# Relationship history for MSHA mine 1302132

Current hierarchy: **Tony  Thier → BARD Materials → Portable Sand 2**

- 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

- **controller_controls_mine:** Dennis J  Thier et al → Portable Sand 2; 1950-01-01 to 2014-03-02; source msha-controller-operator-history
- **controller_controls_mine:** Reid E  Kuhlman et al → Portable Sand 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kuhlman Construction Company → Portable Sand 2; 1985-08-01 to 2010-12-21; source msha-controller-operator-history
- **controller_controls_operator:** Reid E  Kuhlman et al → Kuhlman Construction Company; 1985-08-01 to 2010-12-21; source msha-controller-operator-history
- **controller_controls_operator:** Rick L  Kuhlman et al → Kuhlman Construction Company; 1985-08-01 to 2010-12-21; source msha-controller-operator-history
- **operator_operates_mine:** Kuhlman Construction LC → Portable Sand 2; 2010-12-22 to 2014-03-02; source msha-controller-operator-history
- **controller_controls_mine:** Bard Acquisitions II, LLC et al → Portable Sand 2; 2010-12-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bard Acquisitions II, LLC et al → Kuhlman Construction LC; 2010-12-22 to 2014-03-02; source msha-controller-operator-history
- **controller_controls_operator:** Kermit Construction et al → Kuhlman Construction LC; 2010-12-22 to 2014-03-02; source msha-controller-operator-history
- **operator_operates_mine:** BARD Materials → Portable Sand 2; 2014-03-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tony  Thier → Portable Sand 2; 2014-03-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tony  Thier → BARD Materials; 2014-03-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis J  Thier et al → BARD Materials; 2014-03-03 to 2014-03-02; source msha-controller-operator-history