# Relationship history for MSHA mine 4406138

Current hierarchy: **Metec Acquisition Corp → Carbon Seam Systems Inc → #1 Auger**

- 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:** Inspiration Resources Corporation → #1 Auger; 1981-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Metec Acquisition Corp → #1 Auger; 1981-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Harman Mining Corp → #1 Auger; 1984-09-01 to 1985-06-20; source msha-controller-operator-history
- **controller_controls_operator:** Inspiration Resources Corporation → Harman Mining Corp; 1984-09-01 to 1985-06-20; source msha-controller-operator-history
- **controller_controls_mine:** William B  Sturgill → #1 Auger; 1985-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Clevinger Inc → #1 Auger; 1985-06-21 to 1986-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Clevinger Luther R → #1 Auger; 1985-06-21 to 1986-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Clevinger Luther R → Clevinger Inc; 1985-06-21 to 1986-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Betty Sue Mining Inc → #1 Auger; 1986-08-01 to 1987-09-14; source msha-controller-operator-history
- **controller_controls_mine:** Breeding Samuel J → #1 Auger; 1986-08-01 to 1987-09-14; source msha-controller-operator-history
- **controller_controls_operator:** Breeding Samuel J → Betty Sue Mining Inc; 1986-08-01 to 1987-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Oak Branch Coal Mining Company Inc → #1 Auger; 1987-09-15 to 1987-10-12; source msha-controller-operator-history
- **controller_controls_operator:** William B  Sturgill → Oak Branch Coal Mining Company Inc; 1987-09-15 to 1987-10-12; source msha-controller-operator-history
- **operator_operates_mine:** Carbon Seam Systems Inc → #1 Auger; 1987-10-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Metec Acquisition Corp → Carbon Seam Systems Inc; 1987-10-13 to current/open; source msha-controller-operator-history