# Relationship history for MSHA mine 3401436

Current hierarchy: **ALNC Holdings → Exit 5 Sand & Gravel, LLC → Exit 5 Sand & Gravel**

- 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:** Hanson PLC → Exit 5 Sand & Gravel; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donald W  Davis  et al → Exit 5 Sand & Gravel; 1977-11-01 to 1986-10-16; source msha-controller-operator-history
- **operator_operates_mine:** Gainesville Sand & Gravel Company → Exit 5 Sand & Gravel; 1984-02-01 to 1986-10-16; source msha-controller-operator-history
- **controller_controls_operator:** Donald W  Davis  et al → Gainesville Sand & Gravel Company; 1984-02-01 to 1986-10-16; source msha-controller-operator-history
- **operator_operates_mine:** Hanson Aggregates West Inc → Exit 5 Sand & Gravel; 1986-10-17 to 2004-05-09; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Hanson Aggregates West Inc; 1986-10-17 to 2004-05-09; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Exit 5 Sand & Gravel; 1988-11-14 to 2007-08-22; source msha-controller-operator-history
- **operator_operates_mine:** Hanson Aggregates → Exit 5 Sand & Gravel; 2004-05-10 to 2008-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Hanson Aggregates; 2004-05-10 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → Exit 5 Sand & Gravel; 2007-08-23 to 2021-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Hanson Aggregates; 2007-08-23 to 2008-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Southern Aggregates → Exit 5 Sand & Gravel; 2008-10-01 to 2014-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Mike I  Weir et al → Exit 5 Sand & Gravel; 2008-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike I  Weir et al → Southern Aggregates; 2008-10-01 to 2014-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Exit 5 Sand & Gravel, LLC → Exit 5 Sand & Gravel; 2015-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** ALNC Holdings → Exit 5 Sand & Gravel; 2015-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** ALNC Holdings → Exit 5 Sand & Gravel, LLC; 2015-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → Exit 5 Sand & Gravel; 2021-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Hanson Aggregates; 2021-10-01 to 2008-09-30; source msha-controller-operator-history