Stormwater Drainage Asset Management Plan - District Council of ...

- 14 -Service ActivityPipes and pitsStorage BasinsDemand Management PlanWSUD – More overland flow, green swales, local detention basins, less imperviousareas on new developmentsRe-lining old pipes with poly inserts to prolong life.Greater compliance for surface water runoff pollution particularly on newdevelopments to reduce the silting up of pits, pipes and other water ways.Greater cleaning and flushing of the underground system to ensure full capacity isrealised.Clearing and widening of natural waterways to increase capacity and therefore theirrole in the stormwater drainage network.More use of GPTs on private property to arrest pollutants before they reach theCouncil network.Increased use of stormwater to wetlands as a ‘natural’ recreational asset.Increased re-use of stormwater in localised areas i.e. where it falls is where it is used.Local retention – water tank subsidy in-line with SA Water model.Table 4.3 Demand Management Plan Summary4.4 New Assets from GrowthThe majority of new assets required to meet growth will be acquired from land developments. The valueof new assets per new allotment are summarised in Table 4.4 below.Note: These values have been calculated using the 2007/08 Ascent Estate residential development as acase study and have been compared to other Councils in South Australia. As future developments in theDistrict are completed, these values will be reviewed and updated.Estate Name:AscentNo. of New Allotments: 116Average Allotment Size:680 sq.mMin and Max Range:512 sq.m to 1370 sq.mAsset Type Quantity DimensionReplacementValueValueper LotPipes 1786m $328,187 $2,829Pits 48 $85,248 $735Inlets/Outlets 2 $2,264 $20GPT 1 $17,250 $149TOTALS: $432,949 $3,732Table 4.4 Value of New Assets Per AllotmentAcquiring these new assets will commit council to fund ongoing operations and maintenance costs for theperiod that the service provided from the assets is required. These future costs are identified andconsidered in developing forecasts of future operating and maintenance costs.District Council of Mount Barker – Stormwater Drainage Infrastructure Asset Management Plan