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ORANGE COUNTY PLANNING & INSPECTIONS DEPARTMENT <br /> Craig N. Benedict, AICP, Director <br /> <��'�� �°�a, <br /> Erosion Control Division � � � .:. , �A 131 W. Margaret Lane <br /> (919) 245-2588 ,� �„=� '� ,� P O Box 8181 <br /> (919) 644-3002 (FAx) F��� Hillsborough, <br /> www.co.orange.nc.us �,�Q � �' ,,�a North Carolina, 27278 <br /> `�,�� �a,�°� <br /> � ai <br /> _ , � r <br /> � f� � 1 <br /> , � <br /> ,.� ..'��rr���i )) ���1/%%/ JIJIJJJI%/iii�% �%�r � /i�%,h,,�ii,a��/ii�"fi��ri�»>�, k�� ��i`i'���� �/ <br /> MEMORANDUM <br /> TO: Michael Harvey, Current Planning Supervisor <br /> FROM: Terry Hackett, Stormwater Resource Officer <br /> DATE: August 6, 2012 <br /> SUBJECT: Dunhill Subdivision - Preliminary Review Comments <br /> COPIES: Ren ivins, Erosion Control Supervisor <br /> Erosion Control/Stormwater Division staff have completed a review of the proposed Dunhill <br /> residential subdivision. Overall the project appears that it will meet the County's erosion control <br /> and stormwater requirements. Obviously, the project will require both an approved erosion <br /> control plan/land disturbance permit and an approved stormwater management plan. We <br /> understand that detailed engineering design is not completed at this time, but we add the <br /> following comments for the developer to include during detailed engineering design. <br /> Erosion Control <br /> 1. Mass grading will not be allowed. Typically we prefer that roads and utilities be <br /> completed prior to individual lot construction is started. <br /> 2. Skimmer basins with baffles will be required for drainage areas 1 acre or greater <br /> 3. Project will require an approved stormwater management plan from Orange County <br /> Erosion Control Division <br /> Stormwater Manaqement <br /> 1. Pursuant to Section 6.13 of the Orange County Unified Development Ordinance the <br /> entire project must meet the following nutrient loading requirements for stormwater <br /> runoff: <br /> Nitrogen 2.2 Ibs./acre/year <br /> Phosphorous 0.82 Ibs./acre/year <br /> 2. Nutrient calculations shall be completed by drainage area, account for any run-on, and <br /> will be based on a full build out scenario. <br /> O:AAdminstrativeASW Comments Dunhill Subdivsion 08062012.docx <br />