# Relationship history for MSHA mine 1503160

Current hierarchy: **Cemex S A → Cemex  Inc. → Kosmos Cement Co.**

- 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 Company → Kosmos Cement Co.; 1950-01-01 to 1980-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Flintkote Company → Kosmos Cement Co.; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Flintkote Company → Flintkote Company; 1950-01-01 to 1980-04-06; source msha-controller-operator-history
- **operator_operates_mine:** Flintkote Cement Company → Kosmos Cement Co.; 1980-04-07 to 1980-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Cimenteries Cbr Cementbedrijven → Kosmos Cement Co.; 1980-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cimenteries Cbr Cementbedrijven → Flintkote Cement Company; 1980-04-07 to 1980-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Kosmos Cement Company Inc → Kosmos Cement Co.; 1980-12-01 to 1988-06-26; source msha-controller-operator-history
- **controller_controls_mine:** Moore Mc Cormack Resources Inc → Kosmos Cement Co.; 1980-12-01 to 1988-06-26; source msha-controller-operator-history
- **controller_controls_operator:** Moore Mc Cormack Resources Inc → Kosmos Cement Company Inc; 1980-12-01 to 1988-06-26; source msha-controller-operator-history
- **operator_operates_mine:** Kosmos Cement Company → Kosmos Cement Co.; 1988-06-27 to 2002-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Southdown Inc → Kosmos Cement Co.; 1988-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Southdown Inc → Kosmos Cement Company; 1988-06-27 to 2002-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Kosmos Cement Co.; 1994-09-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Kosmos Cement Co.; 2000-11-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kosmos Cement Company → Kosmos Cement Co.; 2002-03-01 to 2003-02-13; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Kosmos Cement Company; 2002-03-01 to 2003-02-13; source msha-controller-operator-history
- **operator_operates_mine:** Cemex  Inc. → Kosmos Cement Co.; 2003-02-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex  Inc.; 2003-02-14 to current/open; source msha-controller-operator-history