SAVING EXISTING MATURE TREES DURING DEVELOPMENT Presented By: Urban - - PowerPoint PPT Presentation

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SAVING EXISTING MATURE TREES DURING DEVELOPMENT Presented By: Urban - - PowerPoint PPT Presentation

Feb 05, 2023 231 likes •606 views

SAVING EXISTING MATURE TREES DURING DEVELOPMENT Presented By: Urban Forestry Services, Inc., Jim Barborinas, 1 ISA Certified Arborist #PN-0135, ASCA Registered Consulting Arborist #356 HOW DO WE KEEP TREES PROTECTED? TREE PROTECTION 2 TO

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SAVING EXISTING MATURE TREES DURING DEVELOPMENT

Presented By: Urban Forestry Services, Inc., Jim Barborinas, ISA Certified Arborist #PN-0135, ASCA Registered Consulting Arborist #356

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HOW DO WE KEEP TREES PROTECTED?

TREE PROTECTION

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TO REMAIN HEALTHY AND STABLE

TREE PROTECTION

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WE SAVE TREES WITH…

  • Tree Protection Codes
  • Information
  • Design
  • Application of All

TREE PROTECTION 4

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QUALIFIED ARBORIST

 ISA Certified Arborist  PNW-ISA Tree Risk Assessor  ASCA Registered Consulting Arborist  ISA Board Certified Master Arborist  Experience

TREE PROTECTION 5

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1st Primary Task - TREE EVAL./DOCUMENTATION 6

ON SITE TREE EVALUATION

 DOCUMENT:

 Location  ID Number  Tree Species  Tree Diameter  Tree Condition:

Vigor & Structure

 Risk of Failure  Maintenance  Preservation Value

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SITE EVALUATION

 Note Valuable

Targets

 Clarify Present vs.

Future Exposure

 Document

Understory Vegetation

 Existing Soils

1st Primary Task - TREE EVAL./DOCUMENTATION

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1st Primary Task - TREE EVAL./DOCUMENTATION 8

ENGINEERING SURVEY OF SIGNIFICANT TREES

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ID TAG AND LOCATE TREES

TREE PROTECTION 9

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1st Primary Task - TREE EVAL./DOCUMENTATION 10

SPECIES RETENTION QUALITIES

DOUGLAS FIR BEST

TOUGH FAST GROWING. TOLERATES ROOT DISTURBANCE.

WESTERN RED CEDAR GOOD

SHADE AND WET TOLERANT, GOOD SCREENING TREE.

BIGLEAF MAPLE GOOD

FAST GROWING AND TOLERATES ROOT DISTURBANCE.

WESTERN HEMLOCK FAIR TO POOR

SHADE TOLERANT BUT DECLINES FROM ROOT DISTURBANCE.

RED ALDER POOR

POOR ROOTS AND STRUCTURE EVEN WHEN HEALTHY

COTTONWOOD POOR

FAST GROWING, HUGE TREE, WITH LIMB DROP AND INVASIVE ROOTS.

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1st Primary Task - TREE EVAL./DOCUMENTATION 11

TREE SIZE AND GROUP

 BIG TREES ARE GREAT

BUT HARDER TO SAVE.

 SMALLER TREES ARE

MORE VIGOROUS-CAN GROW OVER TIME.

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1st Primary Task - TREE EVAL./DOCUMENTATION 12

TREE CONDITION

 VIGOR  STRUCTURE

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1st Primary Task - TREE EVAL./DOCUMENTATION 13

RISK OF FAILURE

MUST CONSIDER LOCATION AND TARGET

HAZARD TREES MUST TARGET SOMETHING OF VALUE

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1st Primary Task - TREE EVAL./DOCUMENTATION 14

RISK OF FAILURE

MUST CONSIDER SOILS

CRITICAL ROOT ZONE (CRZ) REQUIREMENTS

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MAINTENANCE -

To Improve Health, Reduce Risk

 Pruning  Cabling  Watering  Fertilizer  Root

Treatment

 Air Spade

TREE PROTECTION 15

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PRESERVATION VALUE

TREE PROTECTION 16

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1st Primary Task - TREE EVAL./DOCUMENTATION 17  Scope of Work  Site, Soils, and

Vegetation Descriptions

 Tree Code  Tree Evaluation Results  Site Map with Tree

Information

 Tree Protection

Guidelines or Specifications

DOCUMENTATION

PRELIMINARY TREE REPORT

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1st Primary Task - TREE EVAL./DOCUMENTATION 18

TREE EVALUATION MATRIX

Tree Tag # Species Common/ Scientific dbh (in.) CRZ Perim eter/In terior Vigor Structure Risk of Failure Maintenance Recommendation Preser- vation Value Comments/ Defects

62 Black Locust (Robinia pseudoacacia) 12 6/12 Fair Fair Moderate- High Retain with concerns Moderate Healthy & drought resistant but deadwood and thorny suckers can be nuisance. 63 Copper Beach, Fagus sylvatica purpurea 32 16/32 Excellent Good Low Crown Clean Special Outstanding long living speciman with character trunk form. 64 Red Alder, Alnus rubra 15 8/15 Poor Poor High Remove Low to None Poor tree with poor species characteristics subject to early failure.

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SITE MAP WITH TREE INFORMATION

1st Primary Task - TREE EVAL./DOCUMENTATION 19

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1st Primary Task - TREE EVAL./DOCUMENTATION 20

CRITICAL ROOT ZONES (CRZ)

CRZ = 1 FOOT RADIUS FOR EVERY 1 INCH DIAMETER AT 4.5 FEET ABOVE GRADE.

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WHY DRIPLINES DO NOT WORK FOR CRZ

1st Primary Task - TREE EVAL./DOCUMENTATION 21

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1st Primary Task - TREE EVAL./DOCUMENTATION 22

CRITICAL ROOTZONE IN DETAIL

Go to www.urbanforestryservices for More Information on CRZ

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2nd Primary Task - DESIGN DEV./ TREE PROT. PLAN 23

COMBINE INFORMATION AND DESIGN

Provide Information to the Design Team

Involve the Arborist

Meet City Tree Preservation or Mitigation Codes

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2nd Primary Task - DESIGN DEV./ TREE PROT. PLAN 24

DESIGN REVIEW

 Arborist Should

Review Plans

 Consider

Alternatives to Minimize Impacts to Tree

 Consider all

Impacts including Landscaping

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2nd Primary Task - DESIGN DEV./ TREE PROT. PLAN 25

SUBMIT TREE PROTECTION PLAN

 Include in all

Site Pans

 Illustrate Tree

Protection Fence Locations

 Tree Protection

Guidelines or Specifications

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3rd Primary Task - IMPLEMENTATION 26

MARK TREES

 Paint Mark Trees to Remove  Paint Both Top and Base  Clearly Mark Save Trees

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3rd Primary Task - IMPLEMENTATION 27

APPROVE TREE PROTECTION FENCE AND SIGNS

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PROTECT TREES FIRST

3rd Primary Task - IMPLEMENTATION 28

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3rd Primary Task - IMPLEMENTATION 29

COMPLETE TREE MAINTENANCE

 PRUNING  ROOT TREATMENT  MULCHING  FERTILIZATION  WATERING

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3rd Primary Task - IMPLEMENTATION 30

CONTACT ARBORIST FOR WORK INSIDE CRZ

 Monitor, Approve, Root Prune and

Recommend Alternatives

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BORING TO AVOID ROOT DAMAGE

3rd Primary Task - IMPLEMENTATION 31

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3rd Primary Task - IMPLEMENTATION 32

MONITOR TREE PROTECTION FOR COMPLIANCE

 Watch for Fence Creep

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3rd Primary Task - IMPLEMENTATION 33

POST CONSTRUCTION MONITORING

Watch for Changing Tree and Site Conditions

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SAVING TREES SUMMARY ACTION ITEMS

 Follow Tree Codes  Evaluate Trees Early  Share Documented Tree Information and

Work with Design Team

 Review and Monitor Work near Trees

TREE PROTECTION 34

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TREE PROTECTION 35

Thank you!

Created June 2010 Presented By: Urban Forestry Services, Inc., Jim Barborinas, ISA Certified Arborist #PN-0135, ASCA Registered Consulting Arborist #356

SAVING EXISTING MATURE TREES DURING DEVELOPMENT