# Relationship history for MSHA mine 1516570

Current hierarchy: **James A  Dean → Delcoal Inc → 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 & F Coal Company → No 1; 1989-02-01 to 1990-10-11; source msha-controller-operator-history
- **controller_controls_mine:** Fuson Lloyd → No 1; 1989-02-01 to 1990-10-11; source msha-controller-operator-history
- **controller_controls_operator:** Fuson Lloyd → L & F Coal Company; 1989-02-01 to 1990-10-11; source msha-controller-operator-history
- **operator_operates_mine:** Delcoal Inc → No 1; 1990-10-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James A  Dean et al → No 1; 1990-10-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James A  Dean et al → Delcoal Inc; 1990-10-12 to current/open; source msha-controller-operator-history