2009-04-28_PWETC_AgendaPacket - Laserfiche WebLink

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grassy area with knock-down barricades. There will be no berm or pond installed which allows emergency access if needed. Signage will also be installed. The City needs a 110' diameter turn-around for fire apparatus which would be at the Eustis intersection. Fire and Police agree with these plans. There are no pedestrian crossings as the Larpenteur Ave bridge will have pedestrian crossings. Member Vanderwall requested 30-40" truck turnaround in case of a disabled child needing school bus pickup. 7. Update on Twin Lakes Infrastructure Improvements and Storm Water Design Deb Bloom gave an update on Phase L The Council approved offer letters for the necessary easements to build Phase I of this project. Final plans that will be available by Friday by WSB for review. Phase I is Mount Ridge round-about and a segment of Twin Lakes Parkway, as well as building a storm water cistern. There- was a utility meeting last week to talk about needs in the corridor and a public meeting/open house on f'ebruary 26. Information is on the City web site. We need a storm water master plan for the area. We have worked with WSB on the storm water reuse and capturing run off from the road, filtering it with rain gardens within planting areas. We have some areas with petroleum contamination which will need a filtering conveyance system to prevent groundwater contamrnat~on. Member Felice asked where soil borings were taken. Deb explained they were taken along the center line of the road. Member Vanderwall asked about putting a pond expansion into an area close to soil borings on the east end. Deb Bloom explained that a liner could be put in. Member Willenbring asked about the location of planned cisterns. Deb explained they are all underground: Water will be coming off the street into rain gardens which will he used to water vegetation and can also be stored in the cistern far use in a dry period.. Member DeBenedt asked if the sediment trap basin is pre-cast or specially made. Duane explained that it is being made by adjusting an existing design. Member DeBenedt also requested that non-compacted soil be used around tree plantings. Duane Schwartz added that some of the funding could come from the Federal stimulus money ifwe are successful after an application process. A Member asked if the cisterns will be able to filter. Deb answered that all water will be filtered before entering the cisterns. Member Felice asked about the streetscape plantings. Deb explained that all material will be low maintenance, salt tolerant, native species that can grow in a