The Middle St. Croix Watershed Management Organization works with residents, organizations, and its member communities of Afton, Bayport, Baytown Township, Lakeland Shores, Lakeland, Lake St. Croix Beach, Oak Park Heights, St. Mary’s Point, Stillwater, and West Lakeland Township to collectively protect and manage the quality of water resources in an efficient and effective manner.

Watershed organizations must update their Watershed Management Plan once every ten years. The 2025-2035 MSCWMO Watershed Management Plan was adopted on January 8, 2026. 

If you have questions or would like more information, please contact Matt Oldenburg-Downing, MSCWMO Administrator at MOldenburg-Downing@mnwcd.org or 651-796-2227.

Current Plan

2025-2035 MSCWMO Watershed Management Plan

Figures

Figure 1.1 Communities and Surface Waters
Figure 2.1 Bedrock Stratigraphy
Figure 2.2 Bedrock Geology
Figure 2.3 Bedrock Depth
Figure 2.4 Surficial Geology
Figure 2.5 Hydrologic Soil Group
Figure 2.6 Unified Soil Class
FIgure 2.7 Topography
Figure 2.8 Drainage Catchments
Figure 2.9 Wetland Management Class
Figure 2.10 NWI Simplified Plant Community Class
Figure 2.11 Flood Hazard Areas
Figure 2.12 Historic Average Summer Total Phosphorus Levels
Figure 2.13 Land Use
Figure 2.14 Land Cover
Figure 2.15 Water Based Recreation and Protection Areas
Figure 2.16 Natural Habitats
Figure 2.17 Regulated Pollutant Sources
Figure 2.18 Goundwater Protection
Figure 3.1 Stakeholder Priorities

Appendices

Appendix A Figures
Appendix B Lily Lake Stormwater Retrofit Assessment
Appendix C McKusick Lake Stormwater Retrofit Assessment
Appendix D Perro Creek Stormwater Retrofit Assessment
Appendix E Lake St. Croix Direct Discharge North Stormwater Retrofit Assessment
Appendix F Lake St. Croix Direct Discharge South Stormwater Retrofit Assessment
Appendix G Wetland Inventory
Appendix H Best Management Practice Inventory & Assessment
Appendix I 2024 Water Quality Monitoring Summary
Appendix J Aquatic Plant Management Plans for Lily and McKusick
Appendix K Macrophyte Survey Results
Appendix L Plan Update Collaboration Activities
Appendix M Public Engagement Survey Results
Appendix N Riverway Survey Results
Appendix O Joint Powers Agreement
Appendix P Water Governance
Appendix Q Maintenance Agreement Format Example
Appendix R Design Sequence Flow Chart

Previous Plans

2015-2025 MSCWMO Watershed Management Plan
2006-2015 MSCWMO Watershed Management Plan