{"@context":{"@vocab":"https://schema.org/"},"@type":"ItemList","@id":"https://api.morvs.ai/api/v1/msha/by-controller?name=Hughes%20Tool%20Company%3B%20W%20R%20Grace%20%26%20Company","controller":"Hughes Tool Company; W R Grace & 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":"2026-10-06T11:57:29.769Z"},"count":4,"truncated":false,"mines":[{"mine_id":"1600979","mine_name":"Munsun Slip Mills","coal_metal_ind":"M","mine_type":"Facility","mine_status":"Abandoned","state":"LA","county_name":"Terrebonne","controller_name":"Hughes Tool Company; W R Grace & Company","operator_name":"Hughes Drilling Fluids","num_employees":null,"primary_canvass":"Nonmetal","canonical_url":"https://api.morvs.ai/mine/1600979"},{"mine_id":"4102573","mine_name":"Galena Park Mill","coal_metal_ind":"M","mine_type":"Facility","mine_status":"Abandoned","state":"TX","county_name":"Harris","controller_name":"Hughes Tool Company; W R Grace & Company","operator_name":"Hughes Drilling Fluids","num_employees":null,"primary_canvass":"Nonmetal","canonical_url":"https://api.morvs.ai/mine/4102573"},{"mine_id":"4103113","mine_name":"Sheldon Road Plant","coal_metal_ind":"M","mine_type":"Facility","mine_status":"Abandoned","state":"TX","county_name":"Harris","controller_name":"Hughes Tool Company; W R Grace & Company","operator_name":"Hughes Drilling Fluids","num_employees":null,"primary_canvass":"Nonmetal","canonical_url":"https://api.morvs.ai/mine/4103113"},{"mine_id":"4103152","mine_name":"Kingsville","coal_metal_ind":"M","mine_type":"Facility","mine_status":"Abandoned","state":"TX","county_name":"Kleberg","controller_name":"Hughes Tool Company; W R Grace & Company","operator_name":"Hughes Drilling Fluids","num_employees":null,"primary_canvass":"Nonmetal","canonical_url":"https://api.morvs.ai/mine/4103152"}]}