# Relationship history for MSHA mine 3303684

Current hierarchy: **Rapier Daniel R → Rapier Sand & Gravel Inc → Rapier Sand & Gravel 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:** Fairfield Sand & Gravel → Rapier Sand & Gravel Incorporated; 1978-03-09 to 1993-03-17; source msha-controller-operator-history
- **controller_controls_mine:** Allen Rex & Kathy Et Al → Rapier Sand & Gravel Incorporated; 1978-03-09 to 1993-03-17; source msha-controller-operator-history
- **controller_controls_operator:** Allen Rex & Kathy Et Al → Fairfield Sand & Gravel; 1978-03-09 to 1993-03-17; source msha-controller-operator-history
- **operator_operates_mine:** Rapier Sand & Gravel Inc → Rapier Sand & Gravel Incorporated; 1993-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rapier Daniel R → Rapier Sand & Gravel Incorporated; 1993-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rapier Daniel R → Rapier Sand & Gravel Inc; 1993-03-18 to current/open; source msha-controller-operator-history