# Relationship history for MSHA mine 4002735

Current hierarchy: **Mc Glothlin Henry M → H M Mc Glothlin Coal Company Inc → Deep Mine No 17**

- 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:** Mc Glothlin Henry M → Deep Mine No 17; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Campbell Coal Company → Deep Mine No 17; 1981-08-01 to 1983-12-11; source msha-controller-operator-history
- **controller_controls_mine:** Campbell Ernest & Neil → Deep Mine No 17; 1981-08-01 to 1983-12-11; source msha-controller-operator-history
- **controller_controls_operator:** Campbell Ernest & Neil → Campbell Coal Company; 1981-08-01 to 1983-12-11; source msha-controller-operator-history
- **operator_operates_mine:** B & R Coal Company Inc → Deep Mine No 17; 1983-12-12 to 1984-03-14; source msha-controller-operator-history
- **controller_controls_mine:** Harman James E → Deep Mine No 17; 1983-12-12 to 1984-03-14; source msha-controller-operator-history
- **controller_controls_operator:** Harman James E → B & R Coal Company Inc; 1983-12-12 to 1984-03-14; source msha-controller-operator-history
- **operator_operates_mine:** Dena Mining Corp → Deep Mine No 17; 1984-03-15 to 1984-08-26; source msha-controller-operator-history
- **controller_controls_mine:** Blankenship Frank → Deep Mine No 17; 1984-03-15 to 1984-08-26; source msha-controller-operator-history
- **controller_controls_operator:** Blankenship Frank → Dena Mining Corp; 1984-03-15 to 1984-08-26; source msha-controller-operator-history
- **operator_operates_mine:** H M Mc Glothlin Coal Company Inc → Deep Mine No 17; 1984-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Glothlin Henry M → H M Mc Glothlin Coal Company Inc; 1984-08-27 to current/open; source msha-controller-operator-history