# Relationship history for MSHA mine 1800529

Current hierarchy: **Jason A  Kitzmiller → Cobra Mining Inc → Cobra No 1**

- 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:** Eckhart Coal Company → Cobra No 1; 1974-05-01 to 1994-06-28; source msha-controller-operator-history
- **controller_controls_mine:** H Edwin  Eckhart → Cobra No 1; 1974-05-01 to 1994-06-28; source msha-controller-operator-history
- **controller_controls_operator:** H Edwin  Eckhart → Eckhart Coal Company; 1974-05-01 to 1994-06-28; source msha-controller-operator-history
- **operator_operates_mine:** Cobra Mining Inc → Cobra No 1; 1994-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alan D  Clark et al → Cobra No 1; 1994-06-29 to 2020-04-06; source msha-controller-operator-history
- **controller_controls_operator:** Alan D  Clark et al → Cobra Mining Inc; 1994-06-29 to 2020-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Victor E  Clark Jr → Cobra No 1; 2020-04-07 to 2023-11-14; source msha-controller-operator-history
- **controller_controls_operator:** Victor E  Clark Jr → Cobra Mining Inc; 2020-04-07 to 2023-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Jason A  Kitzmiller → Cobra No 1; 2023-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason A  Kitzmiller → Cobra Mining Inc; 2023-11-15 to current/open; source msha-controller-operator-history