Rules & Permits

Carnelian Marine St. Croix Watershed District's Regulatory Program Goals

To ensure reasonable and consistent standards that will protect the region's water resources for generations to come, the Carnelian-Marine-St. Croix Watershed District (CMSCWD) is charged by state law to issue and monitor permits. The CMSCWD regulatory program goals are to protect and improve the quality of water resources within the District, prevent future property losses due to flooding, and efficiently coordinate District permitting with local, county, state, and federal permitting and enforcement efforts. Ultimately, the goal is to balance property owners' use of their property with ensuring the protection and management of water and surrounding resources so that residents and visitors can enjoy local lakes, rivers, and streams.

Why are Permits Required? 

The Carnelian-Marine-St. Croix Watershed District Requires Permits for Properties within its Boundaries in order to:

  • Protect the water resources of the CMSCWD for all current and future users
  • Reduce the severity and frequency of flooding  
  • Preserve floodplain and wetland storage capacity
  • Improve the chemical and physical quality of surface water
  • Reduce sediment build-up to preserve the flow of lakes and streams
  • Minimize public expenditures to correct damage in the future
  • Preserve natural shoreline and habitat for aquatic life

Permit Applications

A pre-application meeting with District staff is encouraged prior to development and submittal of plans. Please see the complete CMSCWD Permit Process Guidance for more information. Complete permit applications are due 28 days prior to the monthly board meeting. Please see the complete Permit Submittal Deadline Guide for more information.

Single Lot Residential Permit Application
Development Permit Application

When Do I Need a CMSCWD Permit?

    Land Disturbance/Grading

    • Any land disturbance of ¼ acre or more, if any part of the disturbed area is within 1,000 feet of and tributary to a groundwater-dependent natural resource or public water.
    • A land disturbance of 5,000 square feet or more that includes creating impervious surface within 1,000 feet of a tributary to a groundwater-dependent natural resource or public water.
    • Any land disturbance of one acre or more.
    • Any disturbance of the natural shoreline or streambank partially or wholly below the ordinary high-water mark of a waterbody.
    • Any alteration of stormwater flows at a property boundary by changing land contours, diverting or obstructing surface or channel flow, or creating a basin outlet.

    New Construction or Reconstruction

    • Any project (including linear projects such as road, bikeway, sidewalk, etc.) creating impervious surface that exceeds either one acre or five percent of a site, whichever is less.
    • Any land disturbance of 5,000 square feet or more that includes creating impervious surface within 1,000 feet of a tributary to a groundwater-dependent natural resource or public water.

    Variances from City or County

    • Any parcel of land that is subject to a variance from the applicable shoreland or St. Croix Riverway ordinance relating to structure setback from the property line adjacent to the resource or impervious surface percentage.

    Other Activities

    • Any use of the bed of any waterway – including the placement of culverts, driveways, trails, and utilities
    • Alteration or filling of land below the 100-year flood elevation of any waterbody, wetland, or stormwater management basin, or placement of fill below the 100-year flood elevation of a landlocked basin.
    • Any activity that alters the character or hydrology of a wetland including filling, excavating, pumping water or the grazing of livestock in a wetland.

    Subdivision

    • Residential subdivision of four or more lots.
    • Subdivision adjacent to or containing a stream designated as a public water, a groundwater-dependent natural resource, a wetland, or the St. Croix River. 
    • Subdivision of land below the 100-year flood elevation of any waterbody, wetland, or stormwater management basin.

    Maps

    Groundwater-Dependent Natural Resource Map 
    Wetland Classifications for Buffer Requirements Map 

    Wetlands identified and classed by the CMSCWD. This is not a complete map of all wetlands in the District. Landowners proposing construction projects are required to verify the location and extent of wetland on their property prior to applying for a permit.

    Shoreline Permits 

    A permit is required for any disturbance on the natural shoreline or streambank partially or wholly below the ordinary high-water mark of a waterbody.  To preserve the ecological integrety and protect the water quality of Distrct lakes bioengineering is required for all shoreline stabilization projects unless deemed infeasible. 

    Bioengineering uses live plants and woody vegetation to produce living, functioning dynamic systems that prevent erosion, control sediment, and provide critical habitat. .

    Bioengineering Cross Sections

    Lakeshore Bank Restoration Plan and Cross Section
    Lakeshore Scour Restoration Plan and Cross Section
    Lakeshore Ice Heave Plan and Cross Section
    Loafing Log Plan and Cross Section
    List of Recommended plantings for Shoreline Restoration