# Relationship history for MSHA mine 4401367

Current hierarchy: **Davis Jerry M → Crockett Coal 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:** Helen Coal Co Inc → No 1; 1950-01-01 to 1972-12-30; source msha-controller-operator-history
- **controller_controls_mine:** Helen Coal Co Inc → No 1; 1950-01-01 to 1972-12-30; source msha-controller-operator-history
- **controller_controls_operator:** Helen Coal Co Inc → Helen Coal Co Inc; 1950-01-01 to 1972-12-30; source msha-controller-operator-history
- **operator_operates_mine:** Apache Bituminous Coal Co → No 1; 1972-12-31 to 1980-08-14; source msha-controller-operator-history
- **controller_controls_mine:** Smoot Shelby & William Hawkins → No 1; 1972-12-31 to 1980-08-14; source msha-controller-operator-history
- **controller_controls_operator:** Smoot Shelby & William Hawkins → Apache Bituminous Coal Co; 1972-12-31 to 1980-08-14; source msha-controller-operator-history
- **operator_operates_mine:** Crockett Coal Company Inc → No 1; 1980-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Davis Jerry M Et Al → No 1; 1980-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Davis Jerry M Et Al → Crockett Coal Company Inc; 1980-08-15 to current/open; source msha-controller-operator-history