# Relationship history for MSHA mine 2902202

Current hierarchy: **Geoff  McMahon; Curtis  Slade → Newco Aggregates → CROUCH MESA 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Newco Aggregates → CROUCH MESA PIT; 2000-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Curtis  Slade et al → CROUCH MESA PIT; 2000-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Curtis  Slade et al → Newco Aggregates; 2000-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Geoff  McMahon et al → Newco Aggregates; 2000-06-01 to current/open; source msha-controller-operator-history