10-14-2002 Council Packet - Laserfiche WebLink

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ocr '"^‘^T/Nq Cj| f ^ ^2002 REQUEST FOR COUNCIL ACTION DATE: October 14,2002 ITEM NO.: /y Department Approval: Nane Gregory A. Gappa Title Director of Public Services Adminbtrator Reviewed: Agenda Section: Public Services Director's Report Item Description: Accept Quotation City Hall Drainage and Landscape Project We have been experiencing drainage problems in the City Hall with wet carpet near the exterior wall. This problem has been recurring since the building was built because when the building was constructed there was not sufficient grade to drain the water away from the building. This problem has been temporarily corrected several times by adding topsoil fill against the building to obtain suflicient grade for positive drainage away from the building. Adding the top.sail is only a temporary fix as the soil eventually settles resulting in inadequate drainage away from the building again. A permanent solution is needed to correct this drainage problem. The recommended solution is to excavate the material adjacent to the building, waterproof the exterior wall with asphalt sealer and a plastic barrier, install a compactable material that will not settle, place a plastic barrier on top of this material to drain the water away from the building, and then install landscaping rock on top of the plastic barrier. In the areas of concentrated roof drainage, boulder and splash rock spillways will be installed. The existing splash areas which are constructed of limestone are not very durable as the limestone is too porous and the rocks are broken down by the freeze thaw cycles. The attached sketch details the proposed solution. The remainder of the area will be graded to drain toward the sidewalk and then sodded. A sodded lawn will provide for better drainage away from the building, versus intensive landscaping planting and wood chips. Repairs to the area between the City and Police Department will be completed this fall. The area between the City Hall and Council Chambers should be repaired next spring as the same drainage problems exist in that area. This area is not as critical and can wait until next year. This will also reduce the scope of the work to be completed this fall. There will be Andorra Juniper shrubs planted in the landscaping rock area adjacent to the building. These are smaller low level plants that will not block the windows and will be easier to maintain. The original landscaping was planted too densely, was very aggressive, and so tall that it blocked the windows. It was costing the City more than $2,000 a year to trim and maintain the original landscaping. We have talked to several landscaping companies about the proposed drainage problem solution and options for changes to the landscaping. All of the companies agreed that the original landscaping consisted of too many large and aggressive plants, and also the variety of plants that did not fit together very well. They thought the original landscaping was not aesthetically pleasing, very well balanced, or a practical landscaping scheme. The landscaping varies from very tall and Page 1 of 2