# Relationship history for MSHA mine 3200725

Current hierarchy: **Ryan L  Wagner → James Valley Sand & Gravel → Crusher Unit**

- 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:** Bellin Construction → Crusher Unit; 1991-08-01 to 2008-06-05; source msha-controller-operator-history
- **controller_controls_mine:** Davy  Bellin → Crusher Unit; 1991-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Davy  Bellin → Bellin Construction; 1991-08-01 to 2008-06-05; source msha-controller-operator-history
- **operator_operates_mine:** James Valley Sand & Gravel → Crusher Unit; 2008-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Davy  Bellin → Crusher Unit; 2008-06-06 to 2023-01-25; source msha-controller-operator-history
- **controller_controls_operator:** Davy  Bellin → James Valley Sand & Gravel; 2008-06-06 to 2023-01-25; source msha-controller-operator-history
- **controller_controls_mine:** Ryan L  Wagner → Crusher Unit; 2023-01-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ryan L  Wagner → James Valley Sand & Gravel; 2023-01-26 to current/open; source msha-controller-operator-history