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HomeMy WebLinkAbout09/28/2016 Environmental Board Minutes1. 2. 3. 4 CITY OF LINO LAKES ENVIRONMENTAL BOARD MINUTES DATE TIME STARTED TIME ENDED MEMBERS PRESENT MEMBERS ABSENT STAFF PRESENT : September 28, 2016 . 6:30 P.M. . 7:53 P.M. : Steve Heiskary, Paula Andrzejewski, Liz Kaufenberg, Nancie Klebba, John Sullivan : Barbra Bor, Alex Schwartz : Marty Asleson, Nan An Birds in our Backyard Presentation was at 6:30 pm CALL TO ORDER: Mr. Heiskary called the Lino Lakes Environmental Board meeting to order at 6:30 p.m. on September 28, 2016. APPROVAL OF AGENDA: Mr. Sullivan made a MOTION to approve the Agenda. Motion was seconded by Ms. Klebba. Motion carried 5 - 0. APPROVAL OF MINUTES August 31, 2016 Ms. Andrzejewski made a MOTION to approve the August 31, 2016 Meeting Minutes. Motion was seconded by Ms. Klebba. OPEN MIKE Declared Open Mike at 6:32 p.m. Closed Open Mike at 6:33 p.m. APPROVED MINUTES Evironmental Board September 28, 2016 Page 2 5. ACTION ITEMS A. Lino Lakes Elementary Renovation Lino Lakes Elementary School was originally built in 1957. This renovation project will result in an additional 4 classrooms totaling 7800sf to the building. There will also be a large gathering space at the front/south side of the building and an outdoor classroom to the west side of the building. Mr. Asleson introduced Nick Mantel with Louck's Engineering who is in charge of the renovation. Grading Plan and Stormwater Management On the 19.99 acre site, a drainage area of about 6.01 acres was included in the site hydrological analysis. 1.34 acres of disturbed area is pervious area that will be replace to match existing conditions. The proposed site BMP's will consist of an infiltration basin for treatment, volume control and rate control prior to discharging to the wetland to the north. The reconstructed parking lot and the building addition will convey stormwater to the infiltration basin using a storm sewer pipe system. The proposed site contains 46.3% impervious surface area. Which includes the reconstructed portion of the parking lot and roof drains that are being captured by the storm sewer system. Ms. Kaufenberg inquired about the drainage of the impervious surface area and the presence of infiltration ponds. Mr. Mantel explained how the infiltration ponds will capture the required 1.1 inches of rainfall over the new/reconstructed impervious surfaces on the site and the downspouts from the building with a maximum drawn down time of 48 hours. The proposed site contains two drainage areas. One area is the area where the new infiltration pond will be placed. There will be a storm manhole directly upstream of the infiltration basin and will include a 3 foot sump and energy dissipater with skimmer for pretreatment. The other drainage area will flow offsite to the north. A stormwater maintenance agreement will be required. Soils The soil also meet the infiltration standards for infiltration ponds. That is, it is an assumed infiltration rate of 0.45 inches per hour based on the soil borings. APPROVED MINUTES Evironmental Board September 28, 2016 Page 3 Wetlands The project does not appear to be impacting any wetlands. Floodplain There is Zone A floodplain along the east side of the site but there are no impacts. Trees Preservation Recommend moving the Arbor Day trees. In order to save the Arbor Day trees from destruction, it is proposed to move these trees out of grading area Ms. Klebba asked if moving the Arbor Day trees is feasible. Mr. Mantel said yes it has been mentioned by Marty and also the school district. They will be talking to the contractor about moving the trees to a safe location until the construction is done. Landscaping Proposed landscape plants (trees and shrubs) are all appropriate plant materials. Native seed mixes for the pond and upland areas must be approved by the city. Recommend a short native mix for the upland area. Ms. Andrzejewski motioned to forward the Lino Lakes Elementary School site plan to the Planning and Zoning Board and City Council with our recommendations and comments. It was seconded by Ms. Kaufenberg. Motioned carried 5-0. 6. DISCUSSION ITEMS A. Birds in our Backyard Mr. Heiskary thought that it was a good presentation and nice to see extra people in the audience. Ms. Kaufenberg said it was very informative. B. Peltier Lake Drawdown, Update There has been two slabs of the dam removed, but now with the addition rain the lake has now risen to the top of the dam. Mr. Heiskary said that the shoreline is where the majority of the curly weed is saturated. So just to get the shore line exposed is great. APPROVED MINUTES Evironmental Board September 28, 2016 Page 4 Ms. Kaufenberg wanted to know if drawing down the lake is a yearly event Mr. Heiskary mentioned that this project will be watched and Anoka County will see how this project goes. Ms. Klebba — thought that the drawn down information should be posted on the city's web site. Mr. Asleson stated that if this draw down work's there will a big improvement with this lake and also with the Chain of Lakes. C. Recycling Updates Next recycling Saturday will be October 15. Mr. Sullivan inquired if the Recycling Saturdays continue all year. Ms. Jin answered that it does except for August because of Blue Heron Days Celebration. Also Organics Recycling now has 138 residents signed up in the program. 7. ADJOURNMENT Ms. Andrzejewski made a MOTION to adjourn the meeting at 7:53 p.m. Motion was supported by Ms. Kaufenberg. Motion carried 5 - 0. Respectfully submitted, Mary Fogarty Office Tech I APPROVED MINUTES