# Relationship history for MSHA mine 4402385

Current hierarchy: **Titan America S A → D M Conner Inc → D M Conner Sand Co**

- 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:** D M Conner Inc → D M Conner Sand Co; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** D M  Conner  et al → D M Conner Sand Co; 1950-01-01 to 2015-06-28; source msha-controller-operator-history
- **controller_controls_operator:** D M  Conner  et al → D M Conner Inc; 1950-01-01 to 2015-06-28; source msha-controller-operator-history
- **controller_controls_mine:** Benton M  Conner et al → D M Conner Sand Co; 2015-06-29 to 2024-10-19; source msha-controller-operator-history
- **controller_controls_operator:** Benton M  Conner et al → D M Conner Inc; 2015-06-29 to 2024-10-19; source msha-controller-operator-history
- **controller_controls_operator:** Debra C  Henderson et al → D M Conner Inc; 2015-06-29 to 2024-10-19; source msha-controller-operator-history
- **controller_controls_mine:** Titan America S A → D M Conner Sand Co; 2024-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Titan America S A → D M Conner Inc; 2024-10-20 to current/open; source msha-controller-operator-history