# Relationship history for MSHA mine 3607371

Current hierarchy: **Dalvet Robert → Templeton Coal Company → Bell Carbon Bank & Plant**

- 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:** David Job  Suender → Bell Carbon Bank & Plant; 1973-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joseph R  Hughes et al → Bell Carbon Bank & Plant; 1980-06-01 to 1986-07-27; source msha-controller-operator-history
- **operator_operates_mine:** Hughes Contracting Company → Bell Carbon Bank & Plant; 1982-09-01 to 1986-07-27; source msha-controller-operator-history
- **controller_controls_operator:** Joseph R  Hughes et al → Hughes Contracting Company; 1982-09-01 to 1986-07-27; source msha-controller-operator-history
- **controller_controls_mine:** Durkin Edward E → Bell Carbon Bank & Plant; 1985-08-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gale Coal Company Inc → Bell Carbon Bank & Plant; 1986-07-28 to 1986-12-08; source msha-controller-operator-history
- **controller_controls_operator:** David Job  Suender → Gale Coal Company Inc; 1986-07-28 to 1986-12-08; source msha-controller-operator-history
- **operator_operates_mine:** Alderney Coal Company Inc → Bell Carbon Bank & Plant; 1986-12-09 to 1989-07-04; source msha-controller-operator-history
- **controller_controls_operator:** Durkin Edward E → Alderney Coal Company Inc; 1986-12-09 to 1989-07-04; source msha-controller-operator-history
- **operator_operates_mine:** Templeton Coal Company → Bell Carbon Bank & Plant; 1989-07-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dalvet Robert → Bell Carbon Bank & Plant; 1989-07-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dalvet Robert → Templeton Coal Company; 1989-07-05 to current/open; source msha-controller-operator-history