# Relationship history for MSHA mine 1700123

Current hierarchy: **CRH PLC → Pike Industries, Inc. → Cumberland Sand & Gravel C626**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Blue Rock Industries → Cumberland Sand & Gravel C626; 1950-01-01 to 2006-01-16; source msha-controller-operator-history
- **controller_controls_mine:** James  Hinman → Cumberland Sand & Gravel C626; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Hinman → Blue Rock Industries; 1950-01-01 to 2006-01-16; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Cumberland Sand & Gravel C626; 1988-06-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pike Industries, Inc. → Cumberland Sand & Gravel C626; 2006-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Pike Industries, Inc.; 2006-01-17 to current/open; source msha-controller-operator-history