# Relationship history for MSHA mine 1507417

Current hierarchy: **Hindes Peter C → Clair Brothers Inc → 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** S K P Development Co → No 1 Surface Mine; 1974-10-01 to 1975-07-03; source msha-controller-operator-history
- **controller_controls_mine:** S K P Development Co → No 1 Surface Mine; 1974-10-01 to 1975-07-03; source msha-controller-operator-history
- **controller_controls_operator:** S K P Development Co → S K P Development Co; 1974-10-01 to 1975-07-03; source msha-controller-operator-history
- **operator_operates_mine:** Clair Brothers Inc → No 1 Surface Mine; 1975-07-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hindes Peter C → No 1 Surface Mine; 1975-07-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hindes Peter C → Clair Brothers Inc; 1975-07-04 to current/open; source msha-controller-operator-history