# Relationship history for MSHA mine 4401488

Current hierarchy: **Pittston Company → Sea B Mining Company → Big Creek Tiller 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Sea B Mining Company → Big Creek Tiller Mine; 1950-01-01 to 1987-10-18; source msha-controller-operator-history
- **controller_controls_mine:** Pittston Company → Big Creek Tiller Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pittston Company → Sea B Mining Company; 1950-01-01 to 1987-10-18; source msha-controller-operator-history
- **operator_operates_mine:** West Fork Energy Inc → Big Creek Tiller Mine; 1987-10-19 to 1991-12-09; source msha-controller-operator-history
- **controller_controls_mine:** William P  Harris et al → Big Creek Tiller Mine; 1987-10-19 to 1991-12-09; source msha-controller-operator-history
- **controller_controls_operator:** William P  Harris et al → West Fork Energy Inc; 1987-10-19 to 1991-12-09; source msha-controller-operator-history
- **operator_operates_mine:** Charger Coal Company Inc → Big Creek Tiller Mine; 1991-12-10 to 1993-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Wyatt Jim → Big Creek Tiller Mine; 1991-12-10 to 1993-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Wyatt Jim → Charger Coal Company Inc; 1991-12-10 to 1993-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Sea B Mining Company → Big Creek Tiller Mine; 1993-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pittston Company → Sea B Mining Company; 1993-09-01 to current/open; source msha-controller-operator-history