08-08-2022 City Council Packet - Laserfiche WebLink

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the shoreline buffer area to ensure conformance with this Declaration. b. No above- or below -ground structure or impervious surface will be placed within the shoreline buffer or upland habitat permanently or temporarily, except as follows: i. A structure may extend over or be suspended above the shoreline buffer or upland habitat if the impact of any supports within the shoreline buffer or upland habitat is negligible, the design allows sufficient light to maintain the species shaded by the structure and, for shoreline buffer, the structure does not interfere with the protection afforded by the shoreline buffer. ii. A public utility, or a structure associated with a public utility, may be located within a shoreline buffer or upland habitat if the City has concurred in writing that there is no reasonable alternative that avoids or reduces the proposed intrusion. The utility or structure shall minimize the area of permanent vegetative disturbance. iii. Shoreline buffer or upland habitat may enclose a linear surface no more than 10 feet in width and, for buffer, no less than 25 feet from the delineated shoreline edge for non -motorized travel if shoreline habitat will not be measurably reduced. Trail edge mowing is not permitted. c. Shoreline buffer maybe disturbed to alter land contours or improve buffer function if the following criteria are met: i. An erosion control plan is submitted to the City under which alterations are designed and conducted to expose the smallest area of disturbed ground for the shortest time possible; fill or excavated material is not placed to create an unstable slope; mulches or similar materials are used for temporary soil coverage; and permanent native vegetation is established as soon as possible. ii. Wooded buffer and native riparian canopy trees are left intact. iii. When disturbance is completed, sheet flow characteristics within the buffer are improved; average slope is no steeper than preexisting average slope or 5:1 (horizontal:vertical), whichever is less steep (preexisting slopes steeper than 5:1 containing dense native vegetation will not require regrading); the top 18 inches of the soil profile is not compacted, has a permeability at least equal to the permeability of the preexisting soil in an uncompacted state and has organic matter content of between five and 15 percent; and habitat diversity and riparian shading are maintained or improved. iv. A re -vegetation plan is submitted to the City, specifying removal of invasive species and establishment of native vegetation suited to the location. 2