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Agenda Packets - 2012/04/02
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Agenda Packets - 2012/04/02
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Last modified
1/28/2025 4:47:13 PM
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MV Commission Documents
Commission Name
City Council
Commission Doc Type
Agenda Packets
MEETINGDATE
4/2/2012
Supplemental fields
City Council Document Type
City Council Packets
Date
4/2/2012
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<br />EMERALD ASH BORER MANAGEMENT PLAN 2 <br />CITY OF MOUNDS VIEW | PUBLIC WORKS DEPARTMENT <br />City Hall's ball field and picnic facilities. Twelve (12) unprotected, green ash trees on public property <br />will be removed for reasons of poor condition/placement, These trees will be replaced with suitable <br />native trees of preferred species. <br /> <br />A contracted tree injection process of the chemical "Tree-age" (Emamectin benzoate) would protect <br />these trees for a period of two years. Repeat injections would have to be given to these trees every <br />two years thereafter. Fifteen (15) of these trees (smaller than 12" of diameter) could be treated by <br />City staff with the chemical "Imidacloprid" on an annual basis using the soil drenching (trough) <br />method. Once these smaller trees reached 12" of diameter, they too would need the aforementioned <br />injection treatment. The 2012 forestry budget includes funds for the injection of green ash trees in <br />parks. <br /> <br />The following shows the projected costs of one injection cycle to save these park trees: <br />• 87 green ash trees contractually injected (2 yr. coverage)...$80/tree = $6,970 <br />• 15 green ash trees (<12" dbh) treated by City crew (1 yr. coverage).....$20/tree = $300 <br /> <br />Other items to consider: <br />• Average removal cost of one park tree and stump: $300 <br />• Average replacement tree cost (2" dia. contracted): $200 <br />• Estimated removal and replacement costs for 102 park trees: $51,000 <br /> <br />EMERALD ASH BORER MANAGEMENT FOR CITY RIGHT-OF-WAY (BOULEVARD) <br />There are approximately 300 green ash trees on Mounds View right-of-ways (ROW) or boulevards. <br />The average size of these trees is about 15" of diameter as measured at 4.5 ft. above ground (dbh). <br />An estimated 250 of these trees lie on ROW in residential areas and add beauty, shade, stormwater <br />control and property value to the adjacent properties and to the community as a whole. The <br />remaining 50 trees are on commercial or business ROW and will not be a focus of this section's <br />consideration at this time due to low condition factors and somewhat removed placement. <br /> <br />Emerald Ash Borer, once established in the City, will likely kill most of these ROW trees within a <br />relatively short period. It might benefit the City to spread out this eventuality as long as possible to <br />not have to deal with the situation of a large number of trees all dying within a few years of each <br />other. The City must decide on a course of action that could begin in the immediate future <br />(2012/2013). There are three options: <br />1. Do nothing. Allow the ROW ash trees to remain in place as is with no protection and remove (and <br />maybe replace) infested trees as they die. <br />2. Remove some of the existing ROW ash trees over time (starting 2012) as they develop non-EAB <br />problems such as storm damage, structural problems and crowding. Then, replace those trees at the <br />end of each year. Grant funds could also be a source of funding to be used for ROW removal and <br />replacement in advance of the larger problem. <br />3. Inject the ROW ash trees on a two-year cycle starting in 2012 (see the following costs). <br /> <br />Here are the removal, replacement or injection estimates: <br />• 250 average ROW green ash trees/stumps removed: $300/tree X 250 = 75,000 <br />• 250 ROW trees replaced: $200/tree X 250 = $50,000 <br />• Total removal and replacement = $125,000 <br /> <br />• Contracted injection of 250 ROW ash trees (repeated every two years): $80/tree X 250 = $20,000 <br />
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