# Relationship history for MSHA mine 0203285

Current hierarchy: **James  Pate → Western Exploration & Road Construction Inc → Ridco**

- 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:** Arizona Construction Equipment, LLC → Ridco; 2011-06-28 to 2011-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Brian  Langenbach Sr  et al → Ridco; 2011-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Langenbach Sr  et al → Arizona Construction Equipment, LLC; 2011-06-28 to 2011-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Lawrence  Martinie et al → Arizona Construction Equipment, LLC; 2011-06-28 to 2011-12-31; source msha-controller-operator-history
- **operator_operates_mine:** MINERAL CONSULTANTS AND DEVELOPMENT,INC → Ridco; 2012-01-01 to 2017-06-06; source msha-controller-operator-history
- **controller_controls_mine:** Lawrence  Martinie et al → Ridco; 2012-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lawrence  Martinie et al → MINERAL CONSULTANTS AND DEVELOPMENT,INC; 2012-01-01 to 2017-06-06; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Langenbach Sr  et al → MINERAL CONSULTANTS AND DEVELOPMENT,INC; 2012-01-01 to 2017-06-06; source msha-controller-operator-history
- **controller_controls_mine:** James  Pate → Ridco; 2017-01-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Western Exploration & Road Construction Inc → Ridco; 2017-06-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Pate → Western Exploration & Road Construction Inc; 2017-06-07 to current/open; source msha-controller-operator-history