# Relationship history for MSHA mine 4101482

Current hierarchy: **Cummings Point Industries → Premier Services Corp → Premier Services Corporation**

- 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:** Oglebay Norton Company → Premier Services Corporation; 1950-01-01 to 1996-04-03; source msha-controller-operator-history
- **controller_controls_mine:** Oglebay Norton Company → Premier Services Corporation; 1950-01-01 to 1996-04-03; source msha-controller-operator-history
- **controller_controls_operator:** Oglebay Norton Company → Oglebay Norton Company; 1950-01-01 to 1996-04-03; source msha-controller-operator-history
- **controller_controls_mine:** Cummings Point Industries → Premier Services Corporation; 1991-06-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Premier Services Corp → Premier Services Corporation; 1996-04-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cummings Point Industries → Premier Services Corp; 1996-04-04 to current/open; source msha-controller-operator-history