# Relationship history for MSHA mine 1514155

Current hierarchy: **Hayes Steve & Scott Miller → S & D Coal → No 1 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

- **controller_controls_mine:** Daniel Roger D → No 1 Mine; 1982-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mingo Coal Company Inc → No 1 Mine; 1983-08-01 to 1988-01-24; source msha-controller-operator-history
- **controller_controls_operator:** Daniel Roger D → Mingo Coal Company Inc; 1983-08-01 to 1988-01-24; source msha-controller-operator-history
- **operator_operates_mine:** S & D Coal → No 1 Mine; 1988-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hayes Steve & Scott Miller → No 1 Mine; 1988-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hayes Steve & Scott Miller → S & D Coal; 1988-01-25 to current/open; source msha-controller-operator-history