# Relationship history for MSHA mine 3303950

Current hierarchy: **Daniel O  Miller → Sugarcreek Clay & Limestone Inc → Sugarcreek Clay & Limestone Incorporated**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Sugarcreek Clay & Limestone → Sugarcreek Clay & Limestone Incorporated; 1983-09-01 to 1988-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Wenger Leonard → Sugarcreek Clay & Limestone Incorporated; 1983-09-01 to 1988-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Wenger Leonard → Sugarcreek Clay & Limestone; 1983-09-01 to 1988-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Sugarcreek Clay & Limestone Inc → Sugarcreek Clay & Limestone Incorporated; 1988-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Daniel O  Miller → Sugarcreek Clay & Limestone Incorporated; 1988-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel O  Miller → Sugarcreek Clay & Limestone Inc; 1988-05-01 to current/open; source msha-controller-operator-history