# Relationship history for MSHA mine 1512199

Current hierarchy: **Donn A  Chickering → Branham & Baker Coal Company, LLC → Branham & Baker Coal Terminal**

- 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:** Lockwood Coal Company → Branham & Baker Coal Terminal; 1979-12-01 to 1981-07-27; source msha-controller-operator-history
- **controller_controls_mine:** Richard M  Johnson → Branham & Baker Coal Terminal; 1979-12-01 to 1981-07-27; source msha-controller-operator-history
- **controller_controls_operator:** Richard M  Johnson → Lockwood Coal Company; 1979-12-01 to 1981-07-27; source msha-controller-operator-history
- **operator_operates_mine:** Riverway South Inc → Branham & Baker Coal Terminal; 1981-07-28 to 1983-07-31; source msha-controller-operator-history
- **controller_controls_mine:** David A  Jones → Branham & Baker Coal Terminal; 1981-07-28 to 1983-07-31; source msha-controller-operator-history
- **controller_controls_operator:** David A  Jones → Riverway South Inc; 1981-07-28 to 1983-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Riverway South Inc → Branham & Baker Coal Terminal; 1983-08-01 to 2023-02-27; source msha-controller-operator-history
- **controller_controls_mine:** Richard L  Cooper → Branham & Baker Coal Terminal; 1983-08-01 to 2007-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Richard L  Cooper → Riverway South Inc; 1983-08-01 to 2007-11-08; source msha-controller-operator-history
- **controller_controls_mine:** Daniel D  Tayloe → Branham & Baker Coal Terminal; 2007-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel D  Tayloe → Riverway South Inc; 2007-11-09 to 2023-02-27; source msha-controller-operator-history
- **operator_operates_mine:** Branham & Baker Coal Company, LLC → Branham & Baker Coal Terminal; 2023-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donn A  Chickering → Branham & Baker Coal Terminal; 2023-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donn A  Chickering → Branham & Baker Coal Company, LLC; 2023-02-28 to current/open; source msha-controller-operator-history