The workers were classified by the usual racial and gender lines of the region, which limited opportunities for minorities and women. TVA hired a few African Americans, generally restricted for janitorial or other low-level positions. TVA recognized labor unions; its skilled and semi-skilled blue collar employees were unionized, a breakthrough in an area known for corporations hostile to miners' and textile workers' unions. Women were excluded from construction work. TVA's cheap electricity attracted textile mills to the area, and they hired mostly women as workers.