| Brad Epperly | BNSF Railway Co. | Opposing | GA90 |
| Dustin Miller | BNSF Railway Co. | Opposing | GA90 |
| Jefferson Fink | Boone and Scenic Valley Railroad | Opposing | GA90 |
| Jim Obradovich | Boone and Scenic Valley Railroad | Opposing | GA90 |
| Jefferson Fink | Burlington Junction Railway | Opposing | GA90 |
| Jim Obradovich | Burlington Junction Railway | Opposing | GA90 |
| Kate Walton | CN Rail | Opposing | GA90 |
| Madeleine Bradley | CN Rail | Opposing | GA90 |
| Matt Eide | CN Rail | Opposing | GA90 |
| Jefferson Fink | Davenport Industrial Railroad | Opposing | GA90 |
| Jim Obradovich | Davenport Industrial Railroad | Opposing | GA90 |
| Chelsea Hoye | Des Moines Water Works | Undecided | GA90 |
| Nick Laning | Des Moines Water Works | Undecided | GA90 |
| Threase Harms | Des Moines Water Works | Undecided | GA90 |
| John Hirl | Ducks Unlimited, Inc. | Undecided | GA90 |
| Marc Beltrame | Ducks Unlimited, Inc. | Undecided | GA90 |
| Kellie Paschke | Iowa Cattlemen's Association | Undecided | GA90 |
| Kelly Meyers | Iowa Cattlemen's Association | Undecided | GA90 |
| Troy Skinner | Iowa Cattlemen's Association | Undecided | GA90 |
| Lyle Brehm | Iowa County Engineers Association | Undecided | GA90 |
| Doug Struyk | Iowa Drainage District Association | Supporting | GA90 |
| Doug Struyk | Iowa Drainage District Association | Undecided | GA90 |
| Jennifer Dorman | Iowa Drainage District Association | Supporting | GA90 |
| Jennifer Dorman | Iowa Drainage District Association | Undecided | GA90 |
| Jim Carney | Iowa Drainage District Association | Supporting | GA90 |
| Jim Carney | Iowa Drainage District Association | Undecided | GA90 |
| John Torbert | Iowa Drainage District Association | Supporting | GA90 |
| John Torbert | Iowa Drainage District Association | Undecided | GA90 |
| Mona Bond | Iowa Drainage District Association | Supporting | GA90 |
| Mona Bond | Iowa Drainage District Association | Undecided | GA90 |
| Chelsea Hoye | Iowa Environmental Council | Undecided | GA90 |
| Threase Harms | Iowa Environmental Council | Undecided | GA90 |
| Chelsea Hoye | Iowa Farmers Union | Undecided | GA90 |
| Threase Harms | Iowa Farmers Union | Undecided | GA90 |
| Jefferson Fink | Iowa Interstate Railroad | Opposing | GA90 |
| Jim Obradovich | Iowa Interstate Railroad | Opposing | GA90 |
| Mike Heller | Iowa State Association of Assessors | Undecided | GA90 |
| Kellie Paschke | Marion County Board of Supervisors | Undecided | GA90 |
| Kelly Meyers | Marion County Board of Supervisors | Undecided | GA90 |
| Troy Skinner | Marion County Board of Supervisors | Undecided | GA90 |
| Jefferson Fink | Patriot Rail (Keokuk Junction Railway) | Opposing | GA90 |
| Jim Obradovich | Patriot Rail (Keokuk Junction Railway) | Opposing | GA90 |
| Sydney Gangestad | Two Rivers Levee & Drainage District | Supporting | GA90 |
| Tim Coonan | Two Rivers Levee & Drainage District | Supporting | GA90 |
| Michael Triplett | Union Pacific Railroad | Opposing | GA90 |