# Relationship history for MSHA mine 3607970

Current hierarchy: **Oliver  Gage; Alan  Gage; John  Gage → KH STONE LLC → KH STONE LLC**

- 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:** Gage Quarry → KH STONE LLC; 1987-12-01 to 2024-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Alan C  Gage → KH STONE LLC; 1987-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alan C  Gage → Gage Quarry; 1987-12-01 to 2024-11-30; source msha-controller-operator-history
- **operator_operates_mine:** KH STONE LLC → KH STONE LLC; 2024-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alan  Gage et al → KH STONE LLC; 2024-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alan  Gage et al → KH STONE LLC; 2024-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Gage et al → KH STONE LLC; 2024-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Oliver  Gage et al → KH STONE LLC; 2024-12-01 to current/open; source msha-controller-operator-history