# Relationship history for MSHA mine 1001352

Current hierarchy: **Industrial Construction Inc → Yanke Machine Shop Inc → Greyhound 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:** Osburn Russell → Greyhound Mine; 1950-01-01 to 1986-06-29; source msha-controller-operator-history
- **operator_operates_mine:** Greyhound Mining & Milling Inc → Greyhound Mine; 1978-03-09 to 1981-05-21; source msha-controller-operator-history
- **controller_controls_mine:** Industrial Construction Inc → Greyhound Mine; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Industrial Construction Inc → Greyhound Mining & Milling Inc; 1978-03-09 to 1981-05-21; source msha-controller-operator-history
- **operator_operates_mine:** Idaho Rand Inc → Greyhound Mine; 1981-05-22 to 1986-06-29; source msha-controller-operator-history
- **controller_controls_operator:** Osburn Russell → Idaho Rand Inc; 1981-05-22 to 1986-06-29; source msha-controller-operator-history
- **operator_operates_mine:** Yanke Machine Shop Inc → Greyhound Mine; 1986-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Industrial Construction Inc → Greyhound Mine; 1986-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Industrial Construction Inc → Yanke Machine Shop Inc; 1986-06-30 to current/open; source msha-controller-operator-history