# Relationship history for MSHA mine 3608681

Current hierarchy: **Michael S  Carsia → Premium Fine Coal, Inc. → Mary-D Strip Operation**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** J C Coal Inc → Mary-D Strip Operation; 1997-07-01 to 2006-09-05; source msha-controller-operator-history
- **controller_controls_mine:** Greg  Schenck → Mary-D Strip Operation; 1997-07-01 to 2012-04-15; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Schenck → J C Coal Inc; 1997-07-01 to 2006-09-05; source msha-controller-operator-history
- **controller_controls_mine:** Charlie  Sorokach et al → Mary-D Strip Operation; 2001-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Scott B  Kimmel → Mary-D Strip Operation; 2001-12-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael S  Carsia → Mary-D Strip Operation; 2006-08-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Premium Fine Coal Inc → Mary-D Strip Operation; 2006-09-06 to 2010-03-14; source msha-controller-operator-history
- **controller_controls_operator:** Michael S  Carsia → Premium Fine Coal Inc; 2006-09-06 to 2010-03-14; source msha-controller-operator-history
- **operator_operates_mine:** Michael Coal Company, Inc. → Mary-D Strip Operation; 2010-03-15 to 2017-02-27; source msha-controller-operator-history
- **controller_controls_operator:** Scott B  Kimmel → Michael Coal Company, Inc.; 2010-03-15 to 2017-02-27; source msha-controller-operator-history
- **controller_controls_mine:** Neil  Schenck → Mary-D Strip Operation; 2012-04-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Neil  Schenck → J C Coal Inc; 2012-04-16 to 2006-09-05; source msha-controller-operator-history
- **operator_operates_mine:** Premium Fine Coal, Inc. → Mary-D Strip Operation; 2017-02-28 to 2017-04-16; source msha-controller-operator-history
- **controller_controls_operator:** Michael S  Carsia → Premium Fine Coal, Inc.; 2017-02-28 to 2017-04-16; source msha-controller-operator-history
- **operator_operates_mine:** Char-Pac Coal Company LLC → Mary-D Strip Operation; 2017-04-17 to 2019-09-08; source msha-controller-operator-history
- **controller_controls_operator:** Charlie  Sorokach et al → Char-Pac Coal Company LLC; 2017-04-17 to 2019-09-08; source msha-controller-operator-history
- **operator_operates_mine:** Premium Fine Coal, Inc. → Mary-D Strip Operation; 2019-09-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael S  Carsia → Premium Fine Coal, Inc.; 2019-09-09 to current/open; source msha-controller-operator-history