5.5. SR 09-14-1998 - Laserfiche WebLink

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T'I'EM 5.5. Howard R, Green Company CONSULTING ENGINEERS September 8, 1998 File: 802640J-0071 CONSULTING ENGINEERS Formerly MSA Consulting Engineers Honorable Mayor and City Council City of Elk River 13065 Orono Parkway Elk River, MN 55330 RE: LAKE ORONO SEDIMENT REMOVAL PROJECT Dear Council Members: As you are aware, the Lake Orono Sediment Removal project has been on going for approximately a month. In this time, the Contractor has constructed the river diversion, prepared the three parcels to receive the river sediment along Trunk Highway 10, and has been constructing roadways for removal of the material in the lake bed. One issue that we have been struggling with along with the Contractor is how do we move the sediment from the eastern portion of the western lobe of the lake. Approximately the eastern third of the western lobe is much softer and higher in organic than we had anticipated. This makes it virtually impossible to have equipment operate on this material. No trucks will be able to drive on this material in order to have the material loaded into them. In working with Veit & Company, Inc., we have determined that the best way to remove the material from the eastern portion of the western lobe is to use backhoes en masse to stockpile the material in windrows. After the material has had some time to drain, bulldozers can operate on the windrows and push the material to the west to a point where it can be loaded into waiting trucks. This process is a significant change from the way the project was anticipated to be accomplished. We have agreed to pay Veit & Company, Inc. equipment time for the backhoes and bulldozers needed to move the material around to a point where it can be loaded and removed from the lakebed. It is difficult to estimate at this point in time, exactly how much additional dollars will be needed to accomplish this process. Our best guess at this point is that it may cost up to an additional $100,000.00 for the backhoe and bulldozer time. Our construction inspector is monitoring their process daily and keeping track of the pieces of equipment and number of hours each one works. The good news in this situation is that even with the additional cost of the extraordinary construction activities, the project will still be well within the original budget that was established in the feasibility study. In fact, it appears that Veit & Company, Inc. will still be under the second place bid. O:~PROJ\802640j\640-0807.sept.doc 1326 Energy Park Drive · St. Paul, MN 55108 · 612/644-4389 fax 612/644-9446 toll free 888/368-4389