# Relationship history for MSHA mine 1000740

Current hierarchy: **CRH PLC → Idaho Materials & Construction → Eagle Pit**

- 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:** Monroc Inc → Eagle Pit; 1950-01-01 to 1978-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Wel-Com Financial Services & M-K Holding Corp → Eagle Pit; 1950-01-01 to 2000-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Wel-Com Financial Services & M-K Holding Corp → Monroc Inc; 1950-01-01 to 1978-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Floyd A  Patterson → Eagle Pit; 1950-01-01 to 1988-07-07; source msha-controller-operator-history
- **operator_operates_mine:** Masterpiece Corp Inc → Eagle Pit; 1978-09-01 to 1979-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Floyd A  Patterson → Masterpiece Corp Inc; 1978-09-01 to 1979-09-30; source msha-controller-operator-history
- **controller_controls_mine:** C D  Tarter  et al → Eagle Pit; 1979-03-20 to 1980-12-31; source msha-controller-operator-history
- **operator_operates_mine:** R & T Construction → Eagle Pit; 1979-10-01 to 1980-12-31; source msha-controller-operator-history
- **controller_controls_operator:** C D  Tarter  et al → R & T Construction; 1979-10-01 to 1980-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Monroc Inc → Eagle Pit; 1981-01-01 to 1994-09-11; source msha-controller-operator-history
- **controller_controls_operator:** Wel-Com Financial Services & M-K Holding Corp → Monroc Inc; 1981-01-01 to 1994-09-11; source msha-controller-operator-history
- **controller_controls_mine:** U S Aggregate Inc → Eagle Pit; 1986-06-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Monroc Inc → Eagle Pit; 1994-09-12 to 2002-02-05; source msha-controller-operator-history
- **controller_controls_operator:** U S Aggregate Inc → Monroc Inc; 1994-09-12 to 2002-02-05; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Eagle Pit; 2000-03-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Idaho Materials & Construction → Eagle Pit; 2002-02-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Idaho Materials & Construction; 2002-02-06 to current/open; source msha-controller-operator-history