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Appendix E — Definitions Agricultural Area: Communities that encompass areas with prime agricultural soils that are planned and zoned for long-term agriculture. Maximum allowable density is 4 units/40 acres. Aquifer: A saturated geologic formation that will yield a sufficient quantity of water to serve as a private or public water supply. Best management practices: A set of recommendations pertaining to the development and maintenance of varied land uses, aimed at limiting the effects of development, such as soil erosion and stormwater runoff, on the natural environment. See the Council's Urban Small Sites Best Management Practices Manual for specific examples of Best Management Practices. Conservation: The management of natural resources to prevent waste, destruction or degradation. Density: The number of dwelling units per net residential acre of land. Design to average flow ratio: The design average flow is calculated as the product of the long- term service area times 800 gallons per acre per day. This value represents an annual average flow from a service area for long-term development. Design peak average flow: The design peak to average ratio is the ratio of the peak hour flow used for hydraulic design divided by the design average flow. Design peak hour flow: The design peak hour flow is calculated as the product of the design average flow times the MCES specified peak to average ratio. Developable land: Land that is suitable as a location for structures and that can be developed free of hazards to, and without disruption of, or significant impact on, natural resource areas. Diversified Rural: Communities that are home to a variety of farm and nonfarm land uses including very large -lot residential, clustered housing, hobby farms, and agricultural uses. Located adjacent to the Emerging Edge Suburban communities, the Diversifies Rural designation protects rural land for rural lifestyles today with the potential of becoming urbanized after 2040. Maximum allowable density is 1-2.5 units for existing lots, and 1 unit/10 acres where possible. Emerging Suburban Edge: Cities, townships and portions of both that are in early stages of transitioning into urbanized levels of development. In the majority of these communities, less than 40% of the land has been developed. Parts of Emerging Suburban Edge communities are in the MUSA and all have a minimum average net density of 3-5 units/acre. Excessive Ill: a)1/1 that results in the communities wet weather flows to be violation of the Metropolitan Council's established I/I goals for the community. b)1/1 that causes the peak hourly flow to exceed the value determined by multiplying the average flow by the value of the peak to average ratio used by MCES to design interceptors and pump stations.c) I/I that exceeds 25 gallons per day per capita on a maximum monthly basis. 88