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Rogun Dam Reaches Full Height
ESTIMATED61% CONFIDENCEin 2.9 yearsGiven as a target, not a fixed date, per the pin description: "…would be the tallest dam in the world. Estimated date.…"At a planned 335 metres, Tajikistan's Rogun would be the tallest dam in the world. Estimated date.$3.9B0.68Rogun Dam Targets Completion as World's Tallest
ESTIMATED61% 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.$6.3B0.67New Spitallamm Dam Replaces Century-Old Cracked Wall
ESTIMATED65% CONFIDENCE266 days agoSources place the new dam's completion in 2025 - some reporting it already in operation by autumn 2025 - with the powerplant's full restart following in 2026; no single confirmed completion date was found.[1]Swiss utility KWO finished building a new 113-metre arch dam directly in front of its cracked 1932 predecessor high in the Grimsel Pass.0.67Polavaram Irrigation Project Targets 2027 Completion
Polavaram, Andhra Pradesh, India
ESTIMATED66% 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.0.65Grand Ethiopian Renaissance Dam Inaugurated
CONFIRMED86% CONFIDENCE1.0 years agoHappened as dated, per the source[1]: "Ethiopia made history today with the inauguration of the Grand Ethiopian Renaissance Dam (GERD)".Ethiopia formally inaugurated the Grand Ethiopian Renaissance Dam on the Blue Nile in September 2025, capping over a decade of construction on Africa’s largest hydropower project.0.64Hoover Dam Dedicated by President Roosevelt
CONFIRMED85% 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.0.63Queensland Reverses Course, Commits to Rebuilding Paradise Dam Wall in Place
CONFIRMED85% 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$60M0.63The Fed's rate-setting body said it would raise its benchmark rate to a range between 5% and 5.25%, the highest level since 2007
The increase is the 10th straight interest-rate hike since last March in what has been the most aggressive rate-hiking regime since the 1980s.
0.62Hidroituango Dam Crisis Forces Mass Evacuation in Colombia
CONFIRMED81% 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.$4B0.62Gordie Howe International Bridge Opens
Detroit, Michigan
CONFIRMED93% CONFIDENCE58 days agoStated as firm, per en.wikipedia.org[1]: "…ridge tolls. Construction of the bridge was completed in June 2026, inaugurated on July 24, 2026, an…"A 853-metre cable-stayed span over the Detroit River, the longest in North America, carrying the busiest US-Canada trade corridor. Estimated date.$6.4B0.62Snowy 2.0 Pumped Hydro Online
ESTIMATED51% CONFIDENCEin 3.2 yearsGiven as a target, not a fixed date, per the pin description: "…ant to backstop Australia's renewables. Estimated date.…"A 2,200 MW underground pumped-storage scheme linking two existing reservoirs, meant to backstop Australia's renewables. Estimated date.A$12B0.62Huajiang Canyon Bridge Opens as World's Highest
花江峡谷大桥, 关岭布依族苗族自治县, 安顺市, 贵州省, 中国
CONFIRMED84% CONFIDENCE360 days agoHappened as dated, per the source[1]: "the Huajiang Grand Canyon Bridge opened to traffic on September 28 after more than three years of construction."The Huajiang Canyon Bridge opened to traffic in Guizhou, China, becoming the highest bridge on Earth at 625 metres above the canyon floor.0.61
United States Bureau of Reclamation
