# Relationship history for MSHA mine 1516040

Current hierarchy: **Carr David-Steve Yount → Buck Coal Company → No1**

- 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

- **operator_operates_mine:** Rainbow Coal Company → No1; 1987-05-01 to 1988-06-28; source msha-controller-operator-history
- **controller_controls_mine:** Lewallen Deana M--Dale Carpenter Et Al → No1; 1987-05-01 to 1988-06-28; source msha-controller-operator-history
- **controller_controls_operator:** Lewallen Deana M--Dale Carpenter Et Al → Rainbow Coal Company; 1987-05-01 to 1988-06-28; source msha-controller-operator-history
- **operator_operates_mine:** Tippy Coal Company → No1; 1988-06-29 to 1989-08-06; source msha-controller-operator-history
- **controller_controls_mine:** Lewallen Keith Et Al → No1; 1988-06-29 to 1989-08-06; source msha-controller-operator-history
- **controller_controls_operator:** Lewallen Keith Et Al → Tippy Coal Company; 1988-06-29 to 1989-08-06; source msha-controller-operator-history
- **operator_operates_mine:** Great Southern Coal Company → No1; 1989-08-07 to 1991-02-24; source msha-controller-operator-history
- **controller_controls_mine:** Mason Jerry Et Al → No1; 1989-08-07 to 1991-02-24; source msha-controller-operator-history
- **controller_controls_operator:** Mason Jerry Et Al → Great Southern Coal Company; 1989-08-07 to 1991-02-24; source msha-controller-operator-history
- **operator_operates_mine:** Tyco Company → No1; 1991-02-25 to 1991-06-27; source msha-controller-operator-history
- **controller_controls_mine:** Tyree Charles E Et Al → No1; 1991-02-25 to 1991-06-27; source msha-controller-operator-history
- **controller_controls_operator:** Tyree Charles E Et Al → Tyco Company; 1991-02-25 to 1991-06-27; source msha-controller-operator-history
- **operator_operates_mine:** Buck Coal Company → No1; 1991-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Carr David-Steve Yount Et Al → No1; 1991-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carr David-Steve Yount Et Al → Buck Coal Company; 1991-06-28 to current/open; source msha-controller-operator-history