Marlborough District Council Roading Assets - Activity Management Plan 2015 - 2018 SECTION 1 EXECUTIVE SUMMARY level of expectation. Mitigation in these cases is possible by the application of heavily focussed and regular maintenance closely tied to resident committee liaison or by the sealing of the unsealed portions of road. Dust Generation Unsealed roads with high HCV movements (particularly forestry) cause significant dust issues for adjacent property owners. The generation of dust can cause, loss of production, health issues, safety issues and general nuisance Previous attempts to apply a level of service for dust have proved difficult to measure and difficult to apply in practice. Trial dust reduction systems i.e. Otta Seal, Dust Pallatives and stabilisation are programmed for the 2014/15 construction season. Following the results of the trials and more understanding of the costs of dust mitigation a ‘Dust Mitigation’ strategy will be developed for unsealed roads. Unsealed Rehab / Reconstruction Whilst an NZTA survey of unsealed roads concluded these roads were in good condition, complaints indicate that re-metalling, grading frequency and general ride-ability is not always acceptable. In November 2004 the Transfund New Zealand Technical Review of Local Roading in the Marlborough District recommended that the Council would get significantly better unseal road conditions if investment was made into a programme of unsealed road pavement rehabilitation based around applying a proper bound pavement dressed with an unsealed running course. Implementation of this recommendation has been considered and trials done on critical sections of the network. The review team considered that once a stronger pavement was established the maintenance cost and the level of public complaint should both drop. A reduction in dust was also noted to be an outcome from better unsealed pavements. Limited trials have been undertaken on Onamalutu Rd interim results show potential but further analysis is required. Aggregate Sources The FWP for the unsealed roads asset also takes into account the increasing difficulty in sourcing suitable metals in many of the Sounds areas. Investigation into alternative pavements and into the use of lower grade rock is ongoing. To date the following alternative metal sources have been tested and found suitable for use a maintenance metal: Coopers Quarry, Awatere Valley Ballochdale Quarry, Upton Downs Orr Hill Quarry, French Pass Rd Importing high class metal by road or sea is not considered to be a viable option. Council may need to consider requiring that specific metal resources in areas where development has denuded the supply, be held in trust for use on public roads. Limitations on the extraction of gravels from the Wairau and Awatere Rivers by MDC Rivers or Planning sections can potentially impact of the cost of roading aggregates. There should be close liaison with the various sections of the Council to minimise this impact and align expectations. 1.6.2.8 Disposal Plan Disposal is any of the activities associated with disposal of a decommissioned asset, including sale, demolition or relocation. Redundant road reserve following realignments for example is usually transferred to adjoining landowners. Under this AMP there is no requirement for disposal of any part of the unsealed road network. 30 September 2014 Page 56 of Section 1