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Home My WebLink About20150116 Ver 1_More Info Received_20150720McGill A S S O C I A T E S July 9, 2015 Mr. David Brown US Army Corps of Engineers 151 Patton Avenue, Room 208 Asheville, North Carolina 28801 -5006 Dear Mr. Brown: RE: USACE Action ID 2012 -01332 DWR 401 Certification #15 -0116 Revised Drawings for Stream Pipe Impacts Claremont Solar Park Claremont, Catawba County, North Carolina I am sending you revised sheet C -212 and detail sheet C -508 from the Construction Plans for the Claremont Solar Park project. Due to comments from NCDENR Division of Water Resources (DWQ), the original aluminum arch pipe design was changed to three reinforced concrete pipes (allowing for a low flow pipe). After completing a No -Rise study for the stream crossing, the replacement pipe sizes were determined as two 60" diameter pipes and one 54" diameter pipe, as shown on the revised plans. The original crossing consisted of a single 60" diameter CMP pipe. Due to necessary road improvements and the condition of the existing pipe, replacement was needed. The amount of impact for this crossing (60') did not change. This is labeled as S1 and S4 on the PCN impact table. We have been in contact with Alan Johnson of the NCDENR Mooresville office and will be sending the revised plans to the 401 Permitting Unit in Raleigh for their records as well. If you have any comments or questions regarding this submission, please do not hesitate to call me at (828) 328 -2024. Sincerely, McGILL ASSOCIATES, P.A. CHRISTINE BROWN, CPSWQ, CPESC Engineering Technician III Cc: Rob Wilson, Sunpower Corporation ` Sheri -Morifal`voi- NCDENR- Water.Quallty Permitting; Raleigh;�NC w /attachments" Alan Johnson, NCDENR DWR, Mooresville Regional Office, w /attachments 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, PA • 124019th Street, Lane NW, Hickoi), NC 28601 Office 828 328 2024 • Fax 828 328 3870 • www mcgillengineers corn 1- . ("` - -` \ - J r, � ADW SCASE O'•E'EOVATIONS 1O 1 _ i 9; \ ,� � S , TIN FINISHED GRADE BEHIND WALL = PROPOSED ACCESS DRIVE PLAN BW =900.3 L BW = FINISHED GRADE IN FRONT OF WALL �. TW =900.3 PROP. 18" FES(! BW =893.55 �Do BW= 692.35 �� \® STREAM IMPACT 51: INV. OUT 900.00 � 0' TW =900.1 � I PERMANENT STREAM DISS. /25 -8 CLASS 1 Mo BW =893.55 52- GRAVEL \ �,: EMA 100 YEAR -+• r• CROSSING (3 CULVERTS L =12.0' W =16.5' i /� :111, \� �� 5 • I m3 ° TW =899 -8 -\ PROP• Rppp �� FLOOD LINE /• ti AND STREAM IMPACT THICK-24" 1 -x=899.6 -� pCCE?S �.• �. /• ►. I' 1 ` TWc899 O W %. `.�.�.�•.�• ` STABZAONNT \ HEADWALL OEWALL PROP. CONC. - �Cp� j AT END OF PIPES ` i rrw rr ri r,'/ ^' j ! i i ' i `I \ HEADWALL/TOEWALL `S ` TW =901.5 ) (STRUCTURAL DESIGN l ' ' "i r r r \ (STRUCTURAL DESIGN \' TW =901.1 C PROVIDED BY CONTRACTOR) BY CONTRACTOR) TW =900.7 901.5, - INV. 891.45 SEE DETAIL SHEET C -503 TW =900.4 't -T}i ( 6 BMh S4: DI 20 -B CLASS 2 FOR NON-STRUCTURAL 6 n 55.5' Ilya ) ®L= 0' W'25.0' • ASPECTS) TW =9000 9 �a . , e9' ) �q ICK =24" h B J FEMA NON- &� ulr L___-, - -_ ___ -.- -- ♦ - S '� -' •Y- -* ) (DO NOT DISTURB PROPERTY gal ? �( ENCROACHMENT T �� OUTSIDE SO. OXFORD ST. R.O.W.)1 _ ( � ; .)• . , � AREA 1 1 DO NOT DISTURB .\ O... h�► _ - , 1 \ " 1 EXIST. SEWER `, I;: •. STREET R/W - =° _ - - - , 1 , I ; I 1 ll `, \" _° 041696 . SOUTH OXFORD „� - 1 '1/? � �� w +w +u+ ill I I I S^' ENGINEERS "TAMP >s - - , l \ ' 1 `1 �\ Y PROP. 18" FES \ \ -_ -r -_ - -- - C 3 -_ DISS. #25-A CLASS 1 VALVE BOX TO\ \\ ADJUST WATER \ \\ - - -_- PROP. 18' RCP �..�• - _ _ , -}�i ___ - L =12.0' W =16.5' 99 LF 04.55% HICK =24' SURFACE / MATCH FINISHED --------------- - - ^ \ \\ \\\ \ �,� (DO NOT DISTURB PROPERTY \\ (1) 54' RCP `�• \, OUTSIDE S0. OXFORD ST. R.O.W.) a J 40 LF O 0 38% INV IN 54" RCP UNDISTURBED EARTH 60" RCP III INSTALL INV. 1.5' BELOW GRADE - -1 I L, BASE FLOW B CHANNEL' EXPOSED PROP. TYPE 3 RIP RAP \\ LL �� SWALE - SEE DETAIL \ MIN. 1' OF R PRO OVER PIPES (SEE ROAD 8 S1: PROP. 1 60" RCP SEWER PIPE \ Q ( •�• -• SHEET C -501 tY r PROFILE FOR PROP. FINISH GRADES) 41 L.F. O 0.37% INV IN = 891.00 `•� 1 \ a \\ Q {V EXISTING BURY 1.5' o'_n• �'_n' 60' RCP PROP. ITOEW \ GROUND - HEADWALL /TOEWALL G/.\, �•, � � y.�. \ � J d ... -�I 8 51: PROP. (1 60" RCP AT END OF PIPES ...... ' " "' )) (STRUCTURAL DESIGN " " " " " " " " "' 41 LF. O 0.37% INV. IN 893,70 ...... .................. " ..... " - PROVIDED BY CONTRACTOR cu II ® S4: CONTINUE TO.. INV. 691.00 %•�• �� STABILIZE DISTURBED BANKS, S4: DS`j�20 -A CLASS 2 � �I �/ �. '` Z - - COMPACTED 5.0 W =20.0' BEYOND THE RIP -RAP WITH NAG C1258N ® ICK =24" /� �� T.9 •� I $ BACKFlLL COCONUT FIBER MATTING ON THE SLOPES. ED DO NOT DISTURB PROPERTY �P `./• a NOT CONTINUE MATTING THROUGH STREAM BED ( /� /j' 0 lr „' OUTSIDE S0. OXFORD ST. R.O.W.) ® T �• cRAPfucscwtE 1D+CH= 4orrr �w" I- 1 I -1 1 I STREAM IMPACT 51: PIPE INSTALLATION KT!L - ROPOSED ACCESS DRIVE PROFILE 9. 0 x oil L) m E > < w� �N orn 9. 0 S DRIVE ADE ao 940 I PM STA.:- 5.20. PROP. ACCE PROFILE 930 910 _ 9 890 `'" �� - - - - - - - - - 8 0 - _ e r-A .7. .3!97.07 _ A0. • K: 35.4 9.37 9 2 0°' `C ® B / ap0� R o = ° 920 910 STA . 9.2649 ETA 91.17 , o 100.00• VC 1(o.00' VIC e PV A .123. 93 u Ev ..67 67 a $ a K: 10.17 30.00' VC 900 ® - - e PIPE OA CENTERLINE OFTTOF i I 890 P PEP T CENTERLINE OF THE 880 PROP. e E.ISTINC 48"., CLOWi UiAN CENTERLIN ' RCP TO IPE. INSTALL. LL, virt IN E OF ROAD 1 EPLACE IN BASE RT Al 890.93 _ 3+00 JUL 2 0 2015 I Du1 8 BUFFE RMITT EG 5 ING T 10+00 9+00 8+DO 7+00 5 +00 5+DO 4+00 3+00 in U u _ o _ ♦ Y .Y- '_0 Ml N IRII<lmlo OPPORTUNITY PROJECT 11098 DATE DRAWN OCT.. 2014 DRAWN BY RLC 2+DO 1 +00 0 +50 McGILL PROJECT NO. 12.01416 off" @McGiff SHEET C-212 m A S S O C I A T E S ENGINEERING-PLANNING•FINANCE '1019R ^REET.IANE IRO' NKl[OEY. NE}IS01 %I.ILNIJ?FtW+ FIRM I.MFNYIfpJ9 'I 'E'i ,4,Y uwhMlANU.WJU - r —1, UNSUITABLE SUBGRADE MATERIAL AS DETERMINED BY ON SITE GEOTECH - MATERIAL TO BE REMOVED ACCESS DRIVE UNDERCUTTING EXTENTS AND DISPOSED OF OFF -SITE �_ - SUBGRADE TO BE DETERMINED BY UNSUITABLE MATERIAL TO BE REPLACED WITH GEOTECH ENGINEER 12' LIFT OF COMPACTED ABC STONE ON TENSAR BX -1100 BIAXIAL GEOGRID ' I -1 1- I I - I -1 " 1 I III -1 _III -I I IE II I I-I I I =11'" III -111 —III III — III =1- 12 TENSAR BX -1100 GEOGRID DUKE ENERGY ACCESS DRIVE SUBGRADE UNDERCUTTING /REPLACEMENT DETAIL N.T.S. A. RFACE COURSE NOTE : ALL THICKNESSES SHOWN ARE MINIMUM COMPACTED. DUKE ENERGY PAVED ENTRANCE N.T.S. (ASPHALT SURFACE MAY BE INSTALLED FOLLOWING COMPLETION OF PROJECT CONSTRUCTION) INSTALL ACCESS ROAD 9 -6^ GRAVEL BETWEEN NORMAL 15-- f EDGE OF ROAD AND CONCRETE PAD — INSTALL BOLLARD AT - CORNER OF PAD o � V) !T w U U a 7•_p^ wJ U PLAN n CONCRETE TRANSFORMER PAD cl. Lu Nw' 4w s • • a �� 7% • • v s i �l ►I\ iI�. � �;� CONCRETE HEADWALL/TOEWALL NOT TO SCALE HEADWALL/TOEWALL PROVIDE DRAINAGE BETWEEN PADS y 7' -0^ AND REINFORCEMENT SHALT. BE CONCRETE PROVIDED BY THE CONTRACTOR AND STAMPED BY A NORTH CAROLINA LICENSED PROFESSIONAL ENGINEER INVERTER PAD INSTALL BOLLARD AT CORNER OF PAD EDGE OF PANEL ARRAY INSTALL ACCESS ROAD 9 -6^ GRAVEL BETWEEN NORMAL 15-- f EDGE OF ROAD AND CONCRETE PAD — INSTALL BOLLARD AT - CORNER OF PAD o � V) !T w U U a 7•_p^ wJ U PLAN n CONCRETE TRANSFORMER PAD cl. Lu Nw' 4w s • • a �� 7% • • v s i �l ►I\ iI�. � �;� CONCRETE HEADWALL/TOEWALL NOT TO SCALE HEADWALL/TOEWALL STRUCTURAL DESIGN OF WALLS AND REINFORCEMENT SHALT. BE PROVIDED BY THE CONTRACTOR AND STAMPED BY A NORTH CAROLINA LICENSED PROFESSIONAL ENGINEER _ r✓ ✓ 3% MAX. SLOPE �-✓� � 3:1 MAX. —AWAY FROM PAD SLOPE — CONCRETE TRANSFORMER PAD CONCRETE INVERTER PAD PEE STRUCTURAL PLANS (SEE STRUCTURAL PLANS OR FURTHER DETAILS) FOR FURTHER DETAILS) — EDGE OF SLAB REVEAL NORMAL FINISHED GRADE ALONG ACCESS ROAD ALONG GRAVEL ACCESS (2- MIN. - 10' MAX.) ROADS CONCRETE INVERTER PAD (SEE STRUCTURAL PLANS FOR FURTHER DETAILS) II PROVIDE DRAINAGE SWALE UPSTREAM OF PROFILE EACH PAD 3' WORK AREA BEHIND TRANSFORMER PAD GRADED TO 3% OR FLATTER AWAY FROM PAD CONCRETE INVERTER PAD CONCRETE TRANSFORMER PAD (SEE STRUCTURAL PLANS OR FURTHER DETAILS) 3' WORK AREA BEHIND INSTALL ROAD GRAVEL TRANSFORMER PAD TO EDGE OF PAD r (3% MAX. SLOPE AWAY FROM PAD) i EDGE OF SOLAR PANEL ARRAY NOTE: CONTRACTOR SHALL VERIFY ALL CONCRETE PAD DIMENSIONS WITH STRUCTURAL PLANS TYPICAL INVERTER STATION LAYOUT & GRADING DETAIL N.T.S. SECTION THROUGH TRANSFORMER PAD PLANS PROP. CONC i CONCRETE _ I I 6' SCH. 10 STEEL OR IRON�� - PIPE FILLED WITH CONCRETE OUTER YELLOW POLYETHYLENE MIN. I I I I I I I I I I EASTING —I I GROUND CONCRETE MIN. MIN. SEAL 811688 _ �i' f�lill�'1S ENGINEER'S '.:TAMP Y Q IL Q J O un I— Z O LLI O Q W J o U m 0 n_ W I I I I I I n °olo�r%Tc V) S � U U O ° m a 0 ZpZp F Ln N M O U V W M O F m z a z W LM 6 m U O t� K OPPORTUNITY J Q W Q W r� LL Q Z U) 8� kI J BOLLARD DETAIL PROJECT 11096 REVISION DATE- NOVEMBER 3, 2008 DATE DRAWN OCT., 2014 DRAWN BY RLC McGILL PROJECT NO. 12.01416 OMcG� SHE s/1 �((��ott A S S O C I A T E S /1 508 ENGINEERING•PLANNING•FINANCE V VVJ V . INOIAhaIRBki.LWENW NKTm0.Y.NC]M01 Nliall l'BHLV FNW LImEEIC0NT9 . 118 0&GETAILS.ONG .:. HEADWALL/TOEWALL 1 PIPE RISE (LOWEST PIPE) h .• COMPACTED CLAY PROP. WALL FOOTINGS AS REWIRED BY a'..'. !:� r ' • MATERIAL TO BE APPROVED BY ENGINEER STRUCTURAL DESIGN - .. ti _ _ .. .. PROFILE i CONCRETE _ I I 6' SCH. 10 STEEL OR IRON�� - PIPE FILLED WITH CONCRETE OUTER YELLOW POLYETHYLENE MIN. I I I I I I I I I I EASTING —I I GROUND CONCRETE MIN. MIN. SEAL 811688 _ �i' f�lill�'1S ENGINEER'S '.:TAMP Y Q IL Q J O un I— Z O LLI O Q W J o U m 0 n_ W I I I I I I n °olo�r%Tc V) S � U U O ° m a 0 ZpZp F Ln N M O U V W M O F m z a z W LM 6 m U O t� K OPPORTUNITY J Q W Q W r� LL Q Z U) 8� kI J BOLLARD DETAIL PROJECT 11096 REVISION DATE- NOVEMBER 3, 2008 DATE DRAWN OCT., 2014 DRAWN BY RLC McGILL PROJECT NO. 12.01416 OMcG� SHE s/1 �((��ott A S S O C I A T E S /1 508 ENGINEERING•PLANNING•FINANCE V VVJ V . INOIAhaIRBki.LWENW NKTm0.Y.NC]M01 Nliall l'BHLV FNW LImEEIC0NT9 . 118 0&GETAILS.ONG