{"@context":{"@vocab":"https://schema.org/"},"@type":"ItemList","@id":"https://api.ai-analytics.org/api/v1/msha/by-controller?name=Thomas%20H%20Nelson","controller":"Thomas H Nelson","_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":"2026-09-10T22:58:34.102Z"},"count":1,"truncated":false,"mines":[{"mine_id":"3302921","mine_name":"Nelson Sand & Gravel Incorporated","coal_metal_ind":"M","mine_type":"Surface","mine_status":"Abandoned","state":"OH","county_name":"Ashtabula","controller_name":"Thomas H Nelson","operator_name":"Nelson Sand & Gravel Inc","num_employees":0,"primary_canvass":"SandAndGravel","canonical_url":"https://api.ai-analytics.org/mine/3302921"}]}