CSX Transportation Inc. is fighting a subpoena for documents about a controversial plan to rebuild a section of its rail network running through a Washington neighborhood.

CSX, represented by Gibson, Dunn & Crutcher and Sidley Austin, wants to modernize and expand the Virginia Avenue Tunnel in Capitol Hill. Residents, community groups and politicians have raised concerns about safety and quality of life issues associated with the project. A local watchdog organization that advocates on planning and transportation issues, the Committee of 100 on the Federal City, filed a lawsuit in November seeking to stop construction.