# Relationship history for MSHA mine 3607818

Current hierarchy: **Adams Jack D & Dale L → J & D Adams Construction → J And D Adams Construction**

- 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:** J & D Adams Construction → J And D Adams Construction; 1986-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Adams Jack D & Dale L → J And D Adams Construction; 1986-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adams Jack D & Dale L → J & D Adams Construction; 1986-07-01 to current/open; source msha-controller-operator-history