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CASE #g <br />CONSIDER CHANGE oRDER F°R ELMCREST PARK PARKING LOT <br />IMPROVEMENTS <br /> By: Leonard Lint6n, Civil Engineer II <br /> <br />Background: <br /> <br />Elmcrest Park parking lot improvements Were approved for construction on July 2004. Soil <br />borings indicated that clay soils were present Under most of the parking areas. The contractor <br />encountered soft wet soils in the southern area of the park while placing the class 5 aggregate. <br />They discontinued placing aggregate in that area. <br /> <br />The City received an inquiry from the local supplier of shredded tire chips last fal1. The vendor <br />was looking for an opportunity, to demonstrate the advantages-of using tire chips as fill over soft <br />ground. Staff felt the proposal had merit,' the City is looking at constructing trails over soft <br />ground in the future. The Master Trail plan shows a trail connecting Elmcrest Park and Central <br />Park following County Ditch 66. The proposed sanitary sewer extension alignments also follow <br />the county ditches. MaintenanCe crews Will need access to the neTM sanitary sewer manholes. <br />Construction of paths near the sanitary sewer alignment will provide an access route for the <br />maintenance crews. Construction of the test sections will allow evaluation of the different <br />construction methods. <br /> <br />Staff prepared plans for test sections to compare :the tire chips to trail construction methods <br />previously used in the City. The vendor donated the tire chips for the project. The test sections <br />are all approximately 150 feet long over similar ground. The test sections are described b&ow: <br /> <br /> Control-' Ffibric, iClass 5 Sand, .Fabric Tire Chips <br />Pavement 2.5" 2.5" ' 2.5" 2.5" <br />Class 5 Aggregate 6" :6" 6" 6" <br />Geotextile Fabric Yes <br />Sand ' 10" 18" <br />Ge°textile Fabric Yes Yes <br />Tire Chips 18" <br />Geotextile Fabric Yes <br /> <br />A diagram of the proposed sectiOn is attached. <br /> <br />The paving contractor was contacted about spreading the chips, all of their workers were laid off <br />so they were not able to do the work at that time. :The City asked for quotes from several small <br />contractors that had crews available and selected the lowest quote. The lowest quote was <br />received from Dryden Excavating for $10,000; The paving contractor will install the class 5 and <br />pavement on the sections, the City will not require the contractor to warranty the pavement for <br />these sections since they were constructed by others under City direction. <br /> <br />49 <br /> <br /> <br />