4.6 Disposal Plan Disposal planning recognises there are costs and consequences to the decommissioning and disposal of redundant assets. Underground assets are generally left buried but capped to prevent them from acting as land drains. Surface features are removed and the surface reinstated. Component parts are salvaged and re-used wherever practicable. Decommissioned pipelines may have value as ducts for other service providers although their value is not formally recognised in the re- valuation process. The position of the pipelines remains on the geographical information system (GIS) and archived as ‘expired’ assets in the AMIS. The expected replacement of the Nelson Street pump station, the Dublin Street Pump Station, the Picton Waikawa-Picton trunk sewer upgrade and the Blenheim North-East trunk sewer upgrade will all replace significant existing assets that will need to be decommissioned and disposed as part of the project. The disposal costs have been included in the budget projections. Page 71