# Relationship history for MSHA mine 2500896

Current hierarchy: **Curt E  Mitteis; Kreg  Mitteis → Mitteis Gravel → GLOVER PIT**

- 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:** Coutts & Sons Company → GLOVER PIT; 1950-01-01 to 1984-06-04; source msha-controller-operator-history
- **controller_controls_mine:** Terry O  Coutts  et al → GLOVER PIT; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry O  Coutts  et al → Coutts & Sons Company; 1950-01-01 to 1984-06-04; source msha-controller-operator-history
- **controller_controls_operator:** Gary O  Coutts  et al → Coutts & Sons Company; 1950-01-01 to 1984-06-04; source msha-controller-operator-history
- **operator_operates_mine:** Mitteis Gravel → GLOVER PIT; 1984-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Curt E  Mitteis et al → GLOVER PIT; 1984-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Curt E  Mitteis et al → Mitteis Gravel; 1984-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kreg  Mitteis et al → Mitteis Gravel; 1984-06-05 to current/open; source msha-controller-operator-history