Ordinance No. 20351 - Laserfiche WebLink

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(e) Plantings shall not adversely affect adjacent protected water resources or existing native vegetation through shading or invasion by plant species introduced into the setback. (4) Construction Practices. Construction within the /WR conservation area, and within areas removed from the /WR conservation area shall comply with the following standards: (a) For purposes of this subsection, heavy machinery is defined as motorized or mechanized machinery or equipment capable of deliberately or inadvertently damaging vegetation, or damaging or compacting soil. The following standards shall apply to use of heavy machinery within the /WR conservation area: 1. On sites where soils are susceptible to severe compaction or structural damage when wet or saturated, use of heavy machinery shall be limited to the period between June 15 and September 30, unless otherwise approved by the planning director. 2. Use of heavy machinery shall be the minimum necessary for the use or activity and shall be restricted to those areas where its use is necessary. (b) Petroleum products, chemicals, or other deleterious materials used in the construction process shall not be allowed to enter a stream or wetland that is within a /WR conservation area. (5) Filling, Grading and Excavating. Filling, grading and excavating within the /WR conservation area and within areas removed from the /WR conservation area shall comply with the following standards: (a) Filling, grading or excavating of more than 500 square feet must comply with Erosion Prevention regulations for sensitive areas in EC 6.645. (b) Grading and excavating conducted as part of restoration or enhancement projects, and bank and channel reconfiguration shall result in topography that resembles landscapes shaped only by natural processes, for example, incorporating the undulations, meanders and slopes found in such landscapes. For purposes of this standard, straight lines and geometric or angular shapes are not acceptable. Channel and stream bank slopes shall not exceed 25 percent at elevations of 500 feet or less. (6) Impervious Surfaces. Within the /WR conservation area, construction of new impervious surfaces shall comply with the following standards: (a) Impervious surfaces are prohibited within the /WR conservation area unless they are part of a use approved in accordance with EC 9.4930(3). (b) Impervious surfaces that are part of a use approved in accordance with EC 9.4930(3) shall be no larger than the minimum necessary for the approved use. For sites with wetlands, impervious surfaces shall be located as far from the boundaries of locally significant wetlands as practicable. For riparian and upland wildlife habitat sites, impervious surfaces shall be located as far from the line of ordinary high water as practicable. . (c) Durable porous paving treatments or other infiltration devices approved by the planning director or decision-maker shall be used in lieu of standard impervious paving surfaces to increase infiltration of stormwater where practicable. This standard shall apply only to low volume parking areas, foot paths or lightly used access roads, where porous soils and flat topography will facilitate infiltration of runoff. For the purposes of this Ordinance - 16