Karuwa Seti Hydropower Project is a run-of-river type scheme, located in Kaski District of Gandaki Province in Nepal. The entire project components are located in Machhapuchhre Rural Municipality within Annapurna Conservation Area Project (ACAP). The project has an installed capacity of 32 MW and will generate 167.56 GWh of energy annually. The gross head of the project is 248.45 m while design discharge of the project is 15.3 cumec. The project is located partly in the rocks of Higher Himalayan and partly in Lesser Himalayan zone with major lithology of gneiss, schist and quartzite.
Jade Consult Pvt. Ltd. previously had carried out the detail engineering design and tender documents preparation of the project. Jhyamolongma Hydropower Development Company Pvt. Ltd. is the developer of this project. Jade Consult is currently working on the redesigning of waterways and preparation of construction drawings.
The access to the project area is from Lamachaur of Pokhara, the provincial capital. Blacktopped road of length 19 km up to Kharpani in north from Lamachaur is available. The proposed powerhouse site of the project is only about 1 km upstream from Kharpani.
Originally, this project consists of the tunnel alignment that intersects the Main Central Thrust (MCT). The Consultant had carried out core drilling in the Bhalaudi Khola, the area with the lowest overburden in tunnel to check the rock mass quality underneath that stream. After confirming that the quality of rock is good enough for tunnelling, the Consultant proposed the conventional layout consisting headworks, tunnel, surge tank, surface penstock and then powerhouse at the right bank of the Seti River. However, during the due diligence study, the experts from the bank suggested to place surge tank before the Bhalaudi Khola which would prevent tunnelling in the thrust zone. The Client agreed and the project would then designed to include about 2.5 km long penstock alignment.
The project is under construction.
I was involved in this project during August 2017 – February 2019 during the detail design phase. I was responsible for geological/engineering geological mapping of the project area and access road, planning, execution and supervision of geotechnical survey that consists of 240 m of core drilling, in situ and laboratory tests, rock mass characterization and classification, design of support for surface and underground excavations of project components by empirical and finite element methods using applications like Rocscience RS2 and Unwedge and construction material survey.
I also have intermittent involvement in the underground excavation of the project.