# Relationship history for MSHA mine 4501100

Current hierarchy: **Stacey Jerry → General Mine Services Corp → Shumaker Mine**

- 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:** Tri-Nite Mining Company → Shumaker Mine; 1950-01-01 to 1989-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Tri-Nite Mining Company → Shumaker Mine; 1950-01-01 to 1989-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Tri-Nite Mining Company → Tri-Nite Mining Company; 1950-01-01 to 1989-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Stacey Jerry → Shumaker Mine; 1984-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** General Mine Services Corp → Shumaker Mine; 1989-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stacey Jerry → General Mine Services Corp; 1989-05-01 to current/open; source msha-controller-operator-history