# Relationship history for MSHA mine 1901228

Current hierarchy: **Michael P  Hogan; Christopher  Makepeace → A.D. Makepeace Co. → Carverside Plant #5**

- 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

- **operator_operates_mine:** A.D. Makepeace Co. → Carverside Plant #5; 2012-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael P  Hogan et al → Carverside Plant #5; 2012-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael P  Hogan et al → A.D. Makepeace Co.; 2012-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christopher  Makepeace et al → A.D. Makepeace Co.; 2012-04-12 to current/open; source msha-controller-operator-history