{"@context":{"@vocab":"https://schema.org/"},"@type":"ItemList","@id":"https://api.morvs.ai/api/v1/msha/by-controller?name=Massachusetts%20Broken%20Stone%20Company","controller":"Massachusetts Broken Stone Company","_source":{"data_provider":"AI Analytics","brand_name":"MORVS","brand_url":"https://morvs.ai/","data_provider_url":"https://api.morvs.ai","license":"https://creativecommons.org/publicdomain/zero/1.0/","primary_source":"https://arlweb.msha.gov/OpenGovernmentData/OGIMSHA.asp","generated_at":"2026-10-04T18:35:48.429Z"},"count":3,"truncated":false,"mines":[{"mine_id":"1900012","mine_name":"Holden Trap Rock","coal_metal_ind":"M","mine_type":"Surface","mine_status":"Active","state":"MA","county_name":"Worcester","controller_name":"Massachusetts Broken Stone Company","operator_name":"Holden Trap Rock","num_employees":10,"primary_canvass":"Stone","canonical_url":"https://api.morvs.ai/mine/1900012"},{"mine_id":"1900003","mine_name":"Berlin Stone Company","coal_metal_ind":"M","mine_type":"Surface","mine_status":"Active","state":"MA","county_name":"Worcester","controller_name":"Massachusetts Broken Stone Company","operator_name":"Berlin Stone Company-Div/Mass Broken Stone Co","num_employees":3,"primary_canvass":"Stone","canonical_url":"https://api.morvs.ai/mine/1900003"},{"mine_id":"1900021","mine_name":"Weston Mine & Mill","coal_metal_ind":"M","mine_type":"Surface","mine_status":"Abandoned","state":"MA","county_name":"Middlesex","controller_name":"Massachusetts Broken Stone Company","operator_name":"Massachusetts Broken Stone Company","num_employees":null,"primary_canvass":"Stone","canonical_url":"https://api.morvs.ai/mine/1900021"}]}