# Relationship history for MSHA mine 2302378

Current hierarchy: **Michael K Farmer; Elliott (Bud) E Farmer → Capital Sand Company, Inc. → Plant #21-Independence**

- 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:** Elliott (Bud) E Farmer  et al → Plant #21-Independence; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mid America Sand LLC → Plant #21-Independence; 2008-05-31 to 2017-06-18; source msha-controller-operator-history
- **controller_controls_mine:** Harlan L  Limpus et al → Plant #21-Independence; 2008-05-31 to 2013-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Harlan L  Limpus et al → Mid America Sand LLC; 2008-05-31 to 2013-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Vance Brothers, Inc. → Plant #21-Independence; 2013-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vance Brothers, Inc. → Mid America Sand LLC; 2013-07-01 to 2017-06-18; source msha-controller-operator-history
- **operator_operates_mine:** Capital Sand Company, Inc. → Plant #21-Independence; 2017-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elliott (Bud) E Farmer  et al → Capital Sand Company, Inc.; 2017-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael K Farmer  et al → Capital Sand Company, Inc.; 2017-06-19 to current/open; source msha-controller-operator-history