# Relationship history for MSHA mine 3609592

Current hierarchy: **Jeremy W Mackall; Denise J Mackall; William T Mackall → Shenango Limestone and Storage Company, LLC → Wampum 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Cemex S A → Wampum Quarry; 1994-09-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cemex Incorporated → Wampum Quarry; 2008-06-27 to 2026-09-07; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex Incorporated; 2008-06-27 to 2026-09-07; source msha-controller-operator-history
- **controller_controls_mine:** Jeremy W Mackall et al → Wampum Quarry; 2020-12-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Shenango Limestone and Storage Company, LLC → Wampum Quarry; 2026-09-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeremy W Mackall et al → Shenango Limestone and Storage Company, LLC; 2026-09-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William T Mackall et al → Shenango Limestone and Storage Company, LLC; 2026-09-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Denise J Mackall et al → Shenango Limestone and Storage Company, LLC; 2026-09-08 to current/open; source msha-controller-operator-history