# Relationship history for MSHA mine 4406915

Current hierarchy: **Jerry  Skeens; Eddie  Skeens → Falcon Coal Corp → Mine No 4**

- 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

- **controller_controls_mine:** Thyssen Schachtbau Gmbh → Mine No 4; 1982-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jerry  Skeens  et al → Mine No 4; 1987-06-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Betty B Coal Company Inc → Mine No 4; 1998-06-01 to 1999-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Thyssen Schachtbau Gmbh → Betty B Coal Company Inc; 1998-06-01 to 1999-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Falcon Coal Corp → Mine No 4; 1999-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Skeens  et al → Falcon Coal Corp; 1999-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eddie  Skeens  et al → Falcon Coal Corp; 1999-05-01 to current/open; source msha-controller-operator-history