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Memorandum �Bonestroo <br /> 2335 Highway 36 W <br /> St.Paul,MN 55113 <br /> To: Melanie Curtis, City of Project: 1400 BracketYS Te1651-636-4600 <br /> Orono Point Rd. Date: 5-23-11 Fax 651-636-1311 <br /> From: Paul Bockenstedt, Client: City of Orono WWW•bonestroo.com <br /> Ecologist <br /> Re: Tree-buffer mitigation for 1400 BracketYs Point Rd. File No.: 139-11000-0 <br /> Dear Melanie: <br /> Thank you for the opportunity to meet with you and Mike Newberg, the land manager for the <br /> landowner's of 1400 Brackett's Point Rd. Please find below notes on observations for the site and <br /> recommendations for future approach for tree mitigation at the site. <br /> Background and General Comments <br /> A stretch of approximately 500 feet of shoreline buffer along the west shore of the 1400 Brackett's <br /> Point Rd. property had numerous trees and shrubs removed. Stumps observed, as well as <br /> comments from Mike indicate that the cut trees and shrubs included hackberry, elm and other <br /> native trees and shrubs, as well as the nonnative shrubs European buckthorn and Tartarian <br /> honeysuckle. I was pleased to see that the buckthorn and honeysuckle had been cut as these <br /> nonnatives tend to form thickets that hinder aesthetics and also impact native vegetation and <br /> wildlife. <br /> The herbaceous cover remains intact and includes a nice complement of native flowers, along with <br /> some native grasses and sedges. Approximately 30+ trees under 6 inches in diameter were cut <br /> from the slope as well as at least 6 native hardwood trees greater than 6 inches in diameter. A <br /> number of native hardwood trees were not cut down. Several of these were limbed to <br /> approximately 12-15 feet from the ground level. Several of the retained trees are of nice form and <br /> quality and include sugar maple, hackberry, and one bur oak. Two trees that were not cut include <br /> one (�18"dia.) cottonwood with a top that has greater than 50% die-back and one hackberry <br /> (�12"dia.) with approximately 30% die-back. We discussed that the cottonwood could be <br /> cut/removed, primarily for potential safety issues. We also discussed that the hackberry could be <br /> trimmed to remove dead limbs and monitored for further decline. <br /> Restorative Activities <br /> While on site, we discussed several activities that will help enhance the native character of the <br /> buffer vegetation, while also being sensitive to re-establishment and maintenance of adequate <br /> shoreline buffer. Each of the recommended activities is described in more detail below. <br /> Management of invasive/nonnative plants <br /> There are several species on invasive/nonnative plants within the buffer that can be spot treated, <br /> or monitored over time to minimize the potential that they damage the quality of existing buffer <br /> vegetation. Specifically, European buckthorn and Tartarian honeysuckle can be re-cut in fall 2011 <br /> while they still hold leaves, but after other buffer vegetation has gone dormant. Spot treating the <br /> cut surfaces of stems for these species will minimize the potential of resprouts—treat with a 20- <br /> 25% solution of Roundup, Garlon 3 or equivalent product. The invasive nonnatives Garlic mustard <br /> and leafy spurge are also present here. Garlic mustard can be treated between November and <br /> March (over winter when temperatures are above freezing) with a 3-5% solution of Roundup. <br /> C:\Users\mcurtis\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.0utlook\ZOZACOSC\1400 Bracketts Point Rd tree-buffer mitigation mem0_PJB_Melanie Curtis_5-23-11.docx [TNS Ob- <br /> Page 1 of 2 <br />