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Central Park Manor, next to the Lake Placid construction site on 13th Avenue S.W. in Calgary, was twice evacuated over concerns that it had become structurally unsound. ((CBC))

A Beltline construction site excavation has been ordered backfilled by the City of Calgary.

The city's chief building inspector served the order to Lake Placid Properties Inc. on Friday, the city said in a news release.

The site is located at 303 13th Ave. S.W., at the corner of Second Street S.W.

"The Centuria on the Park [condominium] excavation and construction site is a danger to public safety and adjacent properties," Kevin Griffiths, chief building inspector, said in a news release.

Backfill work has to start by Sept. 24 and end by Nov. 15, the city said. If Lake Placid doesn't comply, the city will do the work and bill the company.

The city said this is the third order it has issued to Lake Placed to resolve safety concerns at Centuria on the Park.

Griffiths said the owner's actions have been ineffective in resolving the safety concerns.

In July, the condo building next to the Lake Placid construction site was emptied for the second time because of concerns a sinkhole was forming across the street.

At the time, Lake Placid president Michael Lobsinger told CBC News he believed the problem originated at the site of the evacuated building.

Another sinkhole issue had prompted a similar evacuation in May 2009.