# Relationship history for MSHA mine 2002988

Current hierarchy: **Paul  Land; Dan  Hibma → Prdl Llc → BYRON SAND**

- 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:** Prdl Llc → BYRON SAND; 1996-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dan  Hibma et al → BYRON SAND; 1996-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dan  Hibma et al → Prdl Llc; 1996-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Land et al → Prdl Llc; 1996-05-01 to current/open; source msha-controller-operator-history