# Relationship history for MSHA mine 2003060

Current hierarchy: **Craig Steven  Fons → GBM Sand & Gravel LLC → GBM Sand & Gravel**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Spring Aggregate L L C → GBM Sand & Gravel; 1998-05-01 to 2017-07-18; source msha-controller-operator-history
- **controller_controls_mine:** Ron  Reynolds et al → GBM Sand & Gravel; 1998-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ron  Reynolds et al → Spring Aggregate L L C; 1998-05-01 to 2017-07-18; source msha-controller-operator-history
- **controller_controls_operator:** Dave  Berry et al → Spring Aggregate L L C; 1998-05-01 to 2017-07-18; source msha-controller-operator-history
- **operator_operates_mine:** GBM Sand & Gravel LLC → GBM Sand & Gravel; 2017-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Craig S  Fons et al → GBM Sand & Gravel; 2017-07-19 to 2018-04-19; source msha-controller-operator-history
- **controller_controls_operator:** Craig S  Fons et al → GBM Sand & Gravel LLC; 2017-07-19 to 2018-04-19; source msha-controller-operator-history
- **controller_controls_operator:** David J  Fons et al → GBM Sand & Gravel LLC; 2017-07-19 to 2018-04-19; source msha-controller-operator-history
- **controller_controls_mine:** Craig Steven  Fons → GBM Sand & Gravel; 2018-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Craig Steven  Fons → GBM Sand & Gravel LLC; 2018-04-20 to current/open; source msha-controller-operator-history