{"@context":{"@vocab":"https://schema.org/"},"@type":"ItemList","@id":"https://api.ai-analytics.org/api/v1/msha/by-controller?name=Springfield%20Underground%2C%20Inc.%20DBA%20Erlen%20Group","controller":"Springfield Underground, Inc. DBA Erlen Group","_source":{"data_provider":"AI Analytics","data_provider_url":"https://api.ai-analytics.org","license":"https://creativecommons.org/publicdomain/zero/1.0/","primary_source":"https://arlweb.msha.gov/OpenGovernmentData/OGIMSHA.asp","generated_at":"2026-09-15T20:11:35.709Z"},"count":3,"truncated":false,"mines":[{"mine_id":"2302440","mine_name":"Radix Westside","coal_metal_ind":"M","mine_type":"Underground","mine_status":"Active","state":"MO","county_name":"Greene","controller_name":"Springfield Underground, Inc. DBA Erlen Group","operator_name":"Radix Quarries","num_employees":18,"primary_canvass":"Stone","canonical_url":"https://api.ai-analytics.org/mine/2302440"},{"mine_id":"2300954","mine_name":"Radix Joplin","coal_metal_ind":"M","mine_type":"Surface","mine_status":"Active","state":"MO","county_name":"Jasper","controller_name":"Springfield Underground, Inc. DBA Erlen Group","operator_name":"Radix Quarries","num_employees":9,"primary_canvass":"Stone","canonical_url":"https://api.ai-analytics.org/mine/2300954"},{"mine_id":"0301232","mine_name":"Radix Quarries","coal_metal_ind":"M","mine_type":"Surface","mine_status":"Active","state":"AR","county_name":"Carroll","controller_name":"Springfield Underground, Inc. DBA Erlen Group","operator_name":"Radix Carroll County","num_employees":4,"primary_canvass":"Stone","canonical_url":"https://api.ai-analytics.org/mine/0301232"}]}