Agenda - 01-19-1999 - Attachment 3

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i jg dY� i•^ fi .- � 11 zt, 4 Fri COSY F PROPyOSED NSA ORDINANCE ..... �S e... .,.....:::.... ' :....,.. a.... 1 areas are not divided into numerous small parcels located in various parts of the 2 development. To the greatest extent practicable, this land shall be designed as a 3 single block with logical, straightforward boundaries. Long thin strips of 4 conservation land shall be avoided, unless the conservation feature is linear or 5 unless such configuration is necessary to connect with other streams or trails. The 6 open space shall generally abut existing or potential open space land on adjacent 7 parcels, and shall be designed as part of larger, contiguous, and integrated 8 greenway systems, as per the policies in the Open Space and Recreation section of 9 the Town's Ordinance. 10 11 SECTION 18. Subsection 15- 263(a)(2) is amended to read as follows: 12 13 (a) All developments shall be constructed and maintained so that they do not cause damage to 14 other properties with their surface waters. To achieve this objective, the potential impacts 15 on surface water quantity and quality from all proposed developments requiring special use 16 or conditional use permits shall be identified and evaluated by the town engineer, staff and 17 the environmental advisory board. The developer shall implement mitigation measures as 18 are determined to be necessary, based upon the results of this evaluation, to prevent or 19 lessen the predicted impacts. Potential impacts to be evaluated may include, but are not 20 limited to, backwater effects on upstream properties, increased volumes or rates of 21 stormwater flow, offsite sedimentation, erosion and/or ground -cover loss downstream, 22 increased scouring of any downstream streambed, lowered quality of water due to the 23 pollutants carried in runoff, or any damage that materially injures the value of adjoining or 24 abutting property. The area of study is not limited to the property being developed. 25 26 The Town will develop general technical criteria for the study of development impacts and 27 the implementation of mitigation measures to be used for the evaluation of proposed 28 development. The criteria will be updated periodically, as deemed appropriate. 29 30 SECTION 19. Article XVI is amended by adding a new Section 15 -269 to read as follows: 31 32 Section 15 -269 Buffers in Northern Transition Area 33 34 (a) The Board finds that: 35 (1) Soil and pollutants carried overland, primarily from roads, trails and land 36 disturbing activities, can be effectively trapped by leaving a relatively 37 undisturbed strip of vegetation parallel and adjacent to the watercourse. 38 (2) Properly managed overland water flow can be directed into this buffer in a 39 manner that will reduce velocity and cause dispersion of the water. 40 (3) Sediments and associated pollutants carried by the water will settle out as a 41 result of this slowing and dispersion process. 42 (b) For purposes of this section, the Transition Area portion of the Carrboro Joint 43 Development Area as identified in the Joint Planning Agreement dated November (Page 27 of 33