Current letting schedule

The current letting schedule provides the list of current bid opportunities made available by the Purchasing Section of the Iowa DOT. This site contains bid opportunities for facility improvement projects, miscellaneous large and small equipment, vehicles miscellaneous goods and services. There are two types of bid solicitation. The method used is determined by Iowa Administrative Code based on the cost of purchase as defined herein.
  • 1. Formal
    A formal, sealed bid procedure is used for purchase of goods and/or services exceeding $50,000.00.

  • 2. Informal
    An Informal bid procedure is used for purchase of goods and/or services less than $50,000.00.

  • Request for Information
    (RFI) may be sought by the Department at any time for purposes of seeking industry knowledge of products or services.
Pertinent information regarding the bid solicitation along with links to all associated presented below in three different categories; Formal, Informal or RFI.

All correspondence, documents, addendums or other pertinent information will be posted below for each bid opportunity. Bidders will be required to visit this website periodically fo all updates. This information will no longer be sent to respective bidders once the bid proposal has been posted.

Please use the furnished mailing label included in each bid proposal, or include  “Iowa Department of Transportation, proposal number & letting date” on the outside of the return envelope.

Construction projects

The Iowa DOT's Purchasing Section will no longer provide plan holders lists of potential prime contractors. Sets of plans and specifications for construction projects are now attached to the bid opportunity located on this website. To the fullest extent possible, plan rooms will be utilized statewide for bidders to have the ability to print bid proposals, plans and specifications. Potential bidders will not be made available prior to the bid opening for projects.

For your convenience, the following link will route you directly to State of Iowa, Information Security Office website.

Terms and conditions

All bid proposals are subject to terms and conditions as required.
PDF file Formal Standard Terms and Conditions

PDF file Informal Standard Terms and Conditions


Bid Proposal No. Bid Proposal Description Letting Date Proposal Guaranty Required Email Agent

ADA Accessible Heavy Duty Buses


Addendum 1

Addendum 2

Addendum 3

Questions and Responses Set 1

Questions and Responses Set 2

Questions and Responses Set 3

Questions and Responses Set 4


REVISED Letting Date: July 29, 2015

None Zachary Gillen

Hoop building located at Des Moines North Maintenance facility


Advance Notice

Mandatory Pre-Bid: Meeting scheduled for July 13, 2015 at 1:00 p.m. Location 1530 NE 53rd Ave. Des Moines, IA 50313.

Addendum 1

Addendum 1 plan

Questions and Responses Set 1




7/29/2015 $10,000.00 Jody McNaughton
14740 Raven Components 8/5/2015 None

Jean Gustafson



Warehouse Tuck Pointing project

Addendum 1

Questions and Answers Set 1

Addendum 2

Addendum 3

8/5/2015 $5,500.00 Jody McNaughton
14523 VIN Data for Vehicle System 8/5/2015 None Renee Shirley
14551 Electrical Products and Batteries 8/12/2015 None Jean Gustafson

Sand (Aggregate for Ice Control) FY2016


8/19/2015 None Laura Linduski

Electrical Upgrades for Newton



8/19/2015 $7,600.00 Rhonda Ruark

Electrical Upgrades for Dyersville



8/19/2015 $7,900.00 Rhonda Ruark

Council Bluffs Interstate System - Fiber Optic


Special Provisions

8/19/2015 None Zachary Gillen
14860 Statewide Roadway Data Collection Services 10/7/2015 None Renee Shirley
14802 Next Generation GPS/AVL System 8/19/2015 None Renee Shirley


Bid Proposal No. Bid Proposal Description Letting Date Proposal Guaranty Required Email Agent


Bid Proposal No. Bid Proposal Description Letting Date Proposal Guaranty Required Email Agent

Notice to all vendors:
All bid solicitations are subject to change. It is the responsibility of the vendor to check this Web site for any future addendums, questions, revisions, etc., prior to the bid opening. Failure to do so will be the responsibility of the vendor.

Please contact the listed agent above for any questions.
For more information about the purchasing agents and their assigned commodities, please click here.

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This page is maintained by Laura Linduski, Iowa DOT Purchasing