EPA's Non-Title air permits and supporting documents for Knife River Inc. Portable Hot Mix Asphalt Plants at Astec, CMI and Gencor.

• Knife River (Astec) Non-Title V Permit and Technical Support Document (PDF)(51 pp, 1 MB)
• Knife River (CMI) Non-Title V Permit and Technical Support Document (PDF)(46 pp, 1 MB)
• Knife River (Gencor) Non-Title V Permit and Technical Support Document (PDF)(53 pp, 2 MB)