# Relationship history for MSHA mine 4202178

Current hierarchy: **Douglas  Pickett; David  Pickett; Patricia  Pickett → Holt Basin Stone LLC → LYNN PASS 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:** Todd Erickson Stone → LYNN PASS QUARRY; 1997-05-01 to 2025-05-08; source msha-controller-operator-history
- **controller_controls_mine:** Todd  Erickson → LYNN PASS QUARRY; 1997-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Todd  Erickson → Todd Erickson Stone; 1997-05-01 to 2025-05-08; source msha-controller-operator-history
- **operator_operates_mine:** Holt Basin Stone LLC → LYNN PASS QUARRY; 2025-05-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Douglas  Pickett et al → LYNN PASS QUARRY; 2025-05-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas  Pickett et al → Holt Basin Stone LLC; 2025-05-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patricia  Pickett et al → Holt Basin Stone LLC; 2025-05-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Pickett et al → Holt Basin Stone LLC; 2025-05-09 to current/open; source msha-controller-operator-history