# Relationship history for MSHA mine 3200924

Current hierarchy: **Andy  Brown → Blue Butte Aggregates LLC → Dobias Pit  #1**

- 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:** ROOT CONSTRUCTION, INC → Dobias Pit  #1; 2011-12-09 to 2019-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Susan  Graham → Dobias Pit  #1; 2011-12-09 to 2013-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Susan  Graham → ROOT CONSTRUCTION, INC; 2011-12-09 to 2013-01-31; source msha-controller-operator-history
- **controller_controls_mine:** William  Quig et al → Dobias Pit  #1; 2013-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Quig et al → ROOT CONSTRUCTION, INC; 2013-02-01 to 2019-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Andy  Bednarik et al → ROOT CONSTRUCTION, INC; 2013-02-01 to 2019-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Blue Butte Aggregates LLC → Dobias Pit  #1; 2020-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Andy  Brown → Dobias Pit  #1; 2020-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Andy  Brown → Blue Butte Aggregates LLC; 2020-01-01 to current/open; source msha-controller-operator-history