# Relationship history for MSHA mine 1200779

Current hierarchy: **Holcim Ltd → Fidler Inc → Pit #3**

- 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:** Yoder Ready Mixed Concrete Company Inc → Pit #3; 1950-01-01 to 1983-03-20; source msha-controller-operator-history
- **controller_controls_mine:** Harold L  Atkins → Pit #3; 1950-01-01 to 1983-03-20; source msha-controller-operator-history
- **controller_controls_operator:** Harold L  Atkins → Yoder Ready Mixed Concrete Company Inc; 1950-01-01 to 1983-03-20; source msha-controller-operator-history
- **controller_controls_mine:** John L  Fiddler  et al → Pit #3; 1950-01-01 to 1992-08-11; source msha-controller-operator-history
- **operator_operates_mine:** Fidler Inc → Pit #3; 1983-03-21 to 1992-08-11; source msha-controller-operator-history
- **controller_controls_operator:** John L  Fiddler  et al → Fidler Inc; 1983-03-21 to 1992-08-11; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → Pit #3; 1989-05-23 to 2009-04-29; source msha-controller-operator-history
- **operator_operates_mine:** Fidler Inc → Pit #3; 1992-08-12 to 1995-06-11; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Fidler Inc; 1992-08-12 to 1995-06-11; source msha-controller-operator-history
- **operator_operates_mine:** Fidler Inc → Pit #3; 1995-06-12 to 2000-02-29; source msha-controller-operator-history
- **controller_controls_mine:** Nova Materials Inc → Pit #3; 1995-06-12 to 2000-02-29; source msha-controller-operator-history
- **controller_controls_operator:** Nova Materials Inc → Fidler Inc; 1995-06-12 to 2000-02-29; source msha-controller-operator-history
- **operator_operates_mine:** Fidler Inc → Pit #3; 2000-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Fidler Inc; 2000-03-01 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Pit #3; 2009-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Fidler Inc; 2009-04-30 to 1995-06-11; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Fidler Inc; 2009-04-30 to current/open; source msha-controller-operator-history