# Relationship history for MSHA mine 2302276

Current hierarchy: **Junior (Orval) L  Curtis → J. C. Rip Rap Company → J. C. Rip Rap Company**

- 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:** Wellman/Johnson Quarry → J. C. Rip Rap Company; 2002-11-26 to 2003-09-16; source msha-controller-operator-history
- **controller_controls_mine:** Junior (Orval) L  Curtis → J. C. Rip Rap Company; 2002-11-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Junior (Orval) L  Curtis → Wellman/Johnson Quarry; 2002-11-26 to 2003-09-16; source msha-controller-operator-history
- **operator_operates_mine:** Branco Sand & Gravel → J. C. Rip Rap Company; 2003-09-17 to 2004-12-03; source msha-controller-operator-history
- **controller_controls_mine:** Rick  Branson  et al → J. C. Rip Rap Company; 2003-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick  Branson  et al → Branco Sand & Gravel; 2003-09-17 to 2004-12-03; source msha-controller-operator-history
- **controller_controls_operator:** Ralph  Coffelt  et al → Branco Sand & Gravel; 2003-09-17 to 2004-12-03; source msha-controller-operator-history
- **operator_operates_mine:** J. C. Rip Rap Company → J. C. Rip Rap Company; 2004-12-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Junior (Orval) L  Curtis → J. C. Rip Rap Company; 2004-12-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Junior (Orval) L  Curtis → J. C. Rip Rap Company; 2004-12-04 to current/open; source msha-controller-operator-history