# Relationship history for MSHA mine 1515718

Current hierarchy: **Ratliff Judy → Double Development Inc → No 2**

- 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:** Daniel (Jeff) Paul → No 2; 1981-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ratliff Frank → No 2; 1983-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ratliff Mining Company → No 2; 1986-08-01 to 1986-11-20; source msha-controller-operator-history
- **controller_controls_operator:** Ratliff Frank → Ratliff Mining Company; 1986-08-01 to 1986-11-20; source msha-controller-operator-history
- **operator_operates_mine:** Double Development Inc → No 2; 1986-11-21 to 1987-04-12; source msha-controller-operator-history
- **controller_controls_mine:** Ratliff Judy Et Al → No 2; 1986-11-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ratliff Judy Et Al → Double Development Inc; 1986-11-21 to 1987-04-12; source msha-controller-operator-history
- **operator_operates_mine:** Jeffco Mining → No 2; 1987-04-13 to 1987-06-10; source msha-controller-operator-history
- **controller_controls_operator:** Daniel (Jeff) Paul → Jeffco Mining; 1987-04-13 to 1987-06-10; source msha-controller-operator-history
- **operator_operates_mine:** Double Development Inc → No 2; 1987-06-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ratliff Judy Et Al → Double Development Inc; 1987-06-11 to current/open; source msha-controller-operator-history