# Relationship history for MSHA mine 1513037

Current hierarchy: **Moore Bill → Casun Coal Company → No 1 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:** Pinemark Inc → No 1 Tipple; 1981-08-01 to 1981-11-29; source msha-controller-operator-history
- **controller_controls_mine:** Sasser Glenn → No 1 Tipple; 1981-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sasser Glenn → Pinemark Inc; 1981-08-01 to 1981-11-29; source msha-controller-operator-history
- **operator_operates_mine:** Casun Coal Company → No 1 Tipple; 1981-11-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Moore Bill → No 1 Tipple; 1981-11-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Moore Bill → Casun Coal Company; 1981-11-30 to current/open; source msha-controller-operator-history