Agenda - 04-02-1990 - Laserfiche WebLink

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25 Camp Dresser and McKee stated in the report that " . . .to be effective at managing future nonpoint pollution impacts, the 5-acre lot require- ment must be accompanied by a 4% impervious surface.ceilin9" and that "It is important to emphasize that a 4% imperviousness ceilin is an important component of a 5-acre lot development restriction. This is because a greater level of imperviousness on a 5-acre residential lot would produce higher nonpoint pollution loadings and Could reduce water quality benefit to the point where a land use control strategy is not at least as effective as a structural BMP strategy" [emphasis is in original text] . Structural BMP strategy refers to detention ponds. Orange-Chatham Work Group discussions In October, a work group including representatives of Carrboro, Chapel Hill and Orange County governing boards proposed a 13-point agreement for protecting the University Lake watershed and water quality of the reservoir. A copy of the proposed agreement is attached with a report to the Council from our October 23 meeting, when the Council generally endorsed the proposed agreement. Key points of the work group' s proposal include: A basic strategy of requiring 5 acres per dwelling unit, limiting impervious surface to 4% and use of individual septic systems. • Allowing lots under 5 acres which were recorded before October 2, 1989 to be developed with impervious surface limits of 6% for lots of between 2 and 5 acres, and 12% for lots less than 2 acres. Allowing up to 5 2-acre lots in parcels recorded as of October 2, 1989, with the 6% limit on impervious surface. Not allowing alternative community wastewater systems in the critical area of the watershed, and not allowing such systems in the remainder of the watershed before April 30, 1991. The joint planning jurisdictions would study whether to expand the critical area. Not allowing public sewer service in the watershed except to address a public health hazard or upon agreement of the joint planning jurisdictions. Studying whether to allow public water service in the watershed, with a study and report from OWASA requested to be complete by April 30, 1991. Studying possible use of transferable development rights for watershed protection purposes, and reviewing the Joint Planning Agreement to see how the watershed protection agreement could be incorporated. Consideration by Orange County In October, 1989, the Orange County Board of Commissioners adopted interim regulations for development in University Lake watershed. These regulations were adopted for the period through April 2, 1990.