# Relationship history for MSHA mine 1515175

Current hierarchy: **Milford  Compton; Herstel  Ratliff → Clever Mining Company Inc → No 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

- **operator_operates_mine:** Mc Layne Resources Inc → No 1; 1985-04-01 to 1986-12-30; source msha-controller-operator-history
- **controller_controls_mine:** Les  Mayhorn et al → No 1; 1985-04-01 to 1986-12-30; source msha-controller-operator-history
- **controller_controls_operator:** Les  Mayhorn et al → Mc Layne Resources Inc; 1985-04-01 to 1986-12-30; source msha-controller-operator-history
- **operator_operates_mine:** Clever Mining Company Inc → No 1; 1986-12-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Milford  Compton et al → No 1; 1986-12-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Milford  Compton et al → Clever Mining Company Inc; 1986-12-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Herstel  Ratliff et al → Clever Mining Company Inc; 1986-12-31 to current/open; source msha-controller-operator-history