{"database": "openregs", "table": "federal_register", "rows": [["2017-20958", "Proposed Revocation of Class E Airspace; Centerville, MD", "Proposed Rule", "This action proposes to remove Class E airspace extending upward from 700 feet above the surface at Centerville, MD. Because the Maryland State Police Trooper 6 Heliport has moved, controlled airspace is no longer required at this location. Another rulemaking will be forthcoming establishing controlled airspace at the heliport's new location.", "2017-10-02", 2017, 10, "https://www.federalregister.gov/documents/2017/10/02/2017-20958/proposed-revocation-of-class-e-airspace-centerville-md", "https://www.govinfo.gov/content/pkg/FR-2017-10-02/pdf/2017-20958.pdf", "Transportation Department; Federal Aviation Administration", "492,159", "This action proposes to remove Class E airspace extending upward from 700 feet above the surface at Centerville, MD. Because the Maryland State Police Trooper 6 Heliport has moved, controlled airspace is no longer required at this location. Another...", null]], "columns": ["document_number", "title", "type", "abstract", "publication_date", "pub_year", "pub_month", "html_url", "pdf_url", "agency_names", "agency_ids", "excerpts", "regulation_id_numbers"], "primary_keys": ["document_number"], "primary_key_values": ["2017-20958"], "units": {}, "query_ms": 23.86673493310809, "source": "Federal Register API & Regulations.gov API", "source_url": "https://www.federalregister.gov/developers/api/v1", "license": "Public Domain (U.S. Government data)", "license_url": "https://www.regulations.gov/faq"}