20100684 Ver 1_Stormwater Info_20110307

@McGM
A S S O C I A T E S
March 2, 2011
Mr. Joseph Gyamfi, PE
North Carolina Department of
Environment and Natural Resources
Division of Water Quality
401 /Express Permitting Unit
2321 Crabtree Boulevard
Raleigh, North Carolina 27604
DMAR v 7 2011
DENK . YvAi rti QU&ITY
WETLAvDS AND STORMATER BRANCH
RE: Stormwater Review
Foothills Commerce Center - Phase One
Cleveland County, North Carolina
Dear Mr. Gyamfi:
We are in receipt of a comment letter dated February 9, 2011 regarding the subject
project from Ian McMillan. We have addressed the comments in the following manner and in
the order in the letter:
a. We have calculated the number of herbaceous plants required for each Wet Detention
Basin based on the criteria in the BMP Manual and showed a distribution of three
different species for each half of each basin shelf.
b. The planting box on Sheet C-508 has been revised to show only herbaceous
vegetation and does not provide for any trees or woody shrubs.
c. The plantings are to be at approximately 24" centers as required.
d. We selected plantings from the approved choices in Chapter 9 (cattails were removed
from the list).
e. The local nursery supplier for the native plant species is called out on Sheet C-509.
Two copies of Sheet C-508 and C-509 are included with this submittal for your review
and approval.
E n g i n e e r i n g • P l a n n i n g F i n a n c e
McGill Associates, P.A. • P.O. Box 2259, Asheville, NC 28802 55 Broad Street, Asheville, NC 28801
828-252-0575 • Fax: [phone]
Mr. Joseph Gyamfi, PE
March 2, 2011
Page 2 of 2
Please contact Dale Pennell, PE, or me if you have any questions or concerns.
Sincerely,
McGILL ASSOCIATES, P.A.
4kxAl?
CLAYTON R. MORRELL
Senior Engineering Technician
Enclosures
cc: Mr. Rick Howell, City of Shelby (w/ enclosures)
Mr. Brad Cornwell, City of Shelby (w/ enclosures)
Mr. Dale Pennell, PE, McGill Associates, P.A.
P:\2009\09.00116\Letters\j g02mar l l .docx
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j I I I f I I OUTLET PIPE " \ B®TTOM PLgATE bYE tTE WELDED TO CMP ~ Iris virginica 91ue flag Iris 165 161 ~ #6 Multipot ~ Shallow ware
1 POND 1:24 ~ BOTTOM PLATE t I 1 I ~ I I I I I' PONA ; 24" 6~ 6° i , I I A; 2 ~ Pontededa April ~-July
I I ; \ 6 CAP N1TH HOLE ~ cordate Peckerelweed 1S5 161 36(# #6 Multipot ~ Shallow Wate
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ti r / / I A' p V h I I ~ I ~I e 12". n stph~liti~a lobelia summer ® w ~ dee cells • : ? w ~ ~ g
i I i I~ "~a. ae ~ e I ~ PROPOSED 4000 PSI CQNGRETE
1 ~ ~ j I ' / I 1 ! ~ ~ I -------------POND EOTTOM--- Hibiscus Scarletrose Plug TrayCepls ~ u,i C7 ®C? ~ ~ o 7 l6S 161 36 l2" dia s A'° Spring Shallow tend m ~ ~ 0 ~ ~ W o
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~ 1 1 ~ ~ t I j I ~ ~ / f
I I r ~ ( I ! ~ o Note
I I i' f` I $
I 1 / .I I I ~ ~ } I ~ Plant Supplier is Stoned Poent Nurseryi and Farms, NCDA IJC. #SS91 m. ...~n.., w..,,..,.. .
l I ! ~ / I / _ 0 T i ~ ~ ~ ~ i I / Control of invasive weeds, animal end vandal damage, mulching, watering, and mesh ortube protection replacement,
I i ~ ~ 1 ~2„ shall,be im~lernented o the extent needed to ensure plant suwival ,
I 3 l I ' i R~ TYPE LUG MOUNTER N TEE I ~ I 6 SCE P O °1 I r ( All plantings shall be warranted for two years. At tl~e end of the first year and again at the end ofthetwo-year
~ t ~ ~ ,warranty.period, all.plants that do.not survive must, be repiaced,~ith thesame plantings . . . . .
~ 3' g ~ 1 4 ~ r ( i ~ TEMPORARY POOL
I m 3.5 ORIFICE i NOTE;
~ i I SEE DETAIL, I I ( ! ' I ~ , i " ~ 1 I ~ I TRASH RACK ~ i 6 TEE STUBBED INTO RISER 1. KEY NUMBERS SHOW LOCATION OF VEGETATIVE COVER. FOR SPACING OF PLANTS, SEE CHART ABOVE>
~ SHEET -509) ~ ~ ~ P l i (SEE DETAIL SHEET Cp503y i Q. ' ~ \ 1 11 I ~ ~ ~
~ 42 3E I I I 42'° 36" DIA° CMP
i I ~ PERMANENT POOL r i I ~ • ~ r ~ I ~ ~ MIN
® I ! ` 36 ALU IZED CMP I \ JD ~ ~ I ~ ~ I ~ 7 2
~ . I I ~ I RISER PIPE OUTLET N l ~ " „
i I \ KITH 42 x42 ` ` \ ~ BOTTOM PLATE
\ ~ \ BC rn > ~ ~ ~ ALUMINIZED CMP ~ 80TTOM PLATE........
a 1 ~ ~ ~ OUTLET PIPE ~ BOTTOM PLATE A~ ATE WELDED TO CMP 1. INSTALL EROSION AND SEDIMENT CONTROL MEASURES AS INDICATED ON PLANS.
~ ~ , t POND 3:18" » ~ 6" ~ $05.74 ~ t 6 ~ "
1 6 CAP KITH HOLE ; I 'T` ~ 1 ~ DRILLER FOR ORIFICE PROCEED WITH GRADING, CLEARING AND GRUBBING, SEED AND PLACE EROSION CONTROL MATTING ON ALL CUT
AND FILL SLOPES THAT ARE NOT ROCK IMMEDIATELY UPON COMPLETION OF SLOPE STABILISATION.
' ` ~ m j p } ~ I ~
i ~ ~ a: < 1 i 1" INSTALL ~"-90°' BENTONITE CLAY LINER COMPACTED TO 957 STANDARD PROCTOR,
I ~ 0 1 I ~ i o " 4° INSTALL OUTLET DEVICES AND LANDSCAPING PER THE PLANS,
, ? , ~ 4 24 1 d- v ~ I , A• a a 4
1 a C 1" , 5. WET DETENTION BASINS SHALL BE PROTECTED FROM SEDIMENT UNTIL TFIE ENTIRE DRAINAGE AREA IS STABILIZED,
g buo.~)v IF PROPOSED 4000 PSI CONCRETE PROPOSED 4000 PSI CONCRETE
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