20061623 Ver 1_More Info Received_20061213

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Baldwin & Associates
Engineering, Land Surveying, & Planning
_ 1015 Conference Drive _
A ~ Greenville, NC 27858
252-756-1390
To: 401 Oversight/Express Review Permitting Unit
1650 Mail Service Center
Raleigh, NC 27699
Date: Job No:
12/11 /06 05-278
Attention:
Ian McMillan
Re:
Bridgewater North
We are sending you: ^ Attached ^ Under separate cover via
the following:
Drawin s Plans x Prints Sam les `-'S ecifications
g ^ ^ ^ P L._J P
Letter ^ Order ^ Other
5 11/30/06 Replies For Additional Information
5 12/11/06 Operations & Maintenance Agreements -Grass Swales
5 12/11 /06 Operations & Maintenance Agreements -Level Spreader
5 10/27/06 Copies of Plan - 100 Scale
5 10/27/06 Copies of Plan - 200 Scale
5 11/10/06 Drainage Plan p
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Transmitted as checked below:
~^For approval ^ Approved as noted ^ Resubmit copies for approval
^ For your use ^' Approved as submitted ^ Submit copies for distribution
!._^~As requested ^; Returned for corrections ^ Return corrected copies
For review ^ Other ___ ___- ____.
Remarks:
Signed: Derek Stetter/kdm Copy to:

B °
V~YI1~.11 and ASSOCIATES
A ENGINEERING, SURVEYING & PLANNING Michael W. Baldwin, PLS
~~ _ , ~ a~ J.S. Janowski, PE
Request For Additional Information Dated November 30, 2006
Request 1. -Please indicate the location of the protected buffers as overlays on the site
plan. Please be sure to break out the buffers as Zone 1 and Zone 2 clearly on the site plan.
Reply 1. - I have included 5 site plans at 200 scale and 5 site plane at 5 site plans at 100
scale that show the requested Zone 1 and Zone 2 buffers shown throughout the entire site.
I had originally just showed the buffers that were in the are that the permit is being
submitted for.
Request 2. -Please indicate the location of the grassed swale on your plan sheet. Please
provide a worksheet fro the grassed swale and a signed notarized Operations and
Maintenance agreement.
Reply 2. - I have included arrows on the site plan that show the flow direction of the
grassed swales, which is away from the wetlands. On the Typical Street section of the
submitted drawings, the swales can be seen from a side profile. This detail should assist
in understanding the stormwater system and how it will be laid out with regards to the
grassed swales. As shown on the previous drawings submitted, there will be no grassed
swales within the buffer zone. I have included an additional information sheet which I
have previously submitted explaining the stormwater process around the wetland crossing
area. I have also included a signed and notarized OM agreement for the grassed swales
and level spreaders. I realize that the level spreads OM agreement wasn't requested but I
felt it was better to send it then for it to be requested at a later time.
1015 Conference Drive ^ Greenville, North Carolina 27858 ^ 252-756-1390 ^ Fax: [phone]
Email: [e-mail]

November 10, 2006
DRAINAGE PLAN
After reviewing the proposed drainage plan for the Bridgewater North project,
Baldwin and Associates has changed the drainage plan for the area adjacent to
the wetlands crossing. We are now proposing that the four swales pitch away
from the wetlands crossing as well as raising the elevation of the road and
making the road pitch away from the wetlands. There will be no swales inside
the 50' buffer. There only will be sheet flow run off with in the 50' buffer. This
solution should neglect the need for any additional information concerning the
grassed swales (Additional Information Request #4). This revised drainage
solution was submitted and has been approved for a Stormwater permit for
Bridgewater North.

GRASSED SWAGES OPERATION AND MAINTENANCE AGREEMENT
The required maintenance activities of the property owner for permeable pavement installations
include the following:
1. Swales should be stabilized within 14 days of swale construction.
2. At least once annually, remove excess sediment, especially from the upstream edge, to
maintain original contours and grading.
3. At least once annually, repair any erosion and re-grade the swale to ensure that the run-
offflows evenly in a thin sheet through the swale.
4. At least once annually, inspect all vegetation and re-vegetate the Swale to maintain a
dense growth of vegetation.
5. Grassed swales should be mowed at least twice annually to a maximum height of six
inches.
I acknowledge and agree by my signature below that I am responsible for the performance of the
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or
prior to any changes to the system or responsible party.
Print name: ~al~G/''1" ~1v~dQ.v"~ ~
Title: (/V~,Dt~Vtq ~ -v~ [ti(+ew~, ~/'
Address: "loop ~Sc ~ £~,-~ ~ Su"l~ ! 1 S ~c.tt~t~. ,nlC~ 276 t ~
Phone: ~ tq.. ~2~ - °(3rvo
Signature: j2 -S' ~- o ~
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.
,~ ~ ~-
CJv
V~ 1r~v
a Notary Public for the State
County of ~,(~~1-tf,f/ , do hereby certify that
i~Scav~ personally appeared before me this`~day of
~U[o, and acknowledge the due execution of the forgoing wet [wetland]
requirements. Witness my hand and official seal,
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My commission expires 314 ~~jL
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LEVEL SPREADER OPERATION AND MAINTENANCE AGREEMENT
The level spreader is defined as an elongated, level threshold, designed to diffuse stormwater runoff.
Maintenance activities shall be performed as follows:
1. After construction and until vegetation has been established, level spreader(s) shall be inspected after
every rainfall. Thereafter, level spreader(s) shall be inspected at least every month and more
frequently during the fall season and after heavy rainfall events:
a. Accumulated sediment, leaves, and trash shall be removed, and repairs made if required.
b. Inspect level spreader(s) for evidence of scour, undercutting, settlement of the structure, and
concentrated flows downhill from the level spreader(s).
c. A level elevation shall be maintained across the entire flow-spreading structure at all times.
Repair or replace the level spreader if it is damaged.
d. Mow vegetative cover to a height of six (6) inches and prune plants if they cover over half of the
level spreader surface.
e. Repair eroded areas and replacelreplant dead or damaged vegetation.
2. The contractor should avoid the placement of any material on and prevent construction traffic across
the structure. If the measure is damaged by construction traffic, it shall be repaired immediately.
3. Inspect and repair the collection system (e.g., catch basins, pipes, swales, riprap) four (4) times a year
to maintain proper functioning.
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: ~~~~ /Q'V1.0~1i/S°wl
Title: ~ al.V-,ai,~ t '-'t~i ~/f~~~'Y'
Address: ~ ~~ 5 t K ~"-vv~ (cam ~-d(. ~y tCc l f ~ ~c t'-u ~, , ~.G- c~ ? 4 f
Phone: ~ 1 ~ " ~ ~ ~ ' ~ 3 G D
Signature:,
Date: y j2 - ~'--o ~
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.
I, VI-~~~- +~ -'~~ , a Notary Public for the State of ~ ~ ' ~~ ,
County of WC~I,~,~-~ , do hereby certify that ~%~/~ 7_ r1
personally appeared before me this ~~ day of ~~eCe v-~ ~e.r 'ZcxJ~o, and acknowledge the due
execution of the forgoing wet [wetland] detention basin maintenance requirements. Witness my hand and
official seal,
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9'~cou~'
SEAL
My commission expires o~~ f