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Local Water Supply Plan—Centerville GLOSSARY Agricultural/Irrigation Water Use-Water used for crop and non-crop irrigation, livestock watering, chemigation, golf course irrigation, landscape and athletic field irrigation. Average Daily Demand-The total water pumped during the year divided by 365 days. Calcareous Fen-Calcareous fens are rare and distinctive wetlands dependent on a constant supply of cold groundwater. Because they are dependent on groundwater and are one of the rarest natural communities in the United States, they are a protected resource in MN. Approximately 200 have been located in Minnesota.They may not be filled, drained or otherwise degraded. Commercial/Institutional Water Use-Water used by motels, hotels, restaurants, office buildings, commercial facilities and institutions (both civilian and military). Consider maintaining separate institutional water use records for emergency planning and allocation purposes. Water used by multi- family dwellings, apartment buildings, senior housing complexes, and mobile home parks should be reported as Residential Water Use. Commercial/Institutional/Industrial (C/l/1)Water Sold-The sum of water delivered for commercial/institutional or industrial purposes. Conservation Rate Structure-A rate structure that encourages conservation and may include increasing block rates, seasonal rates, time of use rates, individualized goal rates, or excess use rates. If a conservation rate is applied to multifamily dwellings, the rate structure must consider each residential unit as an individual user. A community may have a separate conservation rate that only goes into effect when the community or governor declares a drought emergency. These higher rates can help to protect the city budgets during times of significantly less water usage. Date of Maximum Daily Demand-The date of the maximum (highest)water demand.Typically this is a day in July or August. Declining Rate Structure- Under a declining block rate structure, a consumer pays less per additional unit of water as usage increases.This rate structure does not promote water conservation. Distribution System-Water distribution systems consist of an interconnected series of pipes,valves, storage facilities (water tanks, water towers, reservoirs),water purification facilities, pumping stations, flushing hydrants, and components that convey drinking water and meeting fire protection needs for cities, homes, schools, hospitals, businesses, industries and other facilities. Flat Rate Structure- Flat fee rates do not vary by customer characteristics or water usage.This rate structure does not promote water conservation. Industrial Water Use-Water used for thermonuclear power(electric utility generation) and other industrial use such as steel, chemical and allied products, paper and allied products, mining, and petroleum refining. Low Flow Fixtures/Appliances- Plumbing fixtures and appliances that significantly reduce the amount of water released per use are labeled "low flow".These fixtures and appliances use just enough water to be effective, saving excess, clean drinking water that usually goes down the drain. 37 82