# Relationship history for MSHA mine 3607093

Current hierarchy: **Oscar  Blough Jr → D G W Coal Company → No 7 Vein Slope**

- 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:** R C & R Coal Company → No 7 Vein Slope; 1981-03-01 to 1985-11-25; source msha-controller-operator-history
- **controller_controls_mine:** Reiner Terry → No 7 Vein Slope; 1981-03-01 to 1985-11-25; source msha-controller-operator-history
- **controller_controls_operator:** Reiner Terry → R C & R Coal Company; 1981-03-01 to 1985-11-25; source msha-controller-operator-history
- **operator_operates_mine:** D G W Coal Company → No 7 Vein Slope; 1985-11-26 to 1991-05-25; source msha-controller-operator-history
- **controller_controls_mine:** Germani John-Gary Williard Et Al → No 7 Vein Slope; 1985-11-26 to 1991-05-25; source msha-controller-operator-history
- **controller_controls_operator:** Germani John-Gary Williard Et Al → D G W Coal Company; 1985-11-26 to 1991-05-25; source msha-controller-operator-history
- **operator_operates_mine:** D G W Coal Company → No 7 Vein Slope; 1991-05-26 to 1994-09-27; source msha-controller-operator-history
- **controller_controls_mine:** Donald C  Bender et al → No 7 Vein Slope; 1991-05-26 to 1994-09-27; source msha-controller-operator-history
- **controller_controls_operator:** Donald C  Bender et al → D G W Coal Company; 1991-05-26 to 1994-09-27; source msha-controller-operator-history
- **operator_operates_mine:** D G W Coal Company → No 7 Vein Slope; 1994-09-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Oscar  Blough Jr → No 7 Vein Slope; 1994-09-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Oscar  Blough Jr → D G W Coal Company; 1994-09-28 to current/open; source msha-controller-operator-history