Parcels

7,837 Trees on City owned Parcels

In the fall of 2017, the Bartlett Inventory Solutions ( BIS) Team from Bartlett Tree Experts conducted an inventory of trees on City-owned Parcels in the City of Aiken, SC. We identified 7,837 trees, including 3 groupings, which included 204 species. The attributes that we collected include tree latitude and longitude, size, age and condition class, and a visual assessment of tree structure, health, and vigor.

Tree Risk Assessments and Mitigation

Perform the recommended tree risk mitigation activities for the 244 trees (3%) which we found defects or concerns that prompted the need to use the International Society of Arboriculture’ s (ISA) risk matrices in the field. Risk mitigation activities will comply with current ANSI A300 standard practices.

Tree Risk Assessments and Mitigation

Perform the recommended tree risk mitigation activities for the 244 trees ( 3%) which we found defects or concerns that prompted the need to use the International Society of

Arboriculture’ s ( ISA) risk matrices in the field. Risk mitigation activities will comply with current ANSI A300 standard practices.

Soil Sampling

Taking soil samples throughout planting beds and actively managed areas. Soil analysis provides information on the presence of soil nutrients, pH, organic matter, and cation exchange capacity.

Bulk Density Sampling

Taking bulk density samples throughout planting beds and actively managed areas to determine the amount of soil compaction.

Soil Rx®

Apply Bartlett’ s Soil Rx® program to 10 trees (< 1%) to correct nutrient deficiencies and optimize soil conditions for the designated trees.

Root Invigoration™

Perform Bartlett’ s patented Root Invigoration™ on 447 trees (6%) to improve aeration and promote more efficient root growth, especially for high- value trees in disturbed areas.

Mulching

Wherever possible, apply 2-4 inches of mulch within the root zone to help moderate soil temperatures, reduce soil moisture loss, reduce soil compaction, provide nutrients, improve soil structure, and keep mowers and string trimmers away from tree trunks. The best mulch materials are wood chips, bark nuggets, composted leaves, or pine needles. To avoid potential disease problems, mulch should not be placed directly against the trunk.

Root Collar Excavations

Perform root collar excavations to 955 trees ( 12%) to lower risk of damaging conditions such as girdling roots, basal cankers, masking of root decay and lower-stem decay, and predisposing trees to various insect and disease pests.

Plant Health Care (PHC)

Implement Bartlett’ s PHC program to monitor pests and diseases on the subject trees.

Treatments are therapeutic and preventive, and treatment timing is based on pest life cycle.

Pruning

Prune 1,852 trees ( 24%) for safety, health, structure, and appearance. Pruning will comply with current ANSI A300 standard practices for pruning.

Structural Support

There are structural support system recommendations for 76 trees ( 1%) to reduce risk of branch or whole tree failure. All structural support systems will comply with current ANSI A300 standard practices for supplemental support systems.

Lightning Protection

There are lightning protection system recommendations for 6 trees (< 1%) to try and intercept lightning strikes and conduct them to the ground. All Lightning protection systems will comply with current ANSI A300 standard practices for lightning protection systems.

Removals

Remove 418 trees (5%) due to condition or because of their location in relation to other trees to try and prevent competition or damage to infrastructure.

Tree Risk Advanced Assessments ( Level 3)

Provide tree risk advanced assessments for 31 trees (< 1%) to evaluate the impact of wood decay that shows potential for failure.

Vine Removal

Remove vines from 557 trees ( 7%) to try and prevent them from hiding defects.

Ecosystem Services

Ecosystem services were estimated with results indicating that the net annual benefits for all trees inventoried was $41,528, and the net annual benefit per tree average was $5.31.

Estimated Tree Asset Value = ( Average Per Square Inch Nursery Price* Size)* Species Factor* Condition Factor* Location Factor

Tree ID Common Name Genus Species DBH Tree Asset Value

11590 Cedar- Deodar Cedrus deodara 29.3, 47.2, 30.9 $ 70,126.84

11552 Oak-Live Quercus virginiana 56.3, 44.8 $ 66,793.43

11760 Oak-Live Quercus virginiana 49.1, 51.3 $ 66,717.04

12598 Oak-Live Quercus virginiana 73.3 $ 66,186.63

12814 Oak- Live Quercus virginiana 28.2, 26.2, 25.8, 18.9 $ 59,343.44

17643 Oak- Live Quercus virginiana 63.4 $ 59,162.67

17603 Oak- Live Quercus virginiana 63.2 $ 59,000.35

12792 Oak-Live Quercus virginiana 59.7 $ 56,028.74

12664 Oak-Live Quercus virginiana 57.9 $ 54,404.02

11699 Oak-Live Quercus virginiana 42.0, 28.2, 27.3 $ 52,649.00

The i-Tree Eco Version 6 application was used to analyze the ecosystem benefits provided by the trees inventoried on the City of Aiken City-owned Parcels. The overall results are provided below:

Tree Canopy Cover: 101.7 acres

Net Annual Benefits of All Trees: $41,528

Net Annual Benefits Per Tree: $5.31

Tree Species Native to North America: 85%

Tree Species Native to South Carolina: 82%

Exotic Tree Species: 15%

Invasive Species for South Carolina: 1.5%

Tree Characteristics of the Urban Forest

The urban forest of Aiken, SC City-owned Parcels Eco 2018 has 7,814 trees with a tree cover of 101.7 acres. The three most common species are Loblolly pine (25.4 percent), Water oak (13.5 percent), and Live oak (7.4 percent).