20110339 Ver 2_More Info Received_20110421

DAVID MILLER, PE
1000 BEARCAT WAY ; SUITE 108
MORRISVILLE, NC 27560
[phone] (M)
[phone] (F)
Mr. and Mrs. Ken and Kendal Fiorini
7309 Spy Glass Way
Raleigh, NC 27615
E-mailed: [e-mail]
Re.: Engineering Services - Geotechnical Testing and Analysis
PRELIMINARY REPORT
7309 Spy Glass Way
Raleigh, NC 27615
Project No.: l l DDM-0421 C
To Whom It May Concern /Inspections Dept.:
April 21, 2011
The undersigned and the undersigned's representative have previously visited the
site and performed geotechnical borings, field leveling and observations. Based on the
observations portions of the rear slope have erosion and some instability. The instability
was observed as sloughing and ground movement most likely the cause of erosion over
time. The undulating rock surface and the rear slope are prone to erosion.
Due to the known structural distress to the main structure, observed erosion and
localized instabilities the rear slope should be buttressed to structurally stabilize the land
mass to provide long term structural stability of the main structure. A segmental wall
with washed stone and geogrid support is anticipated at the toe of the slope on a footing
embedded to the rock or firm subgrade to provide the support and protection needed. The
wall should begin at the toe of slope approximately 30 to 40 feet from the structural
elements.
Sincerely,
David Miller, PE
DEM/11 DDM-0421 C