# Relationship history for MSHA mine 4608714

Current hierarchy: **Jimmie R  Ryan → Ryanstone Coal, LLC → Ryanstone No. 2 Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Paul F  Thomas → Ryanstone No. 2 Mine; 1991-08-13 to 1999-06-21; source msha-controller-operator-history
- **operator_operates_mine:** Bass Energy Inc → Ryanstone No. 2 Mine; 1998-05-01 to 1998-09-13; source msha-controller-operator-history
- **controller_controls_operator:** Paul F  Thomas → Bass Energy Inc; 1998-05-01 to 1998-09-13; source msha-controller-operator-history
- **operator_operates_mine:** Fairmont Energy Inc → Ryanstone No. 2 Mine; 1998-09-14 to 2000-01-10; source msha-controller-operator-history
- **controller_controls_mine:** Alan  Thomas → Ryanstone No. 2 Mine; 1998-09-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alan  Thomas → Fairmont Energy Inc; 1998-09-14 to 2000-01-10; source msha-controller-operator-history
- **controller_controls_mine:** J Maurice  Des Rosier → Ryanstone No. 2 Mine; 1999-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** P I T A Mining Inc → Ryanstone No. 2 Mine; 2000-01-11 to 2000-05-09; source msha-controller-operator-history
- **controller_controls_operator:** J Maurice  Des Rosier → P I T A Mining Inc; 2000-01-11 to 2000-05-09; source msha-controller-operator-history
- **operator_operates_mine:** P I T A Mining Inc → Ryanstone No. 2 Mine; 2000-05-10 to 2001-01-03; source msha-controller-operator-history
- **controller_controls_mine:** Dennis G  Cook → Ryanstone No. 2 Mine; 2000-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis G  Cook → P I T A Mining Inc; 2000-05-10 to 2001-01-03; source msha-controller-operator-history
- **operator_operates_mine:** Bishoff Brothers Inc → Ryanstone No. 2 Mine; 2001-01-04 to 2002-03-31; source msha-controller-operator-history
- **controller_controls_mine:** James R  Bishoff et al → Ryanstone No. 2 Mine; 2001-01-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James R  Bishoff et al → Bishoff Brothers Inc; 2001-01-04 to 2002-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Johnny J  Bishoff et al → Bishoff Brothers Inc; 2001-01-04 to 2002-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Jimmie R  Ryan et al → Ryanstone No. 2 Mine; 2001-06-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ryanstone Coal, LLC → Ryanstone No. 2 Mine; 2002-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jimmie R  Ryan et al → Ryanstone Coal, LLC; 2002-04-01 to current/open; source msha-controller-operator-history