# Relationship history for MSHA mine 1302465

Current hierarchy: **Brady J Murphy → Murphy Heavy Contracting Corp → Murphy portable #1**

- 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:** Murphy Heavy Contracting Corp → Murphy portable #1; 2017-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Duane  Murphy → Murphy portable #1; 2017-06-13 to 2026-07-06; source msha-controller-operator-history
- **controller_controls_operator:** Duane  Murphy → Murphy Heavy Contracting Corp; 2017-06-13 to 2026-07-06; source msha-controller-operator-history
- **controller_controls_mine:** Brady J Murphy → Murphy portable #1; 2026-07-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brady J Murphy → Murphy Heavy Contracting Corp; 2026-07-07 to current/open; source msha-controller-operator-history