# Relationship history for MSHA mine 0504213

Current hierarchy: **Randolph Elmer → Young Mining Company → Sleepy Jim Tunnel**

- 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:** Young Mining Company → Sleepy Jim Tunnel; 1987-04-01 to 1987-08-15; source msha-controller-operator-history
- **controller_controls_mine:** Young James L Sr → Sleepy Jim Tunnel; 1987-04-01 to 1987-08-15; source msha-controller-operator-history
- **controller_controls_operator:** Young James L Sr → Young Mining Company; 1987-04-01 to 1987-08-15; source msha-controller-operator-history
- **operator_operates_mine:** Young Mining Company → Sleepy Jim Tunnel; 1987-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Randolph Elmer Et Al → Sleepy Jim Tunnel; 1987-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randolph Elmer Et Al → Young Mining Company; 1987-08-16 to current/open; source msha-controller-operator-history