# Relationship history for MSHA mine 3605446

Current hierarchy: **Bowers Raymond → Hard Times Coal Company Inc → R B 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 → R B Slope; 1974-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sky View Coal Company → R B Slope; 1975-02-11 to 1976-08-29; source msha-controller-operator-history
- **controller_controls_operator:** Glosek Edward Et Al → Sky View Coal Company; 1975-02-11 to 1976-08-29; source msha-controller-operator-history
- **operator_operates_mine:** Skyview Coal Company → R B Slope; 1976-08-30 to 1979-02-11; source msha-controller-operator-history
- **controller_controls_mine:** Myers Lee & Garry Rebuck → R B Slope; 1976-08-30 to 1979-02-11; source msha-controller-operator-history
- **controller_controls_operator:** Myers Lee & Garry Rebuck → Skyview Coal Company; 1976-08-30 to 1979-02-11; source msha-controller-operator-history
- **operator_operates_mine:** Chestnut Coal Company → R B Slope; 1979-02-12 to 1982-09-26; source msha-controller-operator-history
- **controller_controls_mine:** Shingara Robert R → R B Slope; 1979-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shingara Robert R → Chestnut Coal Company; 1979-02-12 to 1982-09-26; source msha-controller-operator-history
- **operator_operates_mine:** Hard Times Coal Company → R B Slope; 1982-09-27 to 1983-03-23; source msha-controller-operator-history
- **controller_controls_mine:** Ricky G  Derck et al → R B Slope; 1982-09-27 to 1983-03-23; source msha-controller-operator-history
- **controller_controls_operator:** Ricky G  Derck et al → Hard Times Coal Company; 1982-09-27 to 1983-03-23; source msha-controller-operator-history
- **operator_operates_mine:** Hard Times Coal Company Inc → R B Slope; 1983-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bowers Raymond → R B Slope; 1983-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bowers Raymond → Hard Times Coal Company Inc; 1983-03-24 to current/open; source msha-controller-operator-history