# Relationship history for MSHA mine 2601537

Current hierarchy: **Mc Millan Patrick S & Paul A Ramsey → Padden-Gray Mining Company → Padden 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:** Big Delta Refinery Inc → Padden Mine; 1979-01-01 to 1979-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Big Delta Refinery Inc → Padden Mine; 1979-01-01 to 1979-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Big Delta Refinery Inc → Big Delta Refinery Inc; 1979-01-01 to 1979-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Padden-Gray Mining Company → Padden Mine; 1980-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Millan Patrick S & Paul A Ramsey → Padden Mine; 1980-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Millan Patrick S & Paul A Ramsey → Padden-Gray Mining Company; 1980-01-01 to current/open; source msha-controller-operator-history