Time and Cost Overruns in Hydro Projects in India: Consumer Impact, and the Way Forward
Hydropower plays a critical role in India’s energy mix, offering renewable, peaking, and grid-stabilizing power. However, despite its potential, hydroelectric projects in India have long been plagued by time and cost overruns. These issues not only derail the financial viability of such projects but also increase the burden on electricity consumers. Understanding the causes, assessing the economic impact, and exploring viable solutions is vital for reforming this essential sector.
At end of third plan 31.03 1966 total installed power capacity was 9027 MW comprising Coal Lignite 4417 MW, Gas 134 MW,Diesel 352 MW, and Hydro 4124 MW. As on 31.06.2025 installed capacity stood at Coal and Lignite 221318 MW, Gas 20132.42 MW, Diesel 589.2 MW, Nucler 8780 MW,Hydro 49378.16 MW, RES(MNRE) 184621.04 MW totalling 484818.82 MW. Hydro share has reduced from 45% in 1966 to 10.18% as of today.
Toal exploitable large hydro power potential of India is 133410 MW as per reassessment carried out by CEA and further 176280 MW for identified pump storage potential. That is hardly 33.26% of hydro power potential excluding PSP and 15.94% including PSP has been exploited so far.
The reasons for this skewed development in power mix is due to the fact that hydro power project construction is more complex than thermal or other RE sources. But it is less polluting and beats inflationary trends to a large extent during its life cycle. Although Govt. has made many policy interventions from time to time, still capacity addition is dismal.
The Scale of Time and Cost Overruns in India
Hydro projects in India routinely exceed planned schedules and budgets. More than 80% of hydro projects under construction have faced time and/or cost overruns. On average, project delays range from 3 to 7 year. Cost escalations often exceed 50–100% of the original estimates.
Key Reasons Include:
1. Land acquisition delays and rehabilitation & resettlement (R&R) issues.
2. Environmental clearances that are complex and time-consuming.
3. Geological surprises in difficult Himalayan terrain.
4. Inadequate project planning and outdated survey techniques.
5. Contractual disputes and inefficient project management.
6. Law and order problems in remote regions.
These systemic issues lead to both direct capital cost increases and indirect costs such as interest during construction (IDC) and Expenditure during construction (EDC).
Impact on Consumers
When hydro projects suffer delays and overspend, consumers ultimately bear the financial burden:
1. Higher electricity tariffs due to increased capital cost recovery.
2. Fixed cost burdens on Discoms even if project commissioning is delayed.
3. Opportunity cost due to delays in clean energy addition, resulting in continued reliance on expensive and polluting alternatives.
4. Cost Plus Tariff Model used in India allows developers to pass on cost escalations to end-users, incentivizing inefficiency.
IV. The Way Forward: Resolution and Reform
To resolve the problem, a multi-pronged strategy is necessary. In addition to various measures suggested by Ministry of power and CEA from time o time expedite hydro project execution and mitigate the impact of time and cost over run the followings can be considered.
Fix responsibility and penalise delay.
A tripartite agreement should be entered into by three key players who are interested and responsible parties in project development i.e the project developer responsible for project execution and entitled for RoE, State Govt where project is located who is entitled for 12% free power as royalty other than 1% for local area development and water and environment cess if applicable and is responsible for land acquisition and various clearances and law and order, Central Govt who is entitled for direct taxes and indirect taxes from the project and responsible for giving environment clearance and other approvals by central agencies like CEA and CWC etc.
If any delay occurs due to delay by project developers then some deduction from RoE should be made at the time of tariff fixation, if delay is attributable to state govt, reduction from free power should be made and for delay attributable to central agencies central govt should be mandated to give tax concession. This will shift the burden of delay from consumers.
Alternatively Shift from Cost-Plus to Competitive Tariff Discovery
Open market-based tariff bidding for hydro (as is done for solar/wind) can incentivize cost discipline. Viability gap funding or incentives may be provided for long-gestation projects but pricing should be transparent and market-discovered.
Conclusion
Hydro power is a critical asset in India’s transition to a low-carbon economy. However, systemic issues related to time and cost overruns threaten its viability and increase the burden on end consumers. Learning from global best practices and adopting market-based mechanisms with strong regulatory oversight can create a robust, efficient, and consumer-friendly hydro sector in India.
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