{"data":{"schemaVersion":"realm.temporal-relationships.v1","temporalSemantics":{"validTime":{"granularity":"date","bounds":"inclusive","nullStart":"start date not published in the upstream history row","nullEnd":"open-ended in the upstream history row; not independent proof of present control"},"transactionTime":{"observedAt":"2026-10-13T11:19:05.459773+00:00","meaning":"time the checksum-addressed MDRS artifacts were observed by the PostgreSQL ingestion"},"derivation":{"controllerControlsOperator":"intersection of controller and operator valid-time intervals evidenced through this mine","currentIdentity":"current controller and operator are asserted only by the MDRS Mines snapshot"}},"current":{"mine":{"type":"mine","id":"1201813","name":"East Side Aggregates Inc"},"operator":{"type":"operator","id":"0177313","name":"East Side Aggregates Inc"},"controller":{"type":"controller","id":"0163061","name":"Megan M Black; Zach A Black"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00660","name":"Joseph S  Unger"},"object":{"type":"mine","id":"1201813","name":"East Side Aggregates Inc"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1201813|M00660|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06552","name":"David A  Musser"},"object":{"type":"mine","id":"1201813","name":"East Side Aggregates Inc"},"validFrom":"1950-01-01","validTo":"1990-02-04","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1201813|M06552|1950-01-01|1990-02-04"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00798","name":"Mill Creek Stone & Gravel Corp"},"object":{"type":"mine","id":"1201813","name":"East Side Aggregates Inc"},"validFrom":"1980-09-01","validTo":"1985-06-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1201813|L00798|1980-09-01|1985-06-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00660","name":"Joseph S  Unger"},"object":{"type":"operator","id":"L00798","name":"Mill Creek Stone & Gravel Corp"},"validFrom":"1980-09-01","validTo":"1985-06-30","current":false,"derived":true,"evidenceMineId":"1201813","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1201813|L00798|1980-09-01|M00660|1950-01-01|113962"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08235","name":"H & W Sand & Gravel Corp"},"object":{"type":"mine","id":"1201813","name":"East Side Aggregates Inc"},"validFrom":"1985-07-01","validTo":"1990-02-04","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1201813|L08235|1985-07-01|1990-02-04"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06552","name":"David A  Musser"},"object":{"type":"operator","id":"L08235","name":"H & W Sand & Gravel Corp"},"validFrom":"1985-07-01","validTo":"1990-02-04","current":false,"derived":true,"evidenceMineId":"1201813","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1201813|L08235|1985-07-01|M06552|1950-01-01|138759"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11626","name":"Huntington Ready Mix Inc"},"object":{"type":"mine","id":"1201813","name":"East Side Aggregates Inc"},"validFrom":"1990-02-05","validTo":"2014-01-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1201813|L11626|1990-02-05|2014-01-09"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08984","name":"James  Marcuccilli"},"object":{"type":"mine","id":"1201813","name":"East Side Aggregates Inc"},"validFrom":"1990-02-05","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1201813|M08984|1990-02-05|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08984","name":"James  Marcuccilli"},"object":{"type":"operator","id":"L11626","name":"Huntington Ready Mix Inc"},"validFrom":"1990-02-05","validTo":"2014-01-09","current":false,"derived":true,"evidenceMineId":"1201813","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1201813|L11626|1990-02-05|M08984|1990-02-05|144821"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0131914","name":"CAT EXCAVATING, INC"},"object":{"type":"mine","id":"1201813","name":"East Side Aggregates Inc"},"validFrom":"2014-01-10","validTo":"2021-07-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1201813|0131914|2014-01-10|2021-07-11"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0112201","name":"Chris A  Tyson et al"},"object":{"type":"mine","id":"1201813","name":"East Side Aggregates Inc"},"validFrom":"2014-01-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1201813|0112201|2014-01-10|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0112201","name":"Chris A  Tyson et al"},"object":{"type":"operator","id":"0131914","name":"CAT EXCAVATING, INC"},"validFrom":"2014-01-10","validTo":"2021-07-11","current":false,"derived":true,"evidenceMineId":"1201813","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1201813|0131914|2014-01-10|0112201|2014-01-10|20822"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0112201","name":"Carrie A  Tyson et al"},"object":{"type":"operator","id":"0131914","name":"CAT EXCAVATING, INC"},"validFrom":"2014-01-10","validTo":"2021-07-11","current":false,"derived":true,"evidenceMineId":"1201813","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1201813|0131914|2014-01-10|0112201|2014-01-10|20823"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0177313","name":"East Side Aggregates Inc"},"object":{"type":"mine","id":"1201813","name":"East Side Aggregates Inc"},"validFrom":"2021-07-12","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1201813|0177313|2021-07-12|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0163061","name":"Megan M Black et al"},"object":{"type":"mine","id":"1201813","name":"East Side Aggregates Inc"},"validFrom":"2021-07-12","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1201813|0163061|2021-07-12|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0163061","name":"Megan M Black et al"},"object":{"type":"operator","id":"0177313","name":"East Side Aggregates Inc"},"validFrom":"2021-07-12","validTo":null,"current":true,"derived":true,"evidenceMineId":"1201813","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1201813|0177313|2021-07-12|0163061|2021-07-12|34162"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0163061","name":"Zach A Black et al"},"object":{"type":"operator","id":"0177313","name":"East Side Aggregates Inc"},"validFrom":"2021-07-12","validTo":null,"current":true,"derived":true,"evidenceMineId":"1201813","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1201813|0177313|2021-07-12|0163061|2021-07-12|34163"}}],"coverage":{"historyRecords":7,"edgeCount":17,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1201813","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}