# Relationship history for MSHA mine 1516341

Current hierarchy: **Fuson Lenvil & Wendill → L & F Coal → 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:** Roark Coal & Leasing Inc → No 1; 1988-03-01 to 1988-09-11; source msha-controller-operator-history
- **controller_controls_mine:** Roark Larry → No 1; 1988-03-01 to 1988-09-11; source msha-controller-operator-history
- **controller_controls_operator:** Roark Larry → Roark Coal & Leasing Inc; 1988-03-01 to 1988-09-11; source msha-controller-operator-history
- **operator_operates_mine:** L & F Coal → No 1; 1988-09-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fuson Lenvil & Wendill Et Al → No 1; 1988-09-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fuson Lenvil & Wendill Et Al → L & F Coal; 1988-09-12 to current/open; source msha-controller-operator-history