# Relationship history for MSHA mine 2401948

Current hierarchy: **Yancy Dale  Terland → Titan Sand and Gravel LLC → Titan Wash Plant**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Conner's Concrete Inc → Titan Wash Plant; 1991-09-01 to 2026-08-28; source msha-controller-operator-history
- **controller_controls_mine:** Bonnie  Conner → Titan Wash Plant; 1991-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bonnie  Conner → Conner's Concrete Inc; 1991-09-01 to 2026-08-28; source msha-controller-operator-history
- **controller_controls_mine:** Yancy Dale  Terland → Titan Wash Plant; 2026-07-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Titan Sand and Gravel LLC → Titan Wash Plant; 2026-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Yancy Dale  Terland → Titan Sand and Gravel LLC; 2026-08-29 to current/open; source msha-controller-operator-history