# Relationship history for MSHA mine 3003504

Current hierarchy: **John (Jack) L  Potter → JOPO GRAVEL LLC → POTTER 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:** JOPO FARMS → POTTER PIT; 2005-08-01 to 2020-12-31; source msha-controller-operator-history
- **controller_controls_mine:** John (Jack) L  Potter → POTTER PIT; 2005-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John (Jack) L  Potter → JOPO FARMS; 2005-08-01 to 2020-12-31; source msha-controller-operator-history
- **operator_operates_mine:** JOPO GRAVEL LLC → POTTER PIT; 2021-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John (Jack) L  Potter → POTTER PIT; 2021-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John (Jack) L  Potter → JOPO GRAVEL LLC; 2021-01-01 to current/open; source msha-controller-operator-history