# Relationship history for MSHA mine 2002655

Current hierarchy: **Lonnie  Hamilton → Hamilton Sand & Stone → Hamilton Sand & Stone**

- 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:** L J Seng Redi-Mix → Hamilton Sand & Stone; 1981-06-01 to 1984-05-29; source msha-controller-operator-history
- **controller_controls_mine:** Larry J  Seng → Hamilton Sand & Stone; 1981-06-01 to 1984-05-29; source msha-controller-operator-history
- **controller_controls_operator:** Larry J  Seng → L J Seng Redi-Mix; 1981-06-01 to 1984-05-29; source msha-controller-operator-history
- **operator_operates_mine:** Gerdes Redi-Mix → Hamilton Sand & Stone; 1984-05-30 to 1995-10-16; source msha-controller-operator-history
- **controller_controls_mine:** Joseph R  Gerdes → Hamilton Sand & Stone; 1984-05-30 to 1995-10-16; source msha-controller-operator-history
- **controller_controls_operator:** Joseph R  Gerdes → Gerdes Redi-Mix; 1984-05-30 to 1995-10-16; source msha-controller-operator-history
- **operator_operates_mine:** Hamilton Sand & Stone → Hamilton Sand & Stone; 1995-10-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lonnie  Hamilton → Hamilton Sand & Stone; 1995-10-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lonnie  Hamilton → Hamilton Sand & Stone; 1995-10-17 to current/open; source msha-controller-operator-history