# Relationship history for MSHA mine 2901899

Current hierarchy: **Charles E  Hamilton; Carroll  Hamilton → James Hamilton Construction Co. → Crusher No. 2**

- 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:** Carroll  Hamilton  et al → Crusher No. 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** James Hamilton Construction Co. → Crusher No. 2; 1983-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carroll  Hamilton  et al → James Hamilton Construction Co.; 1983-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles E  Hamilton  et al → James Hamilton Construction Co.; 1983-01-01 to current/open; source msha-controller-operator-history