At 0840 Company became aware of fall of ground beyond support, reported to MSHA hotline & field office at 0847. A verbal 103K order was issued at 1447. 10/20/16 inspector arrived at site, starting investigation. 10/21/16 remediation plan was developed & approved by Rocky Mtn. District & field office. 103K was terminated, company will update MSHA on the progress/completion of plan.