Klamath River Dams Fully Removed

Polavaram Irrigation Project Targets 2027 Completion

Polavaram, Andhra Pradesh, India

Starts 12/31/2027ESTIMATED 66% CONFIDENCEin 1.3 yearsDecember 2027 is the official scheduled completion date (Deccan Chronicle^[3], 8 December 2025), with the agencies pushing to finish before the Godavari Pushkaralu in July 2027. Wikipedia's^[2] infobox instead expects July 2029. The pin keeps the official 2027 target its title is about, dated to the last day of that year, but as an estimate that later sources may not bear out.

India's Polavaram multi-purpose dam on the Godavari river, one of the country's largest irrigation and hydropower projects, is racing toward completion under a Rs 12,157 crore central funding boost.

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Gross Dam Raise Tops Out at 470 Feet

Gross Reservoir, Boulder County, Colorado, United StatesDenver Water

Starts 06/03/2026CONFIRMED 86% CONFIDENCE112 days agoHappened as dated, per the source^[1]: "workers placed the final load of roller-compacted concrete on the top of the dam, bringing Gross Dam to a height of 470 feet."

Denver Water finished raising Colorado's Gross Dam by 131 feet, topping out the concrete work that will nearly triple the reservoir's storage capacity.

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European Bank for Reconstruction and DevelopmentMailuu-Suu, Jalal-Abad Region, Kyrgyzstan

EBRD-backed remediation of Kyrgyzstan's Mailuu-Suu tailings dam

Starts 12/31/2030SCHEDULED 75% CONFIDENCEin 4.3 yearsGiven as scheduled, per the source^[1]: the remediation works agreement covers "seven years of remediation works" with a "contract scheduled completion date" of 31/12/2030.

A €23M EBRD-backed grant funds a seven-year project to relocate radioactive uranium tailings from Mailuu-Suu's most dangerous dam, away from the Fergana Valley's water supply.

€23M

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JAVYSBohunice Nuclear Power Plant, Jaslovské Bohunice, Slovakia

Bohunice V1 Nuclear Reactors Fully Dismantled

Starts 07/29/2022CONFIRMED 90% CONFIDENCE4.2 years agoHappened as dated, per the source^[1]: "The two VVER-440 V-230 reactors in Slovakia were decommissioned and disassembled on site".

Slovakia finished fully dismantling the Soviet-era V1 reactors at Bohunice in July 2022, one of the few nuclear plants taken apart down to the reactor vessels.

$1.3B

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United States Bureau of Reclamation

Hoover Dam Dedicated by President Roosevelt

Hoover Dam, Nevada-Arizona border, USA

Hoover Dam Dedicated by President Roosevelt

Starts 09/30/1935CONFIRMED 85% CONFIDENCE91.0 years agoHappened as dated, per the source^[1]: "President Franklin D. Roosevelt dedicates dam September 30th."

President Franklin D. Roosevelt dedicated the Hoover Dam on the Colorado River, then the largest concrete structure ever built.

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Hidroituango Dam Crisis Forces Mass Evacuation in Colombia

EPMItuango, Antioquia, Colombia

Starts 05/12/2018CONFIRMED 81% CONFIDENCE8.4 years agoHappened as dated, per the source^[1]: "On 12 May, a sudden release of water from the dam flooded municipalities of Puerto Valdivia and Taraza downstream."

A blocked diversion tunnel at Colombia's roughly $4 billion Hidroituango hydroelectric project triggered flooding and landslides that forced thousands of people downstream to evacuate.

$4B

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Роғун ГЭС, Ноҳияи Роғун, Тоҷикистон

Rogun Dam Targets Completion as World's Tallest

Starts 12/31/2029ESTIMATED 61% CONFIDENCEin 3.3 yearsGiven as scheduled, per the source^[1]: "the dam registered a significant advancement of works, with a rise of as much as 100 metres" during the past year, with full completion still targeted for 2029.

Tajikistan's Rogun Dam, a Soviet-era project restarted after independence, is targeted to reach full completion around 2029 as the world's tallest dam at roughly 335 metres.

$6.3B

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Panama Canal Wins Approval for Rio Indio Reservoir

Río Indio, Capira, Panamá Oeste, PanamaPanama Canal Authority

Starts 06/30/2024CONFIRMED 89% CONFIDENCE2.2 years agoHappened as dated, per the source^[1]: "In 2024, a Supreme Court ruling overturned a law that had blocked the creation of the Indio River reservoir."

Panama's Supreme Court overturned a 2006 law blocking new reservoirs, clearing the way for a dam on the Rio Indio meant to secure the Panama Canal's water supply against worsening droughts.

$1.6B

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Infrastructure09/14/2026@ThePinGang

Queensland Reverses Course, Commits to Rebuilding Paradise Dam Wall in Place

Paradise Dam, Burnett River, Queensland, AustraliaSunwater

Starts 07/07/2026CONFIRMED 85% CONFIDENCE78 days agoHappened as dated, per the source^[1]: "I don't accept the nonsensical argument that was being put up, which is an inferior, smaller wall downstream".

Queensland abandoned its plan for a new downstream dam in July 2026 and committed instead to rebuilding Paradise Dam's existing wall back to its original height.

A$60M

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Lesotho Delivers Its First Water to South Africa

Katse Dam, Lesotho

Lesotho Highlands Development Authority

Lesotho Delivers Its First Water to South Africa

Starts 01/22/1998CONFIRMED 80% CONFIDENCE28.7 years agoWikipedia^[2] gives an exact date: "Water delivery officially began on 22 January 1998," after the Katse Dam was completed in 1996 and its reservoir filled by 1997.

Water begins flowing from the newly completed Katse Dam through the Lesotho Highlands Water Project to Johannesburg, the first payment on a 1986 treaty that turns Lesotho’s rainfall into its biggest export.

ZAR 9.3B

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Architecture09/14/2026@BuildDesk

Salt Lake Temple Completes Seismic Base-Isolation Retrofit

Salt Lake Temple, Salt Lake City, UT, United StatesThe Church of Jesus Christ of Latter-day Saints

Starts 06/30/2026CONFIRMED 88% CONFIDENCE85 days agoHappened as dated, per the source^[1]: "Starting Thursday, June 25, construction crews removed over 1,500 bolts connecting 392 plates to the base isolators."

Crews finished installing a base-isolation system beneath the 19th-century Salt Lake Temple as part of an estimated $2.4 billion project to let the building float free of the ground during a major earthquake.

$2.4B

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Kraftwerke OberhasliSpitallamm Dam, Grimsel Pass, Bern, Switzerland

New Spitallamm Dam Replaces Century-Old Cracked Wall

Swiss utility KWO finished building a new 113-metre arch dam directly in front of its cracked 1932 predecessor high in the Grimsel Pass.

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Polavaram Irrigation Project Targets 2027 Completion

Polavaram, Andhra Pradesh, India

India's Polavaram multi-purpose dam on the Godavari river, one of the country's largest irrigation and hydropower projects, is racing toward completion under a Rs 12,157 crore central funding boost.

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Gross Dam Raise Tops Out at 470 Feet

Gross Reservoir, Boulder County, Colorado, United StatesDenver Water

Denver Water finished raising Colorado's Gross Dam by 131 feet, topping out the concrete work that will nearly triple the reservoir's storage capacity.

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European Bank for Reconstruction and DevelopmentMailuu-Suu, Jalal-Abad Region, Kyrgyzstan

EBRD-backed remediation of Kyrgyzstan's Mailuu-Suu tailings dam

A €23M EBRD-backed grant funds a seven-year project to relocate radioactive uranium tailings from Mailuu-Suu's most dangerous dam, away from the Fergana Valley's water supply.

€23M

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JAVYSBohunice Nuclear Power Plant, Jaslovské Bohunice, Slovakia

Bohunice V1 Nuclear Reactors Fully Dismantled

Starts 07/29/2022CONFIRMED 90% CONFIDENCE4.2 years agoHappened as dated, per the source^[1]: "The two VVER-440 V-230 reactors in Slovakia were decommissioned and disassembled on site".

Slovakia finished fully dismantling the Soviet-era V1 reactors at Bohunice in July 2022, one of the few nuclear plants taken apart down to the reactor vessels.

$1.3B

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United States Bureau of Reclamation

Hoover Dam Dedicated by President Roosevelt

Hoover Dam, Nevada-Arizona border, USA

Starts 09/30/1935CONFIRMED 85% CONFIDENCE91.0 years agoHappened as dated, per the source^[1]: "President Franklin D. Roosevelt dedicates dam September 30th."

President Franklin D. Roosevelt dedicated the Hoover Dam on the Colorado River, then the largest concrete structure ever built.

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Hidroituango Dam Crisis Forces Mass Evacuation in Colombia

EPMItuango, Antioquia, Colombia

A blocked diversion tunnel at Colombia's roughly $4 billion Hidroituango hydroelectric project triggered flooding and landslides that forced thousands of people downstream to evacuate.

$4B

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Роғун ГЭС, Ноҳияи Роғун, Тоҷикистон

Rogun Dam Targets Completion as World's Tallest

Tajikistan's Rogun Dam, a Soviet-era project restarted after independence, is targeted to reach full completion around 2029 as the world's tallest dam at roughly 335 metres.

$6.3B

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Panama Canal Wins Approval for Rio Indio Reservoir

Río Indio, Capira, Panamá Oeste, PanamaPanama Canal Authority

Panama's Supreme Court overturned a 2006 law blocking new reservoirs, clearing the way for a dam on the Rio Indio meant to secure the Panama Canal's water supply against worsening droughts.

$1.6B

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