# Relationship history for MSHA mine 1100055

Current hierarchy: **Breedon Group PLC → Falling Springs Quarry Company → FALLING SPRINGS QUARRY**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** General Dynamics Corp → FALLING SPRINGS QUARRY; 1950-01-01 to 2006-06-15; source msha-controller-operator-history
- **operator_operates_mine:** East St Louis Stone Company → FALLING SPRINGS QUARRY; 1950-01-01 to 1981-10-26; source msha-controller-operator-history
- **controller_controls_mine:** Edwin A  Mc Lean → FALLING SPRINGS QUARRY; 1950-01-01 to 1981-10-26; source msha-controller-operator-history
- **controller_controls_operator:** Edwin A  Mc Lean → East St Louis Stone Company; 1950-01-01 to 1981-10-26; source msha-controller-operator-history
- **operator_operates_mine:** Material Service Corp → FALLING SPRINGS QUARRY; 1981-10-27 to 1987-03-24; source msha-controller-operator-history
- **controller_controls_operator:** General Dynamics Corp → Material Service Corp; 1981-10-27 to 1987-03-24; source msha-controller-operator-history
- **operator_operates_mine:** Falling Springs Quarry Company → FALLING SPRINGS QUARRY; 1987-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John E  Cramer → FALLING SPRINGS QUARRY; 1987-03-25 to 2016-09-06; source msha-controller-operator-history
- **controller_controls_operator:** John E  Cramer → Falling Springs Quarry Company; 1987-03-25 to 2016-09-06; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → FALLING SPRINGS QUARRY; 2006-06-16 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Material Service Corp; 2006-06-16 to 1987-03-24; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → FALLING SPRINGS QUARRY; 2007-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Material Service Corp; 2007-08-23 to 1987-03-24; source msha-controller-operator-history
- **controller_controls_mine:** Katherine A Cramer → FALLING SPRINGS QUARRY; 2016-09-07 to 2023-02-20; source msha-controller-operator-history
- **controller_controls_operator:** Katherine A Cramer → Falling Springs Quarry Company; 2016-09-07 to 2023-02-20; source msha-controller-operator-history
- **controller_controls_operator:** Charles J Cramer → Falling Springs Quarry Company; 2016-09-07 to 2023-02-20; source msha-controller-operator-history
- **controller_controls_operator:** William H Guhman → Falling Springs Quarry Company; 2016-09-07 to 2023-02-20; source msha-controller-operator-history
- **controller_controls_mine:** (Katharine) Anne  Cramer → FALLING SPRINGS QUARRY; 2023-02-21 to 2026-05-29; source msha-controller-operator-history
- **controller_controls_operator:** (Katharine) Anne  Cramer → Falling Springs Quarry Company; 2023-02-21 to 2026-05-29; source msha-controller-operator-history
- **controller_controls_mine:** Breedon Group PLC → FALLING SPRINGS QUARRY; 2026-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Breedon Group PLC → Falling Springs Quarry Company; 2026-05-30 to current/open; source msha-controller-operator-history