# Relationship history for MSHA mine 4103117

Current hierarchy: **Denise  Schneider → Dds Materials Inc → Huffmeister Facility**

- 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:** Mahoney Stanford R → Huffmeister Facility; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lott Materials Company Inc → Huffmeister Facility; 1982-06-01 to 1983-03-28; source msha-controller-operator-history
- **controller_controls_mine:** Lott Robert S → Huffmeister Facility; 1982-06-01 to 1983-03-28; source msha-controller-operator-history
- **controller_controls_operator:** Lott Robert S → Lott Materials Company Inc; 1982-06-01 to 1983-03-28; source msha-controller-operator-history
- **operator_operates_mine:** All Minerals Corp → Huffmeister Facility; 1983-03-29 to 1985-01-06; source msha-controller-operator-history
- **controller_controls_operator:** Mahoney Stanford R → All Minerals Corp; 1983-03-29 to 1985-01-06; source msha-controller-operator-history
- **operator_operates_mine:** Hematech Ltd → Huffmeister Facility; 1985-01-07 to 1989-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Circle Properties Inc-Ardblair Properties Inc Et A → Huffmeister Facility; 1985-01-07 to 1989-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Circle Properties Inc-Ardblair Properties Inc Et A → Hematech Ltd; 1985-01-07 to 1989-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Denise  Schneider → Huffmeister Facility; 1989-02-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dds Materials Inc → Huffmeister Facility; 1989-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Denise  Schneider → Dds Materials Inc; 1989-07-01 to current/open; source msha-controller-operator-history