# Relationship history for MSHA mine 3607589

Current hierarchy: **Donofrio Robert → Skyview Coal Company → Diamond 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

- **controller_controls_mine:** Glosek Edward Et Al → Diamond Slope; 1974-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sky View Coal Company → Diamond Slope; 1984-07-01 to 1985-06-02; source msha-controller-operator-history
- **controller_controls_operator:** Glosek Edward Et Al → Sky View Coal Company; 1984-07-01 to 1985-06-02; source msha-controller-operator-history
- **operator_operates_mine:** Sky View Coal Company → Diamond Slope; 1985-06-03 to 1989-11-05; source msha-controller-operator-history
- **controller_controls_mine:** Whalen  Wenrich Jr et al → Diamond Slope; 1985-06-03 to 1989-11-05; source msha-controller-operator-history
- **controller_controls_operator:** Whalen  Wenrich Jr et al → Sky View Coal Company; 1985-06-03 to 1989-11-05; source msha-controller-operator-history
- **controller_controls_mine:** Donofrio Robert Et Al → Diamond Slope; 1989-08-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Skyview Coal Company → Diamond Slope; 1989-11-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donofrio Robert Et Al → Skyview Coal Company; 1989-11-06 to current/open; source msha-controller-operator-history