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City of Arden Hills Planning Commission Meeting for April 3, 2019 P:\Planning\Planning Cases\2019\19-003 Bethel Sci Addition - SP\Memos Reports Page 3 of 8 The campus has frontage on Valentine Lake, which is classified as a Natural Environmental lake in Section 1330.02 of the Shoreland District Regulations. The minimum structure setback from the ordinary high water level of Valentine Lake is 150 feet. The proposed addition to the Academics Common building would be located 118 feet from the ordinary high water level at its closest point for a proposed encroachment of 32 feet. A Variance from the minimum required setback was granted at the March 26, 2018 City Council Meeting. 3) Lot Coverage (Section 1320.06) The proposed addition would result in an additional 6,224 square feet of impervious coverage on the campus. The previously approved CUP for the Bethel University limits the total lot coverage of impervious surfaces to 25 percent and requires a minimum landscape lot area of 75 percent. The impervious surface coverage for the campus including the proposed addition would be 21.58 percent and the landscape lot area would be 78.42 percent. Section 1325 – General Regulations A. Landscaping and Tree Preservation – Section 1325.05 and Section 1325.055 The landscape plan includes 12 new trees with a range of sizes from two to four caliper inches for a total of 29 caliper inches. The trees would be planted along the proposed sidewalk and the drop- off loop as shown on the image in section H. B. Minimum Caliper Inches and Tree Ratio – Section 1325.05, Subd. 1(F)(1)(2) The Zoning Code requires that a minimum number of caliper inches of trees be provided based on the gross square footage of the building on the property. For the 20,000 square foot addition, the minimum required caliper inches is 63 inches. However, much of the Bethel campus is wooded, and the current amount of caliper inches on the site exceeds these minimum requirements. 4) Perennials and Shrubbery – Section 1325.05 Subd. 1(F) (6) The Zoning Code requires that a minimum of 10 percent of the total landscaped area shall be covered with perennials or shrubbery. The majority of the campus site is currently landscaped or forested and will remain unchanged. Approximately 456 square feet of perennials and shrubbery would be planted within the project area. 5) Tree Preservation – Section 1325.055 A survey of the significant trees in the project area was completed in May 2018. The survey indicates a total of 32 caliper inches of significant trees in the project area will be removed as part of the proposed addition. The Tree Preservation Ordinance permits the removal of up to 10 percent of the significant trees on the site before mitigation is required. Based on the proposed removal and the total caliper inches on the Bethel University campus, no replacement trees are required at this time. It should be noted that the proposed landscape plan is replacing a total of 29 inches, which would be the required caliper inch replacement if this project were completed on its own site, apart from the presence of large forested areas.