The project utilizes a gross head of 684 m in the Khimti Khola river between the intake, at elevation 1,270m, and the tailrace water in the Tamakoshi River at an elevation of 586m. Total length of the waterways including headrace and tailrace tunnel is in excess of 11 km.

The hydraulic works consists of a low diversion dam, which leads the water through de-sanding chambers into the headrace tunnel. The tunnel is 7,620 meters long with an 11.5 square meter cross section, and ends in a surge chamber, from where a 898 meter long, 45 degree inclined penstock shaft, with steel lining embedded in concrete, leads to the powerhouse. A 1,418-meter long free flow tailrace tunnel with cross section of 15 square meters brings the water into the Tamakoshi River. An 890-meter long tunnel with a cross section of 22 square meters provides access to the underground powerhouse at Kirne in the Tamakoshi Valley, just upstream of the confluence with the Khimti River.

The hydraulic works commence with the head-works (intake) consist of a low concrete/boulder sill structure in the steep river, diverting water to a two chambered settling basin. The basin is located in the open and clear of floods on the right river banks, and includes a flushing system. De-sanding is particularly important in the "young himalayan mountains" with large amounts of loose material and heavy monsoon rains. This challenge has been solved in a relatively short geographical area through a flushing system called the S4. After the water leaves the flushing system it is lead into the headrace tunnel.

The tunnel is 7,885m long with a nominal 11.5 m2 cross section, and ends in a surge chamber, from where a 1,000 m long 45o inclined penstock shaft, with steel lining embedded in concrete, leads to the power house. A 1,433m long free flow tailrace tunnel with a cross section of 15.5 m2 brings the water into the Tamakoshi River.

An 890 m long tunnel with a cross section of 22 m2 provides access to the underground power house at Kirne in the Tamakoshi Valley, just upstream of the confluence with the Khimti River.

The installation in the powerhouse consists of five double jet Pelton turbines with runners fitted on the extended shaft of the 12,000 kilowatts, 750 RPM alternators. The power is transferred at 10.5 kilovolts from the generators through the cables in the access tunnel to the outdoor transformers where the voltage is stepped up to 138 kilovolts for the supply to the national grid and to 33 kilovolts for the local supply.

The outdoor switchyard is located near the powerhouse access tunnel portal, at Kirne Besi. The total annual production is in excess of 350 GWh.