# Relationship history for MSHA mine 2200541

Current hierarchy: **Robertson Nic → Agricultural Lime Company Inc → Agricultural Lime Company Incorporated**

- 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:** American Resources Inc → Agricultural Lime Company Incorporated; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dolime Minerals Company → Agricultural Lime Company Incorporated; 1981-09-01 to 1983-09-29; source msha-controller-operator-history
- **controller_controls_operator:** American Resources Inc → Dolime Minerals Company; 1981-09-01 to 1983-09-29; source msha-controller-operator-history
- **operator_operates_mine:** Agricultural Lime Company Inc → Agricultural Lime Company Incorporated; 1983-09-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robertson Nic → Agricultural Lime Company Incorporated; 1983-09-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robertson Nic → Agricultural Lime Company Inc; 1983-09-30 to current/open; source msha-controller-operator-history