# Relationship history for MSHA mine 1518031

Current hierarchy: **Kenneth L  Farley → Dry Fork Energy Inc → Mine #3**

- 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:** Kenneth L  Farley et al → Mine #3; 1995-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dirk  Johnson → Mine #3; 1997-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tycoby Fuels Corp → Mine #3; 1998-03-01 to 1999-05-19; source msha-controller-operator-history
- **controller_controls_operator:** Dirk  Johnson → Tycoby Fuels Corp; 1998-03-01 to 1999-05-19; source msha-controller-operator-history
- **operator_operates_mine:** Dry Fork Energy Inc → Mine #3; 1999-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth L  Farley et al → Dry Fork Energy Inc; 1999-05-20 to current/open; source msha-controller-operator-history