A large sinkhole opened up two weeks ago at a soccer park in Illinois..

Drone footage captured video of the collapse at Gordon F. Moore Park in Alton, Ill., which opened on June 26.

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Authorities said mine subsidence from an underground mine owned by New Frontier Materials caused the 100-foot wide, 30-foot deep sinkhole to open up.

According to a New Frontier Materials representative, the sinkhole has not grown in size since it first collapsed. However, authorities have not filled the sinkhole..

Illinois Gov. J.B. Pritzker said the federal government is involved and an investigation is underway to determine why the collapse happened and prevent it from happening again.

The 704-acre park has been closed since the sinkhole opened and there is no set date for reopening.