# Relationship history for MSHA mine 3605495

Current hierarchy: **Alfred J  Brown → S B M Coal → M And R 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:** Donald R  Rebuck → M And R Slope; 1975-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** M & R Coal Company → M And R Slope; 1975-03-11 to 1985-05-01; source msha-controller-operator-history
- **controller_controls_operator:** Donald R  Rebuck → M & R Coal Company; 1975-03-11 to 1985-05-01; source msha-controller-operator-history
- **controller_controls_mine:** Snyder Dennis Et Al → M And R Slope; 1977-04-01 to 1988-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Rebuck Donald R Sr Et Al → M And R Slope; 1984-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** A & D Coal Company → M And R Slope; 1985-05-02 to 1986-01-16; source msha-controller-operator-history
- **controller_controls_operator:** Rebuck Donald R Sr Et Al → A & D Coal Company; 1985-05-02 to 1986-01-16; source msha-controller-operator-history
- **controller_controls_mine:** Alfred J  Brown → M And R Slope; 1985-07-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Snyder Coal Company → M And R Slope; 1986-01-17 to 1988-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Snyder Dennis Et Al → Snyder Coal Company; 1986-01-17 to 1988-10-31; source msha-controller-operator-history
- **operator_operates_mine:** S B M Coal → M And R Slope; 1988-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alfred J  Brown → S B M Coal; 1988-11-01 to current/open; source msha-controller-operator-history