Rural Water Tunnel

Pressure tunnel with a lenght of 7 km (4.3 mi) and a diameter of 10 m (32.8 ft). Excavation in full face, top heading and invert according to encountered rock conditions. Initial support with lattice girders, steel fiber reinforced shotcrete and rock bolts. Grouting pipe spiling as pre-support for areas with deteriorated rock.

2 x 3 m diameter water tunnels (7.5 and 13.2 km long). More than 1000 m overburden.

11.6 m diameter shaft, approx. 45 m deep. Concrete segmental construction to 24.95 m OD. NATM construction to the base at -43.25 m OD with a 7.5 m span TBM launch chamber and mucking bunker, 40 m long, and 4.0 m diameter backshunt adit, 13.5 m long.

Hydro Electric Power Scheme. Diversion Works: 2 tunnels (1 km each). Outlet and Intake open cut slopes and bottom outlet shaft.

24.4 km long transfer tunnel, 4.2 m diameter.

Earth dam, two inclined spillway shafts and tunnels (12 m ID, inclined length 140 m, horizontal length 550 m), diversion tunnel (500 m long), power tunnel (8,5 m ID, 480 m long), surface power house and 3 km long grouting tunnel.

Power tunnel, lenght: 2300 m, diameter: 4 m, intake and intermediate shafts. Powerhouse, 20 m by 15 m in cross section, approx. 30 m deep.