# Relationship history for MSHA mine 0203105

Current hierarchy: **Doyle A  Farnsworth; Mary  Laucks → Diablo Sand & Gravel LLC → Diablo #1**

- 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:** Diablo Sand & Gravel LLC → Diablo #1; 2005-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Doyle A  Farnsworth  et al → Diablo #1; 2005-11-01 to 2012-11-15; source msha-controller-operator-history
- **controller_controls_operator:** Doyle A  Farnsworth  et al → Diablo Sand & Gravel LLC; 2005-11-01 to 2012-11-15; source msha-controller-operator-history
- **controller_controls_operator:** Terry William  Laucks  et al → Diablo Sand & Gravel LLC; 2005-11-01 to 2012-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Mary  Laucks et al → Diablo #1; 2012-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mary  Laucks et al → Diablo Sand & Gravel LLC; 2012-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Doyle A  Farnsworth et al → Diablo Sand & Gravel LLC; 2012-11-16 to current/open; source msha-controller-operator-history