# Relationship history for MSHA mine 1510984

Current hierarchy: **Jones Harold Gregory → Cynthia Ann Coal Company Inc → No 5 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

- **operator_operates_mine:** Salyer Coal Company → No 5 Mine; 1977-12-01 to 1980-02-13; source msha-controller-operator-history
- **controller_controls_mine:** Salyer William D-Dennis Ray & Elmo → No 5 Mine; 1977-12-01 to 1980-02-13; source msha-controller-operator-history
- **controller_controls_operator:** Salyer William D-Dennis Ray & Elmo → Salyer Coal Company; 1977-12-01 to 1980-02-13; source msha-controller-operator-history
- **controller_controls_mine:** Jones Harold Gregory → No 5 Mine; 1979-04-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Salyer Coal Company → No 5 Mine; 1980-02-14 to 1980-03-23; source msha-controller-operator-history
- **controller_controls_mine:** Salyer Henry E → No 5 Mine; 1980-02-14 to 1980-03-23; source msha-controller-operator-history
- **controller_controls_operator:** Salyer Henry E → Salyer Coal Company; 1980-02-14 to 1980-03-23; source msha-controller-operator-history
- **operator_operates_mine:** S U C O Inc → No 5 Mine; 1980-03-24 to 1980-09-15; source msha-controller-operator-history
- **controller_controls_mine:** Michael  McClure → No 5 Mine; 1980-03-24 to 1980-09-15; source msha-controller-operator-history
- **controller_controls_operator:** Michael  McClure → S U C O Inc; 1980-03-24 to 1980-09-15; source msha-controller-operator-history
- **operator_operates_mine:** Cynthia Ann Coal Company Inc → No 5 Mine; 1980-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jones Harold Gregory → Cynthia Ann Coal Company Inc; 1980-09-16 to current/open; source msha-controller-operator-history