{"@context":{"@vocab":"https://schema.org/"},"@type":"ItemList","@id":"https://api.morvs.ai/api/v1/msha/by-controller?name=Mississippi%20River%20Sand%20%26%20Material","controller":"Mississippi River Sand & Material","_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":"2026-10-04T15:23:01.755Z"},"count":1,"truncated":false,"mines":[{"mine_id":"2301559","mine_name":"Branch Street Dock Company","coal_metal_ind":"M","mine_type":"Facility","mine_status":"Abandoned","state":"MO","county_name":"St Louis City","controller_name":"Mississippi River Sand & Material","operator_name":"Mississippi River Sand & Material","num_employees":null,"primary_canvass":"SandAndGravel","canonical_url":"https://api.morvs.ai/mine/2301559"}]}