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. The following links provide additional information about the Master Matrix:

• Who needs the Master Matrix
  
  
• Master Matrix document (*.pdf file)
  
  
• Master Matrix Technical Advisory Committee
  
  
• Critical public areas

The following are Adobe Acrobat *.pdf files:

• Map of Counties that adopted the Construction Evaluation Resolution in 2008
  -Last Updated: January 31, 2008
  
  
• Map of Counties that adopted the Construction Evaluation Resolution in 2007
  
  
• Map of Counties that adopted the Construction Evaluation Resolution in 2006
  
  
• Map of Counties that adopted the Construction Evaluation Resolution in 2005
  
  
• Map of Counties that adopted the Construction Evaluation Resolution in 2004
  
  
• Map of Counties that adopted the Construction Evaluation Resolution in 2003
  
  
• High Quality Water Resources

County officials and staff can find more information about adopting a construction evaluation resolution on the Iowa State Association of Counties' Web site. (off-site)