# Relationship history for MSHA mine 2402570

Current hierarchy: **Jacob D Cremer → Perma Stone Inc → Skookum**

- 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:** Jacob D Cremer → Skookum; 2001-09-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Montana Statewide Stone Inc. → Skookum; 2010-05-17 to 2026-07-30; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Shiesl → Skookum; 2010-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Shiesl → Montana Statewide Stone Inc.; 2010-05-17 to 2026-07-30; source msha-controller-operator-history
- **operator_operates_mine:** Perma Stone Inc → Skookum; 2026-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jacob D Cremer → Perma Stone Inc; 2026-07-31 to current/open; source msha-controller-operator-history