# Relationship history for MSHA mine 0501726

Current hierarchy: **Shumway Gary → Gary Shumway → Lp-8**

- 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:** Union Carbide Corp → Lp-8; 1950-01-01 to 1988-02-07; source msha-controller-operator-history
- **controller_controls_mine:** Union Carbide Corp → Lp-8; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Union Carbide Corp → Union Carbide Corp; 1950-01-01 to 1988-02-07; source msha-controller-operator-history
- **operator_operates_mine:** Nelson Mining Inc → Lp-8; 1988-02-08 to 1990-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Nelson Joe → Lp-8; 1988-02-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nelson Joe → Nelson Mining Inc; 1988-02-08 to 1990-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Shumway Gary → Lp-8; 1990-07-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gary Shumway → Lp-8; 1990-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shumway Gary → Gary Shumway; 1990-10-01 to current/open; source msha-controller-operator-history