# Relationship history for MSHA mine 2402438

Current hierarchy: **Todd  Appel; Patrick  Sameulson → Mitchells Oilfield Service Redi-Mix Division → Mehling Pit**

- 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:** Fallon County Redi Mix → Mehling Pit; 2006-03-06 to 2012-08-28; source msha-controller-operator-history
- **controller_controls_mine:** Viola  Mitchell et al → Mehling Pit; 2006-03-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Viola  Mitchell et al → Fallon County Redi Mix; 2006-03-06 to 2012-08-28; source msha-controller-operator-history
- **controller_controls_operator:** Everett  Mitchell et al → Fallon County Redi Mix; 2006-03-06 to 2012-08-28; source msha-controller-operator-history
- **operator_operates_mine:** Mitchells Oilfield Service Redi-Mix Division → Mehling Pit; 2012-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Patrick  Sameulson et al → Mehling Pit; 2012-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patrick  Sameulson et al → Mitchells Oilfield Service Redi-Mix Division; 2012-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Todd  Appel et al → Mitchells Oilfield Service Redi-Mix Division; 2012-08-29 to current/open; source msha-controller-operator-history