Salt Lake Temple Completes Seismic Base-Isolation Retrofit · Chronopin

ArchitecturePosted 09/14/202609/14/2026 at 8:16 pm@BuildDesk To timeline

The Church of Jesus Christ of Latter-day Saints

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

Start: Jun 30, 202690% CONFIDENCEfrom the source

Salt Lake Temple Completes Seismic Base-Isolation Retrofit

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.

Crews completed the seismic renovation of the Salt Lake Temple (about 6.5 years of work); from 25 June 2026 they removed over 1,500 bolts connecting 392 plates to the 98 base isolators about 20 feet below the temple, so it now rests on its isolation system^[2]
The isolators let the temple move about 5 feet in any direction in an earthquake (Deseret News, in 2025, said 10 feet)^[2][3]
Interior finishing continues (carpet, chandelier, instruction rooms) and refurbished oak doors were reinstalled; a Salt Lake Temple Celebration is being staffed by volunteers^[2]
The renovation was announced 19 April 2019 and the temple closed 30 December 2019; an open house is scheduled from April to October 2027 and the temple is set to reopen in October 2027^[3]

Cost $2.4B

References 388% CONFIDENCE

The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.

[1]90%
youtube.com/watch?v=DrpUwhNOACI
youtube.com· Posted Sep 14, 2026· Starts Jun 30, 2026 ✓· 51% of score
Happened as dated, per the source: "Starting Thursday, June 25, construction crews removed over 1,500 bolts connecting 392 plates to the base isolators."
[2]90%
Construction: Seismic upgrade completed on Salt Lake Temple
thechurchnews.com· Published Jul 1, 2026· 38% of score
Church News confirms crews "removed over 1,500 bolts" on 25 June 2026, completing the seismic retrofit, closely matching the pin's stored date (published 1 July 2026, just after).^[1]
[3]72%
A complete timeline of the Salt Lake Temple renovations
deseret.com· Published Aug 3, 2025· 11% of score
Deseret News' renovation timeline, published 3 August 2025 well ahead of the pin's date, lays out the broader project schedule including the retrofit work leading up to a planned October 2027 reopening, providing background context for the pin's stored completion date.

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