| Project location |
|
| Region |
Eastern Development Region |
| District |
Ilam |
| Zone |
Mechi |
| Intake site |
Danabari VDC |
| Powerhouse site |
Danabari VDC |
| Access to the project site |
Via. East-west highway up to Birtamode and about 25 km long blacktopped/ graveled link road north from Birtamode |
| Geographic Coordinates |
|
| Longitude
|
87052’1.92” E to 87053’9.16” E |
| Latitude
|
27045’43.37” N to 27047’39.78” N |
| Altitude |
155 - 200 m (amsl) |
| General |
|
| Name of the river |
Mai Khola |
| Nearest Town |
Birtamode Bazar |
| Types of Scheme |
Run-of-river |
| Gross Head |
42.65 m |
| Net Head |
34.59 m |
| Installed capacity |
7,000 kW |
| Average annual estimated energy |
38,422,444 KWh |
| Hydrology |
|
| Catchment Area |
589.0 km2(at MHP intake) |
| Average Flow |
32.66 m3/s (minimum monthly flow 7.22 m3/s) |
| Design Flow |
23.43 m3/s (40% exceedence flow) |
| 90% Exceedence flow |
7.48 m3/s |
| Design Flood (Q100) at MHP headworks |
2070 m3/s |
| Name of River |
Mai Khola |
| Note: The hydrology of MCHP is same as MHP |
| Intake canal (Headworks) |
|
| Type of Structure |
RCC rectangular canal |
| Water level |
|
| Maximum
|
199.0 m (amsl) |
| Minimum
|
198.15 m (amsl) |
| Design Discharge |
23.43 m3/s |
| Length |
89.73 m |
| |
|
| Headrace Canal/Culvert |
|
| Total Length
|
3719.66 m |
| Size
|
Rectangular: Height = (3.0 + 0.5) m, Width = 3.5 m, Trapezoidal: Bottom width = 2.5 m, Top width = 6.9 m, Height = (2.15+1.0) m
|
| Bed slope
|
1:1000(V:H) |
| HR culvert (Trapezoidal)
|
L= 1851.66m |
| HR culvert (Rectangular)
|
L= 1798.0m |
| HR Transition panels
|
L=70.0m( 7 nos ,10m each) |
| Kholsi Crossing System |
|
| Kholsi Crossings (With rectangular culvert)
|
|
| Crossing No-01 (Sarangi Kholsi)
|
Span :17.00 m |
| Crossing No-02 (Bhimsen Kholsi)
|
Span: 42.60 m |
| Crossing No-03 (Tarbare Kholsi)
|
Span:7.60 m |
| Crossing No-04 (Ilame Kholsi)
|
Span: 29.00 m |
| Crossing No-05 (Aaptari Kholsi)
|
Span: 30.80 m |
| Kholsi Crossings (With Trapezoidal canal
|
|
| Crossing No-01 (MCHP IV Kholsi)
|
Span: 5.63 m |
| Crossing No-02 ( Bhotange Kholsi)
|
Span : 4.37 m |
| Crossing No-03 (Basnet Kholsi)
|
Span :13.60 m |
| Kholsi Crossings (with Hume pipe arrangement)
|
|
| Crossing No-01 ( Guhe-I Kholsi)
|
17.5 m x 1.20m Dia ; 2 Nos |
| Crossing No-02 (Tukre Kholsi)
|
15.0 m x 1.20m Dia ; 2 Nos |
| Crossing No-03(Bhotange Diversion Kholsi)
|
20.0 m x 1.20m Dia |
| Crossing No-04 (Guhe-II Kholsi)
|
22.50 m x 0 .90m Dia |
| Crossing No-05 (At CH.2+510)
|
22.50 m x 0.90m Dia |
| Crossing No-06 ( At CH.2+870)
|
15.0 m x 1.20m Dia |
| Crossing -07 ( At CH.3+072)
|
15.0 m x 0.90m Dia |
| Crossing -08 ( At CH.3+143)
|
20.0 m x 0.90m Dia |
| Crossing -09 ( At CH.3+450)
|
17.50 m x 0.90m Dia |
| Crossing -10 ( At CH.3+510)
|
22.50 m x 0.60m Dia |
| Forebay: |
|
| Size of Forebay(Avg.)
|
LxBxH = 60.15 m x 9.30 m x 6.44 m |
| Forebay Normal water level
|
194.544 m (amsl) |
| Spillway: |
|
| Muse Khola Spillway:
|
|
| Size of Spillway(Internal)
|
LxBxH = 25.34 m x 8.0 m x 4.4m |
| Normal Water Level at U/S
|
197.36 m (amsl) |
| Normal Water Level at D/S
|
195.46 m (amsl) |
| Bhimsen Kholsi Spillway :
|
|
| Size of Spillway(Internal)
|
LxBxH = 167.80 m x 10.0 m x 2.5 m |
| Types of Spillway
|
RCC rectangular open |
| Exit point
|
Lodhiya Khola |
| Forebay Spillway & Spillway Canal :
|
|
| Spillway
|
|
| Types of Spillway
|
RCC rectangular open |
| Spillway size(Internal)
|
180 m x 10.0 m x 2.5 m |
| Spillway canal
|
|
| Spillway Canal length
|
122.24 m |
| Bottom width
|
3.00 m |
| Top width
|
9.30 m |
| Height
|
3.15 m |
| Exit Point
|
Ch. 0+084 of tailrace canal |
| Penstock: |
|
| Number
|
3 |
| Diameter/Thickness
|
1.5 m /10-14 mm thick |
| Length(Total)
|
218.50 m |
| Size of Gate on Penstock in Forebay
|
BxH = 2.42 m x 2.41 m |
| Powerhouse |
|
| Type
|
Surface |
| Powerhouse size
|
|
| Length
|
46.0 m |
| Width
|
16.62 m |
| Height
|
21.7 m |
| P/H Floor Level
|
158.30 |
| Tailrace |
|
| Type-I
|
RCC , Rectangular canal |
| Size
|
|
| Length
|
83.44 m |
| Width
|
4.60 m |
| Height
|
5.05 m |
| Normal tail water level
|
EL. 155.25m |
| Type-II
|
Gabion mattress lined, trapezoidal canal |
| Size
|
|
| Length
|
128.52 m |
| Top width
|
12.30 m |
| Bottom width
|
6.0 m |
| Height
|
3.15 m |
| Turbine |
|
| Type
|
Francis (Horizontal axis) |
| Number
|
3 |
| Rated output capacityEfficiency
|
2450 KW
92.50% |
| Governor |
|
| Type
|
Electronic with PID control |
| Adjustment for speed drop
|
Between 0 to 5% |
| Generator |
|
| Type
|
Synchronous 3 phases |
| Rated output capacity per unit
|
2917KVA |
| No of units
|
Three(3) |
| Power Factor
|
0.8 |
| Voltage
|
6.3kV |
| Excitation system
|
Brushless |
| Efficiency
|
96.50% |
| Switchyard |
|
| Voltage level
|
33 kV |
| No. of bays
|
1 |
| Transformer |
|
| At Powerhouse
|
|
| Type
|
Three Phase |
| Rated Capacity
|
9000KVA |
| Voltage Ratio
|
33/6.3 kV |
| Efficiency
|
99.0% |
| At MHP Switchyard |
|
| Type
|
3-phase, two windings, oil immersed transformer with off load tap-changer |
| Rated Capacity
|
9000KVA |
| Voltage Ratio
|
132/33 kV |
| Efficiency
|
99.0% |
| Transmission Line |
|
| Transmission line length
|
4 km |
| Voltage level
|
33 KV, single circuit |
| Conductor Type
|
ACSR ”DOG” |
| From
|
Powerhouse |
| To
|
Switchyard of Mai Hydropower Project |
| Power and energy |
|
| Installation capacity
|
7000 (3 x 2333.3) kW |
| Dry energy(annual average estimated)
|
6.322 GWh |
| Wet energy(annual average estimate)
|
32.099 GWh |
| Net Energy Output(annual average estimated)
|
38.422 GWh |
| Project Cost at completion |
1,377 MNPR |
