# Relationship history for MSHA mine 0300938

Current hierarchy: **Arkoma Coal Corp → Arkoma Mining Corp → Titan #1 Strip**

- 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:** Hixson Coal Company Inc → Titan #1 Strip; 1975-01-01 to 1975-09-16; source msha-controller-operator-history
- **controller_controls_mine:** Hixson W T → Titan #1 Strip; 1975-01-01 to 1975-09-16; source msha-controller-operator-history
- **controller_controls_operator:** Hixson W T → Hixson Coal Company Inc; 1975-01-01 to 1975-09-16; source msha-controller-operator-history
- **operator_operates_mine:** Titan Mining Ltd → Titan #1 Strip; 1975-09-17 to 1978-03-26; source msha-controller-operator-history
- **controller_controls_mine:** Kane David R → Titan #1 Strip; 1975-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kane David R → Titan Mining Ltd; 1975-09-17 to 1978-03-26; source msha-controller-operator-history
- **operator_operates_mine:** Arkoma Mining Corp → Titan #1 Strip; 1978-03-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Arkoma Coal Corp → Titan #1 Strip; 1978-03-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arkoma Coal Corp → Arkoma Mining Corp; 1978-03-27 to current/open; source msha-controller-operator-history