# Relationship history for MSHA mine 0301603

Current hierarchy: **Michael K Farmer; Elliott (Bud) E Farmer → Capital Sand Company, Inc. → Harrisburg South- Plant #14**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Michael K Farmer  et al → Harrisburg South- Plant #14; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** RazorRock Materials → Harrisburg South- Plant #14; 1986-01-01 to 2022-02-20; source msha-controller-operator-history
- **controller_controls_mine:** W Kent  Ingram → Harrisburg South- Plant #14; 1986-01-01 to 2017-02-26; source msha-controller-operator-history
- **controller_controls_operator:** W Kent  Ingram → RazorRock Materials; 1986-01-01 to 2017-02-26; source msha-controller-operator-history
- **controller_controls_mine:** Summit Materials LLC → Harrisburg South- Plant #14; 2017-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Summit Materials LLC → RazorRock Materials; 2017-02-27 to 2022-02-20; source msha-controller-operator-history
- **operator_operates_mine:** Capital Sand Company, Inc. → Harrisburg South- Plant #14; 2022-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael K Farmer  et al → Capital Sand Company, Inc.; 2022-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elliott (Bud) E Farmer  et al → Capital Sand Company, Inc.; 2022-02-21 to current/open; source msha-controller-operator-history