# Relationship history for MSHA mine 4405185

Current hierarchy: **Michael  Adkins → Adkins Coal Corp → 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

- **controller_controls_mine:** Compton Ronnie--Scott Mackney & Roy Hurt → No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ruth Ann Coal Company → No 1; 1979-03-01 to 1980-10-27; source msha-controller-operator-history
- **controller_controls_operator:** Compton Ronnie--Scott Mackney & Roy Hurt → Ruth Ann Coal Company; 1979-03-01 to 1980-10-27; source msha-controller-operator-history
- **operator_operates_mine:** N & R Coal Corp → No 1; 1980-10-28 to 1982-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Nichols T H → No 1; 1980-10-28 to 1982-04-06; source msha-controller-operator-history
- **controller_controls_operator:** Nichols T H → N & R Coal Corp; 1980-10-28 to 1982-04-06; source msha-controller-operator-history
- **operator_operates_mine:** Adkins Coal Corp → No 1; 1982-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Adkins → No 1; 1982-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Adkins → Adkins Coal Corp; 1982-04-07 to current/open; source msha-controller-operator-history