Page 5 - WM Donald Newsletter - Edition Six

With the Drains Rehablitation Unit it’s an inside job
W M Donald has further extended the services it offers Drainage Services clients by establishing a specialist ‘Drain Rehabilitation Unit’ (DRU). The DRU’s capabilities range from simple patch repairs through to full length hot or ambient CIPP (Cured in Place Pipe) liners. These specialist skills sit alongside the traditional drain and sewer repair and rebuild work undertaken by the W M Donald civils team.
As one of its first assignments, the DRU has been carrying out patch lining repairs on defective 525mm drainage on the AWPR. No-dig repairs were specified because normal excavation techniques were too invasive and time was of the essence due to the road opening to the public within a few days.
Robert Tait, Section Supervisor on the Balmedie to Tipperty (B-T) section of the AWPR, emailed to thank the DRU team for their efforts:
‘Just a quick note in response to the fantastic pipe patching work W M Donald completed for us here at the AWPR B-T yesterday.
The pipes could not be accessed using the conventional method of dig and replace without adding major complications at a critical stage of the project.
Could you also please pass on my appreciation to your staff...who stayed later than anticipated to complete an additional repair which was discovered during a routine CCTV survey’.
Whale comes
to the rescue of other mammals
The AWPR is a huge and, most would say, long overdue highways project. In places the route has cut through the habitat of wild mammals and, to ensure their safe passage, dedicated culverts have been incorporated under the highway as it has been constructed.
As the project nears completion, W M Donald’s Drainage Services team has been brought in to remove any construction debris that has collected in the culverts.
Jim Strang, who leads the Drainage Services operation, says the project was ideal for the Kaiser Whale Recycler:
‘The culverts range in size from 600 to 900mm in diameter. As you’d expect the culverts are in relatively remote locations and, therefore there is no ready water supply. The Kaiser Whale recycles the water it uses by filtering the mud and solid waste it collects. The waste is captured in the Kaiser Whale’s waste tank and the water is returned to the jetting pump via a 500-micron Rotomax filter.’
Using the culverts requires a change of behaviour on the part of the mammals and the AWPR has been laying food and treacle in and around the culverts to encourage the mammals to use them.
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