Infrastructure and Energy Alternatives, Inc.

6325 Digital Way

Suite 460

Indianapolis, IN 46278

Tel (800) 688 3775

Tel (317) 210 9550

www.iea.net

May 3, 2021

VIA EDGAR

United States Securities and Exchange Commission

Division of Corporation Finance – Office of Real Estate and Construction

100 F Street, N.E.

Washington, D.C. 20549

Attention: Ronald E. Alper

Re:    Infrastructure and Energy Alternatives, Inc.

Registration Statement on Form S-3

Filed April 7, 2021

File No. 333-255097

Acceleration Request

Requested Date: May 5, 2021

Requested Time: 4:00 PM Eastern Time

Ladies and Gentlemen:

Pursuant to Rule 461 of the Securities Act of 1933, as amended, the undersigned registrant hereby requests that the Securities and Exchange Commission accelerate the effective date of the above-captioned registration statement to May 5, 2021 at 4:00 PM, Eastern Time, or as soon thereafter as may be practicable.

If you have any questions regarding the foregoing, please do not hesitate to contact Clint Smith of Jones Walker LLP at (504) 582-8429.

Sincerely,

Infrastructure and Energy Alternatives, Inc.

/s/ Gil Melman

By:    Gil Melman

Title:    Executive Vice President, Corporate Secretary, General Counsel and Chief Compliance Officer

cc:    Clint Smith, Jones Walker LLP