{"@context":{"@vocab":"https://schema.org/"},"@type":"ItemList","@id":"https://api.morvs.ai/api/v1/msha/by-controller?name=Kevin%20D%20Spierling%3B%20Ernest%20D%20Spierling%20JR%3B%20Ernest%20M%20Spierling","controller":"Kevin D Spierling; Ernest D Spierling JR; Ernest M Spierling","_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":"2026-10-08T18:23:58.774Z"},"count":1,"truncated":false,"mines":[{"mine_id":"2003680","mine_name":"Robinson Road Pit","coal_metal_ind":"M","mine_type":"Surface","mine_status":"Intermittent","state":"MI","county_name":"Emmet","controller_name":"Kevin D Spierling; Ernest D Spierling JR; Ernest M Spierling","operator_name":"Spierling Trucking & Excavating, Inc.","num_employees":4,"primary_canvass":"SandAndGravel","canonical_url":"https://api.morvs.ai/mine/2003680"}]}