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'It -ri` )I�EN HILLS Approved: September 26, 2022 CITY OF ARDEN HILLS, MINNESOTA CITY COUNCIL WORK SESSION AUGUST 15, 2022 5:00 P.M. - ARDEN HILLS CITY HALL CALL TO ORDER/ROLL CALL Pursuant to due call and notice thereof, Mayor Grant called to order the City Council Work Session at 5:00 p.m. Present: Mayor David Grant, Councilmembers Brenda Holden, Fran Holmes, Steve Scott and David Radziej Absent: None Also present: City Administrator Dave Perrault, Finance Director Gayle Bauman, Public Works Director/City Engineer David Swearingen, Deputy City Clerk Jolene Trauba, Communications Coordinator Grace Arel, HR Green Project Manager Bridget Osborn and HR Green Project Engineer John Morast 1. AGENDA ITEMS A. Water Quality BMP Analysis HR Green Project Manager Bridget Osborn explained that and MS4 permit stands for Municipal Separate Storm Sewer System permit. If you have lakes in your city there are certain requirements that have to be met to clean them up, usually including phosphorus or sediment. The MPCA normally does an assessment of the lakes, but in this case the Rice Creek Watershed District sent the total maximum daily load recommendation (TMDL) to the MPCA. A plan needs to be made to bring the lakes down to acceptable levels. They are proposing a scope of study for two lakes, Little Lake Johanna and Pike Lake, which is in New Brighton. Watershed from Arden Hills drains into both of these lakes. Public Works Director/City Engineer Swearingen added that one of the first things to be done would be to have a discussion with New Brighton to lay out the size of each city's watershed. Ms. Osborn explained they will determine best management practices to filter or capture the sediment before it gets to the pond, or removing phosphorus before they get to the lakes. The plan would also help with future grant opportunities.