Why in news?
Four Central Industrial Security Force personnel were killed in a shooting at the Sewa-II hydroelectric project's security unit on 29 September 2026. The Hindu reported that a colleague was accused of the firing and was subsequently handed over to the police. The force also indicated that it would examine the incident. Sewa-II is an existing 120-megawatt station in Kathua district, Jammu and Kashmir, near Himachal Pradesh. It is operated by NHPC Limited, formerly the National Hydroelectric Power Corporation Limited. The incident brings attention to the people protecting electricity infrastructure, rather than a new dam approval or generating-unit inauguration. The available report does not establish a motive, damage to the station or an interruption to its electricity supply.
Locating the project through its river
Sewa-II uses the Sewa River, a tributary of the Ravi. NHPC's technical description places the dam near Gatti and the powerhouse at Mashka, within Kathua district. The river descends steeply through this stretch, providing the difference in elevation used for electricity generation. The dam and powerhouse occupy different positions because water is diverted along the conveyance system before reaching the turbines. Their separation is part of the project's engineering.
The nearby settlement of Khairi lies in Chamba district of Himachal Pradesh and provides an approach to the project area. NHPC documents road connections involving bridges across the Ravi and Sewa. This relationship helps explain why accounts of access to the project mention both states. The powerhouse itself is in Jammu and Kashmir. Mashka describes the installation's location, while a route through Himachal Pradesh describes how people and supplies reach it.
How a run-of-river station produces electricity
NHPC describes Sewa-II as a run-of-river scheme with small pondage. A run-of-river arrangement uses river flow and the available drop in elevation, rather than relying primarily on a vast seasonal reservoir. Small pondage provides limited storage within that arrangement. The word does not mean that the project has no dam: Sewa-II includes a concrete dam, a water-conveying tunnel and a separate powerhouse.
Water is directed towards turbines through the project's conveyance system. A turbine converts the water's energy into rotation, and a connected generator converts that rotation into electricity. The United States Department of Energy explains that both water flow and the difference in elevation influence the available energy. That elevation difference is called the head. A steep river reach can therefore be valuable even when the associated storage is relatively limited.
Capacity and generation measure different things
Sewa-II has three generating units rated at 40 megawatts each, giving a total installed capacity of 120 megawatts. Capacity describes the rated rate of electricity production, not the amount actually generated in a year. Annual output also depends on how much water is available and how long the machines operate. A power station does not produce its full rated output continuously merely because that number appears in its project profile.
NHPC's design documents accordingly state annual generation assumptions separately from installed capacity. This distinction is important for understanding all hydropower projects. River conditions and plant availability affect the electricity delivered over time, while the machines' ratings describe their capability under the relevant operating conditions. A run-of-river station is especially connected to the flow reaching it; limited pondage cannot remove that dependence on the river.
Generating power and protecting the installation
NHPC operates the power station. The Central Industrial Security Force, abbreviated as CISF, has a different role: protecting industrial and other critical installations. Its official description includes power plants within that responsibility. Security personnel do not become the operator of a dam or turbine simply because they are deployed at the site. Separating these roles helps explain why a security-unit incident is not automatically an engineering failure.
The September shooting requires investigation into the alleged act and the circumstances within the unit. It also concerns the loss of personnel assigned to protect essential infrastructure. Neither the dam's generating capacity nor its river location supplies an explanation for the violence. The confirmed reporting concerns the deaths, custody of the accused and the force's announced examination. Conclusions about motive or responsibility require evidence from that investigation.
Conclusion
Sewa-II's contribution to electricity generation rests on the Sewa River's flow and the engineering that harnesses its steep descent. The deaths bring attention to another essential part of that installation: the personnel protecting it. Police custody of the accused and the force's announced examination are the immediate responses reported so far. Establishing responsibility and the circumstances of the shooting remains the task of the investigation.