03-11-2024 CC (2) - Laserfiche WebLink

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Mounds View City Council March 11, 2024 Regular Meeting Page 3 Public Works/Parks and Recreation Director Peterson provided the Council with information on the Silver View storm water pond. He explained this this was the second meeting regarding this topic, noting the first was held at the park last September. He reviewed aerial photography of the pond, noting this pond was originally an agricultural ditch. He discussed how the City has been working with Stantec to study and analyze this pond. He reported staff recently met with the watershed district to discuss potential grant opportunities. Dan Edgerton, Engineer with Stantec, commented on the modeling that was completed for the proposed pond improvements. He reported two linear bioretention ponds were being recommended for the runoff from the parking lot. He explained the existing infiltration basins would be rehabilitated and spot dredging would be completed. Sarah Harding, Landscape Architect with Stantec, discussed the vegetation management plans for the Silver View storm water pond and described how the plans would help keep soil in place. She stated the vegetation improvements would also assist in protecting the old growth oak trees. Public Works/Parks and Recreation Director Peterson explained costs estimates are being finalized with Stantec. He provided further comment on the infiltration improvements that would be made to the pond and asked for comments or questions from the Council. Council Member Meehlhause asked what parts would not be mowed in the future. Public Works/Parks and Recreation Director Peterson described the area that would not be mowed in the future, noting this would be the area from the trail to the pond, not on the house side of the trail. Council Member Meehlhause questioned if the box elder trees were considered invasive and would these trees be removed. Ms. Harding reported the box elder trees were considered native flood plain trees and there would be selective removal of these trees. She discussed how the pond bank would have to be stabilized if any trees were removed. Mayor Lindstrom requested further information on how alum would be used in the pond. Mr. Edgerton described how alum assisted with address the phosphorous levels within the pond. Council Member Gunn asked if the native plantings would be pollinator friendly. Public Works/Parks and Recreation Director Peterson reported this was the plan. Council Member Gunn inquired how long this project would take to complete. Public Works/Parks and Recreation Director Peterson reported the proposed improvements were long-term in nature and estimated the plans would take two or three years to complete. Karen Arciero, 7417 Parkview Drive, explained she lived right on the pond. She stated once the vegetation was removed, she wondered how the wildlife would be impacted. Public Works/Parks and Recreation Director Peterson reported the work would be done in late fall or during the winter. She indicated no work would be done during the nesting season so as not to impact the water fowl or turtles.