# Relationship history for MSHA mine 1516117

Current hierarchy: **Ratliff Judy → High Sulfur Coal Company → #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:** Robert C  Ratliff → #1; 1986-09-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ratliff Judy Et Al → #1; 1986-11-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** T R & H Development Inc → #1; 1987-08-01 to 1988-04-25; source msha-controller-operator-history
- **controller_controls_operator:** Robert C  Ratliff → T R & H Development Inc; 1987-08-01 to 1988-04-25; source msha-controller-operator-history
- **operator_operates_mine:** Double Development Inc → #1; 1988-04-26 to 1989-01-19; source msha-controller-operator-history
- **controller_controls_operator:** Ratliff Judy Et Al → Double Development Inc; 1988-04-26 to 1989-01-19; source msha-controller-operator-history
- **operator_operates_mine:** B & E Contracting → #1; 1989-01-20 to 1989-05-07; source msha-controller-operator-history
- **controller_controls_mine:** Ratliff Edward & Brent Keathley → #1; 1989-01-20 to 1989-05-07; source msha-controller-operator-history
- **controller_controls_operator:** Ratliff Edward & Brent Keathley → B & E Contracting; 1989-01-20 to 1989-05-07; source msha-controller-operator-history
- **operator_operates_mine:** High Sulfur Coal Company → #1; 1989-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ratliff Judy Et Al → #1; 1989-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ratliff Judy Et Al → High Sulfur Coal Company; 1989-05-08 to current/open; source msha-controller-operator-history