# Relationship history for MSHA mine 1510151

Current hierarchy: **Mc Nulty Charley → H & M Trucking Company → Tipple**

- 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:** M E C Inc → Tipple; 1977-02-01 to 1986-04-08; source msha-controller-operator-history
- **controller_controls_mine:** Childers Margaret E & Jack → Tipple; 1977-02-01 to 1986-04-08; source msha-controller-operator-history
- **controller_controls_operator:** Childers Margaret E & Jack → M E C Inc; 1977-02-01 to 1986-04-08; source msha-controller-operator-history
- **operator_operates_mine:** H & M Trucking Company → Tipple; 1986-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Nulty Charley → Tipple; 1986-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Nulty Charley → H & M Trucking Company; 1986-04-09 to current/open; source msha-controller-operator-history