The project's design work has been completed in phases since 2017. The relocation plan will be implemented by stages, including site preparation and access tunnel construction, main caverns construction and upstream sewerage collection works, sewage treatment facilities installation, as well as decommission and demolition of the existing Sha Tin STW. The whole project is anticipated to be completed in about 13 years. The future Sha Tin STW relocated in a cavern complex will be the largest of its kind in Hong Kong.
The relocation will release about 28 hectares of land on the existing Sha Tin STW site for other uses that benefit the public and improve the living environment of the district. Upon relocation, the STW's maximum design sewage treatment capacity is 340,000 cubic metres per day, which is about 36% greater than that of the existing facility. The Sha Tin Sewage Treatment Works (STW) is earmarked for relocation to a number of caverns to be excavated in Nui Po Shan opposite Shing Mun River.
To expand and make good use of land resources, the Government has been actively exploring viable solutions for developing rock caverns. Planning, Design and Construction of New Sewerage Facilities Relocation of Sha Tin Sewage Treatment Works to Caverns
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