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Hakanson Anderson Assoc., Inc. Engineers, Surveyors & Landscape Architects March 17, 1987 Ms. Anne Norris Members of Planning and Zoning Commission city of Ramsey 15153 Nowthen Blvd. Ramsey, MN 55303 Re: Review of Barton's Sand & Gravel Application We have been requested to review the application of Barton Sand and Gravel for an asphalt operation and to assess the impacts on present airport operations. Based on our review of the applicant's conditional use permit appli- cation, we find the following: 1) The proposed heights of silos illustrated in the applicant's cross sections is 66' located at a ground elevation of 875'. The pro- posed silos fall within the existing 20:1 approach surface. As proposed, the silos would penetrate the approach surface by approximately 3.5'. The silos would, thus, be an obstruction for existing airport operations. 2) Proposed perimeter screening materials for the operation are picea and pinus species. Mature heights of these are generally in the 60-75' range for picea and 45-55' for pinus species. It is pro- posed by the applicant to plant sc~'eenln~ ~L~aterial on a b~rm a!eng the north side of CSAH 116 at elevations ranging from 880 to 895. While this would not pose an immediate problem to airport opera- tions, (assuming the initial height of materials to be six to eight feet), the proposed plantings would penetrate the existing approach surface after reaching approximately 30-35' in height. The plant screen is proposed for the entire width of the approach zone. All material penetrating the existing approach path would be an obstruction, and would require topping the trees to maintain them at a height below the approach path. This is generally an undesireable horticulture practice, particularly with conifers due to disfiguration of the trees. 3) The proposed operation potentially may emit dust and/or steam in sufficient quantities so as to be a hazard to safe flight opera- tions. 222 Monroe Street Anoka, Minnesota 55303 612/427-5860 Eugene J. Hakanson, P.F_ James M. W~nter, LS. Lawrence G. Koshak, RE. Peter P~ Raa~kka, RE.