# Relationship history for MSHA mine 4202239

Current hierarchy: **Douglas J  Holt; L Scott  Holt → 3-H Landscape Products LLC → PORTABLE #1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** 3-H Landscape Products LLC → PORTABLE #1; 1999-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Douglas J  Holt et al → PORTABLE #1; 1999-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas J  Holt et al → 3-H Landscape Products LLC; 1999-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** L Scott  Holt et al → 3-H Landscape Products LLC; 1999-03-01 to current/open; source msha-controller-operator-history