# Relationship history for MSHA mine 0202731

Current hierarchy: **Shirley J  Hammond → Hammond Wholesale Flagstone, Inc. → Rocky II**

- 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

- **controller_controls_mine:** Horner James E → Rocky II; 1997-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Horner Stone → Rocky II; 1997-11-01 to 2005-03-08; source msha-controller-operator-history
- **controller_controls_operator:** Horner James E → Horner Stone; 1997-11-01 to 2005-03-08; source msha-controller-operator-history
- **controller_controls_mine:** Van B  Falls → Rocky II; 1999-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shirley J  Hammond → Rocky II; 1999-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** V-E Stone → Rocky II; 2005-03-09 to 2005-08-03; source msha-controller-operator-history
- **controller_controls_operator:** Van B  Falls → V-E Stone; 2005-03-09 to 2005-08-03; source msha-controller-operator-history
- **operator_operates_mine:** Hammond Wholesale Flagstone, Inc. → Rocky II; 2005-08-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shirley J  Hammond → Hammond Wholesale Flagstone, Inc.; 2005-08-04 to current/open; source msha-controller-operator-history