# Relationship history for MSHA mine 4604145

Current hierarchy: **Hardesty John R Jr & John P Boyle → Harbova Mining Company Inc → Howesville 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Avx Inc → Howesville Tipple; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lewis Coal & Coke Company Inc → Howesville Tipple; 1974-05-01 to 1982-01-12; source msha-controller-operator-history
- **controller_controls_operator:** Avx Inc → Lewis Coal & Coke Company Inc; 1974-05-01 to 1982-01-12; source msha-controller-operator-history
- **controller_controls_mine:** Hardesty John R Jr & John P Boyle → Howesville Tipple; 1979-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Harbova Mining Company Inc → Howesville Tipple; 1982-01-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hardesty John R Jr & John P Boyle → Harbova Mining Company Inc; 1982-01-13 to current/open; source msha-controller-operator-history