# Relationship history for MSHA mine 1509679

Current hierarchy: **Ankrom Carl → Hite Preparation Company → No G-4 Mine**

- 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

- **controller_controls_mine:** Moore Ivle → No G-4 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hite Preparation Company → No G-4 Mine; 1976-04-29 to 1980-08-06; source msha-controller-operator-history
- **controller_controls_operator:** Moore Ivle → Hite Preparation Company; 1976-04-29 to 1980-08-06; source msha-controller-operator-history
- **controller_controls_mine:** Ankrom Carl → No G-4 Mine; 1980-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hite Preparation Company → No G-4 Mine; 1980-08-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ankrom Carl → Hite Preparation Company; 1980-08-07 to current/open; source msha-controller-operator-history