# Relationship history for MSHA mine 0301773

Current hierarchy: **Michael K Farmer; Elliott (Bud) E Farmer → Capital Sand Company, Inc. → Harrisburg North- Plant #13**

- 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

- **controller_controls_mine:** Michael K Farmer  et al → Harrisburg North- Plant #13; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Drum Sand & Gravel Inc → Harrisburg North- Plant #13; 1996-05-01 to 2022-01-17; source msha-controller-operator-history
- **controller_controls_mine:** Jeff  Drum → Harrisburg North- Plant #13; 1996-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeff  Drum → Drum Sand & Gravel Inc; 1996-05-01 to 2022-01-17; source msha-controller-operator-history
- **operator_operates_mine:** Capital Sand Company, Inc. → Harrisburg North- Plant #13; 2022-01-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael K Farmer  et al → Capital Sand Company, Inc.; 2022-01-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elliott (Bud) E Farmer  et al → Capital Sand Company, Inc.; 2022-01-18 to current/open; source msha-controller-operator-history