HomeMy WebLinkAbout20161004 Ver 1_Additonal Information_20161116Charles E. Holden
141 Foxx Lane
Knotts Island, NC 27950
November 14, 2016
Division of Water Resources
943 Washington Square Mall
Washington, NC 27889
ATTN: Mr. Anthony Scarbraugh
Dear Sir:
RECEIVED/NCOENRIDWR
Nov 16 2016
Water Ouality Regional
Operations Section
Washington Regional Office
Thank you for working with me in correcting the placement of the retaining wall, from 2' away
from the tree line to 30' from the tree line which would be outside of the 404 wetlands.
I am enclosing corrections made on the part of the page 1 master layout of the bulkhead
installation . The retaining wall will be moved back outside of the 30' wetland. From the area
shown on the plans to be 2 feet from the tree line.
The correction will also effect other parts of the layout which I have corrected on the project
narrative sheet. This includes:
reducing on paragraph 4, line 2 from 60' to 54'
reducing on paragraph 4, line 4 from 690'.6" to 639.'6"
reducing on paragraph 4, line 5 from 64 cu. yds to 59 cu. yds.
reducing on paragraph 4, line 11 from 24" to 30'
Addition on paragraph 4, line 12-14, 45' of rip rap
Again, thank you very much for help in this matter. If you should have any additional questions
you may contact me at (757) 646-0404.
Sincerely,
)L C- 0'��
Charles E. Holden
Note: 3 copies forwarded to: 401 & Buffer Permitting Unit, 1617 Mail Service Center
Raleigh, NC 27699-1617
From: Charles and Carol Holden
141 Foxx lane
Knotts Island, NC 27950
A Project Narrative:
The primary purpose of this project is to stop the erosion from wind driven, north eastern, and
from due east that wash water against the bank. From the time this property was subdivided
around 1975 to the present time, erosion has taken away from 60' on the north end of the
property line to approximately 90" on the south end with lesser amounts in the middle. This
land is lost forever and now the bay is rising and the wind force which blows from the south
and builds up the water level then from the north to move it back out into Currituck Sound has
increased causing faster erosion. The concrete blocks which were placed along the water line
facing Knotts Bay cannot slow or stop the erosion and flooding is taking place when the blocks
were laid down in 1994 to now. The bay low water mark is approximately one foot higher now.
That leaves an average of 16" from the top of the block to the land level. This new bulkhead
will extend the height 12" which matches the existing bulkhead on the property next to us on
the north end.
The bulkhead would extend from the property line on the north to the property line on the
south, facing Knotts Bay. Starting on the north end, concrete blocks were placed against the
erosion escarpment at that time in 1994. A total of 155 blocks 15 1/2" high x 27" wide by 48"
long, were placed. Over the years, strong winds have washed over the blocks causing erosion.
Details of this is included on the drawings. The total length where blocks occur is 626'6". Total
fill material from the proposed bulkhead to the existing erosion escarpment located on the
landward side of the gravel behind the bulkhead is 226.8 cubic yards. The total surface is 4,943
square feet.
The bulkhead would be placed tight against the cement blocks which would add support.
Areas without these blocks, the bulkhead would be placed 12" from the erosion escarpment,
filled depth 2.5' which includes 54' along the Knotts Bay side to the area where wet lands start
and rip rap begins. Also, along both sides of the canal and along the end of the canal the total
length of this is 639'.6". Total fill material between the bulkhead and the erosion escarpment is
59 cubic yards. The total surface is 639,5' times 1 foot out times 2.5 feet fill equals 59 cubic
yards. In addition to the bulkhead we purpose to build a retaining wall along the tree line of
the marsh land on the south end of the property. Water builds up in the marsh and flows out
onto our grass land. In order to stop this, the retaining wall would be 12" above ground. This
area of land has been determined by the USACE visit on 7/28/16, the marsh area is USACE 404
wet land that extends 30' landward of the vegetation line where the retaining wall is proposed.
The wall will be constructed 30' from the vegetation line and would be a total of 264 lineal feet.
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