# Relationship history for MSHA mine 1502415

Current hierarchy: **Hodge Harvey → Little Bit Coal Company → No 3 Mine**

- 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:** Eddie Coal Company Inc → No 3 Mine; 1950-01-01 to 1973-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Sayler Goffery → No 3 Mine; 1950-01-01 to 1985-09-02; source msha-controller-operator-history
- **controller_controls_operator:** Sayler Goffery → Eddie Coal Company Inc; 1950-01-01 to 1973-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Dewey Ridge Mining Company → No 3 Mine; 1974-01-01 to 1975-01-14; source msha-controller-operator-history
- **controller_controls_mine:** Dewey Ridge Mining Co → No 3 Mine; 1974-01-01 to 1975-01-14; source msha-controller-operator-history
- **controller_controls_operator:** Dewey Ridge Mining Co → Dewey Ridge Mining Company; 1974-01-01 to 1975-01-14; source msha-controller-operator-history
- **operator_operates_mine:** Little Bit Coal Company → No 3 Mine; 1975-01-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hodge Harvey → No 3 Mine; 1975-01-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hodge Harvey → Little Bit Coal Company; 1975-01-15 to current/open; source msha-controller-operator-history