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
• Some limited services to specific UW locations - (See Inter-D Routes)
• City of Madison/Dane County government
• 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:

Agency / Division / Bureau / Etc.	Interdepartmental Location
Board of Bar Examiners	110 East Main Street, Suite 715
Board on Aging and Long Term Care	1402 Pankratz
Bureau of Social Security Disability Insurance	722 Williamson Street
Capitol Heating Plant	624 East Main Street
Children's Trust Fund	110 East Main Street, Suite 810
Commissioners of Public Lands Board	101 East Wilson Street
Consolidated Court Automation Programs	110 East Main Street, Suite 500
Department of Administration	101 East Wilson Street
Department of Agriculture, Trade and Consumer Protection	4702 University Avenue
Department of Agriculture, Trade and Consumer Protection (Prairie Oak State Office Building)	2811 Agriculture Drive
Department of Agriculture, Trade and Consumer Protection	3601 Galleon Run
Department of Children and Families	201 East Washington Avenue
Department of Corrections	3099 East Washington Avenue
Department of Corrections	512 East Washington Avenue
Department of Corrections	2565 East Johnson Street
Department of Corrections	818 West Badger Road
Department of Corrections	5706 Odana Road
Department of Employee Trust Funds	801 West Badger Road
Department of Financial Institutions	201 West Washington Avenue
Department of Health Services	1 West Wilson Street
Department of Justice	17 West Main Street
Department of Justice	4706 University Avenue
Department of Justice	2445 Darwin Road
Department of Military Affairs	2400 Wright Street
Department of Natural Resources	101 South Webster Street
Department of Natural Resources	3911 Fish Hatchery
Department of Natural Resources	2801 Progress Road
Department of Natural Resources	2421 Darwin Road
Department of Public Instruction	125 South Webster Street
Department of Revenue	2135 Rimrock Road
Department of Safety and Professional Services	1400 East Washington Avenue
Department of Tourism	201 West Washington Avenue
Department of Transportation	2001 Bartillon
Department of Transportation	3623 Pierstorff
Department of Transportation	4802 Sheboygan Avenue
Department of Transportation	2101 Wright Street
Department of Transportation	3502 Kinsman Street
Department of Veterans Affairs	201 West Washington Avenue
Department of Workforce Development	201 East Washington Avenue
Director of State Courts	110 East Main Street, Suite 410
Disabled Veterans Program	101 East Wilson Street
Division of Enterprise Technology - Data Center	5830 Femrite Drive
Division of Gaming	3319 West Beltline Highway
Division of Hearings and Appeals	5005 University Avenue
Document Sales & Distribution	4622 University Avenue
Educational Approval Board	201 West Washington Avenue
Educational Communications Board	3319 West Beltline Highway
Employment Relations Commission	1457 East Washington Avenue
Government Accountability Board	212 East Washington Avenue
Higher Educational Aids Board	131 West Wilson Street
Hill Farms Heating Plant	4622 University Avenue
Judicial Commission	110 East Main Street, Suite 700
Judicial Council	110 East Main Street, Suite 822
Legislative Audit Bureau	22 East Mifflin Street
Legislative Council	1 East Main Street, Suite 400
Legislative Fiscal Bureau	1 East Main Street, Suite 300
Legislative Reference Bureau	1 East Main Street, Suite 200
Legislative Technology Services Bureau	17 West Main Street
Medical Mediation Panels	110 East Main Street, Suite 710
Office of Court Commissioners	110 East Main Street, Suite 440
Office of Energy Independence	101 East Wilson Street
Office of Governor	115 East Capitol
Office of Insurance Commissioner	125 South Webster Street
Office of Judicial Education	110 East Main Street, Suite 200
Office of Justice Assistance	1 South Pinckney, Suite 615
Office of Lawyer Regulation	110 East Main Street, Suite 2315
Office of State Employment Relations	101 East Wilson Street
Office of the Commissioner Railroads	610 N. Whitney Way, Suite 110
Office of the Lieutenant Governor	119 East Capitol
Office of the Secretary of State	30 West Mifflin Street, 10th Floor
Office of the State Treasurer	1 South Pinckney
Public Records Board	4622 University Avenue
Public Service Commission	610 North Whitney Way
Reference & Loan Library	2109 South Stoughton Road
Retirement Research & Court Operations	110 East Main Street, Suite 430
State Historical Society	816 State Street
State of Wisconsin Investment Board	121 East Wilson Street
State Records Center	4622 University Avenue
Supreme Court/Court of Appeals	110 East Main Street, Suite 215
Tax Appeals Commission	5005 University Avenue
University of Wisconsin - Madison / Administrative	333 East Campus Mall
University of Wisconsin - Madison / Arboretum	1207 Seminole Highway
University of Wisconsin - Madison / Mailroom	45 North Charter Street
University of Wisconsin - Madison / Memorial Library	728 State Street
University of Wisconsin - Madison / Sports	25 North Breese Terrace
University of Wisconsin - Madison / Tandem Press	201 South Dickinson Street
Wisconsin Air Services	3400 Miller Street
Wisconsin Arts Board	201 West Washington Avenue
Wisconsin Assembly	2 East Main Street (East, West or North Wing)
Wisconsin Board for People with Developmental Disabilities	101 E. Wilson Street
Wisconsin Capitol Police	B2 North State Capitol
Wisconsin Central Fleet Services	201 South Dickinson Street
Wisconsin Court of Appeals	10 East Doty, Suite 700
Wisconsin Emergency Management	2400 Wright Street
Wisconsin Geological and Natural History Survey	3817 Mineral Point Road
Wisconsin Historical Museum	30 North Carroll Street
Wisconsin Housing and Economic Development Authority	201 West Washington Avenue
Wisconsin Senate	2 East Main Street, South Wing
Wisconsin State Laboratory of Hygiene	2601 Agriculture Drive
Wisconsin State Laboratory of Hygiene	2810 Walton Commons West
Wisconsin State Law Library	120 Martin Luther King, Jr. Boulevard
Wisconsin State Public Defender	315 North Henry Street, 2nd Floor
Wisconsin State Public Defender - Madison Appellate	17 South Fairchild, 3rd Floor
Wisconsin State Public Defender - Madison Trial	17 South Fairchild, 2nd Floor
Wisconsin Technical College System	4622 University Avenue
Wisconsin Van Pool	201 South Dickinson Street
Wisconsin Veterans Museum	30 West Mifflin Street
Women's Minority Business Program	101 East Wilson Street