# Relationship history for MSHA mine 0801022

Current hierarchy: **De Soto County-Fl → De Soto County Public Works → County Shell Pit**

- 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:** De Soto County Public Works → County Shell Pit; 1984-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** De Soto County-Fl → County Shell Pit; 1984-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** De Soto County-Fl → De Soto County Public Works; 1984-10-01 to current/open; source msha-controller-operator-history