Won't move forward without public': Arunachal CM amid protests over Siang project

The Siang Upper Multipurpose Project, or SUMP, is a proposed large dam and storage project on the Siang river in Arunachal Pradesh. It is being pursued by the Centre through NHPC. The project matters because it could reshape water use, electricity generation, settlements, and the environment across the Siang valley.

Its proposed reservoir would store and manage water, while the dam’s turbines would generate electricity. The article describes it as a multipurpose project, meaning it is intended to serve more than one goal. Water management and strategic objectives would accompany its planned hydropower role.

No construction decision has been taken. The government is currently seeking cooperation to complete a Pre-Feasibility Report. Khandu says the dam will not be imposed and that residents must be consulted if the project is found viable. Local opposition remains strong because of possible submergence, displacement, and environmental damage.

The proposed Siang project would have an installed capacity of 11,200 megawatts. That makes it an enormous planned power project, with effects potentially extending across three districts of Arunachal Pradesh’s Siang valley. Its scale is central to both the government’s ambitions and local fears about the reservoir and its consequences.

The article explicitly describes SUMP as India’s biggest proposed hydropower project. Its planned capacity is therefore presented as larger than other proposed Indian hydropower projects, but the article does not name those projects or provide their capacities. A precise numerical comparison cannot be made from the available information.

The project has not reached construction. Its immediate stage is preparation of a Pre-Feasibility Report, which will examine whether it is viable. The government says any decision to proceed would follow that report and consultation with residents under legal provisions.

A Pre-Feasibility Report, or PFR, is an early assessment of whether a proposed project appears workable. In general, such a report examines a project’s basic technical, financial, environmental, and practical conditions before more detailed planning. The article specifically presents it as the stage that will establish SUMP’s feasibility.

The report matters because the government says it is not yet asking residents to accept construction. It is seeking cooperation only to complete the PFR. The report therefore acts as a gate: if the project is not viable, it should not move to the next stage; if it is viable, further decisions and consultations would follow.

Khandu says the government will consult residents according to legal provisions even if the project is found viable. He also says the project will not move forward without public discussion. The PFR process is continuing amid demands to halt survey activities until local concerns are addressed.

The Centre is pursuing the project through NHPC, and Arunachal Pradesh’s government is seeking cooperation for its Pre-Feasibility Report. Chief Minister Pema Khandu is promoting dialogue rather than immediate construction. The project is presented as serving electricity, water management, and strategic objectives, including India’s response to China’s planned upstream dam.

Opposition comes especially from sections of the indigenous Adi community, including local organisations that have demanded meaningful consultation and a pause in survey work. The Adi Bane Kebang youth wing and the Adi Students’ Union were invited to discussions. Their concerns include submerged villages, displacement, lost ancestral land, damaged livelihoods, and environmental harm.

The government wants the PFR completed and says residents will be consulted before any decision to build. Opposing groups want their concerns addressed and, in some cases, project activities halted. The Arunachal Indigenous Tribes Forum has proposed a peace committee to help both sides communicate.

The concerns arise from what a very large storage reservoir could cover and change. If villages and surrounding land were submerged, residents could be displaced from homes and ancestral territories. The loss would not be only physical. The article describes deep-rooted Adi ties to the Siang river, so relocation could also disrupt community identity and traditional relationships with the landscape.

The proposed dam is planned on the Siang river, and the reservoir could submerge villages. That creates a direct mechanism for displacement and the loss of farmland, homes, cultural places, and livelihood sources. Sections of the Adi community also fear broader environmental damage, while the project’s location in a seismically active region raises safety questions.

These concerns have fuelled sustained opposition and protests. Demonstrations became violent, with an NHPC office and a police station set on fire in Pasighat. The government is seeking dialogue, but local organisations continue to demand meaningful consultation and a halt to surveys until their concerns are addressed.

The project is described as multipurpose because it would combine hydropower generation with water management. Hydropower could add a very large electricity supply, while storage could support management of river water. The article also identifies strategic objectives, making the dam more than a power-generation proposal.

Its strategic importance is linked to the Siang river’s location and China’s plans upstream. The project is being positioned as a counter to China’s mega dam planned upstream. In this framing, India would use a major storage project to strengthen its position around a strategically important river system, while also pursuing domestic electricity and water goals.

The project remains at the PFR stage. The government has not decided to build it, and Khandu says it will not move forward without public discussion. Any future decision would therefore have to address both national strategic arguments and local fears over submergence, displacement, environmental harm, and safety.

A very large dam in a seismically active region faces strong ground movement that can stress its foundation, walls, spillways, and other structures. Earthquakes can also trigger landslides or sudden waves in the reservoir. If safety systems fail, rapidly released water could affect people, infrastructure, farmland, and ecosystems downstream. These are general dam-safety concerns, while the article only notes that SUMP’s location has raised questions.

Assessment normally combines geological and seismic studies, design reviews, reservoir and slope analysis, flood modelling, and emergency planning. Engineers examine possible earthquake sizes, ground conditions, dam strength, spillway capacity, and likely downstream inundation. Authorities also assess warning systems, evacuation routes, monitoring equipment, and inspection plans.

The article does not report the results of such assessments for SUMP. It says the PFR must establish feasibility and that environmental concerns remain under discussion. Before construction, public consultation and detailed safety review would be important because the project could affect a large river valley and downstream communities.