D.C. Code § 34-1401
The Mayor of the District of Columbia may authorize any electric light company existing June 11, 1896, to construct and use under such regulations as the Council of the District of Columbia may fix conduits for the reception of overhead wires existing on said date within the territory formerly known as Georgetown, and to extend the same by an aggregate of not more than one and one-fourth miles of conduit in the same territory. And the United States Electric Lighting Company may extend its underground conduits and wires east of Rock Creek and within the fire limits to Mount Pleasant, and Washington and Columbia Heights under such regulations as the Council may prescribe.
D.C. Code § 34-1401
Highways, streets and bridges, authorization to electrify railroad lines, conduit systems, see §§ 9-1207.01 and 9-1207.03. Inspections, electrical power, see §§ 2-131 and 2-132. Private conduits, generally, see § 34-2501 et seq. Public roads and bridges, jurisdiction in mayor, see § 9-101.02. .