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Urban Forest Strike Team Task Specialist Reintroduction. Urban Natural Resources Institute June 2, 2011. Dudley R. Hartel, Center Manager Eric Kuehler, Technology Transfer Specialist John Slater, Arkansas U&CF Partnership Coordinator Urban Forestry South Athens, Georgia. - PowerPoint PPT Presentation
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Dudley R. Hartel, Center Manager
Eric Kuehler, Technology Transfer Specialist
John Slater, Arkansas U&CF Partnership Coordinator
Urban Forestry South
Athens, Georgia
Urban Forest Strike Team Task Specialist Reintroduction
Urban Natural Resources Institute
June 2, 2011
Urban Forest Strike Team
USDA FS, Region 8Southern Research StationUrban Forestry SouthUSDA FS, Northeastern Area
Southern Group of State Foresters
UFST Webinar Series
Task Specialist – Tree Risk (June 2)
State Agencies – UFST Response Role (July 14) U&CF Coordinators – First 72 Hours+ (August 11) Task Specialist – Mobilization (September 8) UFST – Safety (October 13) UFST – Program Status (November 10) Team Leader – Lessons Learned (December 8)
Webinar Outline
Current UFST objectivesUFST risk rating criteria
Target, Size of part, Probability of failure
FEMA 325 Debris Standards Hangers Removals
ANSI A300 (Part 9) Tree Risk Assessment UFST tree risk assessment objectives
Based on ANSI A300 Context, target, and scope
Current UFST Tree Risk Assessment Objectives
•Provide municipality with a list of hazardous, storm-damaged trees•Prioritize the risk to help with interim management planning•Identify trees that potentially qualify for FEMA reimbursement•Spatially locate storm-damaged trees for ease of mitigation treatment
Contractors can easily find them
Current UFST Tree Risk Assessment Attributes
•Species (or genus)•DBH•Risk ratings (target, size, probability)•Risk management recommendation
Prune Remove Inspect
•FEMA management recommendation Non-FEMA Prune Remove
UFST Risk Ratings
TargetPeople/property potentially affected by tree failure
Size of PartSize of the part of the tree likely to fail
Probability of FailureLikelihood that failure will occur
Mitigation recommendationBased on risk ratings
[Refer to WebDoc-2011-June-03]
UFST Risk Ratings
Target - People/property potentially affected by tree failure
1 – Infrequent: limited-use trails, remote areas, low-use roads2 – Occasional: neighbourhood roads, parks3 – Frequent: high-use playgrounds, parks, picnic areas4 – Constant: immovable objects
[Refer to WebDoc-2011-June-03]
UFST Risk Ratings
Infrequent Frequent
UFST Risk Ratings
Size of Part - Size of the part of the tree likely to fail
Reason for proposed changeTo reflect the degree of the hazard
Don’t use 1 or 2 for whole tree removal
Current UFST ratings
1 – < 8” 2 – 8-18” 3 – 18-24” 4 – >24”
Proposed ratings
1 – < 3” 2 – 3-5” 3 – 6-15” 4 – >16”
[Refer to WebDoc-2011-June-03]
UFST Risk Ratings
Probability of Failure - Likelihood that failure will occur
1 – Low: the part may take a long time to fail2 – Possible: could fail given the right conditions (wind, ice, snow)3 – Likely: it is a matter of time for failure4 – Imminent: the failure could occur at any moment
[Refer to WebDoc-2011-June-03]
UFST Risk Ratings
Risk Management Based on risk ratings
• No Action needed
• Prune (Hazard) – remove hanging limbs
• Prune (Other) – prune non-hazard limbs
• Remove (Hazard) – whole tree removal due to hazards
• Inspect (Immediate) – possible imminent hazard, immediately have manager inspect more thoroughly
• Inspect (Routine) – have manager inspect more thoroughly
[Refer to WebDoc-2011-June-03]
FEMA 325 Debris Management Standardshttp://www.fema.gov/pdf/government/grant/pa/demagde.pdf
•Eligible debris•Generated by the disaster event•Debris located within designated disaster area•Debris located on applicant’s improved property or rights-of-way•Debris removal is the legal responsibility of the applicant
[Refer to WebDoc-2011-June-02]
FEMA 325 Debris Management Standardshttp://www.fema.gov/pdf/government/grant/pa/demagde.pdf
•Hazardous Limb Removal (Hangers)•Generated by the disaster event•Located on improved public property
• or impacting it•> 2” diameter at the break•Still hanging in the tree and threatening public-use areas
[Refer to WebDoc-2011-June-04]
Located on improved public property or impacting it (Trails)
Management StandardsHazardous Limb Removal (Hangers)
Management Standards
> 2” diameter at the break and still hanging in the tree and threatening public-use areas
Hazardous Limb Removal (Hangers)
FEMA 325 Debris Management Standardshttp://www.fema.gov/pdf/government/grant/pa/demagde.pdf
•Hazardous Trees•Must satisfy all of these
•Caused by the disaster
•Immediate threat to lives, public safety, or improved property
•> 6” DBH
•Must satisfy at least one of these•> 50% crown damage or removal
•Split trunk or major branches exposing heartwood
•Fallen or uprooted within public-use area
•Leaning > 30o
[Refer to WebDoc-2011-June-04]
Management Standards
50 % Crown Loss%
Hazardous Trees
Heartwood Exposed
Management StandardsHazardous Trees
Management Standards
Fallen or uprooted within public-use area
Hazardous Trees
Management Standards
Leaning > 30o
Hazardous Trees
FEMA 325 Debris Management StandardsFEMA Management Based on observations
• Non-FEMA• mitigation actions do not qualify for FEMA reimbursement
• Prune (>2” Limbs) • removal of broken limbs qualifies for FEMA reimbursement
• Remove (>50% Loss) • removal of tree qualifies for FEMA reimbursement due to 50% crown loss
• Remove (Heartwood) • removal of tree qualifies for FEMA reimbursement due to exposure of heartwood in stem or main branch(es)
• Remove (>30 Lean) • removal of tree qualifies for FEMA reimbursement due to a 30o stem lean [Refer to WebDoc-2011-June-04]
ANSI A300 Part 9Tree Risk Assessment
Recently released Allows UFST to specify our Scope of Work Industry standards / Reduce liability Specifications include:
ObjectivesScope of workLevels of tree risk assessmentType of risk analysis dataReporting methodology
[Refer to WebDoc-2011-June-01]
UFST Post-disaster Rapid TreeRisk Assessment Specifications
Objectives Quickly ID storm-damaged, hazardous treesIn designated areasProfessional recommendations to mitigate risk
Scope of workAssess only trees
•Damaged by current natural disaster•In designated boundaries•On or impacting improved property•Meet criteria for FEMA 325
Hazardous treesHazardous limb removal (Hangers)
Provide tree risk ratings / mitigation recommendations
[Refer to WebDoc-2011-June-01]
UFST Post-disaster Rapid TreeRisk Assessment Specifications
Levels of tree risk assessment Depends on where that tree is locatedLevel 1
•Public/private property•CANNOT be accessed legally/safely
No stepping on private propertyWill not be able to view all sides of the tree
•Poses obvious risk to publicLevel 2
•Trees on public property•Can be accessed safely
[Refer to WebDoc-2011-June-01]
UFST Post-disaster Rapid TreeRisk Assessment Specifications
Level 1 tree risk assessment Only on that portion of the tree easily visible from groundEasily visible from safest and legal vantage pointsID obvious hazards per FEMA 325
Level 2 tree risk assessmentGround-based, visual inspection360o assessmentInspect crown, trunk, flare, exposed roots, conditionsID hazards that could impact people or property
•On public property•On private property
UFST Post-disaster Rapid TreeRisk Assessment Specifications
Type of risk analysis dataTree species or genusDiameterCumulative risk rating score
•Target•Size of part•Probability of failure
Risk mitigation recommendationFEMA eligibility recommendationSpatial location
What This Means for the UFSTTask Specialist
Only assessing storm-damaged treesFrom most recent stormAll others walk by
Change in assessment protocolStorm-damaged tree?Is it on public property or impacting it?Is it on/impacts improved property?Meets FEMA criteria for removal?
•>2” limb at break•>6” DBH tree
No more non-FEMA designationDecreased liability
John SlaterArkansas U&CF Partnership Coordinator
John.slater@arkansas.gov
Eric KuehlerTechnology Transfer Specialist
ekuehler@fs.fed.us
Urban Forestry SouthAthens, Georgia
www.UFST.orgwww.UrbanForestrySouth.org
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