# Relationship history for MSHA mine 4003183

Current hierarchy: **John H  Waters → Cimbar Resources, Inc → Dyersburg 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Newpark Resources Inc → Dyersburg Plant; 1997-09-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Excalibar Minerals LLC → Dyersburg Plant; 2001-12-19 to 2022-11-30; source msha-controller-operator-history
- **controller_controls_operator:** Newpark Resources Inc → Excalibar Minerals LLC; 2001-12-19 to 2022-11-30; source msha-controller-operator-history
- **controller_controls_mine:** John H  Waters → Dyersburg Plant; 2022-09-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cimbar Resources, Inc → Dyersburg Plant; 2022-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John H  Waters → Cimbar Resources, Inc; 2022-12-01 to current/open; source msha-controller-operator-history