Construction Damage & Prevention Construction damage is one of the greatest causes of tree death and decline in urban areas. Presented by: Courtney Blevins,

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Presentation transcript:

Construction Damage & Prevention Construction damage is one of the greatest causes of tree death and decline in urban areas. Presented by: Courtney Blevins, Fort Worth Region

Damage & Effects Roots Key to everything! Extend times tree height from base. Shallow - 95% in top 3 of soil; 90% in top 1 Root volume reduced with reduction of soil pore space. Reduced root volume equals branch dieback in following years.

Root Spread

Soil Compaction Effected by soil type or texture. Loss of pore space = loss of oxygen = loss of roots = loss of branches or tree. Results from any equipment or foot traffic. Protect Critical Root Zone (CRZ) with fencing, mulch, water, etc.

Above Ground Protect trunks Assure adequate height clearance for branches (use an arborist) No storage, parking, etc. within CRZ. Avoid cut/fill within CRZ Avoid damaging conditions from grade changes (excess water, etc.)

Below Ground Trenching beyond CRZ only. Tunnel under roots within CRZ. Assure clean cuts of large, severed roots. Keep exposed roots moist until covered.

Grade Changes of fill kills roots. Fine feeder roots are near the soil surface. Any cut removes roots. Drainage patterns change. Use retaining walls if unavoidable.

Prevention Plan Before You Build Tree map. - Species, Size, Location, Health? Site plan. - Structures - Utilities - Roads - Grading

ID Trees to be Preserved Use a professional tree person. Trees to remove include: - Those that cant be planned around. - Undesirable species. - Those unlikely to survive the construction process. (These may be the larger trees on site)

ID Trees to be Preserved, cont. Modify site plan to accommodate trees to be preserved. - Written construction specs are needed including: + Protection fences for CRZ + Travel lanes beyond CRZ + Parking areas beyond CRZ + Storage areas beyond CRZ + Grade changes beyond CRZ - Supervised by tree pro on site.

Post Construction Activities Re-asses condition of trees. Determine maintenance needs. - Automatic sprinkling systems? - Pruning damaged limbs (arborist). - Mulch, mulch, mulch; aka NO GRASS - Extra water? - Fertilization?