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"EXHIBIT A" asaedAAa/a, 2odester AtcQe as a 1`� a, Inc. candkang gKguse",t ONd �T✓�d[tlCeCj .2335 Am / l 36 Coto G. W. Rosen, P.E. Robert W. Roeene, P.E. 9Z Paud, A*wedda 551>3 Joseph C. Anderlik, P.E. 636-4600 Bradford A. Lemberg, P.E. pAW0. Robert D. Frivaard, P.E. Richard E. Turner, P.EI. James('. Olson, P.E. Lawrence F. Foldsion, P.E. Glenn R. Cook, P.E. May 1, 1973 Keith A. Gordon, P.E. Charles A. Erickson Richard W. Poster Thomas E. Noyes Village of Lake Elmo Reber[ G. Schanicht Lake Elmo, Minnesota 55042 Re: Battle Creek Drainage our File No. 7038 & 7131B Gentlemen: We have reviewed the Engineering Study of the Battle Creek Drainage Area as submitted by Eugene A. Hickok and Associates, It is felt that the Village should respond to this report on the following items. 1. The proposed ponding basin within the Village of Lake Elmo is not correctly located, however, this can be considered a detail to be resolved during final design. 2. We are not at all in agreement with the acreage figures shown in thort and would question their accuracy. The text describes the Lake Elmo District as being 550 acres and shows part of this district to be west and south of the Freeways. On Table 16 the area of Lake Elmo is shown to be 570 acres. 3. The Highway Department rights -of -way is a contributor to runoff in the area and the Department should be contacted for participation. The area and cost breakdowns should show the Highway Department's share. 4. Cost estimates have been prepared based on construction cost only and do not include legal, engineering, fiscal and administrative costs. More important, no costs are associated with land acquisition for inundation areas, yet is is proposed that all construction costs be shared on some basis. 5. Probably the one problem of most significance will be that of cost allocation. Apparently, the author of the report feels that the equivalent area method is equitable but this again does not take into account expenses associated with ponding which results in lower construction costs of the needed downstream improvements. probably the most obvious factor was not mentioned and that is of peak flow. The design of facilities is based on peak flow and the need for the improvements are primarily to protect the creek from peak flows or storms. Therefore, it is felt that peak flows should be a major part of a method or formula to determine cost allocation. The Highway Department should also be urged to share in the costs. - 1 -