2035 to 2065 almost half of the entire network will require replacing. There is a need to verify the assumptions in the projection. It is desirable to smooth the renewals programme to make the workload manageable and to avoid too much disruption to the system. Equally it is important to maximise the useful life of the underground assets but also to avoid failure to critical services and consequential flood damage. A timely programme of condition assessment through systematic CCTV survey will provide greater confidence in the condition grading and assist with future renewals programmes and is being planned for. BLENHEIMPICTONRIVERLANDSRENWICKSPRING CRKHAVELOCKANAKIWAOKIWISOUNDSSEDDONGROVETOWNGrand Total <10yrs 375 56 25 455 10-19yrs 1,832 710 2,542 20-29yrs 8,408 578 45 168 9,199 30-39yrs 29,701 1,092 792 138 149 31,873 40-49yrs 18,928 13,495 646 929 2,907 158 680 299 102 153 38,298 50-59yrs 11,140 1,172 203 190 214 244 76 2 13,241 60-69yrs 13,118 1,691 1,989 550 69 256 17,671 70-79yrs 14,509 3,484 340 1,977 151 193 214 21 20,889 80-89yrs 13,123 2,546 1,331 333 189 306 332 18,160 >90yrs 11,578 3,815 237 834 227 79 16,771 Grand Total 122,711 28,640 5,538 4,951 3,385 1,441 849 818 332 258 176 169,099 Table 6 Remaining Life of Stormwater Reticulation 4.1.5 Asset Valuation The stormwater drainage assets are valued annually. Details of the valuation, process and methodology are included in the Asset Valuation report and summarised in Chapter 6: Plan Improvement and Monitoring. A summary of the main asset values in 2014 is included in the table below Type Replacement Depreciated Annual Rate of Cost ($) Replacement Depreciation ($) Cost ($) Blenheim Pump Stations- Electrical $26,489 $11,655 $1,060 Pump Stations - Civil $118,600 $91,158 $1,186 Pump Stations- Mechanical $38,403 $15,813 $960 Reticulation $74,132,410 $47, 612,012 $879,947 TOTAL $74,315,902 $47,730,639 $883,153 Havelock Reticulation $428,758 $227,163 $5,603 TOTAL $428,758 $227,163 $5,603 Picton Pump Stations- Electrical $99,396 $79,517 $2,485 Pump Stations - Civil $395,326 $221,382 $3,953 Pump Stations- Mechanical $90,360 $72,288 $2,259 Reticulation $20,287,889 $12,637,403 $242,313 TOTAL $20,872,972 $13,010,590 $251,01 0 Page 39