# Relationship history for MSHA mine 0404986

Current hierarchy: **Coleman Ed & V R (Bud) Cox → Cox & Coleman Construction → LAKE BRITTON BASIN PIT**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Cox & Coleman Construction → LAKE BRITTON BASIN PIT; 1988-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Coleman Ed & V R (Bud) Cox → LAKE BRITTON BASIN PIT; 1988-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Coleman Ed & V R (Bud) Cox → Cox & Coleman Construction; 1988-11-01 to current/open; source msha-controller-operator-history