The implosion of the high-rise at 50 S. Main St. is scheduled for 6:30 a.m. - weather permitting - according to officials for the City Creek Center development.

For safety reasons, and to protect the public from clouds of dust, nine downtown blocks will be closed.

Police will cordon off the section from State Street to 200 West and North Temple to 200 South. No pedestrians or cars will be allowed inside the safety zone Aug. 18 from 1:30 a.m. until 10:30 a.m.

Buildings immediately around the tower on the former Crossroads Plaza block will be evacuated. However, guests and workers can remain at the Marriott Hotel, according to LDS Church spokesman Dale Bills, who is handling communication on the City Creek project.

The morning TRAX schedule also will be adjusted.

From the beginning of service Aug. 18 until 8 a.m., all trains will stop at the Courthouse Station, according to Utah Transit Authority spokesman Chad Saley.

From 8 to 10 a.m., Saley notes, the trains will go to the EnergySolutions Arena, but no stops will be made at either City Center or Temple Square.

Instead, a shuttle will run from the arena to the courthouse during those hours.

TRAX service will resume as usual after 10:30 a.m., Saley said.

Church officials note no accommodations will be made in the downtown area for the public to view the implosion.

Instead, a live television feed will be provided to the news media, and people are encouraged to watch the event on TV.

Though dust is expected to settle within 20 minutes of the demolition, cleanup crews will be on hand to remove dust from nearby roofs, sidewalks and streets for the subsequent four hours.

The 20-story office building - the last structure slated for destruction on the Crossroads block - is being razed to make way for new retail and residential space at the LDS Church's $1 billion-plus mall makeover labeled City Creek Center.

djensen@sltrib.com