Introduction

Middle Tamor Hydropower Project (MTHP), is a run-of river (RoR) Project with an installed capacity of 73 MW. The Headworks of the project is located at Phunling Municipality and Phaktanglung Rural Municipality, the Powerhouse is located at Mikwa Khola Rural Municipality at the right bank of the Tamor River in Taplejung district.

The boundary co-ordinates of the project are 870 40’ 01” E to 870 42’ 40” E and 270 23’ 29” N to 270 25’ 19” N. The black topped approach road from the project site is at Bahanande, on the Mechi Highway (233 Km), 5 km south of district headquarters Phungling Bazar. From Phungling, the project Powerhouse (Thumba village) and Head-works (Mitlung village) sites are accessible via a 5 km and 7 km long earthen roads, respectively.

Under the responsibility of Tamor Sanima Energy Pvt. Ltd. (TSE) with close technical consultancy by Sanima Hydro and Engineering Pvt. Ltd. (SHEPL), the study and design of the Middle Tamor Hydropower Project was completed and the Generation License was obtained initially for 54 MW on 05 June 2017subsequently the design was revised and generation license for revised capacity of 73MW obtain on 10 Dec 2018.

Sanima Middle Tamor Hydropower Ltd. (SMTHL) was established as a Special purpose vehicle (SPV) Company for the implementation and operation of Middle Tamor Hydropower Project (MTHP). The generation license of 54 MW was transferred from Tamor Sanima Energy Pvt. Ltd to this SPV on 02 November 2017.

SMTHL has implemented the pre-construction and preparatory works, which comprises various works like construction of access roads, up-gradation of existing roads to be used by the Project, slope protection works, bridge crossing at Thumba, camp facilities, acquisition of required private land as well as leasing of public land, arrangement of construction power line and explosives, arrangement of local construction materials and necessary permission form local authorities. According to the Power Purchase Agreement (PPA) with Nepal Electricity Authority (NEA) the required commercial operation date (RCOD) of the Project is 13 September 2021 (28 Bhadra 2078) for 54 MW and 17 July 2022 for the additional capacity.

Construction Progress

Four different contract packages have been prepared for the implementation of the Project. Out of them, Package 1 has been awarded to Zhejiang First Hydro & Power Construction Group Co., Pvt. Ltd. of Hangzhou, Zhejiang, China for Main Civil Works Construction on 12 April 2018, Package 2 has been awarded to Machhapuchhre Metal and Machinery Works Pvt. Ltd. for Hydro-mechanical Works on 11 July 2019, Package 3 has been awarded to Chongqing Water and Turbine Work Co. Pvt. Ltd., China on 23 December 2019 for Electro-mechanical Works and  Package 4 has been awarded to Cosmic Electrical Engineering Associates Pvt. Ltd., Nepal on 07 June 2020 for Transmission Line Works.

The 17 km earthen access road towards the construction site from junction of Mechi Highway (Bahanande) has been completed and is operational with minimal operation and maintenance. The construction of the camp facilities in the Headworks area (Simle Camp) and Powerhouse area (Lorindin Camp) have been completed with construction of 8 buildings in Simle and 2 buildings in Lorindin Camp. Army Camp and Bunker at Sisne (near Headworks) are already completed and are also in operation along with the Employer’s Camp. The national-grid connected Nepal Electricity Authority (NEA) Substation (S/S) at Phungling (Hiti), Taplejung, has been providing the power necessary for the construction of the Project via a dedicated line from Hiti S/S, which is the nearest power source from the Project area.

The Main Civil Works Contractor has completed almost 98% of concrete works at Undersluice, 97% concrete works at intake and 87% concrete works at U/s floodwall till date. Further, the construction of D/s floodwall and cutoff-wall have been already completed. The Contractor has already started the construction of weir. The Contractor has already excavated almost 64% by length of the tunnel. Out of the 6634 m total length of tunnel network, almost 4250 m has already been excavated. The construction of Settling Basin Bays with much larger cross section (150 m x 13.5 m x 17.5 m) is ongoing.

The Hydro-mechanical Contractor has already completed steel lining at intake, undersluice and bedload sluice. The second stage embedded parts installation is ongoing in bedload sluice and erection of stoplog frame is ongoing in Undersluice. The hydro-mechanical works at intake is almost complete. Similarly, the rolling machine required at workshop has been installed and is already in operation. The rolling of steel plates required for penstock pipe/ approach pipe has already been started.

The Electro-mechanical Contractor has completed 90% of engineering design works. Similarly, the construction of draft tubes is almost completed in China and will be transported to Nepal as soon as International flights will be permitted. The Transmission Line Contractor has already completed Check survey of the proposed Transmission line route and soil investigation works. The Contractor has also completed the tower design works.

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