# Relationship history for MSHA mine 4104423

Current hierarchy: **Thomas L  Durham → Danny's Service Company LTD. → Rock Crusher #1**

- 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:** Moores Rock Crushing → Rock Crusher #1; 2003-04-24 to 2004-03-08; source msha-controller-operator-history
- **controller_controls_mine:** Danny J  Moore → Rock Crusher #1; 2003-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Danny J  Moore → Moores Rock Crushing; 2003-04-24 to 2004-03-08; source msha-controller-operator-history
- **operator_operates_mine:** Danny's Service Company LTD. → Rock Crusher #1; 2004-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas L  Durham → Rock Crusher #1; 2004-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas L  Durham → Danny's Service Company LTD.; 2004-03-09 to current/open; source msha-controller-operator-history