# Relationship history for MSHA mine 4703678

Current hierarchy: **Mammoth Energy Services → Muskie Proppant LLC → US Highway 10 Sand Processing Plant**

- 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:** Muskie Proppant LLC → US Highway 10 Sand Processing Plant; 2012-12-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gulfport Energy Corporation et al → US Highway 10 Sand Processing Plant; 2012-12-12 to 2020-06-03; source msha-controller-operator-history
- **controller_controls_operator:** Gulfport Energy Corporation et al → Muskie Proppant LLC; 2012-12-12 to 2020-06-03; source msha-controller-operator-history
- **controller_controls_operator:** Wexford Capital LP et al → Muskie Proppant LLC; 2012-12-12 to 2020-06-03; source msha-controller-operator-history
- **controller_controls_mine:** Mammoth Energy Services → US Highway 10 Sand Processing Plant; 2020-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mammoth Energy Services → Muskie Proppant LLC; 2020-06-04 to current/open; source msha-controller-operator-history