ABOUT PROJECT

Union Mewa
Hydropower Project

Our flagship projects is the Mewa Khola Hydropower Project, a ground breaking initiative designed to harness the energy of the Mewa River. The Mewa Khola Hydropower Project is a run-of-river hydropower project located in the picturesque region of Koshi Province Taplejung district Mikwakhola Rural Municipality with a total installed capacity of 23 MW, the project is designed to provide clean, renewable energy to the national grid, reducing the dependency on fossil fuels and contributing to the country’s energy security.

Our Mission

Tomorrow's
Promise, Today's Investment
Mewa Khola

To be a global leader in sustainable energy, pioneering innovative hydropower solutions that power progress while preserving our planet. We envision a future where renewable energy is the foundation of economic growth, environmental stewardship, and energy security, ensuring a cleaner, greener world for generations to come.

Features

Salient
Technical Features

SN General Salient Features
1 General
Name of the project Mewa Khola Hydropower Project
Project Location/ Boundary:
Zone Mechi
District Taplejung
VDC / Rural Municipality Papun VDC / Mikwakhola RM
Latitude 27º33’06” N to 27º35’33” N
Longitude 87º35’14” E to 87º37’00” E
Type of Scheme Run-off-River (ROR)
Water Source Mewa River
2 Hydrology
Catchment Area at Intake 66.75 km2
Catchment Area at Powerhouse 94.30 km2
Design 100-yrs flood 162.50 m3/s
Design 500-yrs flood 236.3 m3/s
Annual Rainfall 2540.31 mm
3 Power Development
Design Discharge 3.15 m3 /s
HW elevation 2925.00 m amsl
CL of Turbine 2023.26 m amsl
Gross Head 901.74m
Net Head 884.81 m
Head loss 16.93 m
Installed Capacity 23 MW (Upgradation In Progress)
4 Weir
Type of Weir Broad Crested
Size (L x H) 12.00 m x 3.00 m
Weir Crest Level 2915.60 m
5 Under sluice
Number of bays 1
Size (W x H) 3.50 m x 2.40 m
Sill Level 2911.00 m amsl 2911.00 m amsl
6 Intake
Type Side Intake, 2 nos.
Size 2.00 m x 1.00 m (W x H)
Intake Sill Level 2914.00 m amsl
7 Gravel Trap
Size (L x W) 8.50 m x 6.50 m
Flushing Gates Clear Size (W x H) 1.00 m x 1.45 m
8 Emergency Spillway
Width of Spillway at Beginning 6.60m
Width of Spillway at End 2.00m
Length ~8.50 m, 1:50 Slope
9 Approach Culvert
Type Open channel flow
Length, main culvert ~31.27 m
Length, branch culvert ~22.00 m each (2 nos.)
Size (W x H) (main culvert) 2.00 m x 1.75 m
10 Desander
Type Double bay intermittent flushing, Surface
Size (L, including transition x W x H) (13.90+45.10) m x 6.50 m x (4.35 m (at beginning) and 5.53 m (at end) (13.90+45.10) m x 6.50 m x (4.35 m (at beginning) and 5.53 m (at end))
Desander Outlet Clear Size (W x H) 4 Nos., 1.5 m x 0.8 m
Flushing Gates Clear Size (W x H) 2 Nos., 1.00 m x 1.00 m
11 Head pond
Type Trapezoidal
Length 15.60 m
Width 13.60 m at start, 2.30m at end
Height, average 4.15 m (1.60 m at Desander outlet & 6.68 m at HRP inlet)
Retention time 2 min
12 Headrace Pipe
Diameter of pipe 1.30 m
Length 77.00 m (Including siphon crossing)
13 Headrace Tunnel
Type Inverted D Shape
Diameter (W x H) 2.20 x 2.50 m
Length 3687.56 m
14 Surge Shaft
Height 28.30 m
Diameter 4.00 m - 4.20 m - 4.40 m
15 Steel Penstock pipe
Type Underground and surface
Length 1479.03 m (without bifurcation)
Diameter of main pipe 1.10 m
Bifurcation pipe length 23.12 m each
Diameter of bifurcation pipe 0.80 m
Section Breakdown
Surface ~1062.06 m
Vertical Shaft (including bends) ~200.49m
Horizontal Tunnel (after Surge Shaft) ~69.5 m
Horizontal Tunnel (before Powerhouse) ~146.98 m
Bifurcation tunnel length ~19.715 m x 2 no
16 Powerhouse
Type Surface
Size (L x B x H) 29.23 x 13.00 x 17.58 (Height including roof height and machine foundation)
Tailrace Culvert (long culvert) 30.35 x 1.00 × 2.0 m (L x H×B)
Switchyard 132kV Outdoor Switchyard with River Crossing
17 Turbine
Type Pelton, horizontal shaft
No. of Turbine 2
Centre line 2023.26 m amsl
Design Discharge 2 x 1.575 m3/s
Turbine efficiency 92.00%
18 Generator
Type Synchronous, cylindrical pole
Rated Output Capacity per unit 16200 kVA
Generation Voltage 11000V
Frequency 50Hz
No. of Units 2
Excitation Brshless Brushless
Efficiency 97.00%
Synchronous Speed 750 rpm
19 Transformer
Type In door Oil Immersed
Cooling OFWF
Number of Units 2 Nos. + Spare parts
Rated Capacity 15 MVA x (2 nos. + 1 set Spare)
20 Transmission Line and Grid Connection
Transmission Line 132 kV Single Circuit
Grid connection Dhungesangu Substation
21 Construction Period
Construction Period of the Project 3.00 years
Location

Mewa Khola Location

Union Mewa

Project Layout

Participants

Project Participants

Ministry of Energy (MoE)

Department of Electricity Development

POWER PURCHASER

Nepal Electricity Authority

Nepal Electricity Authority (NEA) was created on August 16, 1985 (Bhadra 1, 2042) under the Nepal Electricity Authority Act. 1984, through the merger of the Department of Electricity of Ministry of Water Resources

Lenders

Our Banking Partners

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Progress

Mewa Khola
Working Progress

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river-flow
drilling
station
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working
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