# Relationship history for MSHA mine 1512548

Current hierarchy: **Koch Industries Inc → C Reiss Coal Co/ Koch Victory Div → 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:** Koch Industries Inc → No 4; 1979-05-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Newman Brothers Mining Company Inc → No 4; 1980-10-01 to 1986-01-06; source msha-controller-operator-history
- **controller_controls_mine:** Newman Berman & Wendell → No 4; 1980-10-01 to 1986-01-06; source msha-controller-operator-history
- **controller_controls_operator:** Newman Berman & Wendell → Newman Brothers Mining Company Inc; 1980-10-01 to 1986-01-06; source msha-controller-operator-history
- **controller_controls_mine:** Darvin  Burchett et al → No 4; 1985-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Big Shiner Coal Company Inc → No 4; 1986-01-07 to 1987-05-05; source msha-controller-operator-history
- **controller_controls_operator:** Darvin  Burchett et al → Big Shiner Coal Company Inc; 1986-01-07 to 1987-05-05; source msha-controller-operator-history
- **controller_controls_operator:** J D McDonald et al → Big Shiner Coal Company Inc; 1986-01-07 to 1987-05-05; source msha-controller-operator-history
- **operator_operates_mine:** Ernco Mining Company Inc → No 4; 1987-05-06 to 1989-04-05; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Thornsberry et al → No 4; 1987-05-06 to 1989-04-05; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Thornsberry et al → Ernco Mining Company Inc; 1987-05-06 to 1989-04-05; source msha-controller-operator-history
- **controller_controls_mine:** Stanley W Osborne → No 4; 1988-02-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Koch Carbon Inc → No 4; 1989-04-06 to 1991-05-14; source msha-controller-operator-history
- **controller_controls_operator:** Koch Industries Inc → Koch Carbon Inc; 1989-04-06 to 1991-05-14; source msha-controller-operator-history
- **operator_operates_mine:** Laurel Ridge Coal Company Inc → No 4; 1991-05-15 to 1994-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Stanley W Osborne → Laurel Ridge Coal Company Inc; 1991-05-15 to 1994-07-31; source msha-controller-operator-history
- **operator_operates_mine:** C Reiss Coal Co/ Koch Victory Div → No 4; 1994-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Koch Industries Inc → No 4; 1994-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Koch Industries Inc → C Reiss Coal Co/ Koch Victory Div; 1994-08-01 to current/open; source msha-controller-operator-history