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REQUEST FOR COUNCIL ACTION Date: 2/25/13 Item No.: 7.g Department Approval City Manager Approval Item Description: Authorize Acceptance of Minnesota Pollution Control Agency Environmental Assistance Grant for Villa Park Wetland Restoration Project Page 1 of 2 B ACKGROUND 1 The Villa Park Wetland System (VPWS) is locat ed upstream of Lake McCarrons. The VPWS 2 consists of eight treatment cell components and receives storm water runoff from a 753-acre, fully 3 developed urban watershed, which is approximate ly 70 percent of the total 1,044-acre watershed 4 tributary to Lake McCarrons. Th is system was constructed to pr ovide storm water quality treatment 5 for the storm water runoff prior to its discharge into Lake McCarrons. 6 Data has been collected since the 1980s to monito r the water quality treatment effectiveness of the 7 VPWS. In 2009, the Capitol Region Watershed District (CRWD) completed the Villa Park Wetland 8 Management Plan (VPWMP). Water quality data analyses completed for the VPWMP indicate that 9 VPWS components have accumulated sediments and excess phosphorus and have become a net 10 source of phosphorus for Lake McCarrons. Th e VPWMP recommended that management for 11 removing or immobilizing the sources of phosphor us in the VPWS should be a priority for 12 protecting Lake McCarrons. 13 A water quality model of the VPWS was created to evaluate various management options and their 14 phosphorus removal efficiency. Several manage ment options were evaluated based on cost, 15 estimated phosphorus removal, expected design life, and maintenance costs. The recommended 16 management option is dredging the VPWS to re duce watershed phosphorus loads. To accomplish 17 this, CRWD has developed a sedi ment dredging project to accomplish the needed maintenance on 18 the VPWS. 19 In 2012, the Minnesota Pollution Control Agency (MPCA) awarded to the City and CRWD, a 20 $100,000 grant for the Villa Park Wetland Restoration Pr oject. The project calls for the removal of 21 approximately 20,000 cubic yards of Polycyclic Aromatic Hydrocarbon (PAH) contaminated 22 sediments via hydraulic dredging and geotextile tube dewatering. 23 P OLICY O BJECTIVE 24 City policy is to cooperate with ot her agencies for mutual benefit and seek grants to assist in funding 25 these projects whenever possible. 26 This project is consistent with the goals of th e City’s Comprehensive Surface Water Management 27 Plan. It will help protect the integrity of stor m water conveyance channels, reduce nutrient loading 28 and improve water quality flowing to Lake McCarrons. 29 The approval of this resolution is required by the MPCA as a part of the grant approval process. 30