# Relationship history for MSHA mine 4406202

Current hierarchy: **Long Wallace → B & W Construction Company Inc → #1**

- 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:** Davis Ted → #1; 1982-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** T Davis Coal Company Inc → #1; 1985-04-01 to 1986-07-29; source msha-controller-operator-history
- **controller_controls_operator:** Davis Ted → T Davis Coal Company Inc; 1985-04-01 to 1986-07-29; source msha-controller-operator-history
- **operator_operates_mine:** B & W Construction Company Inc → #1; 1986-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Long Wallace Et Al → #1; 1986-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Long Wallace Et Al → B & W Construction Company Inc; 1986-07-30 to current/open; source msha-controller-operator-history