{"@context":{"@vocab":"https://schema.org/"},"@type":"ItemList","@id":"https://api.morvs.ai/api/v1/msha/by-controller?name=Walnut%20Hill%20Sand%20%26%20Gravel","controller":"Walnut Hill Sand & Gravel","_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":"2026-10-06T21:23:17.997Z"},"count":1,"truncated":false,"mines":[{"mine_id":"1700352","mine_name":"Walnut Hill Pit","coal_metal_ind":"M","mine_type":"Surface","mine_status":"Abandoned","state":"ME","county_name":"Cumberland","controller_name":"Walnut Hill Sand & Gravel","operator_name":"Walnut Hill Sand & Gravel","num_employees":null,"primary_canvass":"SandAndGravel","canonical_url":"https://api.morvs.ai/mine/1700352"}]}