# Relationship history for MSHA mine 2700056

Current hierarchy: **Steve  Boucher → Harris Construction Co Inc → Harris Construction Co Inc**

- 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:** Harris Construction Company Inc → Harris Construction Co Inc; 1950-01-01 to 1984-06-17; source msha-controller-operator-history
- **controller_controls_mine:** Mason K  Harris → Harris Construction Co Inc; 1950-01-01 to 2015-03-26; source msha-controller-operator-history
- **controller_controls_operator:** Mason K  Harris → Harris Construction Company Inc; 1950-01-01 to 1984-06-17; source msha-controller-operator-history
- **controller_controls_mine:** R David  Schelzi → Harris Construction Co Inc; 1978-04-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Coastal Materials Corp → Harris Construction Co Inc; 1984-06-18 to 1985-06-10; source msha-controller-operator-history
- **controller_controls_operator:** R David  Schelzi → Coastal Materials Corp; 1984-06-18 to 1985-06-10; source msha-controller-operator-history
- **operator_operates_mine:** Harris Construction Co Inc → Harris Construction Co Inc; 1985-06-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mason K  Harris → Harris Construction Co Inc; 1985-06-11 to 2015-03-26; source msha-controller-operator-history
- **controller_controls_mine:** Bertha K Harris → Harris Construction Co Inc; 2015-03-27 to 2020-05-07; source msha-controller-operator-history
- **controller_controls_operator:** Bertha K Harris → Harris Construction Company Inc; 2015-03-27 to 1984-06-17; source msha-controller-operator-history
- **controller_controls_operator:** Bertha K Harris → Harris Construction Co Inc; 2015-03-27 to 2020-05-07; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Boucher → Harris Construction Co Inc; 2020-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Boucher → Harris Construction Company Inc; 2020-05-08 to 1984-06-17; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Boucher → Harris Construction Co Inc; 2020-05-08 to current/open; source msha-controller-operator-history