# Relationship history for MSHA mine 1515719

Current hierarchy: **Rice Ronnie → Clever Mining Company Inc → No 4**

- 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:** Jo-Mark Coal Company Inc → No 4; 1986-08-01 to 1988-03-21; source msha-controller-operator-history
- **controller_controls_mine:** Justus Donald Et Al → No 4; 1986-08-01 to 1988-03-21; source msha-controller-operator-history
- **controller_controls_operator:** Justus Donald Et Al → Jo-Mark Coal Company Inc; 1986-08-01 to 1988-03-21; source msha-controller-operator-history
- **controller_controls_mine:** Milford  Compton et al → No 4; 1986-12-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Clever Mining Company Inc → No 4; 1988-03-22 to 1989-04-13; source msha-controller-operator-history
- **controller_controls_operator:** Milford  Compton et al → Clever Mining Company Inc; 1988-03-22 to 1989-04-13; source msha-controller-operator-history
- **controller_controls_operator:** Herstel  Ratliff et al → Clever Mining Company Inc; 1988-03-22 to 1989-04-13; source msha-controller-operator-history
- **operator_operates_mine:** Clever Mining Company Inc → No 4; 1989-04-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rice Ronnie → No 4; 1989-04-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rice Ronnie → Clever Mining Company Inc; 1989-04-14 to current/open; source msha-controller-operator-history