# Relationship history for MSHA mine 1202404

Current hierarchy: **Blake M  Blann; Michael  Blann; Martha  Blann → BLANN & SON L.L.C. II → Blann & Son Sullivan Quarry**

- 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:** Dennis Lee  Jarvis et al → Blann & Son Sullivan Quarry; 2007-08-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Brampton Brick Inc → Blann & Son Sullivan Quarry; 2007-11-07 to 2008-06-01; source msha-controller-operator-history
- **controller_controls_mine:** Brampton Brick Ltd → Blann & Son Sullivan Quarry; 2007-11-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brampton Brick Ltd → Brampton Brick Inc; 2007-11-07 to 2008-06-01; source msha-controller-operator-history
- **operator_operates_mine:** Jarvis Coal LLC → Blann & Son Sullivan Quarry; 2008-06-02 to 2018-06-13; source msha-controller-operator-history
- **controller_controls_operator:** Dennis Lee  Jarvis et al → Jarvis Coal LLC; 2008-06-02 to 2018-06-13; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Blann et al → Blann & Son Sullivan Quarry; 2016-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** BLANN & SON L.L.C. II → Blann & Son Sullivan Quarry; 2018-06-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Blann et al → BLANN & SON L.L.C. II; 2018-06-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blake M  Blann et al → BLANN & SON L.L.C. II; 2018-06-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martha  Blann et al → BLANN & SON L.L.C. II; 2018-06-14 to current/open; source msha-controller-operator-history