# Relationship history for MSHA mine 0103385

Current hierarchy: **Frank L Montgomery; L. David  Mathews → Saiia Construction Company LLC → Demopolis Sand Operation**

- 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:** Freeman Excavating LLC → Demopolis Sand Operation; 2008-03-25 to 2009-05-11; source msha-controller-operator-history
- **controller_controls_mine:** Ronald O  Freeman → Demopolis Sand Operation; 2008-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald O  Freeman → Freeman Excavating LLC; 2008-03-25 to 2009-05-11; source msha-controller-operator-history
- **operator_operates_mine:** Lock 4 Sand Company → Demopolis Sand Operation; 2009-05-12 to 2010-10-17; source msha-controller-operator-history
- **controller_controls_mine:** Fred R  Hansard → Demopolis Sand Operation; 2009-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fred R  Hansard → Lock 4 Sand Company; 2009-05-12 to 2010-10-17; source msha-controller-operator-history
- **operator_operates_mine:** Saiia Construction Company LLC → Demopolis Sand Operation; 2010-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joseph  Saiia et al → Demopolis Sand Operation; 2010-10-18 to 2016-05-12; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Saiia et al → Saiia Construction Company LLC; 2010-10-18 to 2016-05-12; source msha-controller-operator-history
- **controller_controls_operator:** Frank  Montgomery et al → Saiia Construction Company LLC; 2010-10-18 to 2016-05-12; source msha-controller-operator-history
- **controller_controls_mine:** L. David  Mathews → Demopolis Sand Operation; 2016-05-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** L. David  Mathews → Saiia Construction Company LLC; 2016-05-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frank L Montgomery → Saiia Construction Company LLC; 2016-05-13 to current/open; source msha-controller-operator-history