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<br /> - <br /> City of Arden Hills <br /> Keithson Drainage Improvement <br /> Objections to Proposed Assessment <br />. Summary and Response <br /> July 27, 1992 <br /> Summary of Events Reqardinq the Keithson Pond Proiect <br /> The original plat for this property showed a pond located in <br /> the area of what is now Keithson Drive and the Crimmins and <br /> Magers\Tredal lots. This pond was to have been reconfigured <br /> and relocated to the rear of the four southernmost lots on <br /> the western side of the plat. The reconfigured pond was to <br /> have been sized to hold the incremental runoff generated by <br /> the impervious surfaces constructed in the development. <br /> Based upon a topographic map supplied by E.G. Rud, it was <br /> anticipated that the pond would drain in an overland channel <br /> that was, and still is, located behind the Crimmins <br /> property. Presumably, this had been the drainage route for <br /> the original pond. A weir with an approximate elevation of <br /> 972 feet above MSL was planned to meter the runoff. Runoff <br /> from the street was to have been channeled to the new pond <br /> through piping. <br /> When the original plat was acted upon by the Council the <br /> developer asked if the City's engineer could be used to <br /> design the utility work in the plat. Short-Elliot- <br />. Hendrickson, the City's engineer, deferred the request and <br /> was never under contract to this developer for this project. <br /> The developer, as is always the case, had two options <br /> regarding the construction of improvements (Le. , streets <br /> and utilities). Either he or the City could build them, and <br /> in the latter case, the costs would be 100% assessed. The <br /> former approach was chosen, where the builder installs the <br /> utilities and upon approval, dedicates them to the City. In <br /> either case, the City's engineers would have overseen the <br /> project, which is what Short-Elliot-Hendrickson did. <br /> Approximately one year after the original plat was approved, <br /> the developer asked that the pond easement area be amended. <br /> Rather than having it extend behind the four southwesterly <br /> lots, the pond and its associated easement was to be <br /> concentrated in an area between what are now the lots of <br /> Magers/Tredal and Crimmins. This area, which was originally <br /> platted as a lot, was to be split and attached to the <br /> adjacent lots. A drainage easement was to cover this entire <br /> area and parts of both adjoining lots. As with the earlier <br /> plan, the pond was to drain overland to the southwest in the <br /> existing channel. Since the elevation of the channel had <br /> been found to be higher than what had originally been <br /> 'believed, the metering weir was eliminated. Also, since the <br />. street runoff no longer had to be carried to the back of the <br /> lots, its piping was eliminated. This revision was <br /> approved. <br /> Page: 1 <br />