# Relationship history for MSHA mine 1517141

Current hierarchy: **Rogers Gregory L → R & R Contractors → 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:** Solite Corp → Mine #1; 1974-04-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Terry Glenn Coal Company Inc → Mine #1; 1991-10-01 to 1992-06-03; source msha-controller-operator-history
- **controller_controls_operator:** Solite Corp → Terry Glenn Coal Company Inc; 1991-10-01 to 1992-06-03; source msha-controller-operator-history
- **operator_operates_mine:** Ace Mining Company Inc → Mine #1; 1992-06-04 to 1994-12-29; source msha-controller-operator-history
- **controller_controls_mine:** Barry  Rogers → Mine #1; 1992-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barry  Rogers → Ace Mining Company Inc; 1992-06-04 to 1994-12-29; source msha-controller-operator-history
- **operator_operates_mine:** Phillips Coal Company → Mine #1; 1994-12-30 to 1995-03-27; source msha-controller-operator-history
- **controller_controls_mine:** Skidmore Phillip → Mine #1; 1994-12-30 to 1995-03-27; source msha-controller-operator-history
- **controller_controls_operator:** Skidmore Phillip → Phillips Coal Company; 1994-12-30 to 1995-03-27; source msha-controller-operator-history
- **operator_operates_mine:** Ivey Coal Company → Mine #1; 1995-03-28 to 1995-04-27; source msha-controller-operator-history
- **controller_controls_mine:** Middleton Darrell Et Al → Mine #1; 1995-03-28 to 1995-04-27; source msha-controller-operator-history
- **controller_controls_operator:** Middleton Darrell Et Al → Ivey Coal Company; 1995-03-28 to 1995-04-27; source msha-controller-operator-history
- **operator_operates_mine:** A & C Mining Company → Mine #1; 1995-04-28 to 1996-06-26; source msha-controller-operator-history
- **controller_controls_mine:** Spaulding Robert E → Mine #1; 1995-04-28 to 1996-06-26; source msha-controller-operator-history
- **controller_controls_operator:** Spaulding Robert E → A & C Mining Company; 1995-04-28 to 1996-06-26; source msha-controller-operator-history
- **operator_operates_mine:** R & R Contractors → Mine #1; 1996-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rogers Gregory L → Mine #1; 1996-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Gregory L → R & R Contractors; 1996-06-27 to current/open; source msha-controller-operator-history