On November 13, 2020, EPA Region 10 received from Knife River Corporation - Mountain West a request for coverage under the general air quality permit for new or modified minor source hot mix asphalt plants in Indian Country (HMA General Permit) for a portable plant at the Hasselstrom Pit, Winchester, Idaho on the Nez Perce Reservation.
This application is pending Region 10 review and approval. If you have concerns about the applicant’s eligibility to construct under the HMA General Permit, please contact:
208-378-5759
Air and Radiation Division
950 W Bannock St, Suite 900
Application Documents
You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.- knife_river_corporation_mountain_west_hma_plant_request_for_coverage.pdf (PDF)(25 pp, 716 K)
- knife_river_corporation_mountain_west_hma_plant_07_13_20_cultural_clearance.pdf (PDF)(22 pp, 3 MB)
- knife_river_corporation_mountain_west_hma_plant_appendix_a_letter.pdf (PDF)(3 pp, 163 K)
- knife_river_corporation_mountain_west_hma_plant_cover_letter.pdf (PDF)(1 pg, 120 K)
- knife_river_corporation_mountain_west_hma_plant_fws_response.pdf (PDF)(2 pp, 142 K)
- knife_river_corporation_mountain_west_hma_plant_noaa_response.pdf (PDF)(2 pp, 160 K)
- knife_river_corporation_mountain_west_hma_plant_silene_clearance_report_10_19_20.pdf (PDF)(3 pp, 579 K)
- knife_river_corporation_mountain_west_hma_plant_tribe_cultural_response.pdf (PDF)(2 pp, 139 K)
- knife_river_corporation_mountain_west_hma_plant_usfw_winchester_species_list.pdf (PDF)(12 pp, 347 K)