# Relationship history for MSHA mine 1700652

Current hierarchy: **Lisa  Parker; Troy  Parker → Litro Corp → SOUTHERN MAINE NURSERY**

- 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:** Litro Corp → SOUTHERN MAINE NURSERY; 1999-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lisa  Parker et al → SOUTHERN MAINE NURSERY; 1999-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lisa  Parker et al → Litro Corp; 1999-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Troy  Parker et al → Litro Corp; 1999-06-01 to current/open; source msha-controller-operator-history