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08-18-98
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Minutes-Board Or Commission PLZ 00900
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1998
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08-18-98
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was no sufficient vibration to cause damage. Schiferl said he was more concerned about reducing the <br />vibration problem and testing for the problem. <br /> <br />Brad Anderson, stated he was the design engineer of the project for the City of Minneapolis. Anderson stated <br />that, as the fill height of the reservoir is increased in Phase 2, the location of the equipment relative to the <br />street or adjacent ground level will be separated more and more. In that process, the driving energy will be <br />dissipated and will not travel into the ground as readily as it does at grade. When it comes to compaction of <br />the soils, static methods could be used to reduce the dynamic forces being impacted into the soils. That would <br />reduce vibration considerably. The relation of vibration and trucking can only be tracked by seismic <br />monitoring. When traffic is concentrated, there would be a perception of vibration. <br /> <br />Schiferl stated concerns have been raised that, if the proposal is approved, that the soil would be moved twice <br />creating more truck traffic. Schiferl asked if the soil would be compacted. Anderson answered that the soils <br />placed in the barrow pit would be free dumped and leveled to the allowable maximum height. Therefore, the <br />soil would be in a loose condition. The soil would have to be loaded by backhoe into trucks and transported to <br />the project for placement and compaction. Schiferl asked if there was any way to cause less dust, less noise, <br />and less vibration during the dumping function. Anderson responded, from a placement point of view, the <br />soils could be placed in the eastern position closest to the property line building a berm there. Then, there <br />would be less exposed surface. Dust conditions would have to be monitored. <br /> <br />Thomas commented that trucks had round wheels and caterpillars have tracks. When soils are dumped, cats <br />push the soil into a pile and then must come back. The equipment used to do the barrow pit is huge <br />earthmoving equipment. The studies that may have been done on trucks going down the street cannot be <br />equated to what is happening behind Wexford. Kramer said they monitored heavy equipment used in deep <br />excavation in digging sewers for the City of Minneapolis. Thomas said Anderson stated vibration depended <br />upon the type of soil. New Brighton clay vibrates and carries a long way. <br /> <br />Hartman stated the bulldozers and the backhoes are causing vibration. If soils are going to be brought to the <br />barrow pit, bulldozers will push the soils around. When the soils are dug up, the backhoes will be brought in <br />affecting the Wexford and Columbia Heights residents. The bulldozers and the backhoes working on the site <br />are causing the vibration, not just the truck traffic on the street. Hartman said Columbia Heights approved the <br />original project and the original number of truckloads. Due to the barrow pit, fewer truckloads go through <br />Columbia Heights. Now Columbia Heights is asking that the project be spread over two years, but should <br />have no bearing on the New Brighton Planning Commission’s decision. <br /> <br />Jerry Reisen, of Veit Company, stated it has been suggested there may be economic savings and would <br />benefit the contractor. Veit bid the project based upon being allowed use of the site when material was <br />available. If Veit is not allowed to do this, the price of the work increases and would be passed on to <br />taxpayers of Minneapolis. <br /> <br />Kramer said that he did not want to be argumentative, but he differed with some statements made tonight. <br /> <br />Schopf asked Teague if the New Brighton Engineering Department could give us some input on the noise and <br />vibration issue. Teague said he would check with the City Engineer, but did not know if Mr. Proper is an <br />expert on the subject. <br /> <br />Schiferl asked about the days and hours of the hauling. Kramer responded it is Monday through Saturday. <br />Schopf said the project engineer stated in a letter the work hours would be 7:00 a.m. to 5:30 p.m., but did not <br />specify the days of the week. <br /> <br /> <br />I:\COMMISSIONS\PLANNING\MINUTES\1998\08-18-98.WPD <br />8 <br /> <br />
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