# Relationship history for MSHA mine 4104817

Current hierarchy: **Billy M McCraw; Patsy J Jordan; Joel W Jordan → Erna Sands LLC → Erna Sands LLC**

- 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:** Erna Frac Sand, L.C. → Erna Sands LLC; 2010-03-30 to 2022-09-13; source msha-controller-operator-history
- **controller_controls_mine:** Casey Sand Ventures LLC et al → Erna Sands LLC; 2010-03-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Casey Sand Ventures LLC et al → Erna Frac Sand, L.C.; 2010-03-30 to 2022-09-13; source msha-controller-operator-history
- **controller_controls_operator:** Erna Sand Ventures LC et al → Erna Frac Sand, L.C.; 2010-03-30 to 2022-09-13; source msha-controller-operator-history
- **operator_operates_mine:** Erna Sands LLC → Erna Sands LLC; 2022-09-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joel W Jordan et al → Erna Sands LLC; 2022-09-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joel W Jordan et al → Erna Sands LLC; 2022-09-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patsy J Jordan et al → Erna Sands LLC; 2022-09-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Billy M McCraw et al → Erna Sands LLC; 2022-09-14 to current/open; source msha-controller-operator-history