20090940 Ver 1_Site Plan_20110826

'¦WSP m SELLS
/
Transportation & Infrastructure
August 22, 2011
NCDENR
Division of Water Quality - 401 Oversight/Express Unit
2321 Crabtree Blvd., Suite 250
Raleigh, North Carolina 27604
919-715-3425
Attention: Ms. Annette Lucas
Reference: Permit No. 2009-0940
Revised Storm Water Management Plan
Dan River Combined Cycle Project
Eden, Rockingham County, NC
Dear Ms. Lucas:
NORTH CAROLINA 128 Overhill Drive
CONNECTICUT Suite 105
MASSACHUSETTS Mooresville, NC 281 17
NEW HAMPSHIRE Tel: [phone]
NEW JERSEY Fax: [phone]
NEW YORK www.wspsells.com
PENNSYLVANIA
SOUTH CAROLINA
VIRGINIA
OENR - NA TER uUACf1 Y
nANOSANp STORMWATER BgWGti
On behalf of Duke Energy, please find attached two copies of the revised sheets C-7.0, C-7.1, and
C-7.2. The plans were revised based on comments dated July 28, 2011. The revisions include:
Sheet C-7.0
We revised the scale on this sheet from 1"=200' to 1"=100'. This sheet also includes proposed
one-foot contours of the BMP's, delineated drainage areas, boundaries of the permanent drainage
easements, and storm water drainage systems.
Sheet C-7.1
We corrected the mislabeled permanent pool elevation to read 526.5 instead of 526.0.
Sheet C-7.2
We removed the references to Bioretention Area.
If you have any questions or require additional information, please contact us.
Respectfully submitted,
WSP SELLS
-C? -4
Jonathan A. Carter, P.E.
Project Manager
C-E-,",
cc: Mr. Mark McGary, Duke Energy
Mr. Michael Shekmer, P.E., Shaw Fossil Power
I
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i r \ 530 I , , t ~ ; 3. EXCAVATED SIDE SLOPES TO BE STABILIZED WITH GRASS COVER IN ~ ~ ACCORDANCE WITH SEEDING SPECIFICATIONS FROM EROSION &
is E ~ , ~ , f \ \ ; / , I 1 `l i Y ~ " SEDIMENT CONTROL PLAN.
f 528 t ~ ! ~ I t" ! ; v. t ~ ~ A ~ ~ ~ ~ . ~ ~ ' ~ r r \ V ~ f ~ r~
~ I d S ~ ~ t t ~ i j I 4. FINAL DAM EMBANKMENT SLOPES TO BE TRACKED AND STABILIZED ~ WITH GRASS COVER IN ACCORDANCE WITH SEEDING SPECIFICATIONS
r` FROM EROSION & SEDIMENT CONTROL PLAN. ~
/ ~ \ r ~ \ \ \ N~ ~ PE~MANENT ~ - ~ ~ F-, ~ ~ 1` . / v I 526 ~ ` v • DI~AI GE < ~ ' i ~ t` I 5. REINFORCED CONCRETE RISER STRUCTURE TO BE 36" DIAMETER. N
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• ~ ~ ~ ~ 524 \ v ~ v v .EASEM T + r f i i ~ ~ 6. ANTI-SEEP COLLARS FOR DISCHARGE PIPE SHALL NAVE WATERPROOF
~ , ~ ' 522 \ I ~ ; ; 1 I I `1. CONNECTION TO DISCHARGE PIPE.
ORES ~ { ~ , O ~ r-- I` f 1 ~ ~ I; i i \ ~ ~ . ~ti v v ~ ~ \ ' E ' ! i ' ' 7. SHOP DRAWINGS FOR ALL APPURTENANCES (LE., GATE VALVE,
~ • . i y ~ i f ' Jf ~ ~ . 20 , 1 ~ ~ v v . ~ • • \ i , r, HANDWHEEL, ETC,) SHALL 8E SUBMITTED TO ENGINEER FOR REVIEW q°°°y~easss$iaaasag~e
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12 EMERGE-NAY , ~ r , j I t JOINTS SHALL BE SEALED WITH. MASTIC CAULK. INSIDE JOINTS V
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R~ ~O O ~ N~
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\ EX. GROUND ® ~ ~ o RISER~DETAIL a ~ ~ N
~ (IN FEET)
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CO CRETE RISER 3 NAND EEL WITH 2°X2°X1/4" ~ s s Z ANGLE (TYP.) a
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{MIN.) (IN.) 'c ® EMERGENCY 1/2"0 REBAR vNi
527.04 ~ ~ TOP OF DAM 530.00 5,0Q SPILLWAY ® DRAIN TRASH RACK a • e a
(5° MIN.) ~ ~ ~ SPILLWAY 528.50 o a < ~ 0
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100-YR STORM PEAK - 528.66 0-YR STOR PEAK - 528.52 6
25-YR STORM PEAK - 528. 7 T D ®~ZD 2D
+ 1-YR S70RM PEAK - 527.54 3 'I~ 1O 3 1 • P e ~ 7 ® ® I
FOREBAY ERMANENT POOL - 5 6.50 1 10' M T• Y Lc w
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1 1.5" - 528.50 ~ , 0 TRASH RACK p SEE DETAIL
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MAIN POND ~ DRAIN PIPE ANCHOR BAR SCREEN TRASH RACK ~ - w
1q (MIN.) ~ NTS NTS o N0. BY DATE REVISION
° 90.00 n o F ~0 RC ~ INV. 818.10 P®2 a p
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13 W x 1 L x 15 T 1 J { ' t~ a ADDED VERitCAI SCALE
a CONCRETE ° ANTISEEP COLLAR ~ ~ /
~ ` , ~/\\/~~\\/\\J\/\\~r \ \ \ ti` \ PROJECT: 06~60T0 DATE; 09H4109
° I / N DRAWN BY: JAC CHECKED BY; DEB
~ CONCRETE ANCHOR ~~\.~\i\\ ;
v v a~ TITLE GRASSED EMERGENCY SPILLWAY ~ VIIET DETENTION POND #1
W ON UNDISTURBED GROUND. ¢ CLA55 8 RIP RAP AVER WOVEN N
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W KINGS ~ ~ _x ' \ . ; } \ ~ I ~ s W' ~ \ t \ I, \ ~ \ ~ \ \ \ 1. SEE EROSION AND SEDIMENT CONTROL PLAN PHASE 1 ~ ~
5 HWY Z ~ o ~ I ~ ~ w`' r \ r`\ \ \ \ t i ~ ,(\1 t t.,\, ,j ~1 ~ ~ \ ~ \ \ ~ THRU 4 FOR CONSTRUCTION SEQUENCE PRIOR TO ~ j \ \ \ CONSTRUC110N OF WET DETENTION PONDS. ~ p
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\ ~ ~ , ~ ~ ~ ~ \ ~ \ \ \ ~ ~ 2. ALL NECESSARY EROSION CONTROL MEASURES ARE TO ¦
` ~ ~ 7 \ \ REMAIN IN PLACE UNTIL THE SITE IS TOTALLY t`. ~ STABILIZED AND PERMISSION RECEIVED FROM A r'
} ~ ~ ~ ~ \ 1 ` ~ ii ` REPRESENTATIVE OF THE NORTH CAROLINA DEPARTMENT ~ ~
v tr t1 \ v ~ ~ ~ ~ 1 ~ ~ l ~ \ ~ OF ENVIRONMENTAL AND NATURAL RESOURCES (LAND y~. (V
i \ \ 4 ~ N STOKESDALE ~ J I E t Il e. , ~o ~ \ \ ~ I + } i ' ~ ~ ~ , ~ ~ \ ` l\ tttie,5lsj QUALITY SECTION}, ~ 4 ~ t \
F( C 6~ V A \ , ~ ~ \ vvA `v~ v, `w \ \ ~ : ~ Fy, hey G ~a$ ~ \ \ \ Z~ 1 , ~ \ 1 1 } ' ` \ \ ` \a1\1~ 3. COMMENCE CUT AND FILL OPERATIONS IN POND AREAS i ~ \ \ \ \ `i•`~\~~}~~~'~! THAT HAVE COMPLETED EROSION AND SEDIMENT `z p~ N ~
~ 1 ~ y ~ ~ ~ \ ~ ~ ~ ~ l ; I ~ ~ CONTROL MESURES. ~
R ~ \ \ \ ~ o ~ \ ~ \ \ ~
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~ { ~ ~ 1l ~ ~ill,~~)Sjf BELOW. , { 0 N
~ i ~ ~ ~ \ ~ \ ~t,~ v1 ~ ( 5. INSTALL PLANTINGS AND LITTORAL SHELF PLANTINGS. ~
N / r WINSTON-SALEM J~ ~ ~ 1 . ~ { \ J,r .''''r 1 f ~ , , ~ }1~ i 1,i'/~1~ 6. FOLLOW OPERATIONS AND MAINTENANCE PLANS ONCE ~ ¦
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CALL ULOCO 1 . CONTRACTOR IS FULLY RESPONSIBLE FOR CONTACTING ~r ~ nit \ \ \ ~ \ \ \ \ ' ~ ' ) \ \ \ o j ~
BEFORE YOU D!G APPROPRIATE PARTIES AND ASSURING THAT EXISTING UTILITIES \ \ \ ~ \ > ARE LOCATED PRIOR TO BEGINNING CONSTRUCi14N. i ~ ` \ \ ~ \ l \ ~ ~ ~
2). CONTRACTOR IS RESPONSIBLE FOR PLACING BARRICADES USING _ ~ ';:;r----.._.:~~\, "t;~ t \ \ l ~ ~ ~ ~ f ~ A A C SSAR TO INSURE SAFETY TO THE ,.~':\\.";t~, \ I , \ ~ ~ . ' "~T CONSTRUCTI~ FL GMEN, ETC, S NE E Y v n i k v v~~ v vv A `L,,, 1 ter STRUCTION ~
PUBLIC, { k ° • ; ` A ~a ~ ~
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~ t l / ~ REPLACED ACCORDING TO STANDARDS OF THE NORTH CAROLINA _ , ` ~ \ , \ ~ ~ ~ / r ~ ~ z?
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1-$00-632-4949 y \ \ \ - '''~i / r 1 j m f r
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