# Relationship history for MSHA mine 4003022

Current hierarchy: **Fischer Howard M → Energy Producers Associates Inc → Claiborne County Mine #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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Fischer Howard M → Claiborne County Mine #1; 1976-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Energy Producers Associates Inc → Claiborne County Mine #1; 1989-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fischer Howard M → Energy Producers Associates Inc; 1989-11-01 to current/open; source msha-controller-operator-history