# Relationship history for MSHA mine 0203423

Current hierarchy: **Triton Development LLC; Lock/Ryder LLC → Henrietta Mine, LLC → Henrietta Mine**

- 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:** Henrietta Mine, LLC → Henrietta Mine; 2019-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lock/Ryder LLC et al → Henrietta Mine; 2019-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lock/Ryder LLC et al → Henrietta Mine, LLC; 2019-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Triton Development LLC et al → Henrietta Mine, LLC; 2019-12-19 to current/open; source msha-controller-operator-history