# Relationship history for MSHA mine 1800821

Current hierarchy: **Jason A  Kitzmiller → Cobra Mining, Inc. → No. 4 Woodyard Job**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Alan D  Clark et al → No. 4 Woodyard Job; 1994-06-29 to 2020-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Victor E  Clark Jr → No. 4 Woodyard Job; 2020-04-07 to 2023-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Jason A  Kitzmiller → No. 4 Woodyard Job; 2023-11-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cobra Mining, Inc. → No. 4 Woodyard Job; 2024-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason A  Kitzmiller → Cobra Mining, Inc.; 2024-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Victor E  Clark Jr → Cobra Mining, Inc.; 2024-07-15 to 2023-11-14; source msha-controller-operator-history
- **controller_controls_operator:** Alan D  Clark et al → Cobra Mining, Inc.; 2024-07-15 to 2020-04-06; source msha-controller-operator-history