# Relationship history for MSHA mine 3000088

Current hierarchy: **Dyckerhoff AG → Glens Falls Cement Company Inc → Howes Cave Terminal**

- 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:** Flintkote Cement Company → Howes Cave Terminal; 1950-01-01 to 1980-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Flintkote Company → Howes Cave Terminal; 1950-01-01 to 1980-04-06; source msha-controller-operator-history
- **controller_controls_operator:** Flintkote Company → Flintkote Cement Company; 1950-01-01 to 1980-04-06; source msha-controller-operator-history
- **operator_operates_mine:** Flintkote Company → Howes Cave Terminal; 1980-04-07 to 1981-01-04; source msha-controller-operator-history
- **controller_controls_mine:** Cimenteries Cbr Cementbedrijven → Howes Cave Terminal; 1980-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cimenteries Cbr Cementbedrijven → Flintkote Company; 1980-04-07 to 1981-01-04; source msha-controller-operator-history
- **operator_operates_mine:** Glens Falls Portland Cement Company Inc → Howes Cave Terminal; 1981-01-05 to 1988-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Moore Mc Cormack Resources Inc → Howes Cave Terminal; 1981-01-05 to 1988-07-14; source msha-controller-operator-history
- **controller_controls_operator:** Moore Mc Cormack Resources Inc → Glens Falls Portland Cement Company Inc; 1981-01-05 to 1988-07-14; source msha-controller-operator-history
- **operator_operates_mine:** Glens Falls Cement Company Inc → Howes Cave Terminal; 1988-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dyckerhoff AG → Howes Cave Terminal; 1988-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dyckerhoff AG → Glens Falls Cement Company Inc; 1988-07-15 to current/open; source msha-controller-operator-history