# Relationship history for MSHA mine 1508441

Current hierarchy: **Miller Charles D → Miller Robinson & Morlang Mining & Reclam Corp → No 1 Surface 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:** Miller Robinson & Morlang Mining & Reclam Corp → No 1 Surface Mine; 1975-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Miller Charles D → No 1 Surface Mine; 1975-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Miller Charles D → Miller Robinson & Morlang Mining & Reclam Corp; 1975-05-01 to current/open; source msha-controller-operator-history