# Relationship history for MSHA mine 1202214

Current hierarchy: **Dawn  Littleton → Littleton & Sons Sand & Supply Inc → LITTLETON SAND & SUPPLY**

- 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

- **controller_controls_mine:** John  Littleton Jr et al → LITTLETON SAND & SUPPLY; 1950-01-01 to 2020-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Littleton & Sons Sand & Supply Inc → LITTLETON SAND & SUPPLY; 1997-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Littleton Jr et al → Littleton & Sons Sand & Supply Inc; 1997-06-01 to 2020-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Littleton et al → Littleton & Sons Sand & Supply Inc; 1997-06-01 to 2020-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Dawn L  Littleton et al → LITTLETON SAND & SUPPLY; 2021-01-01 to 2021-12-26; source msha-controller-operator-history
- **controller_controls_operator:** Dawn L  Littleton et al → Littleton & Sons Sand & Supply Inc; 2021-01-01 to 2021-12-26; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Littleton et al → Littleton & Sons Sand & Supply Inc; 2021-01-01 to 2021-12-26; source msha-controller-operator-history
- **controller_controls_mine:** Dawn  Littleton → LITTLETON SAND & SUPPLY; 2021-12-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dawn  Littleton → Littleton & Sons Sand & Supply Inc; 2021-12-27 to current/open; source msha-controller-operator-history