# Relationship history for MSHA mine 4400156

Current hierarchy: **Salem Stone Corp; Adams Construction; Mountain Materials Inc → Southside Materials, LLC → Chatham 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

- **operator_operates_mine:** Vulcan Materials Company → Chatham Quarry; 1950-01-01 to 2002-11-20; source msha-controller-operator-history
- **controller_controls_mine:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Chatham Quarry; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Materials Company; 1950-01-01 to 2002-11-20; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Construction Materials, LP → Chatham Quarry; 2002-11-21 to 2010-03-26; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Construction Materials, LP; 2002-11-21 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Chatham Quarry; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Vulcan Materials Company; 2007-11-16 to 2002-11-20; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Vulcan Construction Materials, LP; 2007-11-16 to 2010-03-26; source msha-controller-operator-history
- **operator_operates_mine:** Southside Materials, LLC → Chatham Quarry; 2010-03-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Adams Construction et al → Chatham Quarry; 2010-03-27 to 2012-06-27; source msha-controller-operator-history
- **controller_controls_operator:** Adams Construction et al → Southside Materials, LLC; 2010-03-27 to 2012-06-27; source msha-controller-operator-history
- **controller_controls_operator:** Salem Stone Corp et al → Southside Materials, LLC; 2010-03-27 to 2012-06-27; source msha-controller-operator-history
- **controller_controls_mine:** Mountain Materials Inc et al → Chatham Quarry; 2012-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mountain Materials Inc et al → Southside Materials, LLC; 2012-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Salem Stone Corp et al → Southside Materials, LLC; 2012-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adams Construction et al → Southside Materials, LLC; 2012-06-28 to current/open; source msha-controller-operator-history