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4) The width of an attached garage shall not exceed 40 percent of the width of the entire principal <br />building facade (including garage) fronting the primary street. <br />d) Landscaping standards. <br />1) A landscape plan for the entire site is required and shall consist of at least ten trees per acre of <br />building site lot area; and trees shall not be not less than 1.5 inches in caliper measured at 54 inches <br />above grade level. <br />2) Boulevard landscaping is required along all streets to consist of at least one tree per every 30 feet <br />or placed in clusters at the same ratio. <br />e) Impervious surface standards. The maximum impervious surface allowable within an open space planned <br />unit development shall be not exceed 25 30 percent of the lot. land area not dedicated as preserved open <br />space subject to the following: <br />1) Impervious surfaces created by roads, trails, and other planned impervious improvements shall <br />count against the maximum allowed impervious coverage. <br />2) Remaining allowed impervious surface acreage may be distributed between the planned building <br />sites, and maximums for each lot shall be clearly documented within the overlay district ordinance <br />governing the development. <br />f) Trail and sidewalk standards. A trail system or with sidewalks shall be established within open space <br />planned unit developments in accordance with the following: <br />1) The linear footage of trails provided shall be at least equal in length to the sum of the centerline <br />length of all public roads within the development. <br />a. A sidewalk shall be constructed along the lot frontage on one (1) side of the road. <br />b. A required trail shall be provided on the other side of the road or within the open space of <br />the development. Additional asphalt trails shall be required to create connections to other <br />developments and public places. Trails may be required to exceed the sum of the centerline <br />length at the discretion of the community development director or city engineer. <br />2) All trails shall be constructed of asphalt or concrete in compliance with the standard city design <br />for trails. <br />3) Proposed trails shall provide connections between and access to the buildable land areas and <br />preserved open space land being created by the development. <br />4) Proposed trails shall connect to existing, planned, or anticipated trails or roads adjacent to the <br />development site and on adjacent parcels. <br />5) If applicable, trails shall be linked (or be designed to provide a future link) to the Old Village to <br />emphasize the connection between existing and new development. <br />105.12.1070 Open Space PUD Review Criteria <br />The following findings shall be made by the city council prior to approval of a new or amended open space <br />planned unit development: <br />a) The proposed development is consistent with the goals, objectives, and policies of the comprehensive <br />plan. <br />b) All prerequisites for an open space PUD as outlined in LEC 105.12.1030 are met. <br />c) All open space PUD design standards (as outlined in LEC 105.12.1050) and all open space development <br />standards (as outlined in LEC 105.12.1060) are met; or if deviations are proposed, that all such deviations <br />are supported because they achieve the following three goals: <br />1) The deviations allow for higher quality building and site design that will enhance aesthetics of the <br />site; <br />2) The deviations help to create a more unified environment within the project boundaries by ensuring <br />one or more of the following: architectural compatibility of all structures, efficient vehicular and <br />pedestrian circulation, enhanced landscaping and site features, and/or efficient use of utilities; and <br />3) The overall design provides appropriate solutions to eliminate adverse impacts that proposed <br />deviations may impose on surrounding lands.