# Relationship history for MSHA mine 1800737

Current hierarchy: **Chaney Enterprises LP → Chaney Enterprises LTD Partnership → Chaney Enterprises**

- 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:** Chaney Enterprises LP → Chaney Enterprises; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Southern Materials Inc → Chaney Enterprises; 1996-08-01 to 2001-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Joseph D  Knott → Chaney Enterprises; 1996-08-01 to 2001-04-06; source msha-controller-operator-history
- **controller_controls_operator:** Joseph D  Knott → Southern Materials Inc; 1996-08-01 to 2001-04-06; source msha-controller-operator-history
- **operator_operates_mine:** Chaney Enterprises LTD Partnership → Chaney Enterprises; 2001-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chaney Enterprises LP → Chaney Enterprises LTD Partnership; 2001-04-07 to current/open; source msha-controller-operator-history