The Melamchi Water Supply Project is a 26km tunnel traversing the lower Himalayas bringing water to Kathmandu. David provided technical and contractual project management services for the client.

The tunnel is drill and blast through gneiss and quartzite with some good areas of hard rock and some very soft areas of poor ground. The contract was constructed by an Italian contractor with a Scandinavian Engineer and designer.

The headworks includes several coffer dams a diversion tunnel and some desilting basins