# Relationship history for MSHA mine 0103047

Current hierarchy: **Construction Partners Inc → Wiregrass Construction Company, Inc. → Blount Springs 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Blount Springs Materials Co Inc → Blount Springs Sand Plant; 1995-04-01 to 2021-08-01; source msha-controller-operator-history
- **controller_controls_mine:** Robert Fulton  Heatherly → Blount Springs Sand Plant; 1995-04-01 to 2015-05-06; source msha-controller-operator-history
- **controller_controls_operator:** Robert Fulton  Heatherly → Blount Springs Materials Co Inc; 1995-04-01 to 2015-05-06; source msha-controller-operator-history
- **controller_controls_mine:** John  Harper → Blount Springs Sand Plant; 2008-04-23 to 2014-07-07; source msha-controller-operator-history
- **controller_controls_mine:** Construction Partners Inc → Blount Springs Sand Plant; 2014-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert D  Heatherly → Blount Springs Sand Plant; 2015-05-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert D  Heatherly → Blount Springs Materials Co Inc; 2015-05-07 to 2021-08-01; source msha-controller-operator-history
- **operator_operates_mine:** Wiregrass Construction Company, Inc. → Blount Springs Sand Plant; 2021-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Harper → Wiregrass Construction Company, Inc.; 2021-08-02 to 2014-07-07; source msha-controller-operator-history
- **controller_controls_operator:** Construction Partners Inc → Wiregrass Construction Company, Inc.; 2021-08-02 to current/open; source msha-controller-operator-history