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Healthy Trees- Sustainable Landscape ASLA National Conference 2008 - page 16 / 51

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Root Investigative Study Report Objectives: Determine growth characteristics of representative tree species in Loudoun County, VA by means of investigative digging in representative species, soils and hydrological regime. The results of this Study are used to determine strategies in design and construction as well as prescribe appropriate protection measures & stress reduction therapies. Beginning Supersonic Airtool (SSAT) Investigation within proposed roadway selecting representative tree species: White Oak, Red Oak, Hickory, Ash.

Note roots are very near surface. This is not characteristic of white oaks in Montgomery County MD Piedmont in loamy clay mica rich soils. Deeper restrictive layers are assumed to be the reason. Refer to soils boring reports for verification.

Technical Findings

23” WHITE OAK (white paint for photo)

TOTAL ROOT LENGTH (est.) = 50’

DIAM. AT DIST. FROM TRUNK

3” @ 10’

1” @  20’

.5- .75” @ 30’

.25-.5” @ 40’

END AT EST 50’

Concept Design for Proposed Corporate Financial Center

National Rural Utilities, Dulles Town Center, VA

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