# Relationship history for MSHA mine 1700456

Current hierarchy: **James  Hinman → Blue Rock Industries → Wing Hill 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:** James  Hinman → Wing Hill Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Industrial Garnet Extractives Inc → Wing Hill Mine; 1978-03-09 to 1981-10-06; source msha-controller-operator-history
- **controller_controls_mine:** O'Connor Michael P → Wing Hill Mine; 1978-03-09 to 1987-01-12; source msha-controller-operator-history
- **controller_controls_operator:** O'Connor Michael P → Industrial Garnet Extractives Inc; 1978-03-09 to 1981-10-06; source msha-controller-operator-history
- **operator_operates_mine:** Blue Rock Industries → Wing Hill Mine; 1981-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Hinman → Blue Rock Industries; 1981-10-07 to current/open; source msha-controller-operator-history