The original interactive map is back: switch pollutant views, play the synthetic wind year, and explore nearby places. The plume and colored bands are illustrations—not measured concentrations, exposure boundaries, or OPA’s dispersion modeling.
September proposal: KJRH reported a proposed potline fluoride cap of 0.64 lb per metric ton of aluminum, 37% below the original proposal. This is not a whole-facility annual total or proof of permit approval. It does not set this illustration’s plume size or intensity. Read the September report · Check DEQ’s current review status.
A smelter can emit different substances with different atmospheric behavior. These three views explain those differences using illustrative scales. They do not establish how far this proposed facility’s emissions would travel. The September update concerns the proposed potline fluoride rate, not all pollutants.
The September proposal lowers the potline fluoride cap to 0.64 lb per metric ton of aluminum, according to KJRH. KJRH reports this is 37% below the original proposal. This is not a whole-facility annual total or evidence of approval. Deposition and exposure depend on emissions, weather and other site-specific factors; the illustrated bands are not a regulatory dispersion study.
Sulfur and nitrogen oxides oxidise over hours to days into sulfate and nitrate aerosols — acid deposition and fine particulate haze. Site-specific modeling is needed to evaluate possible effects on Class I wilderness areas. The bands on this map do not establish that emissions reach them.
Released during anode effects in the smelting process. Chemically inert in the lower atmosphere, with lifetimes measured at 10,000 to 50,000 years. There is no distance at which these stop. They will outlast every institution now arguing about the permit.
What is sourced. The September potline fluoride proposal is attributed to KJRH above. The base map comes from OpenStreetMap; the site, schools, and community markers are approximate reference locations. Other values in the original illustration are not verified September permit inputs.
What is simulated. The hourly wind is generated from a seeded algorithm—not a recorded NOAA year, live weather, or a validated local climatology. The plume, illustrative bands, and school-bearing counter use those synthetic directions. Band sizes and animation speed are fixed demonstration choices, not pollutant concentrations or validated transport distances.
What this is not. This is not a regulatory dispersion model or a defensible exposure envelope. Neither live wind nor a proposed emission rate alone establishes safe or unsafe areas. Site-specific emissions, stack parameters, terrain, meteorology, and validated modeling are needed to estimate concentrations. Consult DEQ for application materials and review status.
Six documented risks — air, water, cattle, traffic, the grid, and the region — each one traceable to the permit application or the published literature.
Read the risks →