Livestock Confinement Siting in Hamilton County, Iowa

Why Hamilton County is a clean test case for the Master Matrix

Iowa's Master Matrix, established under Iowa Code Chapter 459, is a statewide scoring system that county boards of supervisors apply when a new or expanding confinement animal feeding operation requests a construction permit -- awarding points for design and siting features (manure-management practices, setback distances beyond the state minimum, odor-control measures, and similar factors) that, if a site scores high enough, the county has no legal basis to deny. In most Iowa counties, this state matrix process runs alongside a separate county zoning ordinance that may add its own conditional-use layer for agricultural structures. Hamilton County has no such zoning ordinance to layer on top -- so the matrix vote is, in effect, the entire local process a proposed confinement goes through here.

Three documented rounds: 2017, 2018, and 2022

In November 2017, local reporting described four confinement projects moving forward together through Hamilton County's review process -- an unusually active single stretch. In March 2018, the Board of Supervisors voted unanimously that a proposed site from Summit Farms LLC had scored enough points to pass the Master Matrix, despite what coverage described as real frustration on the board about the process itself; supervisors reportedly told residents with concerns to take those concerns to state legislators rather than the county, with one supervisor characterizing the county's role as essentially procedural once a site clears the matrix threshold. In July 2022, the county set a public hearing for a Master Matrix construction permit for Blue Jay Farms I, LLC, sited in Blairsburg Township about a mile north of the town of Blairsburg.

Taken together, these three rounds -- spanning five years and involving at least two different named applicant entities -- show a real, recurring pattern rather than an isolated event: Hamilton County has processed multiple hog-confinement Master Matrix applications on close to a routine basis, and the board's public statements suggest they view their own authority over whether a qualifying site can be built as limited. This research could not confirm the current operational status of every site named here, so treat this as a documented history of the process rather than a live map of every confinement currently operating in the county.

What this means if you're buying near, or planning, a confinement site

• If you're evaluating a parcel near an existing or rumored confinement site, ask Hamilton County directly (Board of Supervisors' office) whether any Master Matrix applications are pending, recently approved, or under construction near that parcel -- county-level review happens at public hearings, and past applications (Summit Farms LLC, Blue Jay Farms I LLC) show the county does track and hear these by name and township.
• Because there is no county zoning ordinance, there is no separate conditional-use permit process or zoning board of adjustment to petition if a confinement is proposed near your land -- the Master Matrix hearing before the Board of Supervisors is effectively the entire local process, and public comment happens there.
• If you're the one planning a confinement, confirm current Master Matrix scoring criteria and the minimum passing score directly with Iowa DNR's Animal Feeding Operations program, since matrix criteria and required separation distances can be updated by the state legislature.
• Ask the county Assessor whether an existing nearby confinement has affected assessed values for surrounding agricultural or residential parcels, since confinement proximity is a factor some buyers and appraisers weigh even though it does not change the Master Matrix outcome itself.
• For water-quality concerns tied to a nearby confinement's manure-management plan, Iowa DNR's Animal Feeding Operations program administers permits and complaint intake at the state level; Hamilton County Public Health's Environmental Health division is a reasonable first local contact for any private well testing near a confinement site.