Ordinance 3676-19 - Laserfiche WebLink

1. The buffer area has less than fifteen percent slopes,the existing buffer provides minimal vegetative proposed consistent with the following criteria: a. A mitigation plan consistent with Sections 37.120.D, E and F is approved by the director, including, but not limited to, maintenance, monitoring and provisions for an assurance device; b. The plan shall include plant densities not less than five feet on center for shrubs and ten feet on center for trees; 2. A site specific evaluation and documentation of buffer adequacy is based on consideration of the necessary to preserve or enhance anadromous fisheries consistent with WAC 365 195 900 through 365 195 925; and 3. Buffer width averaging is not utilized; and either 4. Structures, public roads,or other substantial improvements separate the subject upland property from the wetland and due to their height or width, prevent or impair the delivery of buffer functions to the wetland, in which cases the reduced buffer width shall reflect the buffer functions that can be delivered to the wetland; or 5. The wetland scores three or four points for wildlife habitat. Q. General Mitigation Measures. Implementation of all of the following general mitigation measures allow use of the reduced wetland buffers listed in Table 37.3. 1. Direct lights away from the wetland. 2. Locate activity that generates noise away from the wetland. 3. Route all new, untreated runoff away from the wetland while ensuring wetland is not dewatered. 4. Establish covenants limiting use of pesticides within 150 feet of the wetland. 5. Apply integrated pest management. 6. Retrofit stormwater detention and treatment for roads and existing adjacent development. 7. Prevent channelized flow from lawns that directly enters the buffer. 8. Infiltrate or treat,detain, and disperse into buffer new runoff from impervious surfaces and new lawns. 9. Use privacy fencing; plant dense vegetation to delineated buffer edge and discourage disturbance using vegetation appropriate for the ecoregion; place the wetland and its buffer in a separate tract. 10. Use best management practices to control dust. D. Buffer Width Averaging.The city may allow buffer width averaging; provided,that the total area on averaging will not reduce the wetland functions.The city may require buffer width averaging in order to provide protection to a particular portion of a wetland which is especially sensitive,or to incorporate impact the functions and values of the wetland.The adjusted minimum buffer width shall not be less than seventy five percent of the standard buffer width. 1. Protection of Significant Trees within the Buffer. If buffer width averaging is utilized and significant trees are identified on the outer edge of the reduced buffer such that their drip line extends beyond the a. A tree protection ar a shall be designed to protect each tree or tree stand during site development and construction.Tree protection areas may vary widely in shape, but must extend a minimum of five feet beyond the existing tree canopy area along the outer edge of the drip line of the trec(s), unless otherwise approved by the department. EMC Title 19.37 (Critical Areas) Page 33