# Relationship history for MSHA mine 3606070

Current hierarchy: **Smyda Chester → Indiana Mining Consultants → Highwall Mining 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

- **controller_controls_mine:** Good Eincel M → Highwall Mining Co Inc; 1974-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Highwall Mining Company Inc → Highwall Mining Co Inc; 1976-06-01 to 1978-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Good Eincel M → Highwall Mining Company Inc; 1976-06-01 to 1978-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Highwall Mining Company → Highwall Mining Co Inc; 1978-11-01 to 1979-09-03; source msha-controller-operator-history
- **controller_controls_mine:** Adrian Coal & Coke Inc → Highwall Mining Co Inc; 1978-11-01 to 1979-09-03; source msha-controller-operator-history
- **controller_controls_operator:** Adrian Coal & Coke Inc → Highwall Mining Company; 1978-11-01 to 1979-09-03; source msha-controller-operator-history
- **operator_operates_mine:** Highwall Mining Company → Highwall Mining Co Inc; 1979-09-04 to 1980-09-28; source msha-controller-operator-history
- **controller_controls_mine:** Burke & Mc Guire Coal Inc → Highwall Mining Co Inc; 1979-09-04 to 1980-09-28; source msha-controller-operator-history
- **controller_controls_operator:** Burke & Mc Guire Coal Inc → Highwall Mining Company; 1979-09-04 to 1980-09-28; source msha-controller-operator-history
- **operator_operates_mine:** Highwall Mining Company Inc → Highwall Mining Co Inc; 1980-09-29 to 1981-03-18; source msha-controller-operator-history
- **controller_controls_mine:** Friedlander Bernard → Highwall Mining Co Inc; 1980-09-29 to 1981-03-18; source msha-controller-operator-history
- **controller_controls_operator:** Friedlander Bernard → Highwall Mining Company Inc; 1980-09-29 to 1981-03-18; source msha-controller-operator-history
- **operator_operates_mine:** Indiana Mining Consultants → Highwall Mining Co Inc; 1981-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Smyda Chester → Highwall Mining Co Inc; 1981-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Smyda Chester → Indiana Mining Consultants; 1981-03-19 to current/open; source msha-controller-operator-history