Right Tunnelling Public Company Limited reported a new project in October 2021 in total value of THB 836,805,186.08 (including VAT). The project details are as follows construction project of Water Transmission Tunnel, Sta. 0+000 ? Sta. 2+750.308, Shaft No. 9A-1 and 9A-2. The Construction of Water Transmission Tunnel along Mahasawat Canal from Mahasawat Water Treatment Plant to Ratchapruek Road, and the Construction of Surge Tower of Mahasawat Water Treatment Plant including other related works (Contract: G-TN-9A). Project owner: Metropolitan Waterworks Authority.