SALT LAKE COUNTY, Utah — Hundreds of frustrated members of the Millcreek community filled their city hall Wednesday night, with city leaders standing right beside residents as they spoke out against a proposed gravel mine up Parley’s Canyon. “We’re gonna add another gravel pit so we can get a little bit more dust?”For decades, they have felt the issues of air quality acutely. I endure bi-monthly injections to keep my lungs open.”She fears those issues will only be exacerbated by the Parley’s Canyon mine that Granite Construction has proposed. “The division of air quality has determined the proposed project and permit would meet all applicable state and federal requirements,” Humphreys continued. So she says the community needs to remain vigilant in representing its viewpoint for the thousands it could affect.