Sioux City, IA Environmental Rules: Erosion Control (2026)
Key Facts
- Permit trigger
- >50 cubic yards moved
- Large-grade filing
- >1,000 cy needs engineer plans
- Contractor bond
- $10,000 surety bond
- Loess Hills grading
- requires City Council approval
- Violation class
- municipal infraction, fine + nuisance
Summary
Sioux City requires a grading permit before moving more than 50 cubic yards of material anywhere in the city, with the application folding in a stormwater management and drainage plan.
No person shall do any grading on any property which involves the movement of more than 50 cubic yards of material in the city without first obtaining a grading permit as provided herein. Grading permit approval will be concurrent with approval of the following activities: (a) building permit; (b) land development as part of a subdivision platting and (c) public infrastructure construction. Grading for extraction and landfilling authorized by a zoning conditional use permit will also require issuance of a grading permit. Under no circumstances shall a grading permit be issued, nor shall any grading commence, which will have the effect of bringing a subdivision to grade unless a preliminary plat has been approved for said property. Grading permits for grading activities in the Loess Hills within that area visible from the Loess Hills National Scenic Byway located on Highway 12 and Interstate 29 shall require City Council approval of the permit. The Loess Hills National Scenic Byway is that route set forth in the attached map which shall be kept on file in the offices of the City Clerk, the Engineering Division of the Public Works Department, and the City Zoning Office.
(Ord. 2020-0860; 2015-0216; 2006-0146; 2001-0740; 2000-9159; 88/T-6762)
https://online.encodeplus.com/regs/siouxcity-ia/doc-viewer.aspx#secid-963 641/1110 8/12/26, 3:47 PM Document Viewer | Municipal Code
Full Breakdown
Under Sioux City Municipal Code § 20.30.040, no one may grade property that moves more than 50 cubic yards of material without a permit from the city engineering division, obtained alongside any building permit, subdivision plat, or conditional use permit. Applications for grading over 1,000 cubic yards need engineer-prepared contour drawings, a stormwater management plan, and a soil erosion control plan (§ 20.30.060). Grading in the Loess Hills visible from the Scenic Byway needs City Council approval, and drainage must carry surface water to an approved storm drain, watercourse, or street (§ 20.30.070). Violations are a municipal infraction.
Violations & Fines
A municipal infraction under § 1.04.100, with unpermitted or noncompliant grading also abatable as a public nuisance under Chapter 8.72.
Frequently Asked Questions
Do I need a permit to regrade my Sioux City yard?
Does the grading permit cover drainage design?
Sources & Official References
Other rules in Sioux City
Compare Sioux City to another location·View the Iowa environmental rules overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.