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November 7, 1984 City of Roseville Re: Loehmann's Plaza Page 2 Of these, approximately 1,400 linear feet will be under the proposed building and should be removed for structural purposes. In addition, it is estimated that all of the other existing utilities will be removed during excavation of, the site. It is estimated that the cost for such removals will be $30,000. 3. In addition, the existing bituminous roadways will have to be removed in conjunction with the pipe removals and to accommodate site grading. It is anticipated that this material will have to be removed from the site for disposal, or,at the very least, carefully placed near the lowest levels of embankments within the proposed parking lot areas. The cost for such careful placement is included in the grading costs. If, however, it is determined that such materials must be disposed of off -site, it is anticipated that the disposal cost will be approximately $3,000 - $5,000. 4. Site Grading: Due to the extreme contour of the site, based upon preliminary grading concepts, excavations will be up to 18 feet deep near Fairview Avenue and embankments will be up to 24 feet near the northeasterly portion of the building. In total, it is estimated that excavation quantities will be within 110,000 to 130,000 cubic yards. Using $1.25/cubic ya-rd results in $162,500. Near the northeast corner of the site there exists an area of organic soils intermixed and overlain by uncontrolled fill and debris extending to a depth of approximately 10 feet. The water level in this location is estimated to be 5 feet below grade. Due to the moisture content of this material, it is anticipated that it will be necessary to utilize a drag -line to accomplish the required subcutting (muck excavation). Approximately 15,000 to 22,000 cubic yards of "muck"excavation is anticipated. At $5.00/cubic yard, this results in an estimated cost of $110,000. Improvements 1. Retaining Wall for Storm Drainage Pond In order to accommodate the City's storm drainage at the northeast corner of the site, it will be necessary to construct a retaining wall (in all probability structural concrete). This retaining wall will be approximately 300 feet long and 6 feet high. It is estimated that such a retaining wall will bost $35/square foot or a total of $63,000.00.