# Relationship history for MSHA mine 1505315

Current hierarchy: **Thomas R  Hamilton → Nally & Hamilton Enterprises Inc → Artemus Tipple**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Knox Fuel Company → Artemus Tipple; 1950-01-01 to 1976-08-29; source msha-controller-operator-history
- **controller_controls_mine:** Knox Fuel Company → Artemus Tipple; 1950-01-01 to 1976-08-29; source msha-controller-operator-history
- **controller_controls_operator:** Knox Fuel Company → Knox Fuel Company; 1950-01-01 to 1976-08-29; source msha-controller-operator-history
- **controller_controls_mine:** Thomas R  Hamilton et al → Artemus Tipple; 1974-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bituminous Laurel Mining Inc → Artemus Tipple; 1976-08-30 to 1977-01-26; source msha-controller-operator-history
- **controller_controls_mine:** Jones Harold E → Artemus Tipple; 1976-08-30 to 1977-01-26; source msha-controller-operator-history
- **controller_controls_operator:** Jones Harold E → Bituminous Laurel Mining Inc; 1976-08-30 to 1977-01-26; source msha-controller-operator-history
- **operator_operates_mine:** Bituminous-Laurel Mining Inc → Artemus Tipple; 1977-01-27 to 1985-08-25; source msha-controller-operator-history
- **controller_controls_mine:** Aminex Resources Corp → Artemus Tipple; 1977-01-27 to 1985-08-25; source msha-controller-operator-history
- **controller_controls_operator:** Aminex Resources Corp → Bituminous-Laurel Mining Inc; 1977-01-27 to 1985-08-25; source msha-controller-operator-history
- **operator_operates_mine:** Nally & Hamilton Enterprises Inc → Artemus Tipple; 1985-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas R  Hamilton et al → Nally & Hamilton Enterprises Inc; 1985-08-26 to current/open; source msha-controller-operator-history