| David Scott | American Council of Engineering Companies | Undecided | GA88 |
| Brad Epperly | BNSF Railway Co. | Opposing | GA88 |
| Dustin Miller | BNSF Railway Co. | Opposing | GA88 |
| Katie Graham | BNSF Railway Co. | Opposing | GA88 |
| Paula Dierenfeld | BNSF Railway Co. | Opposing | GA88 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Opposing | GA88 |
| Maison Bleam | Iowa Department of Agriculture & Land Stewardship | Undecided | GA88 |
| Doug Struyk | Iowa Drainage District Association | Supporting | GA88 |
| Jennifer Dorman | Iowa Drainage District Association | Supporting | GA88 |
| Jim Carney | Iowa Drainage District Association | Supporting | GA88 |
| John Torbert | Iowa Drainage District Association | Supporting | GA88 |
| Mona Bond | Iowa Drainage District Association | Supporting | GA88 |
| Mona Bond | Iowa Drainage District Association | Undecided | GA88 |
| David Scott | Iowa Engineering Society | Undecided | GA88 |
| Angela Davis | Iowa Environmental Council | Undecided | GA88 |
| Maddie Wilcox | Iowa Farmers Union | Undecided | GA88 |
| Threase Harms | Iowa Farmers Union | Undecided | GA88 |
| Jamie Cashman | Iowa State Association of Counties | Supporting | GA88 |
| Kristi Harshbarger | Iowa State Association of Counties | Supporting | GA88 |
| Lucas Beenken | Iowa State Association of Counties | Supporting | GA88 |
| William Peterson | Iowa State Association of Counties | Supporting | GA88 |
| Jamie Cashman | Iowa State Association of County Supervisors | Supporting | GA88 |
| Kristi Harshbarger | Iowa State Association of County Supervisors | Supporting | GA88 |
| Lucas Beenken | Iowa State Association of County Supervisors | Supporting | GA88 |
| William Peterson | Iowa State Association of County Supervisors | Supporting | GA88 |
| Brian Johnson | Polk County - Board of Supervisors | Undecided | GA88 |
| Sydney Gangestad | Two Rivers Levee & Drainage District | Supporting | GA88 |
| Tim Coonan | Two Rivers Levee & Drainage District | Supporting | GA88 |
| Michael Triplett | Union Pacific Railroad | Opposing | GA88 |
| Michael Triplett | Union Pacific Railroad | Undecided | GA88 |