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Current City Code 360.32 Placement of trees in the Right -of -Way permitted varieties: <br />• Hackberry <br />• Norway Maple (invasive) <br />• Sugar Maple <br />• Red Maple <br />• Linden <br />Attachment A is a report from the DNR about the diversity of Arden Hills' urban forest. This <br />survey was done in 2010 but provides a snapshot of Arden Hills' species distribution. More <br />information about this survey can be found here: <br />https://www.Irl.mn.gov/docs/2012/other/120339.pdf <br />The DNR has informed staff that they are currently in the process of completing an updated rapid <br />assessment community tree survey, and those results should become publicly available within <br />the next few months. <br />Discussion <br />Through review of past tree lists and decisions made on tree species, Public Works has <br />determined that it has been too restrictive of varieties and limits the ability to modify as the <br />environment changes. For the Arden Hills Public Works Design Manual, it is recommended that <br />it states reference to the "Arden Hills Preferred Street Tree Species List" (current proposed <br />version can be reviewed in Attachment B), which will be a livable document to allow flexibility <br />for staff to modify and improve as needed. <br />Attachment B includes the species that are recommended for street trees and includes a column <br />to indicate which class or roadway they would be suitable for (largely based on salt and drought <br />tolerance). <br />Arterials, Collectors and Local Streets <br />Collectors and Local Streets <br />• Local Streets only <br />* At a minimum, Arden Hills will follow the "20-10-5 rule" to ensure diversification of the city's <br />tree canopy. The "20-10-5 rule" incorporates canopy diversity goals into planning as it requires <br />that no more than 20 percent of one family, 10 percent of one genera, or 5 percent of one species <br />be planted in a given geographic area. <br />Similar to the Arden Hills Public Works Design Manual, staff is requesting direction to revise <br />the existing City Code 360.32 Placement of trees in the Right -of -Way permitted varieties to <br />reflect a more modern approach. The specific language has not yet been determined but staff <br />would provide that if revisions were desired. <br />Attachment C is a list of proposed urban forestry initiatives the City Council could consider that <br />staff pursue if given direction. These projects would be led by the Parks & Recreation Manager <br />in coordination with a consultant. <br />Budget Impact <br />N/A <br />Page 2 of 3 <br />