# Relationship history for MSHA mine 1516156

Current hierarchy: **Williamson Daniel B → Flintstone Mining Inc → Bedrock Mine #1**

- 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:** Mann Franklin & Haskell Addington → Bedrock Mine #1; 1985-11-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dean  Francis → Bedrock Mine #1; 1987-01-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Fountain Blue Coal Company Inc → Bedrock Mine #1; 1987-09-01 to 1997-07-24; source msha-controller-operator-history
- **controller_controls_operator:** Mann Franklin & Haskell Addington → Fountain Blue Coal Company Inc; 1987-09-01 to 1997-07-24; source msha-controller-operator-history
- **controller_controls_mine:** Milford  Compton et al → Bedrock Mine #1; 1997-03-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** A & A Francis Energy Inc → Bedrock Mine #1; 1997-07-25 to 1997-09-10; source msha-controller-operator-history
- **controller_controls_operator:** Dean  Francis → A & A Francis Energy Inc; 1997-07-25 to 1997-09-10; source msha-controller-operator-history
- **operator_operates_mine:** Mc Veigh Mining Inc → Bedrock Mine #1; 1997-09-11 to 1997-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Bowe Michael → Bedrock Mine #1; 1997-09-11 to 1997-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Bowe Michael → Mc Veigh Mining Inc; 1997-09-11 to 1997-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Blackstar Coal Company Inc → Bedrock Mine #1; 1997-10-01 to 1998-08-13; source msha-controller-operator-history
- **controller_controls_operator:** Milford  Compton et al → Blackstar Coal Company Inc; 1997-10-01 to 1998-08-13; source msha-controller-operator-history
- **controller_controls_operator:** Herstel  Ratliff et al → Blackstar Coal Company Inc; 1997-10-01 to 1998-08-13; source msha-controller-operator-history
- **operator_operates_mine:** Flintstone Mining Inc → Bedrock Mine #1; 1998-08-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Williamson Daniel B → Bedrock Mine #1; 1998-08-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Williamson Daniel B → Flintstone Mining Inc; 1998-08-14 to current/open; source msha-controller-operator-history