# Relationship history for MSHA mine 3607263

Current hierarchy: **Micheal Jennifer → Susan Ann Coal Company Inc → Susan Ann Strip**

- 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:** Susan Ann Coal Inc → Susan Ann Strip; 1982-01-01 to 1990-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Stromick Joseph → Susan Ann Strip; 1982-01-01 to 1990-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Stromick Joseph → Susan Ann Coal Inc; 1982-01-01 to 1990-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Susan Ann Coal Company Inc → Susan Ann Strip; 1990-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Micheal Jennifer → Susan Ann Strip; 1990-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Micheal Jennifer → Susan Ann Coal Company Inc; 1990-04-01 to current/open; source msha-controller-operator-history