# Relationship history for MSHA mine 0103646

Current hierarchy: **William Christopher  Norton; Paul Ashley  Pemberton; Grayson Tanner  Pem → TOP ROCK LLC. → Nummy Pit**

- 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:** TOP ROCK LLC. → Nummy Pit; 2026-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William Christopher  Norton et al → Nummy Pit; 2026-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William Christopher  Norton et al → TOP ROCK LLC.; 2026-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul Ashley  Pemberton et al → TOP ROCK LLC.; 2026-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Grayson Tanner  Pemberton et al → TOP ROCK LLC.; 2026-03-18 to current/open; source msha-controller-operator-history