# Relationship history for MSHA mine 1100211

Current hierarchy: **(Katharine) Anne  Cramer → Casper Stolle Quarry & Contracting Co → Casper Stolle Quarry & Contracting Co**

- 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:** Casper Stolle Quarry & Contracting Co → Casper Stolle Quarry & Contracting Co; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John E  Cramer → Casper Stolle Quarry & Contracting Co; 1950-01-01 to 2016-09-06; source msha-controller-operator-history
- **controller_controls_operator:** John E  Cramer → Casper Stolle Quarry & Contracting Co; 1950-01-01 to 2016-09-06; source msha-controller-operator-history
- **controller_controls_mine:** Charles J Cramer → Casper Stolle Quarry & Contracting Co; 2016-09-07 to 2023-02-20; source msha-controller-operator-history
- **controller_controls_operator:** Charles J Cramer → Casper Stolle Quarry & Contracting Co; 2016-09-07 to 2023-02-20; source msha-controller-operator-history
- **controller_controls_operator:** Katherine A Cramer → Casper Stolle Quarry & Contracting Co; 2016-09-07 to 2023-02-20; source msha-controller-operator-history
- **controller_controls_operator:** William H Guhman → Casper Stolle Quarry & Contracting Co; 2016-09-07 to 2023-02-20; source msha-controller-operator-history
- **controller_controls_mine:** (Katharine) Anne  Cramer → Casper Stolle Quarry & Contracting Co; 2023-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** (Katharine) Anne  Cramer → Casper Stolle Quarry & Contracting Co; 2023-02-21 to current/open; source msha-controller-operator-history