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Home My WebLink AboutArborist Report_2  Page 1 Memorandum To: Tiffiny Brown, Burnstead Construction LLC From: Bob Layton CC: Date: 7/24/2012 Re: Maplewood East – Alder and Cottonwood Assessment Ms. Brown, Per your request I have completed an assessment of the red alder trees and black cottonwood trees at the Maplewood East site in Renton. Tree Summary Tables are attached which identify all of the non-viable trees assessed. The red alder on the property and on adjacent properties to the north and west is in very poor condition. Very few alder trees in the subject area are expected to survive for another five years. The majority are showing signs of decline, evidenced by dead, broken and dying tree tops. Several of the surveyed trees have died, rotted and have fallen down. These are indicated on the attached map as “DOWN”. Non-viable trees are shown X’d in “blue” with a “blue” tree number. A total of 62 of the alder trees identified on the survey are considered non-viable and are either dead or in vast decline and are not expected to survive for another five years. These alder trees regenerated on the site after a clearing and grading event, likely 20 to 30 years ago. This pioneer species readily colonizes disturbed spaces. It is naturally designed to grow fast and to prepare the forest floor for the second generation of longer living tree species. On mechanically disturbed sites, longevity is highly decreased, with decline occurring at around 20 to 30 years or less. Trees at the end of their useful life-spans begin to decline and die back from the top downwards. Once this mortality spiral begins, there are no methods to reverse it. Five cottonwood trees were also found to be in a non-viable and dangerous condition. These small diameter trees have extremely high height to diameter ratios. These are considered dangerous trees as the risk of stem breakage is very high, especially with the development of basal decay as these subject trees have. As I discussed in my original assessment report, there are several high-risk cottonwood trees within the right-of-way of 132nd Street, many of which are completely dead. These need to be removed prior to fall windstorms to reduce the risk of damage or injury. You will note on the attached tree map that I made a few species corrections to the survey. Three of the trees on the subject property identified as alders are actually two big leaf maples and one bitter  Page 2 cherry, all of which appear to be in a viable condition. I also made comments on trees existing within the utility easement along the west perimeter. There are no trees within this easement that have a high retention value. Utilizing the tree map, you should be able to re-work the Tree Retention Worksheet for the property. Please let me know if I can be of any assistance or you have any questions or concerns. Sincerely, Bob Layton ISA Certified Arborist #PN-2714A Certified Tree Risk Assessor #233 1 TREE CONDITION SUMMARY International Forestry Consultants Date:7/23/2012 Redwood Acres For: Maplewood Park East 15240 SE 132nd ST Inspector:Layton Renton Crown Bole Roots Tree #RecommendationPriorityConditionSpeciesNative/PlantedDIA.HeightH/DDriplineGreen %LimbTipsAsymmetricColorDecayIncluded BarkSeams-PitchingBroken - Topped -SproutsCrook-Fork-sweepLeanDecayExposedSeveredComments N S E W 7439 14 red alder N 10 58 70 2 3 2 4 3 old broken top, multiple regenerated tops 7462 14 red alder N 13 67 62 4 4 3 3 in decline, wood borer infestation 7468 11 red alder N 9 58 77 3 3 1 4 broken top, in decline 7466 11 red alder N 10 66 79 3 3 1 4 broken top, in decline 7470 13 red alder N 11 55 60 4 3 2 4 dead and broken top 7472 13 red alder (2)- 9,9 N 9 48 64 4 3 2 4 dead and broken top 7469 14 red alder N 10 53 64 4 3 3 4 dead top, in decline 7442 17 red alder N 14 45 39 4 4 3 4 2 dead and broken top 7473 15 red alder N 13 52 48 4 4 3 4 dead and broken top 7479 10 red alder N 13 52 48 3 3 1 3 broken top, in decline 7472 10 red alder N 12 7 7 5 5 dead snag 7489 10 red alder N 8 10 15 5 5 dead snag 7485 14 red alder N 10 62 74 4 3 4 3 cavity at base, decline 7488 13 red alder N 14 63 54 3 3 4 3 cavity at base, decline 7495 10 red alder (2)- 9,8 N 9 55 73 5 5 both dead, within last couple years 7496 15 red alder (2)- 8,10 N 10 50 60 4 3 4 4 8" is broken snag, 10" is in decline, dead top 7557 13 red alder (2)- 10,11 N 11 60 65 5 5 3 both dead 7559 14 red alder N 9 14 19 5 5 4 dead snag 7560 11 red alder N 15 77 62 4 3 2 2 dead top, in decline 7516 11 red alder N 12 72 72 4 3 1 3 dead top, in decline Recommendation Crown %Condition Score Priority Condition Code X Remove 0 No Action 5 0%5 severe 1 Immediate 11 - +Poor RD Remove Defect CC Crown Clean 4 10-20%4 poor 2 Six Months 5 - 10 Fair-Monitor DW Remove Dead wood RC Raise Canopy 3 20-40%3 moderate 3 1 year +0 - 4 Good EW Remove End Weight CR Reduce Canopy 2 40-60%2 fair M Monitor-Re-evaluate in 1-2 years 1 60-70%1 noted H/D = height/diameter ratio > 50 potentially hazardous 0 70%+ Green % for evergreen species only 1 TREE CONDITION SUMMARY International Forestry Consultants Date:7/23/2012 Redwood Acres For: Maplewood Park East 15240 SE 132nd ST Inspector:Layton Renton Crown Bole Roots Tree #RecommendationPriorityConditionSpeciesNative/PlantedDIA.HeightH/DDriplineGreen %LimbTipsAsymmetricColorDecayIncluded BarkSeams-PitchingBroken - Topped -SproutsCrook-Fork-sweepLeanDecayExposedSeveredComments N S E W 7515 14 red alder N 9 51 68 5 5 4 older dead snag 7572 14 red alder N 12 35 35 5 5 4 dead snag 7588 13 red alder N 11 25 27 5 5 3 dead snag 7591 9 red alder N 12 57 57 3 2 1 3 dead top, in decline 7590 13 red alder N 9 45 60 5 5 3 dead snag 7565 14 red alder N 10 40 48 5 5 4 dead snag 7562 15 red alder N 8 14 21 5 5 5 older dead snag-hungup 7599 12 red alder N 8 46 69 3 3 3 3 dead top, in decline 7603 14 red alder N 10 54 65 5 5 4 90% dead 7601 15 red alder N 13 57 53 5 5 5 extensive basal decay, dead top 301 9 red alder N 11 76 83 3 3 1 2 in decline, dying top 7608 11 red alder N 12 58 58 4 4 3 dead top, vast decline 7553 14 red alder N 9 57 76 5 5 4 older dead tree 7625 13 red alder N 11 46 50 4 3 2 4 broken, dead top 7633 10 red alder N 11 56 61 4 3 3 dead top, declining 302 11 red alder N 13 52 48 3 3 2 3 dead, broken top 303 15 red alder N 9 41 55 4 3 4 4 90% dead 7642 10 red alder N 10 61 73 4 4 2 dead top, declining 7644 19 red alder N 9 52 69 5 5 4 5 90% dead 7647 19 red alder N 10 56 67 5 5 4 5 80% dead Recommendation Crown %Condition Score Priority Condition Code X Remove 0 No Action 5 0%5 severe 1 Immediate 11 - +Poor RD Remove Defect CC Crown Clean 4 10-20%4 poor 2 Six Months 5 - 10 Fair-Monitor DW Remove Dead wood RC Raise Canopy 3 20-40%3 moderate 3 1 year +0 - 4 Good EW Remove End Weight CR Reduce Canopy 2 40-60%2 fair M Monitor-Re-evaluate in 1-2 years 1 60-70%1 noted H/D = height/diameter ratio > 50 potentially hazardous 0 70%+ Green % for evergreen species only 2 TREE CONDITION SUMMARY International Forestry Consultants Date:7/23/2012 Redwood Acres For: Maplewood Park East 15240 SE 132nd ST Inspector:Layton Renton Crown Bole Roots Tree #RecommendationPriorityConditionSpeciesNative/PlantedDIA.HeightH/DDriplineGreen %LimbTipsAsymmetricColorDecayIncluded BarkSeams-PitchingBroken - Topped -SproutsCrook-Fork-sweepLeanDecayExposedSeveredComments N S E W 7402 10 red alder N 12 64 64 4 4 2 dead top, in decline 7665 16 red alder N 14 62 53 4 4 3 5 90% dead 7536 16 red alder (2)- 11,11 N 11 72 79 4 3 2 4 3 dead, broken tops 7534 15 red alder N 9 10 13 5 5 5 older dead snag 7543 15 red alder (2)- 9,10 N 10 65 78 5 4 3 3 dead top, in decline 7546 14 red alder N 8 57 86 5 4 2 3 dead top, in decline 7542 13 red alder N 10 47 56 3 3 2 5 broken top 7541 14 red alder N 11 62 68 3 3 1 4 3 broken top 7524 13 red alder N 11 54 59 4 3 2 4 broken top 7483 16 red alder N 10 51 61 4 4 3 5 dead, broken top 7486 14 red alder N 13 61 56 3 3 3 5 dead, broken top 7488 16 red alder N 8 53 80 4 4 2 3 3 dead top 7482 10 red alder N 9 50 67 3 3 1 3 dead top 7480 15 red alder N 9 9 12 5 5 5 older dead snag 7474 14 red alder N 9 52 69 4 4 2 4 dead top 7675 17 red alder N 16 30 23 5 3 4 5 90% dead 304 3 black cottonwood N 11 105 115 3 poor taper 7668 4 black cottonwood N 16 121 91 4 basal cavity, poor taper 305 7 black cottonwood N 12 95 95 3 4 suppressed, lean, high risk 306 3 black cottonwood N 9 80 107 3 poor taper 7643 5 black cottonwood N 13 88 81 2 3 poor taper Recommendation Crown %Condition Score Priority Condition Code X Remove 0 No Action 5 0%5 severe 1 Immediate 11 - +Poor RD Remove Defect CC Crown Clean 4 10-20%4 poor 2 Six Months 5 - 10 Fair-Monitor DW Remove Dead wood RC Raise Canopy 3 20-40%3 moderate 3 1 year +0 - 4 Good EW Remove End Weight CR Reduce Canopy 2 40-60%2 fair M Monitor-Re-evaluate in 1-2 years 1 60-70%1 noted H/D = height/diameter ratio > 50 potentially hazardous 0 70%+ Green % for evergreen species only