D.C. Code § 9-302
Appropriations made after June 7, 1924, for the construction and repair of bridges shall be available for repairing, when necessary, any bridge carrying a public street over the right-of-way or property of any railway company, or for constructing, reconstructing, or repairing in such manner as shall in the judgment of the Mayor of the District of Columbia be necessary reasonably to accommodate public traffic, any bridge required to carry or carrying such traffic in a public street over the right-of-way or property of any canal company operating as such in the District of Columbia, on the neglect or refusal of such railway or canal company to do such work when notified and required by the Mayor, and the amounts thus expended shall be a valid and subsisting lien against the property of such railway company or of such canal company, and shall be collected from such railway company or from such canal company in the manner provided in § 9-401.01, and shall be deposited in the Treasury to the credit of the General Fund of the District of Columbia in the manner provided by law.
D.C. Code § 9-302
Railroad companies, construction and maintenance of track and track-related facilities, see §§ 9-1201.10 to 9-1201.12, 9-1201.15, and 9-1203.06 et seq. Railroad crossings, see § 9-1201.14. .