The Appin Upper Canal is a critical part of Western Sydney’s water supply system. Dating from 1888, the canal continues to take water 58 km from the Upper Nepean to Prospect Reservoir. The Appin Colliery lies under part of the canal infrastructure at Simpson’s Creek, near the township of Appin.
PSM was engaged to assess and mitigate the potential impacts on the canal and associated infrastructure due to underground mining.
Due to drought and other water storage issues, Sydney’s water supply was an extremely sensitive political issue. Maintaining the integrity of Sydney’s water supply was paramount.
The ability to collaborate with an interdisciplinary team of mining, structural, geotechnical, water, subsidence and heritage engineers and communicate with multiple government agencies, including Department of Heritage and Environment and NSW Department of Works and Services, was also critical.
Engineering and technical opportunities included:
PSM’s tailored approach included:
As a result of high-level collaboration, communication and technical expertise, the client gained approval to mine with no disruption to Sydney water supply during direct undermining.
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