Overview

The Indrawati III Hydropower Station is an operational run-of-river hydroelectric power plant situated in the Sindhupalchok District of Nepal. Developed and owned by the National Hydropower Company Limited, the facility serves as a key independent power producer (IPP) within the Nepalese energy infrastructure. The plant harnesses the natural flow of the Indrawati River, which functions as a tributary of the larger Sunkoshi River, to generate electricity for the national grid.

With an installed capacity of 7.5 MW, the Indrawati III station contributes a steady output of approximately 50 GWh of annual energy. The technical design relies on a gross head of 65 m and a design flow rate of 14 m3/s, optimizing the run-of-river configuration to maximize efficiency without requiring an extensive reservoir. The generated power is transmitted to the national grid and sold directly to the Nepal Electricity Authority, supporting regional energy stability.

Commercial operations commenced on 2059-06-21 BS, marking the beginning of its long-term contribution to Nepal’s hydropower sector. The plant operates under a generation licence that is scheduled to expire on 2104-09-29 BS. Upon the conclusion of this licensing period, ownership of the facility is set to be handed over to the government, ensuring continued public utility of the infrastructure. The National Hydropower Company Limited remains the primary operator throughout this initial phase, managing the technical and commercial aspects of the station’s performance.

Technical Specifications

The Indrawati III Hydropower Station operates as a run-of-river hydroelectric facility, a design choice that leverages the natural flow of the Indrawati River without requiring a large reservoir for storage. This configuration is typical for the hilly terrain of the Sindhupalchok District in Nepal, where the river serves as a tributary to the larger Sunkoshi River system. The plant's engineering parameters are optimized to capture energy from this specific hydrological profile, balancing flow rate and head height to achieve its rated capacity.

Hydrological and Mechanical Parameters

The station is designed to generate 7.5 MW of electricity, contributing to the national grid's stability. According to the project specifications, the plant produces an annual energy output of 50 GWh. This generation capacity is derived from a design flow rate of 14 m³/s. The mechanical efficiency of the plant relies on a design gross head of 65 m, which provides the necessary potential energy conversion for the turbines. These parameters define the operational envelope of the facility, ensuring consistent power delivery to the Nepal Electricity Authority.

Parameter Value Unit
Installed Capacity 7.5 MW
Annual Energy Output 50 GWh
Design Flow Rate 14 m³/s
Design Gross Head 65 m
Plant Type Run-of-river —

The technical design supports the plant's status as an Independent Power Producer (IPP) project. The infrastructure is connected directly to the national grid, allowing for the efficient transmission of the generated electricity. The specified flow and head parameters are critical for maintaining the 7.5 MW output, particularly during peak flow seasons in the Sindhupalchok region. The run-of-river nature means that the 14 m³/s design flow is a key operational metric, as it dictates the turbine's throughput requirements relative to the 65 m vertical drop.

Ownership and Corporate Structure

The Indrawati III Hydropower Station is owned and developed by National Hydropower Company Limited, which operates as an Independent Power Producer (IPP) within the Nepalese energy sector. As the primary owner, National Hydropower Company Limited manages the plant's operational lifecycle, overseeing the conversion of water flow from the Indrawati River into electrical energy. The facility is situated in the Sindhupalchok District of Nepal, leveraging the natural gradient of the river system to generate power. The ownership structure is defined by a specific concession period, with the generation licence set to expire on 2104-09-29 BS. Upon the expiration of this licence, the plant is scheduled to be handed over to the government, marking a transition from private IPP management to public ownership. This handover mechanism is a key feature of the corporate agreement, ensuring long-term public benefit from the infrastructure investment.

Relationship with Nepal Electricity Authority

The electricity generated by the Indrawati III Hydropower Station is sold to the Nepal Electricity Authority, which serves as the primary off-taker for the project. This commercial relationship is central to the plant's financial viability and operational strategy. The power station is physically connected to the national grid, allowing for the efficient transmission of the 7.5 MW of generated capacity to end-users across the region. The Nepal Electricity Authority purchases the annual energy output, which amounts to 50 GWh, integrating this run-of-river hydro-electric source into the broader national supply mix. The design parameters of the plant, including a design flow of 14 m3/s and a design gross head of 65 m, are optimized to meet the contractual delivery requirements set forth in the agreement with the Nepal Electricity Authority. This partnership between the IPP and the national grid operator facilitates the steady flow of renewable energy, supporting grid stability and energy security in Nepal.

The operational status of the plant remains active, having started generating electricity since 2059-06-21 BS. The ongoing collaboration between National Hydropower Company Limited and the Nepal Electricity Authority ensures that the facility continues to contribute to the national energy portfolio. The structured handover plan to the government after the licence period reflects a long-term strategic alignment between private investment and public utility goals. This model allows for private sector efficiency during the initial operational phase, while securing future public control of the asset. The clear definition of roles, with National Hydropower Company Limited managing production and the Nepal Electricity Authority handling distribution and sales, provides a stable framework for the Indrawati III Hydropower Station's continued operation.

Operational Timeline

The Indrawati III Hydropower Station has been operational since its commissioning in 2059 BS, marking the beginning of its contribution to Nepal’s national grid. As a run-of-river facility, the plant utilizes the flow from the Indrawati River, a tributary of the Sunkoshi River, to generate electricity. The station is owned and developed by the National Hydropower Company Limited, which operates as an independent power producer (IPP) in Nepal. The generated electricity is sold to the Nepal Electricity Authority, integrating the plant into the broader energy infrastructure of the country.

Commissioning and Early Operations

The plant started generating electricity on 21 June 2059 BS. This date marks the official commencement of power generation, with the facility delivering its design capacity of 7.5 MW. The operational model follows a typical independent power producer structure, where the National Hydropower Company Limited manages the generation and sells the output to the Nepal Electricity Authority. The plant’s annual energy production is recorded at 50 GWh, based on a design flow of 14 m3/s and a design gross head of 65 m.

Licence Expiration and Handover

The generation licence for the Indrawati III Hydropower Station is set to expire on 29 September 2104 BS. Upon expiration, the plant will be handed over to the government, transitioning from private operation to public ownership. This handover process is a standard feature of many hydropower projects in Nepal, ensuring long-term public benefit from the infrastructure. The timeline of operations is summarized in the table below.

Year (BS) Event
2059 Plant commissioned; electricity generation begins on 21 June 2059 BS.
2104 Generation licence expires on 29 September 2104 BS; plant handed over to the government.

The operational timeline reflects the planned lifecycle of the Indrawati III Hydropower Station, from its initial commissioning to the eventual transfer of ownership. This structure ensures that the plant continues to serve the energy needs of Nepal while aligning with the strategic goals of the National Hydropower Company Limited and the Nepal Electricity Authority.

What is the significance of Indrawati III in Nepal's energy sector?

Indrawati III Hydropower Station serves as a specialized run-of-river facility within Nepal’s broader hydroelectric portfolio, contributing to the stability of the national grid through its consistent output. With an installed capacity of 7.5 MW and an annual energy generation of 50 GWh, the plant represents a modest but reliable source of power in the Sindhupalchok District. Its operational model highlights a key strategy in Nepal’s energy sector: the utilization of independent power producers (IPPs) to accelerate infrastructure development while leveraging existing river systems. The plant draws from the Indrawati River, a tributary of the Sunkoshi River, utilizing a design flow of 14 m3/s and a gross head of 65 m to generate electricity. This technical configuration allows for efficient energy production with minimal environmental disruption compared to large reservoir-based projects.

Role in the National Grid

The electricity generated by Indrawati III is fed directly into the national grid and sold to the Nepal Electricity Authority (NEA). This integration supports the NEA’s ability to meet regional demand, particularly in the Sindhupalchok area and surrounding districts. As an operational asset owned and developed by National Hydropower Company Limited, the station exemplifies the public-private partnership dynamics that characterize Nepal’s hydropower landscape. The plant’s commissioning on 2059-06-21 BS marked the beginning of its contribution to the country’s renewable energy mix, providing a steady stream of power that complements larger hydroelectric projects and thermal plants.

License Expiry and Government Handover

A defining feature of the Indrawati III project is its structured lifecycle management, particularly the handover mechanism to the government. The generation license for the plant is set to expire on 2104-09-29 BS. Upon this date, ownership and operational control will transition from National Hydropower Company Limited to the Nepalese government. This model ensures that the long-term benefits of the infrastructure accrue to the public sector after the initial development and operational phases. The handover process is a critical aspect of Nepal’s hydropower policy, allowing for private investment in construction and early operations while securing public ownership for sustained energy security. This approach balances the need for capital infusion from IPPs with the strategic interest of the state in maintaining control over key energy assets.

Geographical Context

The Indrawati III Hydropower Station is situated within the Sindhupalchok District of Nepal, a region characterized by significant topographical variation that facilitates run-of-river hydroelectric development. The plant’s strategic location allows it to harness the natural flow of the Indrawati River, which serves as a key tributary to the larger Sunkoshi River system in the central Himalayan region. This hydrological connection is fundamental to the station’s operational model, as the facility relies on the continuous discharge from the Indrawati rather than a large reservoir storage system.

Hydrological Parameters

The hydrological design of the Indrawati III station is defined by specific flow and head characteristics that determine its energy output. The plant operates with a design flow rate of 14 m3/s, drawing water directly from the Indrawati River. This volume of water is utilized to generate electricity against a design gross head of 65 m, a vertical drop that provides the necessary potential energy for the turbines. These parameters are typical for medium-scale run-of-river projects in the Nepalese Himalayas, where terrain provides substantial head while river discharge varies with seasonal monsoon patterns.

The combination of a 14 m3/s design flow and a 65 m gross head supports the station’s installed capacity of 7.5 MW. This capacity enables the plant to produce an annual energy output of 50 GWh, contributing to the regional power supply. The run-of-river configuration means that the generation is directly linked to the river's natural discharge, making the 14 m3/s design flow a critical metric for estimating annual performance relative to the 50 GWh target.

The Sindhupalchok District provides the geographical context for this infrastructure, offering the necessary elevation changes and water resources for hydroelectric exploitation. The Indrawati River’s status as a tributary of the Sunkoshi River places the Indrawati III station within a broader hydrological network that has seen multiple development projects in Nepal. The location ensures that the generated power can be effectively transmitted to the national grid, facilitating the sale of electricity to the Nepal Electricity Authority as part of the regional energy mix.

Frequently asked questions

What is the installed capacity of the Indrawati III Hydropower Station?

The Indrawati III Hydropower Station has an installed electrical capacity of 7.5 MW. This run-of-river facility generates an annual energy output of 50 GWh. The plant utilizes a design flow rate of 14 m3/s and operates with a design gross head of 65 m. These technical specifications allow the station to contribute a steady supply of renewable energy to the regional grid.

Who owns and operates the Indrawati III Hydropower Station?

The plant is owned and developed by the National Hydropower Company Limited. This entity operates as an Independent Power Producer (IPP) within Nepal. While the National Hydropower Company Limited manages the operations, the generated electricity is sold to the Nepal Electricity Authority for distribution across the national grid. The ownership structure is part of a concession agreement with the Nepalese government.

Where is the Indrawati III Hydropower Station located?

The facility is situated in the Sindhupalchok District of Nepal. It draws its water supply from the Indrawati River, which serves as a tributary to the larger Sunkoshi River. The run-of-river design leverages the natural flow of the Indrawati River to drive the turbines, minimizing the need for extensive reservoir storage compared to other hydroelectric technologies.

When was the plant commissioned and what is its operational timeline?

The Indrawati III Hydropower Station began generating electricity on 2059-06-21 BS (Bikram Sambat). The plant holds a generation licence that is scheduled to expire on 2104-09-29 BS. Upon the expiration of this licence, the facility is set to be handed over to the government of Nepal. This transition marks the end of the independent power producer's operational period and the beginning of state-owned management.

What is the current operational status of the station?

The Indrawati III Hydropower Station is currently operational. It is actively connected to the national grid, delivering power to the Nepal Electricity Authority. As a run-of-river plant, its generation is dependent on the flow of the Indrawati River, but it remains a functional and active component of Nepal's hydroelectric infrastructure. The plant continues to operate under the licence granted to the National Hydropower Company Limited.

Summary

The Indrawati III Hydropower Station is an operational run-of-river hydroelectric facility situated in the Sindhupalchok District of Nepal. The plant harnesses the flow of the Indrawati River, a tributary of the Sunkoshi River, to generate electricity with an installed capacity of 7.5 MW and an annual energy output of 50 GWh. Owned and developed by the National Hydropower Company Limited, an independent power producer (IPP) in Nepal, the station has been connected to the national grid since its commissioning on 2059-06-21 BS. The generated power is sold to the Nepal Electricity Authority, contributing to the regional energy mix.

Technically, the plant operates with a design flow of 14 m3/s and a design gross head of 65 m. The generation license for the facility is set to expire on 2104-09-29 BS, after which the plant is scheduled to be handed over to the government. This structure reflects common public-private partnership models in Nepal's hydropower sector, where private developers manage operations for a defined period before transferring assets to the state.

The Indrawati III Hydropower Station exemplifies Nepal's ongoing efforts to leverage its riverine resources for sustainable energy production. Located in the Sindhupalchok District, the plant benefits from the natural gradient of the Indrawati River, a key tributary of the Sunkoshi River system. The National Hydropower Company Limited has played a central role in developing this infrastructure, ensuring that the 7.5 MW capacity is effectively integrated into the national grid. The plant's annual generation of 50 GWh underscores its significance in meeting local and regional electricity demands.

As the generation license approaches its expiration in 2104-09-29 BS, the transition plan for the Indrawati III Hydropower Station will likely involve detailed assessments of the plant's operational status and infrastructure condition. The handover to the government aims to ensure continuity in power supply and long-term maintenance of the facility. This process highlights the strategic importance of clear licensing frameworks in Nepal's hydropower sector, balancing private investment with public ownership to maximize energy security.

In summary, the Indrawati III Hydropower Station is a key component of Nepal's hydroelectric infrastructure, providing reliable power generation through its 7.5 MW capacity and 50 GWh annual output. Operated by the National Hydropower Company Limited since 2059-06-21 BS, the plant will be transferred to the government upon the expiration of its license in 2104-09-29 BS. Its location in the Sindhupalchok District and connection to the Sunkoshi River system underscore its strategic role in the country's energy landscape.

See also