HomeMy WebLinkAbout20 - Appeal of Denial of Special Neighborhood Trees Removal Request at 1317 and 1323 Ashford Lane - PowerPoint (Appellant)August 24, 2021
Item No. 20
132.3 Ashford Ln
Newport Beach
Tree Replacement Requested
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e. ' • The tree roots are limiting access to water and
sewer utilities
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City needed Repairs
• The curb and gutter, along with the sidewalk
will need to be repoured due to the lifting
sidewalk, for ADA compliance, utility access,
pooling of water, and to meet current city
standards
• Doing so will damage the trees and put them
in high risk of toppling and damaging private
property
Safety
Concerns
•There are current safety concerns due to limbs
falling during heavy rain or wind.
• The size of these trees and their limbs could
cause major property damage, public property
damage, and pose a risk to public safety and life.
New
Construction
?ROPOSED SITE PLAN
• Construction Reauirements
• Demolition of Current Single -Family Home
• Building New Single- Family Home
• Per Soils Report:
• New structural foundation elements should be founded in geotechnically reviewed, engineered fill.
• Grading is anticipated to include minor cuts/fills on the order of 0 -1 -feet +/- to obtain design grades and provide for
proper site drainage.
• For at -grade improvements, unsuitable near surface soils encountered in the upper 3 -feet below proposed pad
grades should be removed and recompacted as engineered fill. Remedial excavations should extend to a depth that
provides at least 12 -inches of compacted fill beneath proposed foundation elements.
• Non-critical hardscape and landscape areas, including the proposed driveway, patios, walkways, and stairs should be
over excavated and recompacted to a depth of 2 -feet below existing grades. Locally deeper removals may be required,
and actual limits and depth of over -excavation will be determined by AG during grading.
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ONE STORY BUILDING
1801 GLENWOOD LANE
UNL Sf URY BUILDING
1317 ASHFORD LANE
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Level 3 Tree
Assessment
Likelihood Matrix
Likelihood of
Failure
Likelihood of Impacting Target
Very Low
Low
Medium
I High
Imminent
Unlikely
Somewhat Likely
Likely
Very Likely
Probable
Unlikely
Unlikely
Somewhat Likely
Likely
Possible
nr�r��t�
omewhat Likely
Low
Low
Improbable
Unlikely
Unlikely
Unlikely
A. Unlikely
Risk Rating Matrix
Likelihood of
Failure & Impact
Conserwces of Failure
Negligible Iwll' r
Significant
Severe
Very Likely
Low 0derate
High
Extreme
Likely
Low Moderate
High
iModerate
High
Somewhat Likely
nr�r��t�
Unlikely Low Low
Low
Low
DISCUSSION A Resistograph test was conducted on each tree, utilizing an IML-RESI PD -400 which drilled sixteen inches into the tree at seven and eight locations,
respectively, around the circumference of each tree's root collar. At each location the drill was angled downward between twelve and thirty-two degrees to
detect the density of the wood at and below grade. An analysis of the readings shows that there are several small pockets of decay below grade, as well as small
cavities within each tree's trunk. When viewing the attached graphs, any section with a rapid drop indicates lack of resistance to the drill bit, which is indicative
of a pocket of decay, a crack, and/or a cavity. The bark and cambium layers of trees do not provide the same resistance as heartwood, therefore the readings on
the first couple of inches (read right to left) on each graph should not be considered too problematic. What we are looking for are signs of significant structural
defects which may be symptomatic of diminished wood strength.
• SUMMARY At this time, both trees should be considered a Moderate Risk. However, in light of the fact that there is already decay present within the base of
each tree's trunk, significant root loss would likely put these trees at increased risk of failure within the next few years, either by toppling or the continuing
advancement of decay. The loss of critical structural roots would inevitably push them both into the High Risk category. Prior to any disturbance to their root
zones, exploratory digging should be done to assess the extent of damage that the trees would have to withstand throughout the construction project. Please
do not hesitate to contact me with any questions you may have regarding my findings or recommendations. Thank you