# Relationship history for MSHA mine 1511884

Current hierarchy: **Payne Willis Bill & Bert Shanks → S & P Coal Company → No 1 Surface**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Freedom Coal Company → No 1 Surface; 1979-05-01 to 1980-06-03; source msha-controller-operator-history
- **controller_controls_mine:** Mc Daries Arthur--Paul Collier & Willis Bill Payne → No 1 Surface; 1979-05-01 to 1980-06-03; source msha-controller-operator-history
- **controller_controls_operator:** Mc Daries Arthur--Paul Collier & Willis Bill Payne → Freedom Coal Company; 1979-05-01 to 1980-06-03; source msha-controller-operator-history
- **operator_operates_mine:** S & P Coal Company → No 1 Surface; 1980-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Payne Willis Bill & Bert Shanks → No 1 Surface; 1980-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Payne Willis Bill & Bert Shanks → S & P Coal Company; 1980-06-04 to current/open; source msha-controller-operator-history