# Relationship history for MSHA mine 2200709

Current hierarchy: **Richard  Burge; Randy  Burge → South Gate Aggregates → South Gate Aggregates**

- 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:** Burge Partnership → South Gate Aggregates; 1999-04-01 to 2009-10-08; source msha-controller-operator-history
- **controller_controls_mine:** Richard  Burge  et al → South Gate Aggregates; 1999-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Burge  et al → Burge Partnership; 1999-04-01 to 2009-10-08; source msha-controller-operator-history
- **controller_controls_operator:** Randy  Burge  et al → Burge Partnership; 1999-04-01 to 2009-10-08; source msha-controller-operator-history
- **operator_operates_mine:** South Gate Aggregates → South Gate Aggregates; 2009-10-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard  Burge  et al → South Gate Aggregates; 2009-10-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Burge  et al → South Gate Aggregates; 2009-10-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy  Burge  et al → South Gate Aggregates; 2009-10-09 to current/open; source msha-controller-operator-history