# Relationship history for MSHA mine 1002137

Current hierarchy: **Mike K.  Bolopue → Mikes Rock Pit & Snow Removal → Mikes Rock Pit & Snow Removal**

- 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:** Mikes Rock Pit & Snow Removal → Mikes Rock Pit & Snow Removal; 2007-09-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mike K.  Bolopue → Mikes Rock Pit & Snow Removal; 2007-09-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike K.  Bolopue → Mikes Rock Pit & Snow Removal; 2007-09-19 to current/open; source msha-controller-operator-history