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Mail Transportation Services (Inter-D)

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Division of Enterprise Operations
Inter-D Home Page
Common Questions
U.S. Postal Service

The Mail Transportation Services Unit (or Inter-D) is part of the Bureau of Enterprise Fleet and offers several services to State government agencies located in Madison. The Inter-D Mail Unit sorts incoming USPS and State agency Inter-D mail and distributes to those agencies throughout the city. The Inter-D Mail unit and the UW-Madison programs interface for the transfer of mail and materials between the two entities. The University of Wisconsin-Madison is a separate organization and maintains their own Inter-D mail unit, servicing most UW-Madison facilities. The Inter-D system also connects with the following systems to provide a wide network of hard copy communications and material transfers:
  • UW Hospital and Clinics via UW-Madison  
  • City of Madison/Dane County government - See "City of Madison and Dane County Locations"
  • South Central Library System 
  • State Office Building in Milwaukee at 819 N 6th St., via Department of Transportation 
  • Central Wisconsin Center for the Developmentally Disabled at 317 Knutson Drive, via Department of Health Services
  • Mendota Mental Health Institute at 301 Troy Drive, via Department of Health Services

If you have questions about suspicious mail or packages contact the State Capital Police or UW-Madison Police.

Locations Serviced by the Mail Transportation Services (Inter-D) Unit

Mail Transportation Services (Inter-D)
Mailroom: 608-224-5168 • Supervisor:608-224-5031