# Relationship history for MSHA mine 3609710

Current hierarchy: **Christian K  Kauffman → C & M Coal Company LLC → No 1 Strip**

- 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:** Fort Jackson Logging → No 1 Strip; 2009-03-03 to 2009-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Christian K  Kauffman → No 1 Strip; 2009-03-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christian K  Kauffman → Fort Jackson Logging; 2009-03-03 to 2009-12-31; source msha-controller-operator-history
- **operator_operates_mine:** C & M Coal Company LLC → No 1 Strip; 2010-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Christian K  Kauffman → No 1 Strip; 2010-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christian K  Kauffman → C & M Coal Company LLC; 2010-01-01 to current/open; source msha-controller-operator-history