# Relationship history for MSHA mine 3608881

Current hierarchy: **Richard W  Masters; Robert A  Housel → TWIN FALLS RESOURCES LLC → BUTTERMILK**

- 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:** Geary Enterprises Concrete → BUTTERMILK; 2000-08-01 to 2022-02-08; source msha-controller-operator-history
- **controller_controls_mine:** William  Geary Sr  et al → BUTTERMILK; 2000-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Geary Sr  et al → Geary Enterprises Concrete; 2000-08-01 to 2022-02-08; source msha-controller-operator-history
- **operator_operates_mine:** Twin Falls Resources LLC → BUTTERMILK; 2022-02-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard W  Masters et al → BUTTERMILK; 2022-02-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard W  Masters et al → Twin Falls Resources LLC; 2022-02-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert A  Housel et al → Twin Falls Resources LLC; 2022-02-09 to current/open; source msha-controller-operator-history