STATUS AND SAFETY OF OLD DAMS

1. At a Glance

• India hosts one of the world's largest dam inventories; ageing infrastructure raises structural risk, downstream hazard, and inter-state coordination concerns.
• Governed by the Dam Safety Act, 2021 with a 4-tier institutional architecture (NCDS, NDSA, SCDS, SDSO). [S1][S2]
• Relevant to GS-III (Disaster Management, Infrastructure) and GS-II (Centre-State, Statutory Bodies).

2. Why in the News

• PIB release by Ministry of Jal Shakti dated 29 Jan 2026 reported that 1,681 specified dams are over 50 years old as per National Register of Specified Dams (NRSD), 2025 compiled by NDSA. [S1]
• Pre-monsoon inspection conducted on ~6,524 dams and post-monsoon on ~6,553 dams under the 2021 Act compliance regime. [S1]

3. Background & Evolution

• 1979 Machhu dam failure (Gujarat) and 2017 dam-safety concerns drove central legislation.
• DRIP-I (2012–2021): World Bank-aided rehabilitation of 223 dams in 7 states at ₹2,567 crore. [S4]
• Dam Safety Act, 2021 notified, in force from 30.12.2021. [S2]
• DRIP-II & III (2021– ): co-financed by World Bank + AIIB, US$250 mn each, covering 19 states. [S3][S4]

4. Core Static Facts

• Parent Ministry: Ministry of Jal Shakti, Department of Water Resources, RD & GR. [S1]
• Nodal technical body: Central Water Commission (CWC); regulator: National Dam Safety Authority (NDSA). [S1][S2]
• Statute: Dam Safety Act, 2021 (came into force 30.12.2021). [S2]
• Institutional tiers: NCDS (policy) → NDSA (Centre regulator) → SCDS (State policy) → SDSO (State implementation). [S2]
• Specified dam threshold: height >15 m, OR 10–15 m with specified design features (per Act).
• NRSD 2025: 1,681 dams >50 years old; hosted on CWC's DHARMA portal. [S1]
• Compliance status: 20 States have constituted SCDS; 16 States have established SDSO. [S2]
• Owner duty: mandatory pre-monsoon & post-monsoon inspection annually. [S1]

5. Multi-Dimensional Analysis

Legal / Constitutional - Water is a State subject (Entry 17, List II); Centre legislated under Entry 56, List I (regulation of inter-state rivers) plus Article 252 implicit consent rationale. [S2] - Act provides for offences and penalties, hazard classification, and Emergency Action Plans. [S2]

Administrative - Primary responsibility for O&M rests with dam owners (states, PSUs like DVC, BBMB). [S1] - Federal friction: Tamil Nadu–Kerala on Mullaperiyar; states initially opposed central encroachment.

Environmental / Disaster - Ageing dams + climate-driven extreme precipitation amplify dam break flood (DBF) risk; hazard classification mandated. [S2] - Sedimentation reduces live storage; many dams nearing design life.

Economic - DRIP-I rehabilitation cost: ₹2,567 cr / 223 dams. [S4] - DRIP-II/III combined external financing: US$500 mn (WB+AIIB). [S3][S4]

Scientific / Technological - Tools: DHARMA (asset database), SDMA, RRSSD, RBSD software for risk-based safety assessment. [S5] - Mandates instrumentation, hydro-met & seismological networks. [S2]

6. Recent Developments (last 12–18 months)

• NRSD 2025 released by NDSA listing 1,681 dams >50 yrs old (PIB, 29 Jan 2026). [S1]
• 11th Meeting of NCDS held in New Delhi (2025). [S6]
• Symposium on "Dam Safety Act, 2021: Towards Integrated Dam Safety Management" inaugurated by Union Min. C R Patil. [S7]
• NDSA workshop on RRSSD & RBSD risk-assessment software. [S5]
• DRIP Phase-II progress reported via PIB (2026). [S8]

7. Prelims Hooks

• 1,681 specified dams >50 years old per NRSD 2025. [S1]
• NRSD compiled by National Dam Safety Authority, not CWC directly. [S1]
• Dam Safety Act notified date: 30 December 2021. [S2]
• Four-tier mechanism: NCDS, NDSA, SCDS, SDSO. [S2]
• Pre-monsoon inspections reported: ~6,524; post-monsoon: ~6,553. [S1]
• DRIP-I rehabilitated 223 dams in 7 states at ₹2,567 cr. [S4]
• DRIP-II co-financed by World Bank + AIIB, $250 mn each, covering 19 states. [S3][S4]
• DRIP-I covered states: Jharkhand (DVC), Karnataka, Kerala, MP, Odisha, Tamil Nadu, Uttarakhand. [S4]
• Dam Safety database portal: DHARMA under CWC. [S1]
• SCDS constituted by 20 States; SDSO by 16 States. [S2]
• Implementing Ministry: Jal Shakti (not MoEFCC, not MoP). [S1]
• Primary safety responsibility: dam owner, not Centre. [S1]

8. Mains Relevance

• GS-III: Disaster Management; Infrastructure (Water Resources).
• GS-II: Statutory bodies; Centre–State relations on water.
• Question stems: 1. "Discuss the institutional architecture under the Dam Safety Act, 2021 and assess its adequacy in addressing the ageing-dam crisis in India." 2. "With 1,681 specified dams over 50 years old, evaluate the role of risk-based asset management and DRIP in averting downstream disasters." 3. "Examine federal frictions in regulating safety of dams on inter-state rivers."

9. Related Topics to Study Next

• Inter-State River Water Disputes Act, 1956 — federal water governance.
• National Water Policy 2012 — overarching framework.
• NDMA & Disaster Management Act, 2005 — DBF emergency response.
• CWC & Brahmaputra Board — technical institutions.
• Mullaperiyar / Mekedatu / Polavaram disputes — case studies.
• Climate change & Himalayan GLOFs (Chamoli 2021) — cascading hazards.
• Hydropower policy 2008 & PMKSY — water infra link.
• DHARMA portal & e-FloodWeb — digital water governance.

10. Common Errors / Trap Areas

• Confusing NDSA (regulator) with NCDS (policy committee) — they are distinct. [S2]
• Attributing dam safety to MoEFCC or MoP; correct ministry is Jal Shakti. [S1]
• DRIP is World Bank + AIIB funded in Phase II — not ADB. [S3]
• "Specified dam" ≠ all dams; height/storage threshold under Act applies.
• O&M responsibility lies with dam owner, not NDSA. [S1]

11. Sources

• [S1] STATUS AND SAFETY OF OLD DAMS — https://www.pib.gov.in/PressReleasePage.aspx?PRID=2220215 — (tier: 1)
• [S2] Uniform Procedures For Dam Safety — https://www.pib.gov.in/PressReleaseIframePage.aspx?PRID=1989133 — (tier: 1)
• [S3] World Bank Approves $250 Million Project for Dam Safety — https://www.worldbank.org/en/news/press-release/2020/12/15/world-bank-approves-usd250-million-project-to-make-existing-dams-safe-and-resilient-across-india — (tier: 2)
• [S4] Government Signs $250 Million Loan for DRIP-II — https://www.pib.gov.in/PressReleaseIframePage.aspx?PRID=1742419 — (tier: 1)
• [S5] NDSA workshop on RRSSD & RBSD — https://www.pib.gov.in/PressReleasePage.aspx?PRID=2266087 — (tier: 1)
• [S6] 11th Meeting of NCDS — https://www.pib.gov.in/PressReleasePage.aspx?PRID=2216524 — (tier: 1)
• [S7] Symposium on Dam Safety Act, 2021 (C R Patil) — https://www.pib.gov.in/PressReleasePage.aspx?PRID=2119911 — (tier: 1)
• [S8] DRIP Phase-II update — https://www.pib.gov.in/PressReleasePage.aspx?PRID=2246889 — (tier: 1)