# Relationship history for MSHA mine 1102646

Current hierarchy: **Joe  Hamman → Fox Ridge Stone LLC → Fox Ridge Stone Co.**

- 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:** Fox Ridge Stone LLC → Fox Ridge Stone Co.; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Don  Hamman → Fox Ridge Stone Co.; 1978-03-09 to 2019-04-07; source msha-controller-operator-history
- **controller_controls_operator:** Don  Hamman → Fox Ridge Stone LLC; 1978-03-09 to 2019-04-07; source msha-controller-operator-history
- **controller_controls_mine:** Joe  Hamman → Fox Ridge Stone Co.; 2019-04-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joe  Hamman → Fox Ridge Stone LLC; 2019-04-08 to current/open; source msha-controller-operator-history