{"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":"2026-10-17T05:35:58.500035+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":"2700364","name":"Boscawen Sand & Gravel"},"operator":{"type":"operator","id":"L00435","name":"Peckham Materials Corp"},"controller":{"type":"controller","id":"M00356","name":"Peckham Industries Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00356","name":"Peckham Industries Inc"},"object":{"type":"mine","id":"2700364","name":"Boscawen Sand & Gravel"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2700364|M00356|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M37476","name":"Richard D  Edmunds"},"object":{"type":"mine","id":"2700364","name":"Boscawen Sand & Gravel"},"validFrom":"1993-08-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2700364|M37476|1993-08-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L37476","name":"R D Edmunds & Sons Inc"},"object":{"type":"mine","id":"2700364","name":"Boscawen Sand & Gravel"},"validFrom":"2000-05-01","validTo":"2016-10-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2700364|L37476|2000-05-01|2016-10-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M37476","name":"Richard D  Edmunds"},"object":{"type":"operator","id":"L37476","name":"R D Edmunds & Sons Inc"},"validFrom":"2000-05-01","validTo":"2016-10-31","current":false,"derived":true,"evidenceMineId":"2700364","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2700364|L37476|2000-05-01|M37476|1993-08-01|166753"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0150653","name":"GMI Acquisition LLC"},"object":{"type":"mine","id":"2700364","name":"Boscawen Sand & Gravel"},"validFrom":"2016-11-01","validTo":"2026-03-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2700364|0150653|2016-11-01|2026-03-13"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0132841","name":"Marc  Bourgeois et al"},"object":{"type":"mine","id":"2700364","name":"Boscawen Sand & Gravel"},"validFrom":"2016-11-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2700364|0132841|2016-11-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0132841","name":"Marc  Bourgeois et al"},"object":{"type":"operator","id":"0150653","name":"GMI Acquisition LLC"},"validFrom":"2016-11-01","validTo":"2026-03-13","current":false,"derived":true,"evidenceMineId":"2700364","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2700364|0150653|2016-11-01|0132841|2016-11-01|26638"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0132841","name":"Warren  Colby et al"},"object":{"type":"operator","id":"0150653","name":"GMI Acquisition LLC"},"validFrom":"2016-11-01","validTo":"2026-03-13","current":false,"derived":true,"evidenceMineId":"2700364","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2700364|0150653|2016-11-01|0132841|2016-11-01|26639"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00435","name":"Peckham Materials Corp"},"object":{"type":"mine","id":"2700364","name":"Boscawen Sand & Gravel"},"validFrom":"2026-03-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2700364|L00435|2026-03-14|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00356","name":"Peckham Industries Inc"},"object":{"type":"operator","id":"L00435","name":"Peckham Materials Corp"},"validFrom":"2026-03-14","validTo":null,"current":true,"derived":true,"evidenceMineId":"2700364","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2700364|L00435|2026-03-14|M00356|1950-01-01|109980"}}],"coverage":{"historyRecords":4,"edgeCount":10,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2700364","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}