# Relationship history for MSHA mine 4605276

Current hierarchy: **Diamond Shamrock Corp → Amherst Coal Company → Lundale No 2c**

- 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:** H E  Jones Jr et al → Lundale No 2c; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Amherst Coal Company → Lundale No 2c; 1976-08-27 to 1982-08-14; source msha-controller-operator-history
- **controller_controls_operator:** H E  Jones Jr et al → Amherst Coal Company; 1976-08-27 to 1982-08-14; source msha-controller-operator-history
- **controller_controls_operator:** Charles T  Jones et al → Amherst Coal Company; 1976-08-27 to 1982-08-14; source msha-controller-operator-history
- **controller_controls_mine:** Diamond Shamrock Corp → Lundale No 2c; 1981-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Amherst Coal Company → Lundale No 2c; 1982-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Diamond Shamrock Corp → Amherst Coal Company; 1982-08-15 to current/open; source msha-controller-operator-history