# Relationship history for MSHA mine 4400382

Current hierarchy: **Kenneth L  Stacy → Sequoyah Resources Inc → No 1 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:** Black Diamond Fuel Company → No 1 Mine; 1950-01-01 to 1986-09-15; source msha-controller-operator-history
- **controller_controls_mine:** Fields Resources Inc → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fields Resources Inc → Black Diamond Fuel Company; 1950-01-01 to 1986-09-15; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth L  Stacy → No 1 Mine; 1986-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sequoyah Resources Inc → No 1 Mine; 1986-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth L  Stacy → Sequoyah Resources Inc; 1986-09-16 to current/open; source msha-controller-operator-history