# Relationship history for MSHA mine 3503452

Current hierarchy: **Wade  Aylett; Debora L  Aylett → Rock Solid Sand & Gravel → Rock Solid Sand & Gravel 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:** Yattel Incorp → Rock Solid Sand & Gravel LLC; 1997-10-01 to 2004-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Lyle  Aylett → Rock Solid Sand & Gravel LLC; 1997-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lyle  Aylett → Yattel Incorp; 1997-10-01 to 2004-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Solid As A Rock → Rock Solid Sand & Gravel LLC; 2004-08-01 to 2010-08-19; source msha-controller-operator-history
- **controller_controls_mine:** Debora L  Aylett et al → Rock Solid Sand & Gravel LLC; 2004-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Debora L  Aylett et al → Solid As A Rock; 2004-08-01 to 2010-08-19; source msha-controller-operator-history
- **controller_controls_operator:** Wade  Aylett et al → Solid As A Rock; 2004-08-01 to 2010-08-19; source msha-controller-operator-history
- **operator_operates_mine:** Rock Solid Sand & Gravel → Rock Solid Sand & Gravel LLC; 2010-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wade  Aylett et al → Rock Solid Sand & Gravel LLC; 2010-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wade  Aylett et al → Rock Solid Sand & Gravel; 2010-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Debora L  Aylett et al → Rock Solid Sand & Gravel; 2010-08-20 to current/open; source msha-controller-operator-history