments proposed on or adjacent to critical areas and their buffers shall include studies which describe the environmental conditions of the site. No Planning Commission Resolution 19-04 Page 18 Critical Areas March 19, 2019