# Relationship history for MSHA mine 2901745

Current hierarchy: **Lisa  Little; Timothy  Little → Chaparral Sand & Gravel → Chaparral Pit #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

- **operator_operates_mine:** Chaparral Sand & Gravel → Chaparral Pit #1; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gene E  Little → Chaparral Pit #1; 1979-01-01 to 2021-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Gene E  Little → Chaparral Sand & Gravel; 1979-01-01 to 2021-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Timothy  Little et al → Chaparral Pit #1; 2021-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy  Little et al → Chaparral Sand & Gravel; 2021-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lisa  Little et al → Chaparral Sand & Gravel; 2021-07-01 to current/open; source msha-controller-operator-history