# Relationship history for MSHA mine 0504394

Current hierarchy: **Harrison Pete & James Lammert → P S Mining → Rising Sun**

- 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:** W S R Mining → Rising Sun; 1989-05-01 to 1990-04-19; source msha-controller-operator-history
- **controller_controls_mine:** Shumway Dick & Mike → Rising Sun; 1989-05-01 to 1990-04-19; source msha-controller-operator-history
- **controller_controls_operator:** Shumway Dick & Mike → W S R Mining; 1989-05-01 to 1990-04-19; source msha-controller-operator-history
- **operator_operates_mine:** P S Mining → Rising Sun; 1990-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Harrison Pete & James Lammert → Rising Sun; 1990-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harrison Pete & James Lammert → P S Mining; 1990-04-20 to current/open; source msha-controller-operator-history