La Crosse St. (Exit 59) in Rapid City

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Reason for Study:

The 2010 Decennial Update to the Intestate Corridor Study determined that the I-90 Exit 59 (La Crosse Street) interchange would be one of the top interchanges of the existing interchanges of South Dakota's Interstate System to target for improvement. As such, the SDDOT has recognized the need to conduct a more in depth study of the interchange's traffic operations and determine the feasibility of various improvement options for the La Crosse Street interchang

Study Limits:

The study will examine the interchange's influence area. The routes to be studied follow La Crosse Street

Public Involvement

The South Dakota Department of Transportation (SDDOT) has a long history of public involvement in the development of transportation plans and projects. The 2005 passage of the Safe, Accountable, Efficient Transportation Equity Act: A Legacy for Users (SAFETEA-LU) requires a public involvement process. In accordance with the Department's public participation document, the I-90 Exit 59 (La Crosse Street) Interchange Options Study strives to keep the public involved with the study as much as possible. Public meetings for the study will occasionally be scheduled to collect public input, provide information and answer questions.

Public Meetings

Public Meeting #1 - November 29, 2012

Public Meeting #2 - February 12, 2014

Public Meeting #3 - May 28, 2015

Business/Landowner Group Meetings

Given the commercial importance of the La Crosse Street corridor and the impact improvements along the corridor could have on businesses along the corridor, separate meetings with groups of business owners and landowners along the corridor will be held throughout the study.

To facilitate discussion within these group meetings and to keep them relative to each neighborhood, the study area has been divided into four Group Areas.

Study Advisory Team:

Given the importance of the corridor and the potential for future development within and north of the corridor’s influence area, the SDDOT has established a study advisory team to help provide input from differing points of view. The study advisory team comprises of representatives from the SDDOT, the City of Rapid City, and the Federal Highway Administration. The study advisory team will meet throughout the study period.

Interchange Modification Justification Report (IMJR)

Study Technical Memorandums:

The SDDOT has retained HDR Engineering, Inc. to perform this study. For more information or comments, please contact Jody Page of HDR by email at or by phone at (605) 791-6100. The SDDOT project manager is Steve Gramm, who can be reached by email at or by phone at (605) 773-6641.

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