# Relationship history for MSHA mine 4002861

Current hierarchy: **Cox Franklin → Fork Mountain Mining Company → 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:** L & L Coal Company Inc → No 1; 1984-09-01 to 1985-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Daugherty Leona Et Al → No 1; 1984-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daugherty Leona Et Al → L & L Coal Company Inc; 1984-09-01 to 1985-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Fork Mountain Mining Company → No 1; 1985-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cox Franklin → No 1; 1985-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cox Franklin → Fork Mountain Mining Company; 1985-10-01 to current/open; source msha-controller-operator-history