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3. General Provisions_V1 <br /> <br />3-38 <br />4. In addition to the shrub cover required in the table above, all screens shall be <br />planted with large trees every 50 LF, medium trees every 35 LF, or small trees every 25 LF or <br />some combination thereof, along the length of the screen. <br /> <br />5. Existing vegetative screens should be left in place unless composed of invasive <br />species or otherwise directed by the City. Existing screens may be enhanced with new plantings <br />to comply with the standards. <br /> <br />6. Berms shall be irrigated, have maximum side slopes of 3:1, and have no less than <br />four (4) inches of topsoil. <br /> <br />7. Permanent walls and fences shall be offset by a <br />minimum of 2' at intervals of 75' maximum length for stability <br />and visual relief. See illustration. <br /> <br />8. Approved permanent wall/fence materials shall include wood, metal, masonry, <br />concrete stone, or other prefabricated and/or sustainable materials. Non-decorative concrete <br />block is prohibited for screening walls: rock face block or other decorative material is required <br />for masonry walls. Chain link fences with slats are prohibited for screening walls. <br /> <br />9. Maintenance of the required buffer strip planting and/or fence shall be the <br />responsibility of the individual property owners or, if applicable, the homeowners association. <br /> <br />(g) Boulevard Tree Standards: <br /> <br />1. Boulevard Trees shall be required in all new residential subdivisions. <br /> <br />2. Boulevard trees are required at the rate of one tree per lot frontage for single <br />family and two family lots. Townhome and Multi-family properties shall provide boulevard <br />trees at a rate of 1 tree per 70 linear feet of road frontage where property fronts any public road. <br /> <br />3. Boulevard trees shall be planted within 14 feet of the curb line or as otherwise <br />determined by the City Forester. <br /> <br />4. Existing trees may be used to fulfill boulevard tree standards at the City's <br />discretion. <br /> <br />5. The City may, at its discretion, purchase and install the required boulevard trees. <br />In such case the City shall collect a standard fee per tree. Said fee shall be established by the <br />City Council and based on the estimated market rate cost to purchase and install trees within the <br />development site. <br /> <br /> <br />(h) Sod and Ground Cover. All areas not otherwise improved in accordance with the <br />approved site plans shall have a minimum depth of four (4) inches of topsoil and be sodded