# Relationship history for MSHA mine 4604832

Current hierarchy: **Bramer Dick → Nada Coal Company → Rocky Road Company #1 Strip**

- 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:** Bramer Dick → Rocky Road Company #1 Strip; 1974-03-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rocky Road Coal Company Inc → Rocky Road Company #1 Strip; 1975-10-20 to 1977-05-15; source msha-controller-operator-history
- **controller_controls_mine:** Mosesso John A → Rocky Road Company #1 Strip; 1975-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mosesso John A → Rocky Road Coal Company Inc; 1975-10-20 to 1977-05-15; source msha-controller-operator-history
- **operator_operates_mine:** Nada Coal Company → Rocky Road Company #1 Strip; 1977-05-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bramer Dick → Nada Coal Company; 1977-05-16 to current/open; source msha-controller-operator-history