Minimum Distance Separation and Land Base Calculator

This calculator is provided to help operators estimate the minimum distance separation (MDS) for their confined feeding operation. The final calculation is determined by the approval officer when the Part 1 application is submitted to the NRCB. The calculator is not able to deal with every different combination of livestock and permitting threshold. If you have questions related to your MDS please contact an approval officer at the NRCB field office closest to you.

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For other livestock categories, please contact the NRCB directly.
1. Agricultural Purposes
MDS: MDS with expansion factor*:
2. Non-Agricultural Purposes
MDS: MDS with expansion factor*:
3. High Use Recreational or Commercial Purposes
MDS: MDS with expansion factor*:
4. Large Scale Country Residential, Rural, Hamlet, Village, Town or City
MDS: MDS with expansion factor*:

* The expansion factor can only be used if 3 or more years have passed since the completion of the most recent construction arising out of an AOPA permit