# Relationship history for MSHA mine 4200410

Current hierarchy: **CRH PLC → Staker & Parson Companies → Beck Street South**

- 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 → Beck Street South; 1950-01-01 to 1994-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Wel-Com Financial Services & M-K Holding Corp → Beck Street South; 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 1994-12-31; source msha-controller-operator-history
- **controller_controls_mine:** U S Aggregate Inc → Beck Street South; 1986-06-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Monroc Inc → Beck Street South; 1995-01-01 to 2001-03-31; source msha-controller-operator-history
- **controller_controls_operator:** U S Aggregate Inc → Monroc Inc; 1995-01-01 to 2001-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Oldcastle Mmg Inc → Beck Street South; 2001-04-01 to 2002-12-12; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Beck Street South; 2001-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Oldcastle Mmg Inc; 2001-04-01 to 2002-12-12; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Beck Street South; 2002-05-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Staker & Parson Companies → Beck Street South; 2002-12-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Staker & Parson Companies; 2002-12-13 to current/open; source msha-controller-operator-history