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20230104 Environmental Board Packet Combined
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20230104 Environmental Board Packet Combined
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Last modified
11/9/2023 10:21:29 AM
Creation date
12/28/2022 11:15:24 AM
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Environmental Board
Env Bd Document Type
Env Bd Packet
Meeting Date
01/04/2023
Env Bd Meeting Type
Special
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<br />Shenandoah Improvements Feasibility Report <br />City of Lino Lakes, MN <br />WSB Project No. 018901-000 Page 2 <br />The site is relatively flat, with an elevation difference of approximately 4 feet across <br />the areas of proposed work. A main feature of the site, and driver of this project, is a <br />drainage ditch that flows across the site from south to north. The ditch c omes in <br />from a culvert under Arrowhead Dr and takes multiple 90 degree turns, running <br />north, east, north, west, and finally north to a culvert under Birch St. The channel is <br />well vegetated and there don’t appear to be any major areas of slope failure or <br />excessive erosion. The upstream culvert from Arrowhead Dr comes in at an elevation <br />of 886.15 feet while the downstream culvert under Birch St has an elevation of <br />886.05 feet . The 0.1 foot elevation difference across the ditch means it functionally <br />behaves as flat and the drainage in it is essentially ponded and draws down as such. <br />A site visit in September 2022 was used to record the existing natural resources and <br />vegetation conditions of the site. The land north of the east -west portion of the ditch <br />within t he project area consists of a Type 2 Fresh Wet Meadow wetland dominated <br />by cattails, likely narrow -leaved (Typha angustifolia ). Reed canary grass (Phalaris <br />arundinacea ) is dominant along the ditch and banks. The land south of the east -west <br />portion of the d itch within the project area is a Type 1/2 Seasonally Flooded/Fresh <br />Wet Meadow wetland dominated by stinging nettle (Urtica dioica ). An Aster spp. was <br />also observed in low abundance throughout the site. The southeast stretch of the <br />ditch has native red -osi er dogwood (Cornus sericea ) along it in moderate density. <br />Overall, the herbaceous layer within the project area has little diversity. A map of the <br />delineated wetland is below.
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