I-29 - Exit 71 InterchangeINTERCHANGE MODIFICATION STUDY

About

INCREASING TRAFFIC IN SIOUX FALLS METROPOLITAN AREA

Due to anticipated growth and increasing traffic volumes in the southern Sioux Falls metropolitan area, the SDDOT plans to reconstruct the existing I-29 Exit 71 interchange as part of an anticipated 2028 construction project. Three interchange types have been carried forward from the I-29 Exit 62 to 73 Corridor Study completed in 2018:

  • Compressed diamond interchange
  • Single point interchange (SPI)
  • Diverging diamond interchange (DDI)

The planned 2028 project will also reconstruct I-29 mainline to a 6-lane section (3 lanes in each direction) between I-29 Exit 71 and 73. The southern limits of this 6-lane reconstruction will be determined as part of the study.

The study is a collaborative effort between the South Dakota Department of Transportation (SDDOT), Federal Highway Administration (FHWA), Sioux Falls Metropolitan Planning Organization (MPO), Lincoln County, City of Tea, and City of Harrisburg.

TIMELINE TO CONSTRUCTION

The first step of the process towards construction is the interchange and environmental study, culminating with an Interchange Modification Justification Report (IMJR) and environmental document for SDDOT to submit to FHWA. Following concurrence of the proposed modifications by FHWA, the project will move into design.

  • Interchange Study: through end of 2021
  • Environmental Study (*NEPA): up to October 2022
  • Design: 2023 - 2028

*National Environmental Policy Act (NEPA) of 1969
NEPA and Project Development Overview

This study is a collaborative effort between the SDDOT stakeholders, and the public to develop a comprehensive plan for the corridor.
South Dakota DOT FHWA Logo MPO Sioux Falls Lincoln County, SD City of Tea, a growing tradition City of Harrisburg

STUDY AREA MAP

Click to enlarge the Study Area Map below.


map of SDDOT project between 271st and 273rd street

Events

PUBLIC INFORMATION MEETINGS

Check back for upcoming public information meetings and open house events.

Public Meeting #1 Coming Soon



Upcoming Events No upcoming events planned

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BROOKINGS, SD

Tuesday, November 26, 2019
5:30 p.m. – 7:00 p.m.


Brookings City and County Government Center
Chambers Room, 310
520 3rd Street
Brookings, SD 57006

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VOLGA, SD

Tuesday, November 26, 2019
5:30 p.m. – 7:00 p.m.


Valley Fibercom
Conference Room
209 Kasan Avenue
Volga, SD 57071

Schedule

Data Collection and Analysis

FEB-JUNE 2021

Public Meeting #1

COMING SOON

Refine and Evaluate Interchange Alternatives

JUN-JULY 2021

Public Meeting #2

Sep 2021

Develop, Review and Revise IMJR

JUL-OCT 2021

Submit Final IMJR

NOV 2021

Public Meeting #3

Jan/Feb 2019

Environmental Scan

FEB-NOV 2021

Environmental Review

Dec 2021-OCT 2022

Resources

DOCUMENTS AND PAST MEETING MATERIALS

Comment

TELL US WHAT YOU THINK

You can send the study team comments, questions, or recommendations throughout the study.

Contact

USE THE COMMENT FORM BELOW OR CONTACT PROJECT MANAGEMENT WITH QUESTIONS

Steven Gramm, P.E.

SDDOT Project Manager
(605) 773-6641
steve.gramm@state.sd.us

Jon Wiegand, P.E., P.T.O.E.

Consultant Project Manager
(605) 782-8105
jonathan.wiegand@hdrinc.com

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