Dam Safety Act 2021 — UPSC Notes (GS III)

India has the world's third-largest stock of large dams — around 5,700 completed and another 400+ under construction as of the latest National Register of Large Dams. For decades, dam safety was governed by state rules of uneven rigour. The Dam Safety Act, 2021 — enacted after nearly two decades of drafting — creates India's first unified dam safety framework, with statutory national and state-level institutions. For UPSC GS-III, the Act is a case study in federal-environmental legislation and disaster risk reduction.

Why the Act was needed

• India has around 5,700 large dams (height >15 m, or 10-15 m with specific conditions).
• Roughly 75% are more than 25 years old; many are beyond their original design life.
• Dam failures in India (Machhu 1979, Tiware 2019) caused massive casualties.
• Most dams are under state ownership; uniform safety norms did not exist.
• Mullaperiyar — an aging dam in Kerala but operated by Tamil Nadu — symbolised the inter-state governance gap.
• The Central Water Commission (CWC) had non-binding dam safety guidelines since 1987.

Key features of the Dam Safety Act, 2021

Scope — "specified dam"

The Act applies to "specified dams":

• Height >15 m, OR
• Height 10-15 m subject to certain design and structural conditions (reservoir capacity, foundation, hazard class).

Four-tier institutional architecture

Obligations of dam owners

• Primary responsibility for safe construction, operation, maintenance, supervision.
• Dam Safety Unit at each dam.
• Pre-monsoon and post-monsoon inspections.
• Inspection during and after any earthquake, flood, calamity, or sign of distress.
• Preparation of an Emergency Action Plan.
• Comprehensive dam safety reviews periodically.

Inter-state dams

• The NDSA acts as SDSO for inter-state dams — for example, Mullaperiyar (Kerala dam, TN operator).
• Resolves inter-state disputes on dam safety.

Offences and penalties

• Obstructing an officer: up to 1 year imprisonment.
• Non-compliance resulting in loss of life: up to 2 years imprisonment.
• Fines in addition to imprisonment.

Merits of the Act

1. Institutionalisation of dam safety

For the first time, dam safety has a statutory national regulator.

2. Uniform operations

Earlier, some dams were managed by states, others by autonomous bodies (Damodar Valley Corporation, Bhakra Beas Management Board). The Act harmonises the framework.

3. Increased safety margins

Regular inspections, documentation of distress, and emergency action plans reduce the chances of catastrophic failure.

4. Resolution of inter-state disputes

The NDSA directly oversees inter-state dams — reducing litigation and political friction.

5. Accountability

Dam owner is unambiguously responsible for safety; penal provisions provide deterrence.

Criticisms

1. Parliamentary competence

Water is a State subject (List II Entry 17); only inter-state rivers and river valleys (Union List Entry 56) fall clearly within Parliament's competence. Some states argued the Act overreaches onto intra-state dams.

The Centre justifies the Act under Entry 56 of List I (regulation and development of inter-state rivers and river valleys) and Article 252 (two or more states can authorise Parliament to legislate on State List subjects).

2. Vague definitions

Terms like "specified dam" and "sign of distress" were criticised as broad enough that nearly every dam falls within Act coverage.

3. Notification-based flexibility

Core functions of authorities can be changed by notification — without parliamentary amendment. Critics argue this dilutes legislative oversight.

4. State capacity gap

Many states lack the technical manpower to run an SDSO; adequate staffing and funding remain issues.

5. Cost implications

Upgrading old dams and staffing regulators impose fiscal burden on states, while NDSA is Centre-funded.

Institutional and legal context

Related institutions and laws

Dam Rehabilitation and Improvement Project (DRIP)

• DRIP-I (2012-2021) — rehabilitated ~200 dams across 7 states; World Bank funded.
• DRIP-II and III (2021-2031) — ₹10,211 crore; ~700 dams across 19 states and 3 central agencies; financed by World Bank and AIIB.

DRIP complements the Dam Safety Act by actually improving dam infrastructure.

Recent dam safety concerns

Updated context: cross-check specific incidents.

• Tiware dam breach (Maharashtra, 2019) — killed at least 20.
• Sikkim GLOF (October 2023) — destroyed Teesta-III hydropower dam; prompted review of Himalayan dam safety.
• Aging dams in Himalayan states face climate-amplified risks (GLOFs, extreme rainfall).
• Mullaperiyar dispute continues; NDSA-led processes gradually formalising monitoring.
• Bhakra, Hirakud turning 60+ years; comprehensive reviews under DRIP-II.

Climate change and dam safety

• Extreme rainfall events increase flood risk over design spillway capacity.
• GLOFs threaten Himalayan hydro dams.
• Sediment load reducing reservoir capacity.
• Droughts vs cloudbursts — unpredictable hydrology stresses operating rules.

Best practices

• Pre-monsoon readiness drills.
• Real-time dam instrumentation — piezometers, strain gauges, satellite monitoring.
• Third-party safety reviews every 10 years.
• Emergency Action Plans (EAPs) with downstream community coordination.
• Public disclosure of dam safety status.

Latest developments (2024-26)

Updated context: verify details with CWC/NDSA releases.

• NDSA formally operational (2023); SDSOs being notified across states.
• DRIP-II rolled out; ongoing rehabilitation of priority dams.
• Sikkim GLOF aftermath — comprehensive review of Himalayan hydropower EAPs.
• Climate-resilient dam design guidance under preparation.
• COP29 CDRI initiatives — infrastructure resilience for critical water assets.
• Maharashtra dam-review audit post-Marathwada floods 2023.

UPSC relevance

GS-III mapping

• Disaster and disaster management.
• Conservation and environment.

Prelims bullets

• Dam Safety Act — 2021 (notified 2022).
• NDSA — national regulator.
• SDSO — state-level operational body.
• Mullaperiyar — inter-state dam example.
• DRIP — dam rehabilitation project under CWC.
• NCDS is policy-making; NDSA is implementing.

Mains angles

• "Discuss the salient features and federal concerns of the Dam Safety Act, 2021."
• "India's aging dam infrastructure represents a major disaster risk. Evaluate the legal and institutional response."
• “How does climate change affect dam safety in India? Suggest measures.”

Essay hooks

• Legacy infrastructure in a climate-changed future.
• Federalism and environmental regulation.
• Dam safety as disaster risk reduction.

Quick revision

Bottom line for UPSC: the Dam Safety Act, 2021 is a long-overdue institutional upgrade that centralises oversight while leaving operation to states — but its federal legitimacy, state-level capacity, and climate responsiveness remain works in progress. For answers, pair it with DRIP, Mullaperiyar, and Sikkim GLOF to show depth.