Blenheim Stormwater Strategy - Action Plan 4 Schedule 3 – Asset Management and Flooding Actions # Action Priority Timeframe Indicator 4a Determine the level in the roading hierarchywhere it is acceptable to have flooding by High Short secondary flows 4b Develop specific outcomes sought in relationto each type of land use, in particular set High Short standards for the level of protection that should be offered to open space, commercial, industrial and residential development. 4c Prepare comprehensive flood maps for eachSMA to identify areas where insufficient Medium Ongoing capacity in network exists. This should occur as part of the SMAP for each specific catchment. 4d Develop a transparent framework for makingdecisions in relation to how network flow Medium Medium problems will be solved in each catchment. 4f Undertake further evaluation of Flow levels toassist in providing clear guidance for asset Medium Medium managers and future developments. 4h Infill subdivision development will not beapproved until the network can accept flow High Ongoing without compromising standards. 4i Existing serviced development can only occurwhere capacity exists: define acceptable Medium Medium standards and future growth areas. 5a Reduce hydrological effects of development onmore frequent storm peaks to manage Medium Medium potential effects on stream morphology and erosion. 5b Minimise the impact of new greenfieldsdevelopment on existing, runoff patterns, High Medium including requiring new development to limit peak runoff rates to existing levels and minimise runoff volumes. 5c Identify and map areas where discharge toground or ground soakage is possible and High Short appropriate, and ensure this is linked into the WARMP and building consent processes. 5f Develop agreed maximum limits of siteimpervious coverage that are appropriate for High Medium each catchment, and ensure rules and/or education measures are in place to minimise the amount of impervious cover of keep it Beca // 28 May 2009 4260171 // NZ1-1630756-12 0.12 Page 121