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HomeMy WebLinkAboutPA2023-0043_20230411_Bulkhead-Seawall Conditions Report Dated 04-10-23 P M A C O N S U L T I N G , I N C . CONSULTING STRUCTURAL ENGINEERS 28161 Casitas Ct. PH. (714) 717-7542 Laguna Niguel, CA 92677 e-mail: consulting@pma-bg.com April 10, 2023 Allie Schieble, AIA Oatman Architects, Inc. 412 31st Street Newport Beach, CA 92663 BULKHEAD CONDITIONS REPORT Camille and Joumana Rizko; Applicant 306 Via Lido Nord City of Newport Beach, County of Orange PMA Job #52823 Dear Ms. Schieble, PMA Consulting, Inc. is pleased to provide this report in accordance with Section 21.30.15.E.3 of City of Newport Beach Municipal Code. STATEMENT OF THE PREPARER’S QUALIFICATIONS Plamen Petrov, P.E., the preparer of this report, holds a Master of Science in Structural Engineering from University of Architecture, Structural Engineering & Geodesy of Sofia, Bulgaria, and is a Licensed Civil Engineer by the State of California Certificate No. C66947. For the last 23 years of his professional career, he has been actively involved in the design and entitlement of many Waterfront Developments such as custom homes, seawalls, piers, platforms, floating docks and marinas. A great number of Bulkhead Condition Reports prepared by him have been reviewed and accepted/approved by California Coastal Commission. All the above being said, Plamen Petrov, P.E. shall be considered a qualified preparer for the Bulkhead Conditions Report on this project. OBSERVATION A cursory observation of the existing seawall was conducted by a representative of our office on March 29, 2023. Observed was the visible/exposed portion of the waterfront face of the seawall. FINDINGS The seawall, which is a typical retaining wall consisting of continuous concrete footing and CMU or Concrete stem wall, was found in a good condition without noticeable evidence of distress. 1 CONCLUSION Based on our site observation, we conclude that the existing seawall, in conjunction with the return wall and concrete stair along South Property Line, is required to protect the principal structure on the lot and the adjacent homes, streets, utilities, etc. According to the preliminary plans for the proposed development on the lot, the existing seawall will be altered to accommodate a Basement/Boat Storage underneath the deck between the New House and the Seawall. As a part of the Basement/Boat Storage development, a New Seawall/Retaining Wall/Deep Footing will be built underneath the bay facing wall of the New House along two return walls, foundation and structural podium slabs at Boat Storage, as reflected on the Enclosed Preliminary Grading Plan C1, on Basement Plan of the Enclosed Sheet A4.0 and on Building Section 2A of the Enclosed Sheet A7.0. Once altered as reflected on Sheets C1, A4.0 & A7.0, no repair or replacement of the seawall shall be anticipated in the next 75. If during this period though, the seawall displays any sign of distress that requires immediate attention, it should be repaired or replaced at that time accordingly, without seaward encroachment from its current location. The above conclusion was prepared based on the existing conditions, proposed drawings, and within the inherent limitations of this study, in accordance with generally acceptable engineering principles and practices. We make no further warranty, either expressed or implied. PMA Consulting, Inc. appreciates the opportunity to work with you towards the successful completion of your project. Should you have any questions regarding this report, please give us a call. Respectfully submitted, Plamen Petrov, P.E. Principal Enclosure: Preliminary Grading Plan C1 Architectural Floor Plans A4.0 Architectural Sections A7.0 2 3 4 5