The master matrix is a scoring system that can be used to evaluate the siting of permitted confinement feeding operations. Counties that have adopted a construction evaluation resolution can use the master matrix. Counties must re-adopt the construction evaluation resolution annually between January 1 and January 31, starting in 2004, to continue to use the master matrix.

Producers in counties that have adopted the matrix must meet higher standards than other permitted facilities. Before they can be approved for construction, they must earn points on the master matrix for choosing sites and using practices that reduce adverse impacts on the environment and the community. Producers must have 50% (440 points minimum) of the total score and at least 25% of the available points in each of the three subcategories of air, water and community impacts to pass the master matrix...."

Scott County happens to be one of the many counties that has chosen to partake in the permit process. ( Its Board of Supervisors has agreeded to this every year since 2004.) .  Part of what that means is that if a farmer wants to build new or add to their existing operation, a permit may be needed depending on the total number pigs, cattle, etc said farmer is going to raise.  There is a formula that says if you have over 1666 animal units (thats one bovine equals one unit, 2.5 hogs equals one unit....see IDNR site for other animals) they you need to fill out the Master Matrix.  If your county does not partake in the permit process, it goes directly to the IDNR and bypasses any local public input time.