Construction of storm water pumping station near the existing North Lock Gate at St. Sebastian North Canal, in order to have a pumping discharge during times of high rainfall in Colombo Water Basin and high water level. The maximum storm water pumping discharge thus expected to achieve is 30m3/s. The proposed location for the Pumping Station is downstream of the existing North Lock Gate, which is located on the St. Sebastian North Canal at Nagalagam Street. The canal stretch included in the package runs from about 50m upstream of North Lock Gate up to Sedawatte Road Bridge, and the approximate length of this stretch is 300m.
It is proposed to construct a storm water pumping station at Nagalagam Street, across St. Sebastian North canal, in order to mitigate the floods by pumping flood water into Kelani River during periods of high water levels in Kelani River and high rainfall in Metro Colombo Basin.
The capacity of this pumping station is 30 m3/s, which comprises of 5 Nos. of 6m3/s pumps.
Main scope of this sub project includes ;
- Construction of gate structure and fixing of new vertical gates.
- Removal of existing structure which acts as a major bottle neck to flow.
- Construction of new pumping station and installation of pumps with screens and other mentioned equipment.
- Bank protection works.
- Dredging of canal.
