# Relationship history for MSHA mine 2300741

Current hierarchy: **Ronald Dale  Melton → Nemo Quarry LLC → Nemo Quarry LLC**

- 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:** Welton & Gray Gravel Company → Nemo Quarry LLC; 1950-01-01 to 1978-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Hubert  Welton → Nemo Quarry LLC; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hubert  Welton → Welton & Gray Gravel Company; 1950-01-01 to 1978-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Mc Caslin Quarry Company → Nemo Quarry LLC; 1978-10-01 to 1990-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Charles  McCaslin → Nemo Quarry LLC; 1978-10-01 to 1990-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Charles  McCaslin → Mc Caslin Quarry Company; 1978-10-01 to 1990-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Nemo Quarry → Nemo Quarry LLC; 1990-08-01 to 2006-04-09; source msha-controller-operator-history
- **controller_controls_mine:** Jerrol  Benedict → Nemo Quarry LLC; 1990-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerrol  Benedict → Nemo Quarry; 1990-08-01 to 2006-04-09; source msha-controller-operator-history
- **operator_operates_mine:** Nemo Sand Gravel and Quarry L.L.C. → Nemo Quarry LLC; 2006-04-10 to 2021-08-17; source msha-controller-operator-history
- **controller_controls_mine:** Dale Keith  Small → Nemo Quarry LLC; 2006-04-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dale Keith  Small → Nemo Sand Gravel and Quarry L.L.C.; 2006-04-10 to 2021-08-17; source msha-controller-operator-history
- **operator_operates_mine:** Nemo Quarry LLC → Nemo Quarry LLC; 2021-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mildred L Melton et al → Nemo Quarry LLC; 2021-08-18 to 2022-05-03; source msha-controller-operator-history
- **controller_controls_operator:** Mildred L Melton et al → Nemo Quarry LLC; 2021-08-18 to 2022-05-03; source msha-controller-operator-history
- **controller_controls_operator:** Ronald D Melton e al → Nemo Quarry LLC; 2021-08-18 to 2022-05-03; source msha-controller-operator-history
- **controller_controls_mine:** Ronald Dale  Melton → Nemo Quarry LLC; 2022-05-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald Dale  Melton → Nemo Quarry LLC; 2022-05-04 to current/open; source msha-controller-operator-history