# Relationship history for MSHA mine 1601292

Current hierarchy: **Meredith Locke → Watson Dirt Sand & Gravel Pit Inc → ADDISON LEASE**

- 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:** Plainview Products Inc → ADDISON LEASE; 1995-08-01 to 1996-04-23; source msha-controller-operator-history
- **controller_controls_mine:** T Eric  Johnson → ADDISON LEASE; 1995-08-01 to 1997-09-02; source msha-controller-operator-history
- **controller_controls_operator:** T Eric  Johnson → Plainview Products Inc; 1995-08-01 to 1996-04-23; source msha-controller-operator-history
- **operator_operates_mine:** Watson Dirt Sand & Gravel Pit Inc → ADDISON LEASE; 1996-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Meredith Locke → ADDISON LEASE; 1996-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Meredith Locke → Watson Dirt Sand & Gravel Pit Inc; 1996-04-24 to current/open; source msha-controller-operator-history