Salt Lake Temple Completes Seismic Base-Isolation Retrofit

Christ Church Cathedral Reinstatement Targets 2027 Completion

ChristChurch Cathedral, Cathedral Square, Christchurch, New Zealand

Starts 12/31/2027ESTIMATED 57% CONFIDENCEin 1.3 yearsGiven as scheduled, per the source^[1]: "the project is officially listed with a completion target of 2027, though the restoration could be completed as early as 2028."

Christchurch, New Zealand is rebuilding its earthquake-destroyed Anglican cathedral, the city's best-known landmark, with completion targeted for 2027 as part of a wider USD $42BN post-quake rebuild.

$42B

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Citicorp Center's Secret Structural Fix Wraps Up

601 Lexington Avenue, Manhattan, New York, NYCiticorp

Starts 10/31/1978ESTIMATED 69% CONFIDENCE47.9 years agoHappened as dated, per the source^[1]: "Repairs were completed in October 1978."

Engineers quietly finished weeks of overnight welding that fixed a hidden wind-bracing flaw in Manhattan's Citicorp Center, averting a possible collapse.

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Hagia Sophia's Dome Restoration

Hagia Sophia, Istanbul, Turkey

Starts 04/14/2025CONFIRMED 88% CONFIDENCE1.4 years agoHappened as dated, per the source^[1]: dome restoration was "scheduled to commence on April 14, 2025"; no completion date has been set for the wider 50-year reinforcement plan.

Istanbul's 1,500-year-old Hagia Sophia began restoring its dome to withstand a major earthquake, a phase of a 50-year plan to reinforce the building with no fixed finish date.

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NovarkaChernobyl Nuclear Power Plant, Chornobyl Exclusion Zone, Ukraine

Chornobyl NPP Accepts Novarka's New Safe Confinement Into Operation

Starts 11/08/2017CONFIRMED 90% CONFIDENCE8.9 years agoUkraine's Chornobyl NPP states it accepted the New Safe Confinement's Enclosing Perimeter into operation on 8 November 2017 (chnpp.gov.ua^[2]).

Ukraine's Chornobyl Nuclear Power Plant formally accepted the New Safe Confinement's Enclosing Perimeter from builder Novarka, completing the giant arch meant to contain the ruined Reactor 4 for a century. The 36,000-tonne steel structure, the largest movable land-based structure ever built, had been skidded into place over the old sarcophagus in November 2016.

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Transport09/14/2026@BuildDesk

Marina Bay Sands breaks ground on its fourth tower

Marina Bay Sands, 10 Bayfront Avenue, SingaporeLas Vegas Sands…

Starts 07/15/2025CONFIRMED 87% CONFIDENCE1.2 years agoCNN^[2] (16 July 2025) reports the tower 'broke ground on Tuesday' and Mothership^[3] dates the groundbreaking to the evening of 15 July 2025. The previous date of 31 January 2031 was the expected opening, not the groundbreaking the pin's title describes; the development is still due to open in early 2031.

Las Vegas Sands began construction on an $8BN fourth tower and 15,000-seat arena at Marina Bay Sands, designed by original architect Moshe Safdie.

$8B

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Réunion's Nouvelle Route du Littoral Set for Full Completion

Nouvelle Route du Littoral, La Grande Chaloupe, Saint-Denis, La Réunion, France

Starts 06/30/2030ESTIMATED 67% CONFIDENCEin 3.8 yearsThe route has already been delayed for years by court rulings, redesigns and rework, so this remains a target rather than a firm date. Given as scheduled, per the source^[1]: "for a complete opening mid-2030."

The final offshore-viaduct section of Réunion's storm-battered coastal highway replacement, plagued by quarry bans and redesigns, is now due to fully open by mid-2030.

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ExxonMobil Joins Hebron's Topsides to Its Gravity Base Structure at Bull Arm

ExxonMobil…Bull Arm, Newfoundland and Labrador, Canada

12/13/2016 - 12/14/2016CONFIRMED 87% CONFIDENCE9.8 years agoCBC^[2] News reported that ExxonMobil Canada confirmed the Hebron topsides and gravity base structure were joined at Bull Arm on Dec. 13-14, 2016.

ExxonMobil Canada's Hebron project reached a major construction milestone when the platform's topsides were joined to its concrete gravity base structure at the Bull Arm fabrication site in Newfoundland. Italian heavy-lift specialist Fagioli had earlier installed the topsides' largest modules, including a 45,000-tonne utilities process module shipped from South Korea.

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Architecture09/20/2026@BuildDesk

Construction Begins on The Delmore, Surfside Collapse Site

8777 Collins Avenue, Surfside, Florida, United StatesDAMAC International

Starts 02/26/2025CONFIRMED 88% CONFIDENCE1.6 years agoHappened as dated, per the source^[1]: DAMAC International "unveils The Delmore... and commences construction" at the Surfside site.

DAMAC International broke ground on The Delmore, a Zaha Hadid Architects-designed condo tower replacing the collapsed Champlain Towers South, with far fewer, far pricier units than before.

$15M

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Hard Rock Las Vegas Tops Out Its 42-Story Guitar Tower

3400 South Las Vegas Boulevard, Las Vegas, NV

Hard Rock International

Hard Rock Las Vegas Tops Out Its 42-Story Guitar Tower

Starts 05/01/2026CONFIRMED 90% CONFIDENCE145 days agoWikipedia^[1] records that "the final structural beam was installed at the top of the newly-built 42-story guitar-shaped hotel tower on May 1, 2026."

The final structural beam went in at the top of the 660-foot guitar-shaped hotel tower, built on the former site of the Mirage's volcano and holding 675 of the resort's rooms. The $4 billion Hard Rock Las Vegas is a full rebuild of the Mirage, which closed on 17 July 2024, and is expected to open in the fourth quarter of 2027.

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Kraftwerke OberhasliSpitallamm Dam, Grimsel Pass, Bern, Switzerland

New Spitallamm Dam Replaces Century-Old Cracked Wall

Starts 12/31/2025ESTIMATED 65% 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.

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Transport09/15/2026@BuildDesk

Golden Gate Bridge District Approves Final $1BN Seismic Retrofit Phase

Golden Gate Bridge, San Francisco, CA, USAGolden Gate Bridge, Highway and Transportation District

Starts 10/24/2025CONFIRMED 84% CONFIDENCE334 days agoHappened as dated, per the source^[1]: "voted Friday to authorize about $1.01 billion in allocations toward the project."

The district that runs the Golden Gate Bridge signed off on roughly $1 billion in funding for the final stage of a decades-long project to keep the span standing through a major earthquake.

$1B

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Science09/15/2026@BuildDesk

Hyper-Kamiokande Neutrino Observatory Cavern Completed

Kamioka, Hida, Gifu Prefecture, Japan

Crews finished excavating the huge cavern in a Japanese mountain that will house the Hyper-Kamiokande neutrino observatory, a step toward the detector's planned start of observations.

$600M

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Christ Church Cathedral Reinstatement Targets 2027 Completion

ChristChurch Cathedral, Cathedral Square, Christchurch, New Zealand

Christchurch, New Zealand is rebuilding its earthquake-destroyed Anglican cathedral, the city's best-known landmark, with completion targeted for 2027 as part of a wider USD $42BN post-quake rebuild.

$42B

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Citicorp Center's Secret Structural Fix Wraps Up

601 Lexington Avenue, Manhattan, New York, NYCiticorp

Starts 10/31/1978ESTIMATED 69% CONFIDENCE47.9 years agoHappened as dated, per the source^[1]: "Repairs were completed in October 1978."

Engineers quietly finished weeks of overnight welding that fixed a hidden wind-bracing flaw in Manhattan's Citicorp Center, averting a possible collapse.

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Hagia Sophia's Dome Restoration

Hagia Sophia, Istanbul, Turkey

Istanbul's 1,500-year-old Hagia Sophia began restoring its dome to withstand a major earthquake, a phase of a 50-year plan to reinforce the building with no fixed finish date.

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NovarkaChernobyl Nuclear Power Plant, Chornobyl Exclusion Zone, Ukraine

Chornobyl NPP Accepts Novarka's New Safe Confinement Into Operation

Starts 11/08/2017CONFIRMED 90% CONFIDENCE8.9 years agoUkraine's Chornobyl NPP states it accepted the New Safe Confinement's Enclosing Perimeter into operation on 8 November 2017 (chnpp.gov.ua^[2]).

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Transport09/14/2026@BuildDesk

Marina Bay Sands breaks ground on its fourth tower

Marina Bay Sands, 10 Bayfront Avenue, SingaporeLas Vegas Sands…

Las Vegas Sands began construction on an $8BN fourth tower and 15,000-seat arena at Marina Bay Sands, designed by original architect Moshe Safdie.

$8B

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Réunion's Nouvelle Route du Littoral Set for Full Completion

Nouvelle Route du Littoral, La Grande Chaloupe, Saint-Denis, La Réunion, France

The final offshore-viaduct section of Réunion's storm-battered coastal highway replacement, plagued by quarry bans and redesigns, is now due to fully open by mid-2030.

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ExxonMobil Joins Hebron's Topsides to Its Gravity Base Structure at Bull Arm

ExxonMobil…Bull Arm, Newfoundland and Labrador, Canada

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Architecture09/20/2026@BuildDesk

Construction Begins on The Delmore, Surfside Collapse Site

8777 Collins Avenue, Surfside, Florida, United StatesDAMAC International

Starts 02/26/2025CONFIRMED 88% CONFIDENCE1.6 years agoHappened as dated, per the source^[1]: DAMAC International "unveils The Delmore... and commences construction" at the Surfside site.

DAMAC International broke ground on The Delmore, a Zaha Hadid Architects-designed condo tower replacing the collapsed Champlain Towers South, with far fewer, far pricier units than before.

$15M

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Hard Rock Las Vegas Tops Out Its 42-Story Guitar Tower

3400 South Las Vegas Boulevard, Las Vegas, NV

Hard Rock International

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