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VOA • <br />SANDERS <br />WACKER <br />WEHRMAN <br />BERGLY <br />December 7, 1994 <br />Mr. Joel Hanson <br />City Administrator <br />515 East Little Canada Road <br />Little Canada, Minnesota 55117 <br />RE: Dianna Lane Retaining Walls <br />Dear Joel, <br />LANDSCAPE 365 East Kellogg Boulevard <br />ARCHITECTS Saint Paul, Minnesota 55101 <br />AND 612- 221 -0401 <br />PLANNERS Fax: 612 - 297 -6817 <br />0 <br />I have reviewed the information furnished to me by Angela Popenhagen from Bonestroo Rosene <br />Anderlik and have visited the site to review the issues related to the Dianna Lane Retaining Walls. <br />My comments and recommendations are: <br />1. The existing tree cover and vegetation should be preserved to the maximum extent possible. <br />The existing walls should be removed and the site regraded to a 1:1 slope, taking care not to <br />disturb the existing trees. <br />2. There are several options for re- establishing vegetation on the slope, as described below: <br />Option A. Sod the slope with standard Bluegrass sod and stake the sod securely in place. <br />Plant sumac approximately 3' -0" o.c. throughout the sodded area. <br />Comment: The Bluegrass sod is an inexpensive solution that will take root quickly but <br />remain shallow rooted. The slope cannot be mowed and, therefore, the <br />appearance will be somewhat ragged. Eventually, the sumac will thin out the <br />grass and become the dominant material on the slope. <br />Option B. Sod the slope with prairie /wildflower sod as available from Prairie <br />Restorations, Inc. and stake it securely in place. Sumac could also be <br />interplanted but would not be required. It may be desirable to plant the top <br />edge with sumac to form a transition between the trees and the prairie grass. <br />Page 132 <br />