# Relationship history for MSHA mine 3102042

Current hierarchy: **Colas S A → Larco Construction → HAMPTON MINE**

- 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:** Lackey Sand Inc → HAMPTON MINE; 1989-11-01 to 1992-06-22; source msha-controller-operator-history
- **controller_controls_mine:** L William  Lackey → HAMPTON MINE; 1989-11-01 to 1992-06-22; source msha-controller-operator-history
- **controller_controls_operator:** L William  Lackey → Lackey Sand Inc; 1989-11-01 to 1992-06-22; source msha-controller-operator-history
- **operator_operates_mine:** Aaron Sand & Gravel Company → HAMPTON MINE; 1992-06-23 to 2000-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Sandra  Beeman → HAMPTON MINE; 1992-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sandra  Beeman → Aaron Sand & Gravel Company; 1992-06-23 to 2000-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Larco Construction → HAMPTON MINE; 2000-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Colas S A → HAMPTON MINE; 2000-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Colas S A → Larco Construction; 2000-04-01 to current/open; source msha-controller-operator-history