# Relationship history for MSHA mine 1517963

Current hierarchy: **James A  Hubbard → Cornettsville Coal Company → #1 Mine**

- 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

- **operator_operates_mine:** Parcoal Inc → #1 Mine; 1997-08-01 to 1999-08-23; source msha-controller-operator-history
- **controller_controls_mine:** Thomas  Parsons → #1 Mine; 1997-08-01 to 1999-08-23; source msha-controller-operator-history
- **controller_controls_operator:** Thomas  Parsons → Parcoal Inc; 1997-08-01 to 1999-08-23; source msha-controller-operator-history
- **operator_operates_mine:** Cornettsville Coal Company → #1 Mine; 1999-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James A  Hubbard → #1 Mine; 1999-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James A  Hubbard → Cornettsville Coal Company; 1999-08-24 to current/open; source msha-controller-operator-history