• Address: Sushmit Bhawan -2nd Floor, House No 166/40467 Subidhanagar - 35 Kathmandu, Nepal
  • Call Us: +977-15199027
    Fax No.+977-5199454

MYAGDI KHOLA HYDROPOWER PROJECT (57.3 MW)

MYAGDI KHOLA HYDROPOWER PROJECT

The Myagdi River is located in Myagdi District and its source can be traced back to Mt Dhaulagiri. It flows through Myagdi district and converges with Kaligandaki River. It is a stream type river that is at an elevation of 854 meters (2,802 feet). The Myagdi Khola Hydropower Project is a Run-of-River scheme that utilizes the the flow in Myagdi Khola. It is located in Myagdi District, Dhaulagiri Zone of Western Development Region of Nepal.The headworks is located at the Kunaban/Myagdi confluence and the powerhouse is located at Jeltun Village.

The proposed project has installed capacity of 57.30 MW , design discharge of 12.50m3/sec and net head of 537.23m.

  • General

    Name of project : Myagdi Khola Hydropower Project
    Name of River : Myagdi Khola
    Type of Scheme : Run-of-River (ROR)

    Location
    Longitude : 83°25'00" E to 83°21'50" E
    Latitude : 28°38' 00''N to 28°33' 20'' N
    District : Myagdi
    Headwork : Dovan just d/s from the Kunaban/Myagdi confluence
    Power house : Jeltun Village
    Access Road : 20 Km (From Darbang to PH); 8 Km(From PH to HW)

    Hydrology
    Catchment area at intake site : 306 km 2
    Design flow (Q40) : 12.50m3/s
    Average monthly flow : 23.56m3/s
    Design flood at intake (1 in 100 years) : 659.46m3/s
    Design flood at powerhouse (1 in 100 years): 731.49m3/s

    Weir
    Type : Broad crested weir
    Crest elevation : 2417.00masl
    Crest length : 15.00 m
    Height : 4.00 m above river bed

    Undersluice
    Type : Orifice flow
    Discharge : 133.47m3/s
    Number of openings : 2
    Size of openings : 2.50m x 3.40m (W x H)

    Intake
    Type : Side intake (Orifice type)
    Number of openings : 3
    Size of openings : 2.80 m x 1.80 m (W x H)
    Invert Level : 2414.5.0 masl
    Normal Water Level : 2417.00 masl
    Design Discharge : 15.00m3/s

    Gravel Trap
    Normal Water Level : 2416.83masl
    Length : 9.80 m
    Size : 10.40m x 6.70m (W x H)
    Bed slope : 1 (V) in 5 (H)
    Particle to be settled : 4 mm
    Flushing system : Continuously during high & intermittently during the low flows Size of flushing gate : 1.00m x 1.00m (W x H)
    Gravel flushing canal : 34.00m x1.00m x1.45m (LxWxH)

    Feeder Tunnel
    Type : Free flow
    Length & Slope : 439 m
    Finished size : 3.20m x 3.50m, D-shaped

    Bifurcated Feeder Tunnel
    Type : Free flow
    Length & Slope : 39.88 m
    Finished size : 3.20m x 3.50m, D-shaped

    Underground Desanding basin
    Type : Hopper
    Particle to be settled : 0.15 mm
    No of chambers : 2 in parallel
    Trapping efficiency : 100% (Camp’s theory) & 87.42% (Vetter’s theory)
    Transition length : 22.10 m
    Dimension : 95m (L) x 10m (W) x 11.21m (H)
    Flushing system : Intermittent

    Flushing Tunnel
    Size : 4.00m x 4.50m, D-shaped
    Length : 230.20m

    Desander Gate Operating Tunnel
    Size : 3.20m x 3.50m, D-shaped
    Length : 266.95m

    Headrace Tunnel
    Size : 3.20 x 3.50 m, D-shaped
    Length : 5644 m

    Surge Tank
    Size : 8 m (internal dia)
    Height : 41 m
    Max water level : 2429.68 masl
    Min water level : 2398.34 masl

    Penstock
    Surface Penstock
    Size : 1.8 m to 2.0 m
    Length : 1069 m up to bifurcation 45 m after bifurcation
    Thickness : 12 to 42 mm
    No of anchor blocks: 6

    Vertical Shaft (2 Nos)
    Length of shaft : Shaft-1=141 m ;Shaft-2=238 m
    Size : 3.5 m dia of each


    Horizontal inverted D-shaped Tunnel
    No of tunnel : 2
    Size : 4.0 m x 4.0 m (W x H)
    Length of tunnel : Tunnel -1=184 m; Tunnel -2=250 m

    Powerhouse
    Size of powerhouse : 44.5m x 14 m x 22 m (LxWxH)
    Turbine type : Pelton (vertical axis)
    Turbine axis level : 1853 masl
    No of turbine : 2
    Length of tailrace : 60 m
    Size of tailrace : 4.5m x 2.6m (WxH)
    Switchyard : Surface type
    Size of switchyard : 50m x 30m (LxH)
    Switchyard location: 1851.40 masl
    Transmission line : 65 km
    Evacuation point : Dana S/S

    Power & Energy
    Installed capacity : 57.30 MW
    Gross head : 564.00 m
    Net head : 537.23 m
    Dry Energy : 55.06 GWh
    Wet Energy : 279.3 GWh
    Plant factor : 66.61%