# Relationship history for MSHA mine 1517291

Current hierarchy: **Biliter Marvin Jr → Ebenezer Coal Company Inc → 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:** Goble Excavating & Reclamation Company → No 1; 1992-09-01 to 1992-11-24; source msha-controller-operator-history
- **controller_controls_mine:** Goble Greg → No 1; 1992-09-01 to 1992-11-24; source msha-controller-operator-history
- **controller_controls_operator:** Goble Greg → Goble Excavating & Reclamation Company; 1992-09-01 to 1992-11-24; source msha-controller-operator-history
- **operator_operates_mine:** Ebenezer Coal Company Inc → No 1; 1992-11-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Biliter Marvin Jr → No 1; 1992-11-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Biliter Marvin Jr → Ebenezer Coal Company Inc; 1992-11-25 to current/open; source msha-controller-operator-history