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• Mr. Steve Ach July 17, 1996 Page Two B. PRELIMINARY GRADING AND DRAINAGE PLAN • The Preliminary Grading and Drainage Plan is provided on a 100-scale drawing. We would recommend that the Developer be required to provide the Grading and Drainage Plan at a 50-scale. This will provide much more detail and a plan that is easier to read in areas that are relatively steep and therefore have many contours. • Lots 1, 13, and 24 are adjacent to an existing power line easement. Especially on Lots 1 and 24, and to a lesser degree on Lot 13, there is minimal space outside of the utility easement for construction of a home site. According to Glenn Sundeen of the Elk River Municipal Utilities, this is a major transmission line. Consideration should be given to reconfiguring lots such that lots which contain the power line easement would have a more suitable building site away from the power line. • Lots 1, 13, and 24 show septic systems to be located in the power line easement. There is also a storm sewer line and NURP pond located in this easement. The Developer will have to provide written documentation from the utility company to ensure that these facilities may be located • within the existing easement. • Approximately 750 feet in along Eagle Ridge Boulevard from Fillmore Street, the street has approximately 700 feet which is at 8% grade. This meets the City Ordinance as far as maximum street grade; however, with this steep of a hill with a slightly curved alignment and south-facing exposure, it will be very difficult for the Street Department to keep snow and ice off of it during winter months. We would suggest that the Developer look at flattening this out and grading the lots back further to provide a street that is much more maintainable and therefore safer to drive in winter months. • A detailed Drainage Plan will have to be submitted, reviewed, and approved prior to approval of the Final Plat. A couple of comments about the preliminary drain concept shown on this plan: There are catch basins located at the north end of the road. Approximately 1,300 feet of the road and adjacent property drains to this point. We question whether two catch basins are adequate to accept this amount of drainage. The same is true with the low point located approximately 600 feet west of Fillmore Street. This low point has 850 feet of relatively steep road draining to it from the west, and again only two catch basins, one on each side of the road, are provided. We question whether these will provide enough inlet capacity for the amount of runoff. The culvert shown along Fillmore Street should • be provided with catch basins to convey the water into the culvert and then continue drainage along the roadside ditch. 230/312-1509.jul