# Relationship history for MSHA mine 1515042

Current hierarchy: **Salyers Roger & Jerry Farley → B & D Energy Inc → No 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:** Joseph Brothers Inc → No 1; 1978-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cornett Rudy → No 1; 1984-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R C Coal Company Inc → No 1; 1985-01-01 to 1985-07-21; source msha-controller-operator-history
- **controller_controls_operator:** Cornett Rudy → R C Coal Company Inc; 1985-01-01 to 1985-07-21; source msha-controller-operator-history
- **operator_operates_mine:** Sidewinder Coal Company Inc → No 1; 1985-07-22 to 1988-06-28; source msha-controller-operator-history
- **controller_controls_mine:** Caudill Jackie → No 1; 1985-07-22 to 1988-06-28; source msha-controller-operator-history
- **controller_controls_operator:** Caudill Jackie → Sidewinder Coal Company Inc; 1985-07-22 to 1988-06-28; source msha-controller-operator-history
- **operator_operates_mine:** Emory & Henry Mining Inc → No 1; 1988-06-29 to 1988-11-18; source msha-controller-operator-history
- **controller_controls_mine:** Stephenson Henry F Jr → No 1; 1988-06-29 to 1988-11-18; source msha-controller-operator-history
- **controller_controls_operator:** Stephenson Henry F Jr → Emory & Henry Mining Inc; 1988-06-29 to 1988-11-18; source msha-controller-operator-history
- **operator_operates_mine:** Joseph Brothers Inc → No 1; 1988-11-19 to 1989-07-30; source msha-controller-operator-history
- **controller_controls_operator:** Joseph Brothers Inc → Joseph Brothers Inc; 1988-11-19 to 1989-07-30; source msha-controller-operator-history
- **operator_operates_mine:** R & E Coal Company → No 1; 1989-07-31 to 1990-05-17; source msha-controller-operator-history
- **controller_controls_mine:** Hawkins Edgar → No 1; 1989-07-31 to 1990-05-17; source msha-controller-operator-history
- **controller_controls_operator:** Hawkins Edgar → R & E Coal Company; 1989-07-31 to 1990-05-17; source msha-controller-operator-history
- **operator_operates_mine:** Ring Coal Sales Inc → No 1; 1990-05-18 to 1991-10-19; source msha-controller-operator-history
- **controller_controls_mine:** Samuel  Ring → No 1; 1990-05-18 to 1991-10-19; source msha-controller-operator-history
- **controller_controls_operator:** Samuel  Ring → Ring Coal Sales Inc; 1990-05-18 to 1991-10-19; source msha-controller-operator-history
- **operator_operates_mine:** Tiger Development Inc → No 1; 1991-10-20 to 1992-04-23; source msha-controller-operator-history
- **controller_controls_mine:** Davis Jerry M Et Al → No 1; 1991-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Davis Jerry M Et Al → Tiger Development Inc; 1991-10-20 to 1992-04-23; source msha-controller-operator-history
- **operator_operates_mine:** B & D Energy Inc → No 1; 1992-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Salyers Roger & Jerry Farley → No 1; 1992-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Salyers Roger & Jerry Farley → B & D Energy Inc; 1992-04-24 to current/open; source msha-controller-operator-history