# Relationship history for MSHA mine 3402127

Current hierarchy: **Michael D  Johnson → Maranatha Stone LLC → Skinner 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:** Michael D  Johnson → Skinner Mine; 2005-01-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Maranatha Stone LLC → Skinner Mine; 2012-04-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael D  Johnson → Maranatha Stone LLC; 2012-04-19 to current/open; source msha-controller-operator-history