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specified in the Stormwater Quality BMP Manual for Water Quality and Flow <br /> Controls, Projects or portions of projects which remove and replace impervious <br /> surface for the purpose of installing, repairing or maintaining underground utilities are <br /> exempt from this requirement unless such work involves the installation or <br /> reconstructlou.of a stormwater drainage system. <br /> Reconstruction of a stormWaterdrainage system shall be deemed to occur when more <br /> than SO°o of the existing drainage system components, such as catch basins, <br /> manholes, pipes, and ditches, are removed andreplaced, or when the value of work <br /> performed on the existingt rainage system exceeds 50% of its replacement value. <br /> ................ <br /> Requirements'for inclusion of stormwater quality treatment 13MPs shall notl''apply to <br /> public improvements that propose only to remove`and replace impervious surface for <br /> purposes of maintenance and repair for continuing the current function of the <br /> impervious suzfaceand which:do;hot include.:reconstruction of a stormwater drainage <br /> system. <br /> 2.02 DESIGN STANDARDS- STREETS, SIDEWALKS, BIKEWAYS, <br /> ACCESS WAYS <br /> Refer to Appendix E for the November 1999 Design Standards and Guidelines <br /> for Eugene Streets, Sidewalks, Bikeways, and Accessways. The information <br /> below provides greater detail to the standards, where needed for construction <br /> design review. <br /> 2.2 <br />