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TO: <br /> <br />FROM: <br /> <br />RE: <br /> <br />DATE: <br /> <br />Mayor and City Council <br /> <br /> Tree Inspector <br /> <br />Monthly Report for April <br /> <br /> April 20, 1979 <br /> <br />Attached is a supplementary pie chart presenting data from the summer <br />1977 survey of Ramsey's trees by Mr. Dahlman. <br /> <br />About 1/3 of Ramsey is "Wooded"; 2/3 "Open". I suppose a gross interpre- <br />tation would be that 2/3 of our interest is in planting. If we consider <br />"Residential" (under five acres), more than one-half is "Open." <br /> <br />More than a half-million trees larger than 4" are statistically predicated <br />on Ramsey's 6000 wooded acres. At the time of the survey, 10% of the Red <br />Oaks were standing dead; only 1% of the White Oaks dead; and 25% of the <br />Elm trees were standing dead. <br /> <br />Of Ramsey's tree population, then about half are vulnerable to Dutch Elm <br />Disease and Oak Wilt. <br /> <br />Of this vulnerable population, 10% of the oaks and 25% of the Elms were <br />identifiable as dead. No estimate of disease loss was made since the ones <br />cut and disposed of was not possible, not visible. This implies 20,000 <br />dead Oaks and Elms still standing in 1977, larger than 4" in diameter. <br /> <br />My certification as tree inspector lapses in May. To be certffied fop <br />this year, attendance at a one day short course at the St. Paul Campus <br />Res ectf llY'haspbeenurequired in past yeams. The cost is around $4__0_~~g>~7, '~q~ ~ <br />B. Bacon ' ~)~A'J~ ~ <br /> <br /> <br />