# Relationship history for MSHA mine 4407118

Current hierarchy: **Adams Construction Company → Adams Construction Co. → Sandy River Sand Plant**

- 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:** Leroy I  McCarty → Sandy River Sand Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Adams Construction Company → Sandy River Sand Plant; 1983-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** McCarty Sand Works → Sandy River Sand Plant; 2004-11-23 to 2007-05-29; source msha-controller-operator-history
- **controller_controls_operator:** Leroy I  McCarty → McCarty Sand Works; 2004-11-23 to 2007-05-29; source msha-controller-operator-history
- **operator_operates_mine:** Adams Construction Co. → Sandy River Sand Plant; 2007-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adams Construction Company → Adams Construction Co.; 2007-05-30 to current/open; source msha-controller-operator-history