# Relationship history for MSHA mine 4104717

Current hierarchy: **David Edward  Wittwer → Chatfield Materials, LLC → Chatfield Materials**

- 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

- **controller_controls_mine:** Danny G  Rice → Chatfield Materials; 1995-07-01 to 2006-02-06; source msha-controller-operator-history
- **controller_controls_mine:** Dan R  Wittwer et al → Chatfield Materials; 2006-02-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Seven Points Sand & Gravel, Inc. → Chatfield Materials; 2008-03-11 to 2011-06-12; source msha-controller-operator-history
- **controller_controls_operator:** Dan R  Wittwer et al → Seven Points Sand & Gravel, Inc.; 2008-03-11 to 2011-06-12; source msha-controller-operator-history
- **controller_controls_operator:** David E  Wittwer et al → Seven Points Sand & Gravel, Inc.; 2008-03-11 to 2011-06-12; source msha-controller-operator-history
- **controller_controls_operator:** Danny G  Rice → Seven Points Sand & Gravel, Inc.; 2008-03-11 to 2006-02-06; source msha-controller-operator-history
- **operator_operates_mine:** Frontier Mining & Materials, L.L.C. → Chatfield Materials; 2011-06-13 to 2014-02-26; source msha-controller-operator-history
- **controller_controls_mine:** The David & Cindy Living Trust et al → Chatfield Materials; 2011-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** The David & Cindy Living Trust et al → Frontier Mining & Materials, L.L.C.; 2011-06-13 to 2014-02-26; source msha-controller-operator-history
- **controller_controls_operator:** Muamar G  Anani et al → Frontier Mining & Materials, L.L.C.; 2011-06-13 to 2014-02-26; source msha-controller-operator-history
- **operator_operates_mine:** Chatfield Materials, LLC → Chatfield Materials; 2014-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David Edward  Wittwer → Chatfield Materials; 2014-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David Edward  Wittwer → Chatfield Materials, LLC; 2014-02-27 to current/open; source msha-controller-operator-history