# Relationship history for MSHA mine 2003004

Current hierarchy: **CRH PLC → T M Development → T.M. DEVELOPMENT**

- 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

- **controller_controls_mine:** Robert M  Thompson → T.M. DEVELOPMENT; 1980-08-01 to 1999-07-07; source msha-controller-operator-history
- **operator_operates_mine:** T M Development Llc → T.M. DEVELOPMENT; 1997-04-01 to 1999-07-07; source msha-controller-operator-history
- **controller_controls_operator:** Robert M  Thompson → T M Development Llc; 1997-04-01 to 1999-07-07; source msha-controller-operator-history
- **operator_operates_mine:** T M Development → T.M. DEVELOPMENT; 1999-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → T.M. DEVELOPMENT; 1999-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → T M Development; 1999-07-08 to current/open; source msha-controller-operator-history