RIP RAP SLOPE LTR Griffin
Engineering
Group, u.c
May 10, 2018
Mr. David Knowlton, P.E., City Engineer
City of Salem
120 Washington Street, 3`d Floor
Salem, MA 01970
Subject: Rip Rap Embankment
15 Nurse Way
Assessor's Map 9 Parcel 337
Dear Mr. Knowlton:
As requested by Mr. Kenneth Steadman, Principal of Bartlett & Steadman
Contractors, and Ms. Giovanna Z. Recinos, Salem Junior Engineer, this letter
addresses the stability of the rip-rap slope constructed along Nurse Way at the
subject location.
The subject slope varies in elevation from approximately four to eight feet and has
a 1:1 slope. A photograph of the slope is attached. The slope was constructed
by Bartlett & Steadman and is made up of blast rock from the subdivision project;
the largest rocks are approximately 24 to 30 inches in dimension. Voids have
been filled with smaller rock. Uphill of the slope is a relatively-level lawn area
across the southern half of the slope and a small (approximately 2'-tall landscape
wall and planting bed). These lawn and plant beds receive stormwater runoff
from approximately one-fourth of the building roof. No erosion of the plant bed or
lawn was apparent during our inspection this week. The foundation of the
adjacent residence is constructed on a blasted ledge surface.
Based on our visual inspection of the slope and its adjacent surfaces, it is our
opinion that the slope is stable and adequately supports the adjacent uses.
Should you have any comments or questions regarding our assessment, or
require additional information, please do not hesitate to contact the undersigned.
Sincerely,
Grriiffiin/Engineering Group, LLC
Robert H. Griffin, P.
Cc: K. Steadman
G. Z. Recinas
Phone 978-927-5111 Fax 978-927-5103 1 www.griffineng.com
495 Cabot Street I 2nd Floor I Beverly, MA 01915
Mr. David Knowlton, P.E., City Engineer Page 2
May 10, 2018
Re: 15 Nurse Way
Attachment. Photograph of Slope 5/8/18
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