Introduction

Upper Maiwa Khola Hydropower Project (UMHP) is being developed by Kang Hydropower Co. Ltd. (KHCL). KHCL has awarded Contract to Samyak Engineering Pvt. Ltd (SEPL) to prepare Detailed Project Report study and detailed engineering study of the project. The project has an installed capacity of 17.85 MW with a gross head of 515.00 m and design discharge of 4.19 m3/s.

Description

The project is a Run-off-River (RoR) type located in Taplejung District, Koshi Province. Headworks are on the left bank and other components are on the right bank of Maiwa Khola. Power is evacuated via 4.036 km long 132 kV transmission line to Dhungesangu substation.

Salient Features

Location:

• Province: Koshi
• District: Taplejung
• Municipality: Maiwa Khola & Meringden

Technical Parameters:

• Installed Capacity: 17.85 MW
• Gross Head: 515m
• Design Discharge: 4.19 m³/s
• Net Head: 491.72 m

Hydrology:

• Catchment Area: 66.12 km²
• Mean Annual Discharge: 6.51 m³/s
• Riparian Release: 118 L/s
• Average Annual Precipitation: 2169 mm

Structures:

• Weir Type: Free flow ogee, 25m length
• Intake: Side type, 2 openings
• Desanding Basin: Surface type, 56×6.1×5.38m
• Headrace Tunnel: 5026.5m, Inverted D

Electromechanical:

• Turbine: 2 Pelton units, 9.3 MW each
• Generator: Brushless synchronous, 10.5 MVA
• Transformer: 21 MVA, 11/132kV

Transmission:

• Voltage: 132kV
• Length: 4.036 km
• Conductor: ACSR WOLF

Cost & Timeline:

• Estimated Cost: NPR 3,698,532,313.00
• Construction Period: 36 months