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Home My WebLink About20071826 Ver 1_Stormwater Site Plans_20080122'I / ~ ~ ~ q ~ ~ ~ ~ ~ ~ ~ ~ / . r ~ ~ 1= rn / v~~; ~ l~ i i 0 ~ , ~ i ~ 1 ~ ~1 ~ I ~ ~ ~ / ~ ~ / ~ / I I 1 1\ \ 4 ~ ~ ~ ~ ` i l ~ it l / / ~ ~ 1-~ Q-Z / I ~ i ~ ~ j ~ ~ ~ ~ / ~ , 1 ~ ~ ~ ~ / ~ ~ ~ ~ l 11 ~ l l ~ ~ ~MZ~_W~pF-~ Fez - ~ ~ / / ~ I I i II ~ ~ \ ~ ~ r ~ / i~iil I l I OWWp~~N~WW - / ~ ~ ~ , 1 ~ I ~ I ~ ~ I ~ ~ / ~ ~ ~ / it ~ / I / / ~ N ~ W Z ~ ~ Q 1 ~ ~ / ~ 0 ~ ~ / ~ / ,r ~ 1 1 ~ 1 - --see ~ / / ~ / ~ / ~ 'r,~::~. , I ~ ~ I 1 1 ~ ~ % ( ~ / l rill r / ( ~ ~ I I I ( 1 ! i i~ l~ l l~~ l ( (r ~ l 1 ~ ( l~' / ~ ~ ~(l/ lil l / I ~ ( ire R • ~ ~ i ~ •.~t API l / / / / ( i ( l 1 1 1 1 1 I l ( ~~•~~~oR,~....~~q i ( ( ( ~ ~ ~ ~ ( ((I 1 ~ 1 ~ I ( I ~ ~ j ~,.~gF~ss~••~~~~,~~ i / . w;;:' . ~ , _ _ -676--- / ~ / / ~ ~ / f ( 1 `C O ? ~ 1 ~ 1/ i i / ~ I I I( I( I ~ ~ ~ / / / ~ ~ ~ 1 i I i I ~ I { I jt i I ~~~1 ~ ~ / ~ (~~~~II iI~II III ~ I '~~~o 1 1 I ~ I I ~~Q • ~ ~ / i ~ / ~ / ~ ~ / / i~•. ~ / ( ~ ~ I ~ I 11 li ~ 1 ~ ~ ~ '''+~i~i ~ii~+~~~' ~ ( I ~ ~ ti l 1 L i ~ / , i . i / _ ` / / 1 ~ ~ 1 ! ~ c i ~ / / ~ / r,/ / / ~ I ~ ~ 1 1 1 ~ ~ Z ~ ~ , ~ i / / ~ i ~ ~ / , , ~ , ~ , , ~ ~r z ` / ~ i ~ / ~ _ / / , ~1 r' ~ ' / l ~ ~ ~ ~ ~ ~ Z r 1 , r ~ 1 ~ / ~ ~ \ r~ ~ ~ / ~ 1 ' u~a ~C --.666- ~4 ~ ~ - ~ r ! / _ - ~ ~N 0 - _ RUNOFF,~CI.L AND"VELO01"TY, ~ ~ _ ~ - 1 ' / ~ / ~ i ~ _ ~ - - - ~ ~ RAY o' - ~ WILL,DrSSIP2rT~ PRIO~TQ~NTE,RINrG,,' , ~ ~ ~ y- ~ - - ~ ._,....700- `1~ ~UJDE~,UTTORAI. •l ti ~ S~Tf~EAM,Bt'1FF~i~ ~ ~ r ~ , , , ~ f ~ _ _ ~ ~ _ _ mss- - _ _ _ - - ~ 1 ~ ; ~ \ ~ ' ~ ,r ,r ~ ~ ~ f~AP, aPRON•`~ ~ ; % S,~M~ ~ , ~ ` ~ , ~ bETE?~Tf~ON - - -X04-... _ _ _ ~ t m I 1 \ \ \ ~ \ ~ ~ ,..,~~6 - ! m ~ \ \ \ ` ~ ~ ~ d50~ TktK~ % , ~ ~ ~ ~ i ~ _ ` ~ ` T.RIlCIU.RE I ~ I f I ~ - yes- _ ~ ~ 1 ~ / ~ ~ ~ ~ ^ - i 1 I 1 l i ~ ~ ~ ~ ~ - _ ~ / ~ l I ~ I I ~ ~ ~ ) 1 / l I ~ ~ ~ ~ ~ ~ I ) ~ / / I / 1 ~ ~ - _ - / ~ ~ ~ ~ .~--518"ear 1 I 1 I 1 1 ~ ~ e~ / \ 6 / S ~ i I / / DEG ` . ~ i ~ ~ 1 r~ i 1 s~ _ ~ ~ ; f 1 I 1 I : - parr '20's~arr.- sewe~esmt' _ SSM~ _ f f I ~ ~ k ~ ~ toc~ ti ~ i f / f / I ~ I t 1 I 1 t ~ • i~ ~p~rox. approx. tocatlo~~~_ ~ ~ ~ ~ ~ : ~ / / I 1 ( l I I ~ ~ ~ ~ ~ f / l/ ~ I I ~ 1 p' f l f/ f l I ~ I 1 l 1 ~ As ~ k, BAY INV. 676.00 ~ l ~ / / ~ 1 I ~ ~ 9 1 / / / _ --a7~-- J f 1 1 \ 68 Ir ~1 I f I l I 1 M~ ~ ~ ~ ~ . _ / ~ I I l I ~ Z ~ E A~1D Q11T ~ / ~ ` ~ - - - - ~ ~ ~OPID BRAIN 10' LIT~ORAL SHELF ~ ~ ~ Q ° ~ 1 AR A A T;wll$ T1M . ! ° ` I C L ULA~'{0 1 ~ ~ 3 ~ 1 M E~'111 U SI FbRI 1 ~ ~ ~ ,.696 ~ ~ ~ / i ~ I Q 1 ~ ~ / - I M ~D T~iE 1 ~ i 1 ~ ` ~ ' ! 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P 1 / / I 1 ~ 1 ~ ~ ~ Z o ~ I _ ~ o I I{ I I i ~ i 1 1 I I ~ 692 ~ ~ ~ ~ , / r ~ ~ ~ Q ~ Q ~ ~ ~ I~ I I ~ ~ - ~ ~ f ~ 1 1 1 I 1 \ l y ~ I I I / i / ~ i ~ l i ~ ~ I( 1 ~ I / i ~ I I G t l I I I t \ ~ ~ - / i t G~DES,~PdISL~XOUT ~ ~ ~ ~ ~ ~ ~ , .FORE- tY I I I l / ~ ~ ~ i 1 I I I RE OT x ( 1 I ~ l / / {A ~ 1 v 1 I I I I I ~ / i ` / ' I 1 RE OT FINAL AT THiS V _ ~ ~ ~ ~ ~ / / ~ BAY` ~ ~ ~ ~ Q ~ / ~ _ I I I I / i i ` ~ ~ / ~ 1 J I I MPE VIC = t! l ! ~ I} I , i ~ , ~ 1 I I UR OSE ~MPE~VIOUS AREAS FOR C ~~1LATIOI~f~ / ~ ~ / / / % _ = Z I'""' ~ I 1 1 I ~ ~ ~ ~ 1 ~ P I I t I ~ ~ ~ ~ I 1 MAX MUM PUR OSE~ ARE ASSUMED 0 TFIfr~ , / ~ ~ AX~MUM~ ALLOWED ~ ~ ~ ~ ~ ~ ~ / ~ t~ I I I I I I ~ I i ~ r ~ I i t 1 M I ~ ~ ~ ~ ~ ~ 0 - / I I I f ~ ~ I, I - ~ I ~ I I ~ / f- ~ ~ / 1 ~ I 1 I { ti i / / / ~ ~ v ? I { 1 I I ~ ip ~ I I I / / , ~ I I I ~ I N I r I V f ~ 7es ~ ~ r ~ ` ~ ~ I 1 ~ ~ ~ ' ~ v / i ~ ~ ~ tp J I hi ~ ~ I ~ f f ~ ~ r ~ - - - ~ ~ I I I _ _ I 1 I i ~9 ro f ~ ~ o ~ ° /rte ~ ~ ~ / / ~ ~ ~ I I ~ I N I l i ~b 1 I\ 'rte \ ~ ~ 1~• 1 i I I f ~ - ~ ~ I ~ r _ •rr, ~ I i I i 1 1 ~ ~ _ ~ _ ~ ice..,, ~ ~ % ~ 1 ~ 1 ~ ~ 1 1 l I - I r 1 ° ~ ~ Q 1 ~ ~ 1 1 1 1 I % 11 ~ l / , , / ~ i ~ ~ _ _ - - ~ fA i- ~ ~ / ~ fr ° I ~ / _ / ~ 1 ,1'i~~/ 6~ 3 3 1 ~ ~1 l ~ ~ 'r? ~ 1 1 / / ~ ~ ~ / ~ ~ ~ ~ ti9 tl~f C ~ ~ a ~ l ~ l / ` ~r, / ! 1 E / i ~ V ~ ~ ter: ~ ~ I f 1 ((r ( ( ( ~ ~ ~ / ~ , ; - - _ _ 01 /07/08 ~`r ~ ~ ~ ~ ~ I ~ ~f ~ ~ ~ i / ~ ~ ,,'r Date ~~r I ~ L / ~ ~ ~ ~ I I l n i f I 1 ~ / ~ 1 i { ~ I I I ~ evasions 1 \ ~ / 1 I I I ~ \ / / 1 I 1 I t I I ~ ~ ~ ~ ~ ~ VICINITY MAP 3 I ~ / / ~ / ~ ~r. r ! 'I I l II ~ II ~ ~ ~ i ~ ~ / ~ 696 / ~ NOT TO SCALE I ~ - _ / ~ i / I ` I GR H S ~ ~ ~ ~ ~ I ~ ~ ~ ~ 1 I / ~ o~° ~ t _ , o ~ ~ ~ / I _ I / / ~ - ~ ~ ~ ~ ~ ' ~ ~ 0 1 ~ ~ i I h I ~ 1 ~ ~ I 1 h ~ ( ! ( ITE~ ~ ~ / N ~ ~ V 1 ~ i % \ ~ ~ N ~ e~ ~'ra1 g 1 ~ ~ ~ 1 ~DCI1 ~ 1 ` ~ ~ ~ KAl'H1C SCALE/' 698 ` i Project Number 246-094 i IN Sheet of C ` } i inch 50 fL I I J N 0 r r~ WATER QUALITY BASIN CONSTRUCTION SPECIFICATIONS' A. EARTHWORK 2.0" MIN 2YEAR Fl,pyy 1. THE FOUNDATION AREA SHALL BE CLEARED OF TREES, LOGS, STUMPS, ROOTS, BOULDERS, SOD AND UNSUt SHQFFNER ~ z 0 ~ ~ , , WA3T}I-24 RIP RAP BERM sTRUCtuRE VEGETATION. THE TOPSOIL SHALL BE STOCKPILED AND SPREAD ON THE COMPLETED DAM AND SPILLWAYS. TF 1 A AND WEIR THOROUGHLY SCARIFIED BEFORE PLACEMENT OF THE FILL MATERIAL. 50D AND UNSUITABLE 301E IF NEEDED TO ESTABLISH W ~ )SPILLWAYS. THE FOUNDATION AREA SHALL BE HWY. 73 AT I.85, CQNCORD, NC = p ~ W w N ~ m ~ TOP OF BB2M TOP OF BERM ~ k- 2. EXISTING STREAM CHANNELS IN THE FOUNDATION AREA SHALL BE SLOPED NO STEEPER THAN A RATIO OF t 1'-0^ ?.ter I SHALL BE DEEPENED AND WIDENED AS NECESSARY TO REMOVE ALL STONES, GRAVEL SAND STUMPS ROOT: TOP OF WEIR AN A RATIO OF ONE HORIZONTAL TO ONE VERTICAL. THEY WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT ~ ~ ~ m ~ ~ ~ ~ PERMANENT POOL PERMANENT POOL AND TO ACCOMMODATE COMPACTION EQUIPMENT. FOUNDATION AREAS SHALL BE KEPT FREE OF STANDING M ~cP'` TOP OF WEIR ^ . , i THE BORRO A o v" ?V , W REAS SHALL BE CLEARED OF STUMPS, ROOTS AND UNSUITABLE SOIL, THE WATER QUALITY BA OF STANDING WATER WHEN FI~13 PTLACED ONN HTEM,IAL ~ Q O ~ ~ Z N ~ THE WET DETENTION BASIN SYSTEM q DEFINED AS THE wEi m ~ ~ v `;;{ar rq Fa ~.''eJ s r t I I REMOVED. 'ER QUALITY BASIN SHALL BE CLEARED AND ALL STUMPS DETENTION BASIN, PRETREATMENT INCLUDING FOREBAYS ANDTHE Z LL ~ Q.° IY Q Q Z VEGETATED FILTER IF ONE IS PROVIDED, 0 ~ 0 O Q. Z Z ~ N ~ ' ~ r.~ .w.. s,a. .a.:.'' I I 3. BEFORE FILL( NG OPERATIONS BEGIN, THE SOILSfNGINEER WILL TAKE REPRESENTATIVE SAMPLES OF EACF THEM TO DETERMINE THE COMPACTION AND CLASSIFICATION CHARACTERISTICS PROCTOR TES .ONLY 0 N ,.,,J f ( T) TH MPLES OF EACH PROPOSED FILL MATERIAL AND TEST MA/NTENANCEACifVIT1ES SHALL BEPERFORMEDAS FOLLOWS: 7 ~ Z Z W Z_ Q ~ Q 1'•0` ABOVE FORESAY BOTTOM SUITABLE ILL BERM AND WEiR SECTION eACKF SOILS ENGINEER WILL BE USED AS FILL ON THE ~AM. GENERALLY SM OR 5C CLASSIFICATION SOILS WIlL BE AI EST). ONLY TH03E MATERIALS AS APPROVED BY THE q IOILS WIlL BE ACCEPTABLE. COMPACTED EARTH FiLLS tL ~ ~ ~ U ~ W V Q ~ SHALL BE CONSTRUCTED TO THE ELEVATIONS, LINES, GRADES AND CROSS SECTIONS INDICATED ON THE PLAT Z ~ FOREBAY DRAIN WITH SUOOE3TEDVALVE. WATER QUALITY ORIFICE 0.5 9e SLOPE MIN, 4. AFTER STRIPPING OF FOUNDATIONS AND REMQVAL OF WEAK OR UNSUITABLE MATERIALS HAS BEEN COMPL 'ED ON THE PLANS. 1, AFTER EVERY SION~ICANT RUNOFF PRODUCING RAINFALL EVENT D W W ~ ~ (/j W W ~S BEEN COMPLETED, ANb BEFORE START OF MATERIAL ANDAT LEAST MONTHLY: ~ d, W Z Q 0 ~ Z Q ~ GEOTECHNIC EN 1 P ~ AL G NEER LACEMENT, COMPACTED EARTH SHALL BE USED TO FILL ALL STUMP HOLES, MINOR EXCAVATIONS AND DEPRI ON6 AND DEPRESSIONS FOR CAVITIES INSIDE THE EARTH a. INSPECT THE WET DETENTION BASIN SYSTEM FORSEDSdENT = 0 Z Q O W W O O: MUST TEST AND GIVE BERM AND WEIR DETAIL WATER QUALITY ORIFICE DETAIL FILL LIMITS. 5. FILL SHALL BE PLACED IN HORIZONTAL LAYERS OF NOT MORE THAN (9") LOOSE DEPTH. AS SOON A5 FEASIBt ACCUMULATION, EROSION, TRASN ACCUMULATION, VEGETATED ~ a t~ a 0 m a ~ON A5 FEASIBLE AFTER STARTING CONSTRUCTION OF A ~~R, AND GENERAL CONDITION. 5. REMOVE CATTAILS AMD OTHER INDIGENOUS WETLAND PLANTS Z ~ ; ~ ~ SOILS AND COMPACTION FILL SLOPE THE CENTRAL PORTION THEREOF S LL BE REQUIREMENTS ON DAM RACK, e' MINUFREEBOARD TRASH -MAINTENANCE ACCESS SIDE SLOPES. ~ BUILT AND MAINTAINED SLIGHTLY HIGHER THAN THE S iER THAN THE SIDES TO ALLOW FREE DRAINAGE TO THE b, CHECK AND CLEAR THE ORIFICE OF ANY OBSTRUCTIONS SUCH WHEN THEY COVER 50°x6 OF THE BASIN SURFACE. THESE PLANTS (j,) > 5'TOPOFDAM"MIN. SECTION FOR WETPOND. FROM TEMP. POOL ELEV. 182' FREE BOARD 8. EACH LAYER OF FILL SHALL BE COMPACTED BY ROLLING WITH COMPACTION EQUIPMENT WHICH IS BEST SUI THAT DRAWDOWN OF THE TEMPORARY PDOL OCCURS WRHIN 2 BHALL BE ENCOURAGED TO GROW ALONG THE VEGETATED SHELF ITCH IS BEST SUITED FOR THE TYPES OF SOIL to 5 DAYS AB DESIGNED. AND FOREBAY BERM. MERGENCY WEIR ENCOUNTERED. FILL ADJACENT TO PIPE CONDUIT AND ANTISEEP COLLARS SHALL BE COMPACTED BY HAND. E ORIFICEWITH u1TORAL SHELF WiWETUWD ANOroR TO NOT LESS THAN 95% MAXIMUM DRY DENSITY SSTANDARD PROCTOR) AT OPTIMUM MOISTURE CONTENT. WE tED BY HAND. EACH LAYER OF FILL SHALL BE COMPACTED Z• REPAIR ERODED AREAS IMMEDUlTEL7, RESEED AS NECE98ARY TO 6. IF THE BASIN MUST BE DRAINED POR AN EMERGENCY OR TO PARKING 60 YEAR EVENT INVERTEDWAIER PLANTiNGB, MANIPULATION RiP RAP BERM RISER 70 SECURE UNIFORM MOISTURE ONTENT THROUGHOUT EACH LAYER SHALL BE REQUIRED. D STORMWATER STORAGE QUALITY ORIFICE. 10' MIN.WIDTH FREQUENCY AS SPECIFIED BY THE SOILS ENGIN ER. AS A MINIMUM, TESTS WILL BE PERFORMED ON EVERY TF E CONTENT. WETTING OR DRYING OF THE MATERIAL AND MAINTAIN GOOD VEGETATNE COVER, MOW VEGETATES COVER TO PERFORM MAINTENANCE THE FLUSHING OF SEGMENT THROUGH THE 3E REQUIRED. DENSITY TESTS WILL BE PERFORMED AT A MAINTAIN A MAXIMUM HEIGHT OF SIX INCHES, AND REMOVE TRASH AS EMERGENCY DRAIN SHALL BE MINIMCiED T07HE MAXIMUM EXTENT gave YH y , o~pR Coq' I/ AND WEIR ll')CATED THIS 91DE CLASS B RiP RAP 3~ pETAII WHICHEVER COMES FIRST. AL30 DENSITY TEST ILL BE PERFORMED WHENEVER FILL MATERIAL CHARACTER( :DON EVERY THIRD LIFT OR EVERY 1000 CUBIC YARDS NEEDED. PRACTICAL, ~ AL CHARACTERISTICS CHANGE. 3. INSPECT AND REPAIR THE COLLECTION SYSTEM (LE. CATCH BASINS, 7. ALL COMPONENTS Of THE wET DETENTION BASBI SYSTEM SHALL r'~•0 ~ E~'a9o'°• 1B"MIN.DEPTFL B.OUTI. DEVICE PIPING, SWALES, RIPRAP, ETC.J pUARTERLY TO MAINTAIN PROPER BE MAINTAINED IN GOOD WORKING ORDER. ; ~QP S/ ~i 8" MIN. FREEBOARD 1.OUTLET DEVICE COMPONENTS ARE TO BE FABRICATED A3 SHOWN ON THE PLANS. DETENTION STRUCTURE EMBANKMENT 2. CONTRACTOR TO SUBMIT DESIGNED SHOP D WINGS TO THE CIVIL EN SEE DETAIL RA GINEER FOR APPROVAL PR10R TO CC FUNCTIONBIG. B. LEVEL SPREADERS OR OTHER STRUCTURES THAT PROVIDE DIFFUSE s ~ ~ Z AL PR10R TO CONSTRUCTION TO THE OUTLET DEVICE. 4. REMOVE ACCUMULATED SEDIMENT FROM THE WET DETENTION FLOW SHALL BE MANTAINED EVERY 8U(MONTHS. ALL ACCUMULATED Y" • 9F.Q~ 9 SHOP DRAWINGS SHOULD INCLUDE pREGAST BqX DESIGN, TRACH RACK, GRAtED COVER, ALUMINUM STEPS, I FE5 TEMPORARY POOL$31.001 1'•0" I MINUM STEPS, AND ALL DRAIWORIFICE PIPING REQUIRED. BASIN SYSTEM SEMIANNUALLY OR wHEN DEPTH IS REDUCED TO 75Ye SEDIMENT AND DEBRIS SHALL BE REMOVED FROM THE STRUCTURE, „ ~ ° 2~® PIPE - ~ C. CO CRETE - PER NENT POOL 1. ALL CONCRETE SHALL CONFORM TO THE STANDARD SPECIFICATIONS FOR READY MIXED CONCRETE. ASTM I I-I 11-I I I I i--'d. i----I i t--i i- BHELFEL. OF THE ORIGINAL DESIGN DEPTH, REMOVED SEDIMENT SHALL BE AND A LEVEL ELEVATION SHALL BE MAINTAINED ACROSS THE ENTIRE : q NCRETE, ASTM C 84, ANAIR-ENTRAINING ADMIXTURE DISP08ED OF IN AN APPROPRIATE MANNER AND SHALL BE HANDLED FLOW SPREADBIG STRUCTURE. ANY DOWN GRADIENT EROSION MUST ~ ~fi~ J _ _ : 3HELFEL 2•ANTI-SEEP SHALL BE ADDED. THE CONCRETE 8HALL BE PROPORTIONED TO MEET THE FOLLOWING REQUIREMENTS: =I ~ I hI _ ~ I~ I hI I I ~ ~ ~ ~-=III : COMP E V REMENTS: IN A MANNER THAT WILL NOT ADVERSELY IMPACT WATER GUALTTY BE REPAIRED ANDIOR REPLANTED AS NECESSARY. °~~~'9 COLLARS R 331 E STRENGTH: MINIMUM 3600 PSI STORM INLET e:t ~0~ 1'-0" INV 10' MIN, WATER c ~+c -CEMENT RATIO: 0.40-0.50 (I.E. STOCKPILING NEAR A WET DETENTKIN BASIN OR STREAM, ETC.I, RESPONSIBLE PARTY: f ~ 1111 10' LITTORAL ¢ OND i , ONDMN. SLUMP: MINIMUM 3", MAXIMUM 5" SHELF, MIN. ; _ AIR CONTENT: MINIMUM 5%, MAXIMUM 8°k THE MEASURING DEVICE USED TO DETERMINE THE SEDIMENT / 4 ENERGYD1381PATOR i_ -II - - _ - - 'J COARSE AGGREGATE: 1"-1112" f 1 ff I-III= =I ~ _ ~ - - - - - I III- , ~ ~ ~ I i- ELEVATION SHALL BE SUCH THAT R WILL GNE AN ACCURATE DEPTH owNEwDE~LOPER READING AND NOT READILY PENETRATE INTO ACCUMULATED AAC AMERICAN A88ET CORPORATION 2,13LOPE 9 1 I I~I - I _ I I--III.--_. I. I I ---.III-I I I~I 1- TAB LIZED _ , ~ ~ , ~ D. Gfi'ASS1N0 TO POND BOTTOM OR -III BACK OF OUTLET 1. GRASS ALL AREAS DISTURBED BY CONSTRUCTION PER SPECIFICATION OF EROSION CONTROL DETAIL SHEE SEDIMENTS. 5700 ARCO CDRPORATE DRIVE RETAINING WALL I I- FOREBAY DRAIN WITH BTRUCTURE LOCATED DUCTILE IRON EMERGENCY E. PLANTING >L DETAIL SHEET, CHAAlOTTE, Nc 26219 WHEN THE PERMANENT POOL DEPTH READS _ 1.163 FEET IN THE MAIN SEDIMENT FOREBAY sUGGESTEDVALVE, TOE OF8:1 SLOPE DRAIN PIPEWI'TIiSLUICE 1. PLANTINGS ARE DESIGNED PER THE GUIDANCE OF THE HARP (HABITAT ASSESSMENT AND RESTORATION PR POND, THE SEDIMENT SHALL BE REMOVED. Fuc. Oa)2 ~ O :STORATION PROGRAM} MANUAL. ~ NOTES 0.5 % ELOPE MIN. MAIN POND R M oU7LETM D LOCATE 2. ADDITIONAL PLANTING INFORMATION CAN BE FOUND IN TABLE 2.2 OF THE NORTH CAROLINA BEST MANAGEM VALVE IN BERM) 0.590 BEST MANAGEMENT PRACTICES GUIDELINES. WHEN THE PERMANENT POOL DEPTH READS _ 1.753 FEET IN THE ~ ~ N REVISION6 1. GEOTEXTILE LINER 8HALL BE REQUIRED SLOPE MIN. 5 FOOT M NTENANCE ~~~i°'"-`s;rl~~ N0. DATE DESCRIPTION IF EXI3TINIG SOILS ARE PERMEABLE OR ANTi•FLOTATION ACCE3SAT TOP OF BERM .7~1?~~„>. FOREBAY, THE SEDIMENT SHALL BE REMOVED. L.L. FOND CROSS SECTION PRIMARY DISCHARGE AROUNDPERIMETEROFFOND, „'gR~~.`~~~';u ;.l•~'` 'i~'t~>~°^PJ-~ ~ AL AN ADDTTIONAI ANALV31& MUST BE BASE FOR „ ,i~ , , ~ ` ALL BERM SLOPES TO BE 1 1 1 " z O ' gs~l~~'';a;';'~\TABILI7EDWITHORAS5. -j W Q° ~(Q m PIPE ~ O,6R SLOPE MIN. ~r~,rr ~~~iE C :ia,~ 1~ ~ o• `a~ S1 SUBMITTED TO VERIFY t PERMANENT RISER _ _ .i. c : r~~~4i• „ 7HA WATER - .ti,,,;w,;,p,•,,,, , a ~>,f,, LEVEL CAN BE MAINTAINED. , , ,g~,%,,ty~,,,,,~•~;, , tX~" st~~n~.~~,iu ~s^;: , VVa." , Z ~ L' M ,,Y~ t'3;ii~ ~ ~~V4 n~ ,G,•a R ? PAINT A LINE ON THE RISER SEC y~ ti ~~';•,=m~~ ;"t'yt' 4;~; ~ d; ;'vo J,.; ,1• 110NAT MAX, 8EDIMENT LEVEL, ' ; y-,~,,' „~N.I ;,'rr . ~'i' ~ ~;~;;,ja;~~T",°;~;",~;~ x;n T,. ~~;n> LABEL ON RISER. . ;i 0 , r' ' N~~ ~ 1. After every significant runoff producing rainfall event and at least monthly, Z z z :~v,','v,'; °~t~:P,1"it4i ~ ;'3:1SL PE 'd l; t,y :•H,:pt, 2:13LOPE v)b;~`5 'l~ ",?':Y': E' r < v^' ;air °""~%P~'~ :1 ELOPE a. Inspect the wet detention basin system for sediment accumulations, erosion, trash ~ 0 ~ U ~ crcY aF caNCORD ~ ~,~~y. ,.L ' 'jai I PERMANENT STORMDRNNAGE accumulat(on, vegetated cover and general condition. ~ ,k, I ESMT,REOUIREDAROUNOBASIN b. Check and cleor the orifice of an obstructions such that the drawdown of the tam orar ~Z~ BEST MANA ,,.~:,;~:I~ ,:,~-.~~,.....~',X,. GEMENT P ,h, RACTICES : 'til AND A 15' PERMANENT Y p y ' Z ~ U. ~~cv ~ '~'sM I MAINTENANCEACCESBF.SMT, poai occurs within 2 to 5 da as desi ned. 1~ND DEYEIAPMENT ~ ° RIP RAP INLET ~C~"~~'1' r#,~; 1;:;.~,.~ ~ ' WET P ~ ~ REQUIRED TO BASINAND THROUGH ~ g ~ ~ C1 ~ ~ OND D ETAIL . S STANDARDS PROTECTIO ;;e ~ e OR INLET PIPE R13ER: . ~ PERMANENT POOL W 1 HOOD ' j,j;, ~.`~,+e~!` PROPERTYTOAPUBLICOR 2. Repair eroded areas immediately. Re-seed the embankment as necessary to maintain good ' t.~ ,{~~~,~q I PRIVATEACCESS. g ~~`~F;; ' vegetative cover, Mow vegetative cover on embankment to maintain a maximum hei ht of six a ~i s, SEDIMENT QR TRASH `+'K RACK - ~'a °Y ^ inches, remove trash as needed ~ ' iD I11~ 1 FOREBAY RAIN WITH3UGGE3TEAVAL WETPGND DESIGN DATA ~ BASIN # 1 BASIN # 2 ~ ' BARREL 3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) DRAINAGE AREA ~Q ";:r. a , 38 AC,1 20.87 AC,1 ~ quarterly to maintain proper functioning. z tq ' ~,•,y~, ,,;u~ 2:1 SLOPE OR Q =CIA CFS 0.64 ~ , a„"•• . , RETAININGWALL ' I 4. Remove woody vegetation not part of the approved plan along the dam embankment. i 1 2.75 CFS t , WETLAND PLANTING ON ± •I 10 FOOT MIN. 8:1 MAX, LITTORAE~' 1YR, 24 HR. STORAGE PROVIDED CF 51521 CF 1 0 ti> ';g;'' • uo , ; ',,~:;a'~ Q 5. Remove invasive and dead vegetation in the littoral shelf and replant as necessary. 75,344CF1 BNELFAROUNDPERIMETER .•".'f%. ~ ,~j%?v,,='"~:,>c4~'>,;;~:`"'•~~°;~; +~o,., -5)4,'4~i,1, ` ~~;~~~/EME crD 1N 6. Remove accumulated sediment from the wet detention basin system semi-annually or when u s,;° VALVE (IN BERM) the depth is reduced to 759 of the original design depth. Removed sediment shall be disposed Seal 5 WIDE TOP OF DAM (MIN.) EL 672.521 888.191 g - ,;;o;- ~ .<J~ ` ' I.. `•i5i,i~"'1 ':ISJ +•1 ~ .~~~,~,n,d:(:Ji~ ~(V~j~,, ~~~y• EMERGENCY SPILLWAY MUST BE of in an appropriate manner and shall be handled In a manner that will not adversely Impact BOTTOM 8 TOP DIMS FT, SEE PLAN SEE PLAN ' ''v~~'~,,,<' Jo ~ I LiNEDANDSTABILIZED(10'MINIMUM . , LENGTHJOPTIONAL:OUnEr water quality (i,e. stockpiling near a wet detention basin ar stream, etc.), ~ ~ SURFACE AREA OF PERMANENT SF 15,038 SF 1 24,048 3F 1 ~ WATER LEVEL '~'?,,.55+'.d,,>,.5?~<<~~r .v;; . ,.'.,i 1, .'~~2~~. ..1}i,~" ;r i'$'.~~;ts ~ ~ ~ STRUCTURE MAY BE DEBIGNEDAS 7, perform annual ins action of the and annual ins action re orts to be ke t b the owner ,5.2•=•,;; ~r 50 YEAR OVERFLOW IN LIEU OF P P ( P P P Y ,.r.:~ ;~J i EMERGENCY SPILLWAY + BOX = 40' EL. 672,001 BgB,pp 1 POND MAINTENANCE INFORMATION \ ' `~'~`f%%'`;~.~a"'~~"` _ - EMERGENCY3PIU.WAY. Prior t0 InBpeCtiOn natiflCatlOn mUSt be give t0 Storm Writer SerV1Ce8. MUST BE POSTED AT SITE, " ' °WETLAND PLANTIN 1 YR. ORIFICE IN. 3.5" 0, INV. EL 888.001 4" 0, INV. EL. 882.001 10 FOOT MIN,1o:1 I ~ 8, Post pond maintenance and contact information permanently to the back of the dumpster NOTES SHELF AROUND PE DETENTION STORAGE CF 114,490 CFt TO EL. 672.001 183,435 CF 1 TO EL 688,001 oF`~`A"ooT°MIN io ~noRAL wail for reference. SHELF AROUND PERIMETER 304 CF1 1' WETLAND PLANT SPECIFICATIONS H.A.R,P, SELECTI0NAN0 PLANnNG FOREBAY STORAGE CF 10, (MIN. 20.00% OF t5,088 CF 1(MIN. 20.00;6 OF PERMANENT POOL VOL,) PERMANENT POOL VOL.) GUIDE FOR AQUATIC AND WETLAND PLANTS IN TIE PIEDMONT REGION OF NORTHCAROUNA MAIN BAY STORAGE CF 41,217CF1 60,278 CF 1 - 2. ASTORMDRAINAGEEA$EMENT(SDE)MUST SCHEMATIC BOTTOM ELEV EL 880.001 878.E 3 ENCOMPASS THE WATER QUALITY FACILITY BMP). SCHEMATIC PLAN VIEW. SEE SHT,1 FOR EXACT AN EASEMENT MUST BE SHOWN 10 FEET FROM TOP MAX, SEDIMENT DEPTH FC. 1.75' 1 1,75' 1 OF BERM OR 10 FEET FROM TOE OF SLOPE FOR THE FOR EXACT LOCATION, FACILITY'S EMBANKMENT {BERM), WHICHEVER IS GREATER, PERMANENT WATER LEVEL EL 888,001 882.001 25' 3, AN ACCESS MUST BE 8HOWN TO PROVIDE EGRESS FOR PERMANENT WATER DEPTH FI', 8' 8' REV1810NS MAINTENANCE (VIA EASEMENT OR PUBLIC RIGHTOF WAY). NO, DAZE DESCRIPTION VEGETATIVE SHELF EL. 10' WIDE - EL. 685.00 TO 886 001 12' WIDE • EL. 682.00 TO 683.001 4. ALL STORM DRAIN LEADING TO AND FROM FACILITY SHALL 36"PIPE, 36 LF 1 36"PIPE, 127 LF 1 HAVE APPROPRIATE STORM DRAINAGE EASEMENTS {SDE). DISCHARGE PIPE DlA.ILNGTH, (FOR SI o ANTI -SEEP COLLARS FT. 6' X B' MIN. • 2 EACH 8' X 8' MIN. • 2 EACH 5• BENCHMARK AND CLEANOUT DEPTH REFERENCED ON (FOR SECTION VI EW REFER TO 20.31 B) ~ ~ ~ ~ 3 PLAN FOR FOREBAY. POND DRAIN SIZE IN.ILNGTH. 8" DIP ,148 LF 1 8"DIP,102 LF 1 0 Z v RETAINING WALL UPSTREAM HT.1LF 5' HIGH 1 5' HIGH 1, 378 LF 1 CITY 4F CONCORD BEST MANAGEMENT PR RETAINING WALL DOWNSTREAM HT,1LF 539 LF 1 CONTINUOUS UP AND DOWN NONE MENT PRACTICES o ~ IrAND DL~VELOPMENT LEVEL SPREADER DiAJLNGTH 12" fD - 56LF 1 NONE WET PGN D POND _ o a STANDARDS v s 2 5 PONTEDERIA Z (Y u SPLITTER BOX wN ~ -N CORDATA (2.5' O.C.) 11 IRIS ~ o W I--r-----------r--I I I I I x I I I I o I I I I W I--° W PSEUDACORUS ~ ~C W 10 I I I ~ SPUTTER BOX 5 SCIRPUS VALIDUS ~4' O.C.) Z ~ 5 ~ I I I I i I / v i I L _ J LEVEL SPREADER TOP EL885. / t1 LEVEL SPREADER 3' O.C. u' ~ ~ ~ ( ~ li ~ { I I I AND fXl44FA (j 38"PIPE I I a I I I I 0.5' S0't LENGTH ~ 130' MAX. LENGTH I ( INFLOW f (STEPS ~ ~ I I I I ~ , 1~,\ v I I j LEVEL SPREADER 5 MIN. INV. 883251 ~ ~``w~~~i INV, 883261 a I LEVEL SPREADER INV, 883.7~Si^.~~~ 0~ o~ i - I I Z ? F' i- v I r SEGTION VIEW 3 I I y 3 I , r 0.5' ~ ~ W I 3G PIPE a ~ _ L_~ INFLOW I N I NG WALL T 3 TYPICAL PLANTING DETAIL ~ p~ ~o } I O l_________ __.L___...,.•.___..._._J FOR THE LITTORAL SHELF ~ W 03 o LAN VIEW NED BYA ~ ~ iv 0 4' 'MK. / 57 WASHED 8T0lN? MqH FA.TER FABRIC, GROUT STONE AT ~o n OU1LEt PIPE TA KEEP M PUKE RAL ENGR° AND a. ui _J PART OF ~ THIS PLAN. ~ Q w CRgILAR GRATE N19 IMTN MH PRAME o. di, EL PLUS 6" .tl TOP OF DAM, 673.aat as a~ ~ AIAARI ~ 1 - SDTTOM EL 673.DOt v ~ BAAIN + Z - BASSI ~ 1 - 60 111 w6E - 072.4kk TOP OF SLAB, 613.421 a ~ o BAADI f 2 - 00 YR. MSE - eee.ett 3 BA81N 1 - iD YR. NBE - 671.7Qt ' 3 BASIN / 1 - THROAT EL 670.13 BASiN / 2 - 16 YII. NDE - 667.67f WGF ' B TT, SLAB, 672.52 d a BAS!N / 2 THADAT EL 666,001 EM. SPILLWAY, IN o a,+r. 67Da~1 2- 3, MEAL, INV. 6A6.10! i. SPILLWAY, INV, 672Aat W~f 1' MIN. BOX OPEN ON ALL 4 SIDES SIEPs ~ FROM THROAT TO LID, WITH SPLITTER BOX Drawn By 0 10 YR. 2' WIDE WEIR, I MIN. 6" SQ" PEDESTALS. BASw ~ 1- rx. N!f-670.06 2' WIDE WEIR, INV. 670.13 01/07108 3 BAAIN ~ Z-1YR. w$E-eBay~ a ` Da#e 0 3.5"01 a 3.5°01 YR, 24 NR. ReViSIOnS STOf~tl STOf~tI OUTLET - 01117108 • LEVEL PREAD n INV, 86E ~ u~v 666.001 PERMANENT WATER LEVEL 685.OOt INV, 866.003 LEVEL 686.003 36° N BASIN ~ 2 - 4•r ORFTCE. M, oe2,oDt a 1 WATER SURFACE ELEVATION ~eoo# MH FRAWE m BA6N+ ~ 2 PERMANENT WATER suaFACE EtEVAnoN eezoot a AND tXriER MINIM M WALL THK, = E" ~ r~Fr~ipE 1.0 MIN. ~ 0 . 5' MIN, J o BA51N 136' RCP OUTLET PIPE INV 660.003 F BASIN + 2 RCP OUTLET PIPE INV. e76.00t ~ X rn ~ 0 Z ~ ~ I m W BOX INV.663.25t z rn oisw i ~ _ ~ w _ _ a ~ . ~ INVERT OF POND t~0.00t Loaf ~ ~ ~ ~ r n ELEVATION A-A 4 ~ W / y, Project Number 0 246.094 (3DETENTION BOX o NIS i.~OU pL AEI MEW L.._Sllr9. 6 SECTION THRU BASIN # 1 Sheet of d CE N 2 2 Q ri