# Relationship history for MSHA mine 0600768

Current hierarchy: **Henry J  Bahre; John H  Bahre → CANTON VILLAGE CONSTRUCTION CO., INC. → RAMP ROAD PLANT**

- 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:** Henry J  Bahre et al → RAMP ROAD PLANT; 1980-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Canton Village Construction Co., Inc. → RAMP ROAD PLANT; 2011-02-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Henry J  Bahre et al → Canton Village Construction Co., Inc.; 2011-02-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John H  Bahre et al → Canton Village Construction Co., Inc.; 2011-02-17 to current/open; source msha-controller-operator-history