# Relationship history for MSHA mine 1002246

Current hierarchy: **Kit H  Tillotson → KT Sand & Gravel, llc → Lish 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:** KT Sand & Gravel, llc → Lish Pit; 2014-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kit H  Tillotson → Lish Pit; 2014-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kit H  Tillotson → KT Sand & Gravel, llc; 2014-04-24 to current/open; source msha-controller-operator-history