| Brad Epperly | BNSF Railway Co. | Opposing | GA89 |
| Brad Epperly | BNSF Railway Co. | Undecided | GA89 |
| Dustin Miller | BNSF Railway Co. | Opposing | GA89 |
| Dustin Miller | BNSF Railway Co. | Undecided | GA89 |
| Jim Obradovich | Burlington Junction Railway | Opposing | GA89 |
| Robert Mulqueen | Burlington Junction Railway | Opposing | GA89 |
| Kate Walton | CN Rail | Opposing | GA89 |
| Matt Eide | CN Rail | Opposing | GA89 |
| Nick Laning | Des Moines Water Works | Undecided | GA89 |
| Threase Harms | Des Moines Water Works | Undecided | GA89 |
| Michael Triplett | Iowa Alliance of Surety Companies | Opposing | GA89 |
| Jennifer Kingland | Iowa Association of Realtors | Undecided | GA89 |
| Lyle Brehm | Iowa County Engineers Association | Undecided | GA89 |
| Doug Struyk | Iowa Drainage District Association | Opposing | GA89 |
| Jennifer Dorman | Iowa Drainage District Association | Opposing | GA89 |
| Jim Carney | Iowa Drainage District Association | Opposing | GA89 |
| John Torbert | Iowa Drainage District Association | Opposing | GA89 |
| John Torbert | Iowa Drainage District Association | Withdrawn | GA89 |
| John Torbert | Iowa Drainage District Association | Undecided | GA89 |
| Mona Bond | Iowa Drainage District Association | Opposing | GA89 |
| Mona Bond | Iowa Drainage District Association | Undecided | GA89 |
| Angela Davis | Iowa Environmental Council | Undecided | GA89 |
| Hannah McDowell | Iowa Farmers Union | Undecided | GA89 |
| Nick Laning | Iowa Farmers Union | Undecided | GA89 |
| Threase Harms | Iowa Farmers Union | Undecided | GA89 |
| Blake DeRouchey | Iowa Homeland Security & Emergency Management Div. | Undecided | GA89 |
| Jim Obradovich | Iowa Interstate Railroad | Opposing | GA89 |
| Jim Obradovich | Iowa Interstate Railroad | Undecided | GA89 |
| Robert Mulqueen | Iowa Interstate Railroad | Opposing | GA89 |
| Brad Epperly | Iowa Newspaper Association | Undecided | GA89 |
| Dustin Miller | Iowa Newspaper Association | Undecided | GA89 |
| Dane Schumann | Jensen Farms | Undecided | GA89 |
| Jim Obradovich | Progressive Rail Iowa (Iowa Traction RR and Iowa Southern RR) | Opposing | GA89 |
| Robert Mulqueen | Progressive Rail Iowa (Iowa Traction RR and Iowa Southern RR) | Opposing | GA89 |
| Michael Triplett | Union Pacific Railroad | Opposing | GA89 |