Rogers Group, Inc. v. City of Fayetteville, 629 F.3d 784 (8th Cir. 2010)

(defendant passed ordinance limiting operation of rock quarries within city limits and within one mile thereof; trial court enjoined enforcement of ordinance because, under AR law, ordinance only valid if quarry judicially found to be nuisance; defendant cannot regulate quarries in an attempt to abate a nuisance; trial court correctly determined that quarry at issue had shown that enjoining its activities via ordinance would constitute irreparable harm).