# Relationship history for MSHA mine 4405228

Current hierarchy: **Kennedy Kenneth L → Nascoal Inc → Mine No 1**

- 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:** Nascoal Company Inc → Mine No 1; 1979-05-01 to 1980-06-24; source msha-controller-operator-history
- **controller_controls_mine:** West James G → Mine No 1; 1979-05-01 to 1980-06-24; source msha-controller-operator-history
- **controller_controls_operator:** West James G → Nascoal Company Inc; 1979-05-01 to 1980-06-24; source msha-controller-operator-history
- **operator_operates_mine:** High Shy Coal Company → Mine No 1; 1980-06-25 to 1981-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Sword Ricky Et Al → Mine No 1; 1980-06-25 to 1981-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Sword Ricky Et Al → High Shy Coal Company; 1980-06-25 to 1981-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Nascoal Inc → Mine No 1; 1981-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kennedy Kenneth L → Mine No 1; 1981-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kennedy Kenneth L → Nascoal Inc; 1981-06-01 to current/open; source msha-controller-operator-history