Environmental Rules in Plymouth, MN (2026)
5 verified environmental rules for Plymouth, Minnesota, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
In the City of Plymouth, Minnesota, City Code Sections 725.14 through 725.17 ban dumping anything but storm water into the City's storm drain system, the MS4, and separately prohibit illicit connections such as sewage lines tied into storm sewers. Violations fall under Chapter XX enforcement, and the City may enter private property without prior notice to abate a discharge that endangers public health or safety.
Plymouth Storm Drainage & Discharge Rules
Some RestrictionsPlymouth City Code §§ 725.14-725.17
725.14. - Prohibition of Illegal Discharges. No person shall throw, drain, or otherwise discharge, cause, or allow others under its control to throw, drain, or otherwise discharge into the MS4 any pollutants or waters containing any pollutants, other than storm water. The commencement, conduct or continuance of any illegal discharge to the storm drain system is prohibited except as described as...
Erosion Control
In the City of Plymouth, any subdivider disturbing earth must get an erosion control plan approved by the City Engineer before grading starts. City Code Section 526 caps bare soil exposure at 14 days, requires erosion control blankets on steep slopes, and backs the plan with a $1,500.00-per-acre financial guarantee the City can draw on for noncompliance.
Plymouth Construction Site Erosion Control Rules
Some RestrictionsPlymouth City Code §§ 526.01, 526.03
Prior to commencing any earth disturbing activity in a subdivision, the subdivider shall submit an erosion control plan for approval by the City Engineer. The plan shall be approved if it complies with the City's Zoning Ordinance and the requirements contained herein. ... No area shall be left denuded for a period longer than 14 days after initial site grading and other land disturbing operatio...
Flood Zones
The City of Plymouth regulates construction, fill placement, and land-use changes inside the mapped Floodway, Flood Fringe, and General Floodplain Districts under Zoning Ordinance Section 21660. Adopted to keep the city eligible for the National Flood Insurance Program, the ordinance bars critical facilities, manufactured home parks, and recreational vehicle parks or campgrounds from every floodplain district and requires an administrative permit from the Zoning Administrator before any building work, fill, excavation, or flood-blocking fence in a mapped flood hazard area.
Plymouth Floodplain Overlay District Rules
Significant RestrictionsPlymouth City Code §§ 21660.02, 21660.04, 21660.10
This ordinance regulates development in the flood hazard areas of the City of Plymouth. These flood hazard areas are subject to periodic inundation, which may result in loss of life and property, health and safety hazards, disruption of commerce and governmental services, extraordinary public expenditures for flood protection and relief, and impairment of the tax base. ... All uses not listed a...
Boat Dock Permits
In the City of Plymouth, no one may build, install, or maintain a dock, wharf, or similar structure on park property or in public waters abutting a park without a permit from the Parks and Recreation Director. Only owners who already had a dock in place by July 1, 1987 qualify, and the City Council intends to phase out every remaining dock as those abutting properties are sold.
Dock Permits Required on Plymouth Park Property
Some RestrictionsPlymouth City Code § 805.15
The purpose of this Section is to allow owners of property abutting public parks who have installed or maintained docks, wharves, or similar structures on park property on or before July 1, 1987 to continue to use and maintain those structures, subject to the conditions and restrictions set forth in this Section. It is the intention of the Council to phase out and eliminate the existence of suc...
Flood Elevation Requirements
In the City of Plymouth, the Zoning Ordinance's Floodplain Overlay District requires new and substantially improved structures in the Flood Fringe District to sit on fill so the lowest floor is at or above the 'regulatory flood protection elevation,' defined in Section 21005.02 as at least two feet above the regional flood elevation. Fill must extend that height at least 15 feet beyond the structure's outside limits.
Plymouth Flood Protection Elevation Rule
Significant RestrictionsPlymouth City Code § 21660.06, Subd. 1(b)(1); § 21005.02(s)
(s)Regulatory Flood Protection Elevation: The elevation to which uses regulated by this Chapter are required to be elevated or floodproofed. The regulatory flood protection elevation shall be an elevation not less than two feet above the elevation of the regional flood. ... All structures, including accessory structures, shall be elevated on fill so that the lowest floor, as defined, is at or a...
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