# Relationship history for MSHA mine 4405209

Current hierarchy: **Omega Holdings LLC → Omega Surface Mining, LLC → Blending Facility**

- 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

- **operator_operates_mine:** Noralla Corp → Blending Facility; 1979-04-01 to 1994-11-01; source msha-controller-operator-history
- **controller_controls_mine:** Petersville Sleigh Ltd Et Al → Blending Facility; 1979-04-01 to 1994-11-01; source msha-controller-operator-history
- **controller_controls_operator:** Petersville Sleigh Ltd Et Al → Noralla Corp; 1979-04-01 to 1994-11-01; source msha-controller-operator-history
- **operator_operates_mine:** Double D. Construction, Inc. → Blending Facility; 1994-11-02 to 2012-04-23; source msha-controller-operator-history
- **controller_controls_mine:** Joe Douglas  Kilgore → Blending Facility; 1994-11-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joe Douglas  Kilgore → Double D. Construction, Inc.; 1994-11-02 to 2012-04-23; source msha-controller-operator-history
- **controller_controls_mine:** Omega Holdings LLC → Blending Facility; 2011-08-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Princess Flats Energy Corporation → Blending Facility; 2012-04-24 to 2018-11-05; source msha-controller-operator-history
- **controller_controls_mine:** Joe Douglas  Kilgore → Blending Facility; 2012-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joe Douglas  Kilgore → Princess Flats Energy Corporation; 2012-04-24 to 2018-11-05; source msha-controller-operator-history
- **operator_operates_mine:** Omega Surface Mining, LLC → Blending Facility; 2018-11-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Omega Holdings LLC → Omega Surface Mining, LLC; 2018-11-06 to current/open; source msha-controller-operator-history