# Relationship history for MSHA mine 3000935

Current hierarchy: **Michael  Dendis; Anthony  Dendis; Joe  Dendis → Dendis Sand & Gravel, Inc. → Oaks Corners 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:** Elderlee Inc → Oaks Corners Pit; 1950-01-01 to 1989-12-27; source msha-controller-operator-history
- **controller_controls_mine:** H J Williams Company Inc → Oaks Corners Pit; 1950-01-01 to 1989-12-27; source msha-controller-operator-history
- **controller_controls_operator:** H J Williams Company Inc → Elderlee Inc; 1950-01-01 to 1989-12-27; source msha-controller-operator-history
- **controller_controls_mine:** Joseph  Spezio → Oaks Corners Pit; 1981-11-18 to 2013-05-05; source msha-controller-operator-history
- **operator_operates_mine:** Tcg Materials (New York) Inc → Oaks Corners Pit; 1989-12-28 to 1995-01-04; source msha-controller-operator-history
- **controller_controls_mine:** Needler Group → Oaks Corners Pit; 1989-12-28 to 1999-07-13; source msha-controller-operator-history
- **controller_controls_operator:** Needler Group → Tcg Materials (New York) Inc; 1989-12-28 to 1995-01-04; source msha-controller-operator-history
- **operator_operates_mine:** Elam Sand & Gravel Corp → Oaks Corners Pit; 1995-01-05 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Spezio → Elam Sand & Gravel Corp; 1995-01-05 to 2013-05-05; source msha-controller-operator-history
- **controller_controls_mine:** Joe  Dendis → Oaks Corners Pit; 1997-06-01 to 2024-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Loretta J  Spezio → Oaks Corners Pit; 2013-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Loretta J  Spezio → Elam Sand & Gravel Corp; 2013-05-06 to 2015-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Dendis Sand & Gravel, Inc. → Oaks Corners Pit; 2015-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joe  Dendis → Dendis Sand & Gravel, Inc.; 2015-07-10 to 2024-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Anthony  Dendis et al → Oaks Corners Pit; 2025-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anthony  Dendis et al → Dendis Sand & Gravel, Inc.; 2025-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joe  Dendis et al → Dendis Sand & Gravel, Inc.; 2025-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Dendis et al → Dendis Sand & Gravel, Inc.; 2025-01-01 to current/open; source msha-controller-operator-history