Avissawella Drainage System
Avissawella Stormwater Drainage System
Client: Urban Development & Low Income Housing Project / ADB
Client Address: -
Source of Funding: -
Approx. Value Contract: LKR 90 million
Approx. Value of Services: LKR 8.9 million
Location: Avissawella
Start Date: February 2000
End Date: March 2003
Duration of Assignment: 21 months
Name of Associated Consultants: -
Description of the Project: Project to improve the storm drainage conditions of the Avissawella town centre and environs. Priority flood prone areas include the town centre and court complex, Kudagama road, Puwakpitiya. The project will be carried out in three stages; feasibility study, design stage and construction supervision stage.
Scope of Work: The consultants carried out socio-economic survey of project area, survey of drains and streams, identified sub catchments and catchment characteristics, carried out hydrological and hydraulic studies, environmental assessment, prepared conceptual designs, prepared preliminary estimates, carried out an economic analysis and presented a Feasibility Report. As Stage II carried out further field investigations, prepared detailed designs of improvements to drainage system, prepared drawings, BOQs, specifications, tender documents, engineering design report, O&M manual. As Phase III the consultants are engaged in construction supervision including clearing and widening of canals and drainage network, construction of culverts, drainage and flood control structures and retaining structures, preparation of working drawings, progress monitoring, cost and quality control, approval of contractor’s work program, monthly payments, extra works and variations, preparation of maintenance guidelines, assistance to handover project.