Agenda - 08-26-1991 - Laserfiche WebLink

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30 II. Proposed Rules and Classifications. A. Proposed Water Supply Protection Rules. In December 1990, the EMC adopted water supply watershed protection rules to satisfy the first of these statutory deadlines. The EMC established four classes of water supply protection: WS- I, WS -II, WS -III and WS -IV. In addition, the EMC adopted rules for land use and intensity, stormwater management and point source discharges within classification. These are minimum rules; local governments are encouraged to adopt more stringent standards. The rules are summarized in a table provided by DEM, included as Attachment 1. Since WS -I classifications are oriented toward undeveloped watersheds, this discussion will focus on the other three classifications and their rules. I. WS U. The classification of WS -II is appropriate for watersheds that are predominantly undeveloped. A Critical Area would extend one mile from and draining to a river intake or to the normal pool of a reservoir. In the Critical Area as well as the remainder of the watershed, only existing wastewater discharges would be permitted. Density limitations for both areas would be one dwelling unit per two acres or a maximum of six percent built - upon area. No high density option would be allowed, although the rules would permit up to ten percent of the area in the watershed to be developed for non - residential purpose to a maximum of 70 percent built -upon areas without stormwater controls. No sludge application, landfills or industrial uses would be permitted in the Critical Area. In the remaining portions of the watershed, sludge application and non - discharging landfills would be permitted. 2. - WS -111. The classification of WS -III is appropriate for low to moderately developed watersheds. A Critical Area would be defined as described for WS -II. In the Critical Area, no new wastewater discharges would be permitted. Density limitation would be one dwelling unit per two acres or six percent built upon areas. However, a high density option could be used, permitting up to 30 percent built -upon areas provided runoff from one inch of stormwater is controlled. No new industrial uses, landfills or sludge application sites would be allowed. If the high density option is used, local governments must assume responsibility for the operation and maintenance of stormwater controls. Restrictions would also apply to the remainder of the watershed. Only domestic and non- process wastewater discharges would be permitted. Density limitations would be one dwelling unit per acre or 12 percent built -upon surfaces, but a high density option is available. If development projects control runoff from one inch of stormwater, density limitations are relaxed to permit up to 50 percent built -upon areas. Likewise, local governments must'assume responsibility for the operation and maintenance of stormwater controls. As with WS -II, up to 10 percent of the watershed area outside of the Critical Area could be developed at up to 70 percent built-upon areas without stormwater controls. Sludge application sites are allowed, but no new discharging landfills would be permitted. 2