# Relationship history for MSHA mine 1502397

Current hierarchy: **Hunt James E → Shell Coal Company → Mine No 2**

- 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:** C & M Coal Company → Mine No 2; 1950-01-01 to 1972-12-30; source msha-controller-operator-history
- **controller_controls_mine:** C & M Coal Company → Mine No 2; 1950-01-01 to 1972-12-30; source msha-controller-operator-history
- **controller_controls_operator:** C & M Coal Company → C & M Coal Company; 1950-01-01 to 1972-12-30; source msha-controller-operator-history
- **controller_controls_mine:** Little Beaver Coal Co → Mine No 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hunt James E → Mine No 2; 1972-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Little Beaver Coal Company → Mine No 2; 1972-12-31 to 1973-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Little Beaver Coal Co → Little Beaver Coal Company; 1972-12-31 to 1973-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Shell Coal Company → Mine No 2; 1973-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hunt James E → Shell Coal Company; 1973-03-01 to current/open; source msha-controller-operator-history