Name: Mailung Khola Hydropower Station
Address: NP

Overview

The Mailung Khola Hydropower Station is an operational run-of-river hydroelectric power plant situated in the Rasuwa District of Nepal. This facility utilizes the natural flow of the Mailung River, which serves as a tributary to the larger Trisuli River system, to generate electrical power. The station has an installed capacity of 5 MW, contributing to the regional energy mix and feeding into the national grid infrastructure. The project represents a specific model of independent power production within Nepal's growing hydropower sector, characterized by its reliance on river flow rather than large-scale reservoir storage.

Ownership and development of the Mailung Khola Hydropower Station are held by Mailun Khola Hydropower Company Pvt. Ltd. This entity operates as an Independent Power Producer (IPP) in Nepal, managing the construction, operation, and maintenance of the facility. The company is responsible for the commercial aspects of the plant, including the sale of generated electricity. The power produced at the station is primarily sold to the Nepal Electricity Authority, which acts as the primary off-taker and distributor of the energy within the national grid network. This arrangement is typical for many IPPs in Nepal, where the government authority plays a central role in power procurement and distribution.

The plant commenced electricity generation on 2071-03-19 BS (Bikram Sambat), marking the start of its operational life. The licensing framework for the facility includes a defined period of private operation. According to the generation license terms, the private ownership and operational rights will expire on 2094-12-30 BS. Upon the expiration of this license, the plant is scheduled to be handed over to the government, transitioning from private IPP management to public ownership. This handover mechanism is a common feature in Nepalese hydropower projects, ensuring that infrastructure assets eventually become part of the national public domain after a period of private investment and operation.

Geography and Hydrology

The Mailung Khola Hydropower Station is situated within the Rasuwa District of Nepal, a region characterized by significant topographical variation and dense forest cover. This geographic positioning is critical to the plant's operational model, as it leverages the natural gradient of the landscape to facilitate energy generation. The facility relies entirely on the flow of the Mailung River, which serves as the primary water source for the hydroelectric infrastructure. The Mailung River functions as a tributary of the larger Trisuli River system, integrating the local hydrological cycle into the broader watershed dynamics of central Nepal. The choice of the Mailung River reflects the strategic selection of water bodies that offer consistent flow rates suitable for run-of-river technology, minimizing the need for extensive reservoir storage while maximizing the utilization of natural water movement.

Hydrological Characteristics and Run-of-River Design

The plant operates as a run-of-river hydro-electric facility, a design choice directly influenced by the hydrological characteristics of the Mailung River. Unlike storage-based hydroelectric plants that rely on large dams to regulate water supply, run-of-river systems generate power using the natural flow and elevation drop of the river. This approach is particularly effective in the Rasuwa District, where the terrain provides sufficient head to drive turbines efficiently. The flow from the Mailung River is channeled to generate 5 MW of electricity, a capacity that aligns with the river's volumetric output and seasonal variations. The run-of-river design minimizes environmental disruption by reducing the surface area of water impoundment, allowing the river to maintain a more natural flow regime downstream. This method of generation is well-suited to the tributary nature of the Mailung River, which feeds into the Trisuli River, ensuring that the water continues its course with minimal alteration to the local ecosystem. The operational status of the plant, which has been active since its commissioning in 2071, demonstrates the reliability of this hydrological setup for consistent power production.

Regional Integration and Water Resource Management

The location in Rasuwa District places the Mailung Khola Hydropower Station within a key energy-producing region of Nepal. The integration of the Mailung River into the national energy grid highlights the importance of tributary systems in the country's hydroelectric portfolio. The Trisuli River, as the main stem receiving the Mailung River's flow, plays a vital role in the regional hydrology, supporting multiple energy projects and water management initiatives. The plant's connection to the national grid ensures that the electricity generated from the Mailung River's flow is efficiently distributed to meet local and national demand. The ownership and development by Mailun Khola Hydropower Company Pvt. Ltd, an independent power producer (IPP) of Nepal, underscores the strategic management of water resources in the district. The generation licence, which is set to expire in 2094-12-30 BS, reflects long-term planning for the utilization of the Mailung River's hydrological potential. After the licence period, the plant is scheduled to be handed over to the government, ensuring continued management of the water resource and energy infrastructure. The sale of electricity to the Nepal Electricity Authority further integrates the local hydrological assets into the national energy framework, highlighting the symbiotic relationship between regional geography and national power supply.

Engineering and Technical Specifications

The Mailung Khola Hydropower Station utilizes a run-of-river hydroelectric design to harness the kinetic energy of the Mailung River. This river is a tributary of the larger Trisuli River, situated within the Rasuwa District of Nepal. The engineering approach relies on the natural flow of the water body to generate electricity, distinguishing it from reservoir-based systems that require significant damming. The plant is designed to extract 5 MW of electrical power from this water source, contributing to the regional energy mix.

Technical Parameters and Grid Integration

The facility is owned and developed by Mailun Khola Hydropower Company Pvt. Ltd., which operates as an Independent Power Producer (IPP) in Nepal. The plant is connected to the national grid, allowing for the efficient distribution of generated electricity. The power produced is sold to the Nepal Electricity Authority, which manages the broader transmission and distribution network. The generation license for the plant is valid until 2094-12-30 BS, after which ownership will be transferred to the government.

Parameter	Detail
Plant Type	Run-of-river hydroelectric
Location	Rasuwa District, Nepal
Water Source	Mailung River (tributary of Trisuli River)
Installed Capacity	5 MW
Operator/Owner	Mailun Khola Hydropower Company Pvt. Ltd.
Grid Connection	National Grid (Nepal Electricity Authority)
License Expiry	2094-12-30 BS

The technical specifications reflect a standard configuration for small-scale hydroelectric projects in the region. The run-of-river design minimizes environmental impact compared to large reservoir dams, as it diverts a portion of the river flow through a penstock to drive turbines before returning the water to the main channel. The 5 MW capacity is suitable for feeding into the local substation and then into the wider Nepal Electricity Authority grid. The plant commenced generation on 2071-03-19 BS, marking the start of its operational phase under the current licensing agreement.

History and Development

The Mailung Khola Hydropower Station was developed as an independent power producer (IPP) project in Nepal. The facility is owned and developed by Mailun Khola Hydropower Company Pvt. Ltd, which spearheaded the construction and operational launch of the run-of-river hydro-electric plant. The project utilizes the flow from the Mailung River, a tributary of the Trisuli River, to generate electricity for the national grid.

Electricity generation at the station commenced on 2071-03-19 BS. This date marks the official start of operations for the 5 MW facility, connecting it to the national grid where power is sold to the Nepal Electricity Authority. The commissioning in 2071 BS established the plant as an operational asset within Nepal's hydroelectric infrastructure, located in the Rasuwa District.

The development model for the Mailung Khola Hydropower Station follows a specific timeline for ownership and operation. The generation licence for the plant is set to expire on 2094-12-30 BS. Upon the expiration of this licence, the plant is scheduled to be handed over to the government, transitioning from private IPP ownership to state control. This handover clause is a key feature of the project's development agreement, defining the long-term operational horizon for Mailun Khola Hydropower Company Pvt. Ltd.

Ownership and Operational Model

The Mailung Khola Hydropower Station is owned and developed by Mailun Khola Hydropower Company Pvt. Ltd., which serves as the primary operator of the facility. This entity operates as an Independent Power Producer (IPP) within the broader energy landscape of Nepal, a status that defines its role in generating electricity for sale to the national grid rather than for self-consumption or direct municipal distribution. The company's development of the plant highlights the strategic importance of private sector participation in Nepal's hydroelectric sector, where IPPs are crucial for expanding installed capacity and diversifying the energy mix beyond state-owned utilities.

Under the operational model established for this facility, the electricity generated by the 5 MW run-of-river plant is sold to the Nepal Electricity Authority (NEA). The NEA acts as the primary off-taker, integrating the power from Mailung Khola into the national grid to meet regional and national demand. This arrangement is typical for many hydroelectric projects in Nepal, where the NEA leverages the output from various independent producers to stabilize supply and manage load across the country's transmission network. The connection to the national grid ensures that the energy produced from the Mailung River, a tributary of the Trisuli River, is efficiently distributed to consumers, contributing to the overall reliability of the power supply in the Rasuwa District and surrounding areas.

The ownership and operational rights of the Mailung Khola Hydropower Station are governed by a specific generation licence with defined temporal boundaries. The plant commenced electricity generation on 2071-03-19 BS (Nepal's Vikram Samvat calendar), marking the beginning of its commercial operation under the Mailun Khola Hydropower Company Pvt. Ltd.. This licence is valid until 2094-12-30 BS, establishing a clear timeframe for the private entity's control over the asset. Upon the expiration of this licence, the plant is scheduled to be handed over to the government of Nepal. This handover mechanism is a common feature in Nepal's hydropower investment framework, designed to balance the need for private capital and expertise during the construction and initial operational phases with long-term public ownership of the energy infrastructure. The transition to government ownership after the licence period ensures that the strategic asset remains under public control, potentially allowing for further integration into state-led energy planning or subsequent private concessions.

What is the significance of the generation licence expiry in 2094 BS?

The generation licence for the Mailung Khola Hydropower Station is scheduled to expire on 2094-12-30 BS. This specific date marks the end of the concession period granted to the independent power producer (IPP), Mailun Khola Hydropower Company Pvt. Ltd. Upon this expiration, the operational control and ownership of the facility are set to be handed over to the government of Nepal. This mechanism is a defining characteristic of the public-private partnership models frequently utilized in Nepal's energy infrastructure development.

Concession Period and IPP Structure

The plant was commissioned on 2071-03-19 BS. The interval between the start of generation in 2071 BS and the licence expiry in 2094 BS represents the primary operational window for the private operator. During this period, Mailun Khola Hydropower Company Pvt. Ltd. retains the rights to manage the run-of-river hydro-electric plant and sell the generated electricity to the Nepal Electricity Authority. The 5 MW capacity of the station is thus commercially exploited by the IPP to recover capital investments and generate returns for shareholders before the state assumes control.

This handover model reduces the immediate capital burden on the national grid operator while leveraging private sector efficiency for construction and initial operation. The confirms that the plant is connected to the national grid, with power sales directed to the Nepal Electricity Authority. The licence terms ensure that after the specified concession period, the asset reverts to public ownership, allowing the government to benefit from the infrastructure without bearing the full initial development risk. The expiry date of 2094-12-30 BS serves as the contractual deadline for this transition.

Why it matters

Mailung Khola Hydropower Station exemplifies the strategic role of independent power producers (IPPs) in expanding Nepal's renewable energy infrastructure, particularly within the Rasuwa District. As a run-of-river facility, the plant leverages the natural flow of the Mailung River, a tributary of the Trisuli River, to generate 5 MW of electricity. This operational model is characteristic of Nepal's hydropower sector, where numerous small-to-medium scale projects are developed to harness the country's abundant water resources without the need for massive reservoirs. The plant's integration into the national grid and its commercial relationship with the Nepal Electricity Authority highlight the collaborative dynamics between private developers and state-owned utilities in delivering power to end consumers.

Contribution to Local and National Energy Mix

Within the Rasuwa District, Mailung Khola provides a localized source of clean energy, contributing to the regional energy security and reducing reliance on imported fossil fuels. The 5 MW capacity, while modest in the context of the national grid, represents a significant addition to the district's energy portfolio. The plant's operation supports the broader goal of diversifying Nepal's energy mix, where hydropower remains the dominant source of electricity generation. By utilizing the Mailung River's flow, the station demonstrates how tributaries of major river systems like the Trisuli can be effectively tapped for power generation, maximizing the geographical spread of hydroelectric assets across the Himalayan terrain.

Operational Framework and Future Transition

The development and operation of Mailung Khola by Mailun Khola Hydropower Company Pvt. Ltd. illustrate the typical lifecycle of IPPs in Nepal. The plant commenced generation on 2071-03-19 BS, marking the beginning of its contribution to the national supply. The current generation licence is set to expire on 2094-12-30 BS, after which the facility will be handed over to the government. This transition model is a common feature in Nepal's hydropower policy, designed to attract private investment for development and maintenance, with the eventual benefit of long-term public ownership. This structure ensures that the infrastructure remains a national asset, providing sustained energy security for the Rasuwa District and the wider Nepal Electricity Authority network well into the future.

Mailung Khola Hydropower Station