# Relationship history for MSHA mine 1510396

Current hierarchy: **Johns Barry → Wilgar Land Company → No 3**

- 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:** Anita Coal Company → No 3; 1977-04-01 to 1986-04-28; source msha-controller-operator-history
- **controller_controls_mine:** Kiser Jarvey & Herbert → No 3; 1977-04-01 to 1986-04-28; source msha-controller-operator-history
- **controller_controls_operator:** Kiser Jarvey & Herbert → Anita Coal Company; 1977-04-01 to 1986-04-28; source msha-controller-operator-history
- **controller_controls_mine:** Johns Barry Et Al → No 3; 1984-06-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wilgar Land Company → No 3; 1986-04-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Johns Barry Et Al → Wilgar Land Company; 1986-04-29 to current/open; source msha-controller-operator-history