{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"1900298","name":"Amherst","status":"Abandoned","status_date":"1989-08-14","mine_type":"Surface","coal_metal":"M","commodity":"Construction Sand and Gravel","state":"MA","county":"Hampshire","nearest_town":"?","operator_id":"L10670","operator_name":"Emaral Corp","controller_id":"M08106","controller_name":"Egerton Inc","district":"M2","office":"Albany NY Field Office","employees":0,"latitude":null,"longitude":null},"coverage":{"contributingSources":3,"registeredSources":20,"sourceRows":4},"relationships":{"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":"1900298","name":"Amherst"},"operator":{"type":"operator","id":"L10670","name":"Emaral Corp"},"controller":{"type":"controller","id":"M08106","name":"Egerton Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L09574","name":"Construction Service"},"object":{"type":"mine","id":"1900298","name":"Amherst"},"validFrom":"1950-01-01","validTo":"1988-09-12","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900298|L09574|1950-01-01|1988-09-12"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02199","name":"Dauphinais Albert A Et Al"},"object":{"type":"mine","id":"1900298","name":"Amherst"},"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":"1900298|M02199|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02199","name":"Dauphinais Albert A Et Al"},"object":{"type":"operator","id":"L09574","name":"Construction Service"},"validFrom":"1950-01-01","validTo":"1988-09-12","current":false,"derived":true,"evidenceMineId":"1900298","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900298|L09574|1950-01-01|M02199|1950-01-01|124262"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L10670","name":"Emaral Corp"},"object":{"type":"mine","id":"1900298","name":"Amherst"},"validFrom":"1988-09-13","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900298|L10670|1988-09-13|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08106","name":"Egerton Inc"},"object":{"type":"mine","id":"1900298","name":"Amherst"},"validFrom":"1988-09-13","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900298|M08106|1988-09-13|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08106","name":"Egerton Inc"},"object":{"type":"operator","id":"L10670","name":"Emaral Corp"},"validFrom":"1988-09-13","validTo":null,"current":true,"derived":true,"evidenceMineId":"1900298","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1900298|L10670|1988-09-13|M08106|1988-09-13|142701"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"sources":[{"id":"msha-addresses","name":"Addresses of Record","domains":["identity","logistics"],"products":["entity resolution","address history","facility geocoding"],"rowCount":1,"firstDate":"1989-08-14","lastDate":"1989-08-14","metrics":{},"periods":{},"recentRecords":[]},{"id":"msha-controller-operator-history","name":"Controller and Operator History","domains":["identity","compliance"],"products":["historical ownership attribution","operator transitions","valid-time joins"],"rowCount":2,"firstDate":"1950-01-01","lastDate":"1988-09-13","metrics":{"recentRows":0,"currentOperatorTenures":1,"completedOperatorTenures":1},"periods":{},"recentRecords":[]},{"id":"msha-mines","name":"Mines","domains":["identity","production","logistics"],"products":["mine identity","status","commodity","location","operator and controller"],"rowCount":1,"firstDate":null,"lastDate":null,"metrics":{},"periods":{},"recentRecords":[]}],"safety":{"href":"/api/v1/mines/1900298/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/1900298/silica","description":"Dedicated silica records, measurements, sample status and trends. Defaults to the snapshot year; use year=all for history."},"externalContext":{"eia":null,"title30":{"snapshot":{"chapterCount":6,"featuredSectionCount":100,"latestAmendedOn":"2026-08-14","latestIssueDate":"2026-08-14","partCount":206,"sectionCount":5954,"upToDateAsOf":"2026-08-19"},"regulations":[],"fullCorpus":"/data/title30-sections.json"}}},"meta":{"representation":"json","mineId":"1900298","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}