Lower St. Croix River Watershed: TMDL projects

The reports and related documents listed here are total maximum daily load projects undertaken in the Lower St. Croix River Watershed. See the watershed-approach TMDL report on the Lower St. Croix River Watershed page.

Basin-wide projects

Lake St. Croix TMDL: Excess nutrients

Global: Public comment on TMDL Modifications for Stormwater Wasteload Allocations

Proposed TMDL modifications to 13 TMDLs for stormwater wasteload allocations to reflect changes in these watersheds since they were approved by U.S. EPA. Visit the posting in SmartComment to review the draft documents and provide feedback. The comment period runs Jan. 5-Feb. 4, 2026.

Review and comment

• Lake St. Croix excess nutrients TMDL: Fact sheet (wq-iw6-04a)
• Lake St. Croix excess nutrients TMDL report (wq-iw6-04e)

  (EPA approval 8/8/2012)
• Lake St. Croix excess nutrients TMDL: EPA approval letter (wq-iw6-04g)
• 2019 Modification to Lake St. Croix nutrient TMDL (wq-iw6-04z)
• Lake St. Croix excess nutrients TMDL implementation plan (wq-iw6-04c)

  (MPCA approval 10/26/2012)
• Lake St. Croix TMDL: 2015 implementation progress report (wq-iw6-04x)
• Lake St. Croix TMDL: 2016 implementation progress report (wq-iw6-04y)

Chisago County

Chisago Lakes Chain of Lakes Watershed

Global: Public comment on TMDL Modifications for Stormwater Wasteload Allocations

Proposed TMDL modifications to 13 TMDLs for stormwater wasteload allocations to reflect changes in these watersheds since they were approved by U.S. EPA. Visit the posting in SmartComment to review the draft documents and provide feedback. The comment period runs Jan. 5-Feb. 4, 2026.

Review and comment

• Chisago Lakes Chain of Lakes Watershed TMDL report (wq-iw6-10e)

  (EPA approval 2/20/2013)
• Chisago Lakes Chain of Lakes Watershed TMDL: EPA approval letter (wq-iw6-10g)
• Chisago Lakes Chain of Lakes Watershed TMDL: Restoration and protection plan (wq-iw6-10c)

  (MPCA approval 2/25/2013)

Comfort Lake - Forest Lake Watershed District TMDL: Excess nutrients

• Comfort Lake - Forest Lake Watershed District TMDL: Fact sheet (wq-iw6-03a)
• Comfort Lake - Forest Lake Watershed District TMDL report (wq-iw6-03e)

  (EPA approval 6/7/2010)
• Comfort Lake - Forest Lake Watershed District TMDL: EPA approval letter (wq-iw6-03g)
• Comfort Lake - Forest Lake Watershed District TMDL implementation plan (wq-iw6-03c)

  (MPCA approval 6/11/2010)

Washington County

Valley Branch Watershed District TMDL and WRAPS

• Valley Branch Watershed District TMDL report (wq-iw6-12e)

  (EPA approval 7/7/2016)
• Valley Branch Watershed District Kelle's Creek and Sunfish Lake TMDL report: EPA approval letter (wq-iw6-12g)
• Valley Branch Watershed District WRAPS report (wq-ws4-16a)

  (MPCA approval 3/8/2016)
• Summary of the Valley Branch Watershed District WRAPS report (wq-iw6-12k)

Carnelian-Marine-St. Croix Watershed District 10 lakes TMDL: Excess nutrients

• Carnelian-Marine-St. Croix Watershed District 10 lakes TMDL report (wq-iw6-09e)

  (EPA approval 9/18/2012)
• Carnelian-Marine-St. Croix Watershed District 10 lakes TMDL: EPA approval letter (wq-iw6-09g)
• Carnelian-Marine-St. Croix Watershed District 10 lakes TMDL implementation plan (wq-iw6-09c)

  (MPCA approval 8/30/2013)

Browns Creek TMDL: Lack of cold water assemblage and impaired biota

• Brown’s Creek impaired biota TMDL: Fact sheet (wq-iw6-05a)
• Brown's Creek impaired biota TMDL report (wq-iw6-05e)

  (EPA approval 12/21/2010)
• Brown's Creek impaired biota TMDL: EPA approval letter (wq-iw6-05g)
• Brown's Creek impaired biota TMDL implementation plan (wq-iw6-05c)

  (MPCA approval 2/16/2012)

Anoka County

Typo and Martin lakes TMDL: Excess nutrients

Global: Public comment on TMDL Modifications for Stormwater Wasteload Allocations

Proposed TMDL modifications to 13 TMDLs for stormwater wasteload allocations to reflect changes in these watersheds since they were approved by U.S. EPA. Visit the posting in SmartComment to review the draft documents and provide feedback. The comment period runs Jan. 5-Feb. 4, 2026.

Review and comment

• Typo Lake and Martin Lake TMDL report (wq-iw6-08e)

  (EPA approval 6/20/2012)
• Typo Lake and Martin Lake TMDL: EPA approval letter (wq-iw6-08g)
• Martin and Typo Lakes TMDL implementation plan (wq-iw6-08c)

  (MPCA approval 8/8/2012)

Multiple counties

Sunrise River TMDL: Fecal coliform

• Sunrise River fecal coliform TMDL: Fact sheet (wq-iw6-01a)
• Sunrise River fecal coliform TMDL report (wq-iw6-01e)

  (EPA approval 2/22/2007)
• Sunrise River fecal coliform TMDL: EPA approval letter (wq-iw6-01g)
• Sunrise River fecal coliform TMDL implementation plan (wq-iw6-01c)

  (MPCA approval 2/22/2007)

Sunrise River Watershed TMDL: Multiple impairments

Global: Public comment on TMDL Modifications for Stormwater Wasteload Allocations

Proposed TMDL modifications to 13 TMDLs for stormwater wasteload allocations to reflect changes in these watersheds since they were approved by U.S. EPA. Visit the posting in SmartComment to review the draft documents and provide feedback. The comment period runs Jan. 5-Feb. 4, 2026.

Review and comment

• Sunrise River Watershed TMDL report (wq-iw6-06e)

  (EPA approval 4/28/2014)
• Sunrise River Watershed TMDL: EPA approval letter (wq-iw6-06g)
• Sunrise River WRAPS report (wq-ws4-05a)

  (MPCA approval 12/16/2014)
• Sunrise River Watershed feasibility study (U.S. Army Corps of Engineers)

Addressing phosphorus in Sunrise River Watershed (Science Museum's St. Croix Watershed Research Station)

Work from 2012 is found in the Minnesota Water Research Digital Library (MnWRL).

• Reductions from changing selected characteristics of developed land
• Phosphorus and projected population increases
• Reductions from agricultural best practices
• Reductions from wetland mitigation
• Constructing a SWAT model of the Sunrise River Watershed

Goose Creek Watershed TMDL

• Goose Creek Watershed TMDL report (wq-iw6-13e)

  (EPA approval 2/5/2016)
• Goose Creek Watershed TMDL: EPA approval letter (wq-iw6-13g)
• Goose Creek WRAPS report (wq-ws4-15a)

  (MPCA approval 1/7/2016)