# Relationship history for MSHA mine 1202463

Current hierarchy: **Dawn  Littleton → Littleton Sand & Supply → Stone Yard**

- 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:** Joseph  Littleton et al → Stone Yard; 1950-01-01 to 2020-12-31; source msha-controller-operator-history
- **operator_operates_mine:** L & L Bulk Transport → Stone Yard; 2013-04-30 to 2021-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Dawn  Littleton → Stone Yard; 2013-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dawn  Littleton → L & L Bulk Transport; 2013-04-30 to 2021-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Joseph  Littleton et al → Stone Yard; 2021-01-01 to 2021-12-26; source msha-controller-operator-history
- **operator_operates_mine:** Littleton Sand & Supply → Stone Yard; 2021-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Littleton et al → Littleton Sand & Supply; 2021-11-01 to 2021-12-26; source msha-controller-operator-history
- **controller_controls_operator:** Dawn L  Littleton et al → Littleton Sand & Supply; 2021-11-01 to 2021-12-26; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Littleton et al → Littleton Sand & Supply; 2021-11-01 to 2020-12-31; source msha-controller-operator-history
- **controller_controls_operator:** John  Littleton Jr et al → Littleton Sand & Supply; 2021-11-01 to 2020-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Dawn  Littleton → Stone Yard; 2021-12-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dawn  Littleton → Littleton Sand & Supply; 2021-12-27 to current/open; source msha-controller-operator-history