20220148 Ver 1_More Info Received_20220411

Timothy P Donohue, PE
PROFESSIONAL ENGINEERING AND CONSULTING SERVICES

PO Box 403 Cashiers, North Carolina 28717 [phone] [e-mail]

April 9, 2022

Mr. Steve Conway
Southeastern Marine Contractors
6252 Towles Road
Wilmington, North Carolina 28409

Subject: Siting Evaluation – Bouchard Bulkhead
235 Florida Avenue
Carolina Beach, North Carolina
Job Number 21-162

Mr. Conway,

In accordance with your request, I am pleased to follow up with you request for clarification with
respect to how the proposed bulkhead was sited on this property during my design of the proposed
marine construction improvements.

The bulkhead was designed for a maximum height of 7’ and has an exposed height of approximately
4 to 5 feet where it is directly adjacent to the existing residence. The design considerations affecting
the proposed placement included:

➢ Proximity to the residence – the residence is very close to the existing wall, leaving minimal
space or ability to excavate behind the wall without disturbing the existing structure. It was
determined that a new wall should be placed in front of it, utilizing helical anchors as the
most practical method of anchoring the wall with minimal effect on the foundation.

➢ Soil Failure Plane – The wall was positioned as far as practical from the existing residence in
order to shift the potential failure influence zone of the wall-soil “block” away from the
residence and reduce the likelihood of foundation undermining.

In my professional opinion the wall should not be placed any closer to the existing residence than it
currently is. If I can be of further assistance, please do not hesitate to contact me.

Respectfully,

Timothy P Donohue, PE
Design Professional