Site design process. As part of the submittal of a sketch plan or preliminary plan, whichever comes first, for a major subdivision or land development that involves over 10 acres of land for a nonresidential project or 20 or more dwelling units for a residential project, the applicant shall provide the following mapping and prove to the Planning Commission that the following process was followed in designing the proposed development.
A. Applicants are strongly encouraged to submit these maps as part of the sketch plan process, to avoid delays to the applicant in preliminary plan approval. Submittal at the sketch plan stage will greatly increase the likelihood that all issues will be able to be resolved in time to meet the standard ninety-day time clock for approval of a preliminary plan, without needing time extensions.
B. This process is intended to show how the special features of the property relate to resource areas on adjacent lands, and how the development will properly relate to the features of the land that are most worthy of conservation. See the "Existing Resources and Site Analysis Map" provisions in §
475-15. Existing conditions shall be accurately mapped.
(1) Delineation of open space. Using the map of Existing Resources and Site Analysis Map, the applicant shall delineate areas that are proposed to be preserved as Common Open Space (if required in an open space development by other sections of the Joint Zoning Ordinance) and/or otherwise through conservation easements. If common open space in a development is proposed, then the applicant shall show compliance with the applicable requirements of Chapter
540, Zoning, including but not limited to the following:
(a) Providing calculations of the minimum percent and acreage of required common open space, which shall be submitted at the sketch plan stage or the preliminary plan stage, whichever submission occurs first.
(b) Proposed common open space shall be designated using the existing resources and site analysis map as a base map. The applicant shall prove compliance with applicable provisions of Chapter
540, Zoning. The following areas shall be shown: 100-year floodplains, wetlands and slopes over 25%.
(c) The proposed common open space shall maximize opportunities to interconnect open spaces with important natural features and common open space on neighboring properties (see the "context map").
(d) The applicant shall then prioritize natural and historic resources on the parcel in terms of their highest to least suitabilities for inclusion in the proposed common open space in consultation with the Planning Commission and in accordance with applicable sections of Chapter
540, Zoning.
(e) On the basis of those priorities and practical considerations given to the parcel's configuration, its context in relation to resource areas on adjoining and neighboring properties, and the applicant's subdivision objectives, priority areas for conservation shall be delineated to meet at least the minimum area percentage requirements for common open space and in a manner clearly indicating their boundaries as well as the types of resources included within them.
(2) If open space in a development is not proposed, the applicant shall show measures that will be used to minimize impacts upon important natural features. The applicant shall show that every reasonable effort has been made to locate development to: a) avoid the over 25% slopes, 100-year floodplain and wetlands, and b) minimize impact upon other natural and historic resources. In addition to meeting any requirement for common open space, important natural features should also be protected as part of individual lots (such as large rear yards and/or through conservation easements).
C. Potential development areas concept map. Based upon consideration of the existing features map and the process described above, the potential development areas shall be mapped. These potential development areas are areas that are best-suited for the majority of the development on the parcel.
D. Location of home sites. In respect of the process described above, the approximate proposed locations of new homes/principal buildings shall then be selected. It is recognized that on-lot septic system suitability needs to influence these choices, when septic systems are used. It is also recognized that some intrusions into the natural and historic resources may be necessary to allow reasonable uses of the land, provided that such development is carefully located and designed to minimize impacts upon valuable resources and features.
(1) While the mapping of existing features required by this section is required to be accurate and to scale, the locations of proposed home sites, lot lines, roads and trails may be at a sketch plan level of detail for the purposes of complying with this section.
(2) The applicant shall provide a written and graphic analysis of how the proposed development will respect and incorporate the important resources of the site and be coordinated with resources, open space/trail corridors and views on surrounding properties. This may involve an overlay map that shows important natural features and proposed development.
E. Layout of streets and trails. A tentative street layout shall then be designed to serve the appropriate building sites. Trails should also be considered to link together common open spaces, clusters of homes and other destinations (such as nearby stores, parks and schools). Building sites should be clustered together to minimize expensive wetland and creek crossings by roads.
F. Drawing the lot lines. Tentative lot lines should then be drawn on the site to encompass the proposed building sites to result in a development concept plan. Once this plan is prepared, then more detailed engineering may be completed.