# Relationship history for MSHA mine 5100268

Current hierarchy: **Darryl  Leer → Tri-L Construction, Inc., Q.D. → Manawainui Quarry**

- 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:** Tri-L Construction, Inc., Q.D. → Manawainui Quarry; 2006-02-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Darryl  Leer → Manawainui Quarry; 2006-02-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darryl  Leer → Tri-L Construction, Inc., Q.D.; 2006-02-09 to current/open; source msha-controller-operator-history