# Relationship history for MSHA mine 1800757

Current hierarchy: **Chaney Enterprises LP → Mike Davidson Sand & Gravel LLC → Councell 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

- **controller_controls_mine:** Michael P  Davidson → Councell Plant; 1996-08-01 to 2004-05-27; source msha-controller-operator-history
- **operator_operates_mine:** Mike Davidson Sand & Gravel LLC → Councell Plant; 2002-07-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael P  Davidson → Mike Davidson Sand & Gravel LLC; 2002-07-02 to 2004-05-27; source msha-controller-operator-history
- **controller_controls_mine:** Chaney Enterprises LP → Councell Plant; 2004-05-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chaney Enterprises LP → Mike Davidson Sand & Gravel LLC; 2004-05-28 to current/open; source msha-controller-operator-history