# Relationship history for MSHA mine 2302343

Current hierarchy: **Brad  Hardcastle → HIGHWAY 160 QUARRY LLC → HIGHWAY 160 QUARRY**

- 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:** MLH & SONS, INC → HIGHWAY 160 QUARRY; 2006-10-11 to 2013-10-30; source msha-controller-operator-history
- **controller_controls_mine:** Velma  Hambelton et al → HIGHWAY 160 QUARRY; 2006-10-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Velma  Hambelton et al → MLH & SONS, INC; 2006-10-11 to 2013-10-30; source msha-controller-operator-history
- **controller_controls_operator:** Martie Lee  Hambelton et al → MLH & SONS, INC; 2006-10-11 to 2013-10-30; source msha-controller-operator-history
- **operator_operates_mine:** HIGHWAY 160 QUARRY LLC → HIGHWAY 160 QUARRY; 2013-10-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brad  Hardcastle → HIGHWAY 160 QUARRY; 2013-10-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brad  Hardcastle → HIGHWAY 160 QUARRY LLC; 2013-10-31 to current/open; source msha-controller-operator-history