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firAS s `l- <br />SSOCIATES, I <br />Consulting Engln..rs —land Survoyan <br />August 9, 1989 <br />CITY COUNCIL • <br />515 East Little Canada Road <br />Little Canada, MN 55115 <br />RE: REAR YARD SWALES IN THUNDER BAY AREA <br />Dear Councilmembers: <br />500 West Highway 96 <br />St. Paul, Minnesota 55126 <br />4843301 <br />We have surveyed the rear yard ditches in the Thunder Bay area and <br />have drawn profiles of the existing ground line. <br />Three of the four ditches surveyed are close enough to the original <br />grade to make any adjustment unwarranted. If these ditches were kept <br />clean and mowed, there would be no problem. Some lots are trimmed <br />to the rear lot line and others are not. We see in some places that <br />cottonwood trees are almost 8 feet high. If these were cut down <br />and the area kept mowed and free of debris, the ditches can be <br />maintained. If not, these trees can grown 50 feet high in a short <br />time. <br />The fourth ditch ( #1) North of Allen between Thunder Bay and Ontario <br />has been filled in by construction currently on Ontario. <br />We are discussing this with the building official as to the status of <br />occupancy permits of the various houses involved. <br />Yours truly, <br />Donald 0. Carley, P.E. <br />Vice President <br />DOC /kt <br />Page 20 <br />