SW7070527_CURRENT PERMIT_20080506

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW
DOC TYPE
CURRENT PERMIT / P�QYHA
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
210�l�
YYYYM M D D

)5, 6,
AVOLIS ENGINEERING, P.A.
—L� P.O. Box 15564 • New Bern, North Carolina 28561 • (252) 633-o068
April 30, 2008
MAY - 0 2008
Mr. At I -lodge
Regional Supervisor
Surface Water Protection Section
Washington Regional Office
NC Division of Water Quality
943 Washington Square Mall
Washington, NC 27889
RE: Engineer's Stormwater Certification - SW7070527
Stillwater Harbor - A Planned Unit Development
Craven County. North Carolina
AE Project No. 06033
Dear AL
LJNIVAR0
Enclosed please find the Engineer's Stormwater Certification for the above -referenced project.
Should you have any questions relating to this matter or need any additional information or
assistance, please do not hesitate to call.
Sincerely,
r�Avolis, P.E.
President

a
State-Stormwater Management Systems
Permit No. SW7070527
Stillwater Investment Group, LLC
High Density Project MAY — 5 2008
Designer's Certification V Rr
I, John Kevin Avolis, P.E. as a duly
Re a Professional Engineer in the State of North Carolina, having been authorized to observe
enodicall eekly/full time)
the cons ruction of the project,
Stillwater Harbor - A Planned Unit Development (Project)
for Stillwater Investment Group, LLC (Project Owner)
hereby state that to the best of my abilities, due care and diligence was used in the observation of the project
construction such that the construction was observed to be..�gijj,Withi0.substantial compliance and intent of the
SEAL �pC�
o t r
Date ',, �>Itlu� ��%�['FN1t.cc,�z.� I
N O O I
Certification Requirements: ////I/] '�`` J
1. The drainage area to the system contains approximately the permitted acreage.
�2. The drainage area to the system contains no more than the permitted amount of built -upon area.
Q3. All the built -upon area associated with the project is graded such that the runoff drains to the
system.
4.
All roof drains are located such that the runoff is directed into the system..- ZNn, u , n
At67- L eT- ?4Ltom ')✓
d�il_5.
The outlet/bypass structure elevations are per the approved plan.
:�_1_6.
The outlet structure is located per the approved plans.
�7.
Trash rack is provided on the outlet/bypass structure.
�8.
All slopes are grassed with permanent vegetation.
�7 9.
Vegetated slopes are no steeper than 3:1.
10.
The inlets are located per the approved plans and do not cause short-circuiting of the system.
11.
The permitted amounts of surface area and/or volume have been provided.
<4F 12.
Required drawdown devices are correctly sized per the approved plans.
46'> 13.
All required design depths are provided.
<* 14.
All required parts of the system are provided, such as a vegetated shelf, and a forebay.
.c/15.
The required system dimensions are provided per the approved plans.
H

NOV - 5 2007
Filter Strip, Restored Riparian Buffer and Level Spreader
Inspection and Maintenance Agreement DWQ-WAR0
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Important maintenance procedures:
— Immediately after the filter strip is established, any newly planted vegetation
will be watered twice weekly if needed until the plants become established
(commonly six weeks).
— Once a year, the filter strip will be reseeded to maintain a dense growth of
vegetation
— Stable groundcover will be maintained in the drainage area to reduce the
sediment load to the vegetation.
— Two to three times a year, grass filter strips will be mowed and the clippings
harvested to promote the growth of thick vegetation with optimum pollutant
removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and
may be allowed to grow as tall as 12 inches depending on aesthetic requirements
(NIPC, 1993). Forested filter strips do not require this type of maintenance.
— Once a year, the soil will be aerated if necessary.
— Once a year, soil pH will be tested and lime will be added if necessary.
After the filter strip is established, it will be inspected quarterly and within 24 hours
after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County).
Records of inspection and maintenance will be kept in a known set location and will be
available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblem:
How I will remediate theproblem:
The entire filter strip
Trash/debris is present.
Remove the trash/debris.
system
The flow splitter device
The flow splitter device is
Unclog the conveyance and dispose
(if applicable)
clogged.
of any sediment off -site.
The flow splitter device is
Make any necessary repairs or
damaged.
replace if damage is too large for
repair.

BMP element:
Potentialproblem:
How 1 will remediate theproblem:
The swale and the level
The Swale is clogged with
Remove the sediment and dispose
lip
sediment.
of it off -site.
The level lip is cracked,
Repair or replace lip.
settled, undercut, eroded or
otherwise damaged.
There is erosion around the
Regrade the soil to create a berm
end of the level spreader that
that is higher than the level lip, and
shows stormwater has
then plant a ground cover and
bypassed it.
water until it is established. Provide
lime and a one-time fertilizer
application.
Trees or shrubs have begun
Remove them.
to grow on the swale or just
downslo e of the level lip.
The bypass channel
Areas of bare soil and/or
Regrade the soil if necessary to
erosive gullies have formed.
remove the gully, and then
reestablish proper erosion control.
Turf reinforcement is
Study the site to see if a larger
damaged or ripap is rolling
bypass channel is needed (enlarge if
downhill.
necessary). After this, reestablish
the erosion control material.
The filter strip
Grass is too short or too long
Maintain grass at a height of
f applicable).
approximately three to six inches.
Areas of bare soil and/or
Regrade the soil if necessary to
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Sediment is building up on
Remove the sediment and
the filter strip.
restabilize the soil with vegetation if
necessary. Provide lime and a one-
time fertilizer application.
Plants are desiccated.
Provide additional irrigation and
fertilizer as needed.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application.
Nuisance vegetation is
Remove vegetation by hand'if
choking out desirable species.
possible. If pesticide is used, do not
allow it to get into the receiving
water.
The receiving water
Erosion or other signs of
Contact the NC Division of Water
damage have occurred at the
Quality local Regional Office, or the
outlet.
401 Oversight Unit at 919-733-1786.

I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. 1 agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Print name:T.A. BAYLISS IV
Title: M EMBER/MANAGER
Address:2859 TRENT ROAD, NEW BERN, NC 28562
Date:
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
1, Beth Simmons , a Notary Public for the State of
North Carolina , County of Craven , do hereby certify that
T.A. Bayliss, IV personally appeared before me this 5th
day of November , 2007 , and acknowledge the due execution of the
forgoing wet detention basin maintenance requirements. Witness my hand and official
seal,
NOTARY
S PUBLIC
y'oq&"EN"114111tCO``\`o
SEAL
My commission expires April 22, 2009