Super Mai A Hydropower Project
Super Mai A Hydropower Project in situated in Illam District, Mechi Zone of Eastern Development Region of Nepal. It is 550 km away from Kathmandu by road. The project utilizes water from the Kumbhakarna Range, which form the Mai river. The headwork is situated at Sulbung VDC, Illam. The powerhouse is located at Gangate Faat, Sumbek VDC, Illam. It is a run-of-river type of project with an installed capacity of 9.9 MW.
Salient Features
| Power Development | |
|---|---|
| Type of Power Generation | Run-Off-River |
| Total Gross Head | 199.3 m |
| Rated Net Head | 186.025 m |
| Installed Capacity | 9.99 MW |
| Average Annual Energy | |
| Total Energy | 59.64 GWh |
| Dry Energy | 10.12 GWh |
| Wet Energy | 49.52 GWh |
| Hydro and Meteorology | |
| Catchment Area at Intake | 129 km2 |
| Weir and Undersluice | |
| Type of Weir | Broad crest type concrete gravity Dam |
| Crest Length of Weir | 25.5 m |
| Intake | |
| Type | Orifice side intake |
| Gravel Trap | |
| Length | 9.0 m |
| Size(B x D) | (7.6 m X 3.8 m) |
| Approach Canal | |
| Type | Box |
| No. of Canal | 2 |
| Length | 48.5 m |
| Desanding Basin | |
| Type | Concrete , Double bay |
| size of Each Chamber (L x B x H) | (56 x 5.6 x 4.45) |
| Surge tank | |
| Type | Sub-Surface, concrete |
| Powerhouse | |
| Type | Sub-Surface |
| Number of Units | 3 |
| Turbine | |
| Type of Turbine | Francis |
| No. of units | 3 |
| Rated Capacity | 3.5 MW |
| Rated Speed | 1000 rpm |
| Rated Efficiency | 90.00 % |
| Generator | |
| Type | Salient pole, synchronous |
| No. of units | 3 |
| Rated Capacity | 4.0 Mva |
| Rated Efficiency | 96.00 % |
| Transformer | |
| Type | Three Phase, single |
| Rated Capacity | 12 Mva |
| Frequency | 50 Hz |
| Rated Efficiency | 99.00 % |
| Transmission Line | |
| Specification | 132 KV single circuit line to Godak Sub-station |
| Length | Approximate 12 Km |
| Access road | |
| Internal access road | 9.0 Km |
| Environmental Study | |
| Downstream release | 0.206 m3/s |
| Construction Period | 2 Years |