5.8.1 Painter Creek Feasibility Study Projects

The Painter Creek Feasibility Study analyzed in-depth potential options for phosphorus load reductions to Painter Creek. Many of the projects identified in the Study focus on using the extensive wetlands through which the creek flows by spreading that flow across the wetland to maximize contact time with wetland soils, using natural processes to accomplish phosphorus reductions.

This is an unproven approach that appears promising and was recommended by a panel of experts assembled for the Feasibility Study. The District proposes to construct one of the proposed restorations as a demonstration project with extensive monitoring. If the results are satisfactory, then the District proposes to go forward with other projects. Should the approach not provide satisfactory and cost-effective pollutant removals, then alternatives will be studied for future consideration.

ProjectPC-6 & 7 Pond
DescriptionConstruction of detention and treatment downstream of Maple Plain prior to discharge into west wetland of Katrina Lake
NeedThe phosphorus reduction plan for Jennings Bay requires a reduction of 1,827 pounds of phosphorus per year from the subwatershed. A wet detention pond is proposed to treat the drainage from the city of Maple Plain discharging into Lake Katrina.
OutcomeThis pond could remove an estimated 111 pounds of phosphorus annually, along with other pollutants such as sediment.
Estimated Cost and FundingInvestigation, land acquisition, permitting, implementation, and project management. Funding source is the District capital levy.$358,500
Schedule

2013 Design, easement acquisition, cooperative agreement

2014 Construction

ProjectStudy Katrina Lake In-Lake Load Management Options
DescriptionStudy internal load management options for Katrina Lake, including rough fish management and chemical treatment
NeedThe phosphorus reduction plan for Jennings Bay requires a reduction of 1,827 pounds of phosphorus per year from the subwatershed. Katrina Lake is the headwaters of Painter Creek. Improvements to in-lake phosphorus and sediment concentrations would improve the quality of water discharged into Painter Creek and transported ultimately to Jennings Bay.
OutcomeInternal load management could remove an estimated 97 pounds of phosphorus annually, along with other pollutants such as sediment.
Estimated Cost and FundingCooperative study with the Three Rivers Park District. Funding source is the District operating levy.$5,000
Schedule

2008

ProjectSouth Katrina Marsh Improvements
DescriptionAlter weir to spread flow through wetland and floodplain, and expand existing pond to maximize pre-treatment of inflows
NeedThe phosphorus reduction plan for Jennings Bay requires a reduction of 1,827 pounds of phosphorus per year from the subwatershed. As identified in the Painter Creek Feasibility Study, this project would spread the flow of Painter Creek across the South Katrina Marsh to maximize contact time with wetland soils, using natural processes to accomplish phosphorus reductions. A small existing pond would be expanded to provide some pretreatment of the inflows to the wetland.
OutcomeThis project could remove an estimated 384 pounds of phosphorus annually, along with other pollutants such as sediment.
Estimated Cost and FundingInvestigation, permitting, implementation, and project management. Funding source is the District capital levy.$359,600
Schedule

2014 Design, easement acquisition, cooperative agreement

2015 Construction

ProjectAdditional PC-13 Storage, Stabilize Stream
DescriptionReduce erosive peak flows from Maple Plain and Independence by creating upstream storage, and stabilize eroding stream
NeedThe phosphorus reduction plan for Jennings Bay requires a reduction of 1,827 pounds of phosphorus per year from the subwatershed. As detailed in the Painter Creek Feasibility Study, inadequate upstream storage is resulting in erosion in channel and streams that are tributary to Painter Creek. This streambank erosion increases phosphorus and sediment loading in the Creek and is transported downstream to Jennings Bay. Additional upstream storage would reduce peak flows and thus reduce erosion potential.
OutcomeReduction in sediment and nutrient transport.
Estimated Cost and FundingInvestigation, land acquisition, permitting, implementation, and project management. Funding source is the District capital levy.$137,800
Schedule

2011 Design, easement acquisition

2012 Construction

Project“Potato Farm” Wetland Improvements
DescriptionDevelop “Potato Farm” site into a wetland treatment system
NeedThe phosphorus reduction plan for Jennings Bay requires a reduction of 1,827 pounds of phosphorus per year from the subwatershed. As detailed in the Painter Creek Feasibility Study, a wet detention pond is proposed for the site known as the “Potato Farm.” This pond/wetland system would provide additional pretreatment for drainage from Maple Plain, as well as directly treat flow in Painter Creek.
OutcomeThis pond could remove an estimated 271 pounds of phosphorus annually, along with other pollutants such as sediment.
Estimated Cost and FundingInvestigation, land acquisition, permitting, implementation, and project management. Funding source is the District capital levy.$513,400
Schedule

2009 Design, easement acquisition

2010 Construction

ProjectTreatment at Painter Marsh Inflow, Marsh Restoration
DescriptionConstruct detention pond to treat discharge from PC—13 prior to inflow to Painter Marsh. Restore wetland and floodplain, acquire conservation easements, repair channel crossing and watering pond.
NeedThe phosphorus reduction plan for Jennings Bay requires a reduction of 1,827 pounds of phosphorus per year from the subwatershed. As detailed in the Painter Creek Feasibility Study, a wet detention pond is proposed for consideration on Painter Creek prior to its discharge into Painter Marsh. This project would spread the flow of Painter Creek across the Painter Marsh to maximize contact time with wetland soils, using natural processes to accomplish phosphorus reductions.
OutcomeThis pond could remove an estimated 54 pounds of phosphorus annually, along with other pollutants such as sediment. Marsh resotration could remove an estimated 524 pounds of phosphorus annually, along with other pollutants such as sediment.
Estimated Cost and FundingInvestigation, land acquisition, permitting, implementation, and project management. Funding source is the District capital levy.$1,077,000
Schedule

2008 Design, easement acquisition, cooperative agreement

2009 Construction

ProjectWetland Corridor Improvements
DescriptionRestore natural corridor through wetlands 84W and 212W prior to discharge to Painter Marsh
NeedThe phosphorus reduction plan for Jennings Bay requires a reduction of 1,827 pounds of phosphorus per year from the subwatershed. As detailed in the Painter Creek Feasibility Study, restoration of these channelized wetlands would provide pre-treatment prior to discharge into Painter Marsh.
OutcomePre-treatment of flows into Painter Marsh.
Estimated Cost and FundingInvestigation, land acquisition, permitting, implementation, and project management. Funding source is the District capital levy.$397,500
Schedule

2009 Design, easement acquisition, cooperative agreement

2010 Construction

ProjectHwy 26 (Pond 937) Wetland Restoration
DescriptionAlter weir to spread flow through wetland and floodplain
NeedThe phosphorus reduction plan for Jennings Bay requires a reduction of 1,827 pounds of phosphorus per year from the subwatershed. As identified in the Painter Creek Feasibility Study, this project would spread the flow of Painter Creek across the wetland south of Highway 26 to maximize contact time with wetland soils, using natural processes to accomplish phosphorus reductions.
OutcomeThis pond could remove an estimated 293 pounds of phosphorus annually, along with other pollutants such as sediment.
Estimated Cost and FundingInvestigation, land acquisition, permitting, implementation, and project management.$137,300
Schedule

2006 Design, easement acquisition

2007 Construction

ProjectPC-25 Wetland Treatment
DescriptionConstruct wetland detention system to treat runoff from PC-25
NeedThe phosphorus reduction plan for Jennings Bay requires a reduction of 1,827 pounds of phosphorus per year from the subwatershed. As detailed in the Painter Creek Feasibility Study, subwatershed PC-25 is expected to develop between 2000 and 2020 and contribute additional phosphorus load to Painter Creek. This project would spread the flow of the tributary draining PC-25 through a wetland detention system to maximize contact time with wetland soils, using natural processes to accomplish phosphorus reductions.
OutcomeThis pond could remove an estimated 25 pounds of phosphorus annually, along with other pollutants such as sediment.
Estimated Cost and FundingInvestigation, land acquisition, permitting, implementation, and project management. Source of funds is the District capital levy.$214,500
Schedule

2014 Design, easement acquisition, cooperative agreement
2015 Construction

ProjectCarp Gate At Creek Mouth
DescriptionInstall flexible carp gate and mouth of Creek
NeedCarp and other rough fish are bottom feeders, and their activity resuspends phosphorus in lake and stream sediments. A gate at the mouth of the Creek would assure that no new rough fish are able to migrate from Lake Minnetonka upstream into the wetland complexes that are riparian to Painter Creek.
OutcomeReduction in phosphorus, sediment, and total suspended solids loading from riparian wetlands into Painter Creek and conveyed to Jennings Bay.
Estimated Cost and FundingDesign, construction, project management. Funding source is the District capital levy,$59,800
Schedule

2014