Chemsol, LLC v. City of Sibley, 386 F. Supp. 3d 1000

Background

ChemSol owned a drying facility in Sibley, Iowa, and transferred the facility to IDP in April 2017; both companies share executive personnel and business ties. IDP operates spray-dryers that produced strong, widely reported odors beginning in 2012.
Sibley adopted and amended a nuisance/odor municipal ordinance (2013, 2015, 2016), ultimately defining nuisances as "unreasonably offensive" odors and increasing civil fines. The 2016 amendment aligned the ordinance with Iowa nuisance law and provided abatement procedures including notice and hearings.
From 2016–2018 IDP received multiple municipal odor citations and an abatement order after a March 2016 hearing; the City required escrow funds for an independent engineer and retained jurisdiction. IDP did not install the proposed wet scrubbers.
Plaintiffs sued under 42 U.S.C. § 1983 and Iowa law asserting: (1) facial and as-applied due process/vagueness challenges to the ordinance; (2) inverse condemnation (taking); and (3) tortious interference with expected business advantage. Defendant moved for summary judgment.
The court found mixed factual record on pre-operational notice to the city, no evidence of a clear promise by Sibley to permit operations, and that plaintiffs failed to contest or appeal many citations in state proceedings.

Issues

Issue	Plaintiff's Argument	Defendant's Argument	Held
Facial vagueness of odor ordinance	Ordinance is vague ("offensive"/"unreasonably offensive") and lacks objective standards (frequency, duration, intensity)	Ordinance tracks traditional public-nuisance law and Iowa statute; qualified language gives adequate notice	Ordinance not facially vague; summary judgment for Sibley
As-applied vagueness / arbitrary enforcement	City selectively enforced ordinance against IDP, increased fines to pressure them, sometimes cited when plant not operating; estoppel from prior representations	Enforcement targeted true nuisance within city limits; other odor sources were outside jurisdiction; no clear promise by city to allow operations; investigatory discretion justified	No as-applied violation; Rooker–Feldman bars challenges to prior state judgments; summary judgment for Sibley
Federal inverse condemnation (regulatory taking)	Enforcement and abatement effectively deprived IDP of use/values of property requiring compensation	Abatement is an exercise of police power against public nuisances and not a compensable taking under federal law	Federal takings claim fails; summary judgment for Sibley
Iowa inverse condemnation / tortious interference	State takings and tortious interference: city actions destroyed sale opportunities and caused lost profits	Under Iowa law property owner has no right to maintain a public nuisance; municipal enactment/enforcement are discretionary and immune; no evidence of improper purpose or specific third-party communications	State takings and tortious interference claims dismissed; summary judgment for Sibley

Key Cases Cited

Celotex Corp. v. Catrett, 477 U.S. 317 (summary judgment burden and standard)
Anderson v. Liberty Lobby, Inc., 477 U.S. 242 (materiality and reasonable jury standard)
Matsushita Electric Industrial Co. v. Zenith Radio Corp., 475 U.S. 574 (summary judgment and metaphysical doubt)
Lujan v. Defenders of Wildlife, 504 U.S. 555 (standing requirements)
Washington v. Glucksberg, 521 U.S. 702 (facial challenge standard)
United States v. Salerno, 481 U.S. 739 (facial invalidity standard)
Village of Willowbrook v. Olech, 528 U.S. 562 (class-of-one equal protection framework)
Engquist v. Oregon Department of Agriculture, 553 U.S. 591 (limitations on class-of-one claims for discretionary decisions)
Kelo v. City of New London, 545 U.S. 469 (public-powers/police-power limits on takings claims)
Pennsylvania Coal Co. v. Mahon, 260 U.S. 393 (regulatory takings framework)
Lucas v. South Carolina Coastal Council, 505 U.S. 1003 (total deprivation rule in takings law)
Mugler v. Kansas, 123 U.S. 623 (police power and regulation of property use)