# Relationship history for MSHA mine 4607470

Current hierarchy: **Raymond  Cline → Amron Corp → #1 Mine**

- 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:** Hall Clyde → #1 Mine; 1987-05-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C & E Coal Company → #1 Mine; 1988-02-01 to 1989-12-06; source msha-controller-operator-history
- **controller_controls_operator:** Hall Clyde → C & E Coal Company; 1988-02-01 to 1989-12-06; source msha-controller-operator-history
- **operator_operates_mine:** Garland Coal Sales Inc → #1 Mine; 1989-12-07 to 1989-12-27; source msha-controller-operator-history
- **controller_controls_mine:** David  Hopkins → #1 Mine; 1989-12-07 to 1989-12-27; source msha-controller-operator-history
- **controller_controls_operator:** David  Hopkins → Garland Coal Sales Inc; 1989-12-07 to 1989-12-27; source msha-controller-operator-history
- **operator_operates_mine:** White & Lawson Mineral Development Company → #1 Mine; 1989-12-28 to 1990-01-28; source msha-controller-operator-history
- **controller_controls_mine:** White Tom & Charles Lawson → #1 Mine; 1989-12-28 to 1990-01-28; source msha-controller-operator-history
- **controller_controls_operator:** White Tom & Charles Lawson → White & Lawson Mineral Development Company; 1989-12-28 to 1990-01-28; source msha-controller-operator-history
- **operator_operates_mine:** Amron Corp → #1 Mine; 1990-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Raymond  Cline → #1 Mine; 1990-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Raymond  Cline → Amron Corp; 1990-01-29 to current/open; source msha-controller-operator-history