# Relationship history for MSHA mine 0103363

Current hierarchy: **Construction Partners Inc → Wiregrass Construction Co., Inc. → Lambert Materials**

- 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:** Lambert Materials LLC → Lambert Materials; 2007-03-13 to 2008-04-22; source msha-controller-operator-history
- **controller_controls_mine:** Carol L  Lambert et al → Lambert Materials; 2007-03-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carol L  Lambert et al → Lambert Materials LLC; 2007-03-13 to 2008-04-22; source msha-controller-operator-history
- **operator_operates_mine:** Wiregrass Construction Co., Inc. → Lambert Materials; 2008-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John  Harper → Lambert Materials; 2008-04-23 to 2014-07-07; source msha-controller-operator-history
- **controller_controls_operator:** John  Harper → Wiregrass Construction Co., Inc.; 2008-04-23 to 2014-07-07; source msha-controller-operator-history
- **controller_controls_mine:** Construction Partners Inc → Lambert Materials; 2014-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Construction Partners Inc → Wiregrass Construction Co., Inc.; 2014-07-08 to current/open; source msha-controller-operator-history