HomeMy WebLinkAboutPA2023-0034_20230206_Kane Engineering Final Approval Letter 3-29-20217400 Shoreline Drive
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March 29, 2021
Paul Bogseth PG, CEG, CHG
Principal Engineering Geologist
Hetherington Engineering, Inc.
5365 Avenida Encinas, Suite A
Carlsbad, California 92008
Subject: 1 Park Newport Drive Rockfall Slope Stabilization
Construction Final Approval Letter
Newport Beach, California
KANE Project No. KGT21-07, KGT20-43
City of Newport Beach (COMB) Permit No. X2020-2013
KANE GeoTech, Inc. (KANE GeoTech) was contracted by Hetherington Engineering, Inc., (Client)
to provide limited special inspection services during construction of the rock slope stabilization at
the project location. These services did not include continuous construction oversight. The rock
slope stabilization system is a Geobrugg TECCO high-strength steel wire mesh system (System).
The System is installed along Back Bay Drive at APN 440-132-52. The System is constructed near
the top of slope elevation 95-ft MSL and covers the surficial landslide scarps. Access Limited
Construction, Inc. (Access Limited) was the Contractor for the System at the project location.
Final Inspection Description
KANE GeoTech personnel inspected the completed System located at the project site on March
22, 2021. The final inspection was performed in accordance with the approved Construction
Drawings1 and Project Specifications2. Access Limited personnel were present during the final
inspection.
Final Inspection Summary
During the final inspection, KANE GeoTech personnel traversed the slope and observed the
System using an Unmanned Aerial System (UAS). KANE GeoTech personnel inspected all
components of the constructed System and obtained completion photos and videos. A total of 49
threaded bar and (8) wire rope ground anchors were installed. Appendix A includes an As-Built
aerial image of the final construction, and Appendix B includes an As-Built aerial image of the
ground anchor locations.
Final Inspection Results
At the time of the final inspection, KANE GeoTech personnel did not observe any deviations from
the approved Construction Drawings and Project Specifications.
1KANE GeoTech, Inc. (2021). 1 Park Newport, Surficial Rock Slope Stabilization, Construction Drawings, Newport
Beach, California. August 20, 2020. KGT20-43. Revised January 20, 2021.
2KANE GeoTech, Inc. (2020). 1 Park Newport, Surficial Rock Slope Stabilization, Construction Drawings, Newport
Beach, California. August 20, 2020. KGT20-43.
5 - Park Newport Final Approval Letter
1 Park Newport Drive Rockfall Slope Stabilization
Construction Final Approval Letter
Newport Beach, California
Page 2
Completed Inspections
Inspections performed by KANE GeoTech during construction included:
1.System Site Layout Limits and Ground Anchor Approval
2.Verification Anchor Testing Data Review
3.Production Ground Anchor Grout Mix Design Review and Approval
4.System Construction Final Inspection
Inspection Limitations
KANE GeoTech is not responsible for any construction performed without its oversight or beyond
the contracted Scope of Services.
Conclusion
We conclude that the System installed at the Project Site meets the requirements of the approved
Construction Drawings and Project Specifications. Therefore, it is KANE GeoTech's opinion that
the installation of the System is satisfactory and will perform as intended.
Disclaimer
Surficial landslides can be sporadic and unpredictable. Causes range from human construction
to environmental effects (weather, earthquakes, etc.). Because of the multiplicity of factors
affecting such events it is not, and cannot be, an exact science that guarantees the safety of
individuals and property. However, by the application of sound engineering principles to a
predictable range of parameters, the risk of injury and property loss can be substantially reduced
using properly designed protection measures in identified risk areas. Periodic inspection and
maintenance of such systems are necessary to ensure the desired protection level is not degraded
by impact damage, corrosion, or other factors.
Thank you for this opportunity to be of service. Please do not hesitate to contact us with any
questions you might have.
Sincerely,
KANE GeoTech, Inc.
William F. Kane, PhD, PG, PE
President and Principal Engineer
California Licensed Civil Engineer No. 55714
KANE GeoTech, Inc.
Appendix A
As-Built
Aerial Image
Rock Slope Stabilization System
Park Newport Rock Slope Stabilization As-Built Aerial Imagery
Appendix B
As-Built
Aerial Image
Ground Anchor Locations
PARK NEWPORT ROCKFALL SLOPE STABILIZATION AS-BUILT ANCHOR LAYOUT LOCATIONS
9
132456
7 8 10 11 12
1314
15161718192021
22 23 24
25
26
27
28
29303132
33
343536
37 38 39 40 41 42
43444546474849
W1
W2
W3
W4
W5
W6W7
W8
LEGEND
NO. 1-49 : PRODUCTION STEEL THREADED BAR ANCHOR
NO. W1 - W8: PRODUCTION STEEL WIRE ROPE ANCHOR