# Relationship history for MSHA mine 4801343

Current hierarchy: **Steve  Loftin → Menter Sand & Gravel Inc → Crusher No 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:** Menter Construction Company → Crusher No 1; 1979-01-01 to 2002-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Menter Sand & Gravel Inc → Crusher No 1; 1981-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Menter Construction Company → Menter Sand & Gravel Inc; 1981-03-01 to 2002-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Loftin → Crusher No 1; 2002-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Loftin → Menter Sand & Gravel Inc; 2002-02-01 to current/open; source msha-controller-operator-history