# Relationship history for MSHA mine 0900587

Current hierarchy: **Lynn  Fountain → Fountain Stone Company LLC → Fountain Stone Company 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Buchanan Flagstone Quarry → Fountain Stone Company LLC; 1950-01-01 to 1979-08-20; source msha-controller-operator-history
- **controller_controls_mine:** Hallman  Buchanan → Fountain Stone Company LLC; 1950-01-01 to 1979-08-20; source msha-controller-operator-history
- **controller_controls_operator:** Hallman  Buchanan → Buchanan Flagstone Quarry; 1950-01-01 to 1979-08-20; source msha-controller-operator-history
- **operator_operates_mine:** Wayne Anderson Contracting → Fountain Stone Company LLC; 1979-08-21 to 1986-02-24; source msha-controller-operator-history
- **controller_controls_mine:** Wayne  Anderson → Fountain Stone Company LLC; 1979-08-21 to 1986-02-24; source msha-controller-operator-history
- **controller_controls_operator:** Wayne  Anderson → Wayne Anderson Contracting; 1979-08-21 to 1986-02-24; source msha-controller-operator-history
- **operator_operates_mine:** Wilkins Stone Quarries → Fountain Stone Company LLC; 1986-02-25 to 1994-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Douglas W  Wilkins → Fountain Stone Company LLC; 1986-02-25 to 1994-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Douglas W  Wilkins → Wilkins Stone Quarries; 1986-02-25 to 1994-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Poole Building Stone → Fountain Stone Company LLC; 1994-05-01 to 1998-07-22; source msha-controller-operator-history
- **controller_controls_mine:** Casey  Poole → Fountain Stone Company LLC; 1994-05-01 to 1998-07-22; source msha-controller-operator-history
- **controller_controls_operator:** Casey  Poole → Poole Building Stone; 1994-05-01 to 1998-07-22; source msha-controller-operator-history
- **operator_operates_mine:** Fountain Stone Company LLC → Fountain Stone Company LLC; 1998-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Eddie  Fountain → Fountain Stone Company LLC; 1998-07-23 to 2018-04-19; source msha-controller-operator-history
- **controller_controls_operator:** Eddie  Fountain → Fountain Stone Company LLC; 1998-07-23 to 2018-04-19; source msha-controller-operator-history
- **controller_controls_mine:** Lynn  Fountain → Fountain Stone Company LLC; 2018-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lynn  Fountain → Fountain Stone Company LLC; 2018-04-20 to current/open; source msha-controller-operator-history