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South DakotaDepartment of Transportation

Aviation

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Bridges

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Highways

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Public Transit

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Railroads

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Doing Business

Certification & Accreditation

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Contractors

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Environmental

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Local Governments

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Traffic Incident Management

Training

Projects & Studies

Planning

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Programs

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Travelers

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Inside SDDOT

About SDDOT

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Of Interest

Buckle Up Phone Down SDDOT Snowplow Naming Contest Work Zone Awareness Week 2026 Graduates Other State DOTs Snowplow Blizzard Bracket

Interstate 90 Exit 46 Interchange - Piedmont

Project Home Contacts Public Involvement

SDDOT:
Jason Baker
605-209-3388

Contractor:
Heavy Constructors, Inc. of Rapid City, SD
605-342-3152

South Dakota Department of Transportation
Becker-Hansen Building
700 E. Broadway Ave.
Pierre, SD 57501

605-773-3265 (voice) 605-773-6214 (fax) Contact Us

Region & Area Offices

Region and Area Offices Aberdeen Mitchell Pierre Rapid City Maintenance Unit Map (Region/Area)

DOT Intranet

Request Public Records
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Travelers

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Forms & Publications

Brochures Forms Manuals Maps Newsletters Reports

South Dakota Department of Transportation
Becker-Hansen Building
700 E. Broadway Ave.
Pierre, SD 57501

605-773-3265 (voice) 605-773-6214 (fax) Contact Us

Interstate 90 Exit 46 Interchange - Piedmont

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Region & Area Offices

Travelers

Forms & Publications

© 2026 State of South Dakota. All Rights Reserved.