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Rick Hauser <br />March 16, 1998 <br />Page 3 <br />Additional Considerations <br />In addition to the depression volume and schematic discussed above, the following <br />recommendations should be considered in constructing the depression and the final landscaping <br />of the affected areas: <br />► To accommodate city drainage off Bohn's Point Road, the landscaping should incorporate <br />plant materials and groundcover resistant to runoff velocities and volumes. Another option <br />would be placement of a rock swale from the road to the low point near the lake or to the <br />lake. <br />► The existing drainage patterns direct runoff into the low area on the property to the south. <br />Final site grading, depression construction, and other drainage efforts should be coordinated <br />with the adjacent property owner to continue the current drainage pattern to the existing low <br />area or to correct it if it is viewed as a problem. Another option would be to redirect Bohn' s <br />Point Road drainage onto your lot (by a swale or berm) and east into the lake bypassing the <br />low area on the adjacent lot. <br />► Proposed grading around the front of your home should direct runoff into the proposed <br />depression in order for the plan to accomplish its objective. In addition, the depression should <br />only receive drainage from your lot and not from Bohn' s Point Road since the road drainage <br />would regularly fill and overtop the depression. <br />► Although the depression should not typically have standing water, the area will regularly <br />receive runoff and may not remain dry enough for healthy grass cover to be established. <br />Landscaping within the pond should be water tolerant, or even a rock garden with a pea <br />gravel base to encourage infiltration. <br />► The final depression design should be coordinated with landscaping efforts to satisfy <br />drainage volumes, runoff patterns, and aesthetic desires. <br />► The slopes off the southern side of the proposed house may become steeper than desirable <br />with the proposed depression and drainage swale. It may be necessary to install a buried pipe <br />in this area or construct a small retaining wall to convey drainage past the home. <br />If you have any questions about this memorandum or need additional assistance, please call me <br />at 476-6010.