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HomeMy WebLinkAboutSDP199700096 Plan - Approved Erosion Control Plan 1997-08-05 -- -- - - - _- ____ ,.. --- -- --- - --- _____ _ . _ -- ____ . _ -- - . - ---; - --- -- -- -. � - -____-- -- ��, . _ - - -- -- , ; , .. , I , , . , c �'' ' ' . . - - , �' -�` ,. . � .;. . .,.. _. . , ; .. , , t; _r . ... . � � .. � {,_. . . ,.__ `,- . , j . . ;;. ,' ,:i � . � . � . ; , � '•��, � ,, . , i � ;;, i i . [� ' .� i _ , • `: I 't. C . �{ , .. . � , , . � i- . . I' _ � � �! ' � ':. � � � � �,. � ,�� ' � . � � � .. . , .� �� FINAJ[� SITE J�LAN j ` � i i= 3 ., , . . � I " : � G �� . - � ` � , : �; . � i � , .�y� I . , � . , . . � � .. ! ' ..:i�y . , . . I � ` ' . .. �' . ' . . . 1.� �", . r . . ' I n . k.� . .. . :�. �� 4 I : . . � . . . . . . . ... . . . �� .. � . . . . P II ' . .V � � . . ' . ' .�� ` . i . . . �. l . . � . , _�` � .. � . ' . . . � � ' I3 �$�,. i_ � ' � � . i ; � , .. . ,. � . I . _. ,- _ . _. f:�.. .. _ . . _ _.. . , � _ _ . ,; , . ,_ _ , . .. ;:�t . . . . ... , . . _..... . __ . 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LeV✓IS Mnl p _ . p � �: p ]� , __ . ,�,�'s� �i / ._-�'7 i ,, Iifii`i � .- . * - '' �' i .�....� � � . '_ .. . .. 1 !;� ' / /� -�-� - T)` �p I ., � , . . .. � � 1 1 ��� `. =- �� ! '� w! �:� - � _ . � ' . . � � • - �l �� NW ' . - . • � . � , - � . � _ . ,` , . - � � 4 -��_7�.� ; � �-,� �� -- ��o . 304 14t S . ; , , : , . - , � - _ . . 1 _, . _ . 'F % .',� �: '' ,� �4�pi�� /����1�j� �1'' j'�l !F• �'/,�v\ _ - _ ,, �. _� > / �l`" �� u� �� ,.lJ 7 t �� , '� le ir inil 22903 Handica S aces: 5 t �; , �� � �-�;���� � �r � /� � �� 4. .Yas . . Chlrlottesvil , V , \ r/ , , � . I ., � : � P P ; , t ,� :��, ` 1• :rf ... �r4. �, ,.y . �.�. _ _ _ - . _ . _ . � � ` � , �, � ,. e�.f�r.so.n'e, ,.;• I �p�L/,�, �.�� _. __ __ _ - r � , `� . n_�. '.;!/ \``:�r����� �1�,(/ � '�` -�.�Lr?_� e gi,, i��,�,� ,;: � (3 interior and 2 C�IC lOI'� . . . . . .i II / � �i:l l� �-����I �`i-�� �r"_ ;T'` ����`E�./;��i�i.'� ., . . . . . �TS _ . t �'�.. _ . . "_ � � tl `�f (.�\ ,�L ,1• '�$, � .��,� , �\\�,;Ys�;4y . �, . .�',�/: /��, >. , .. .� �-. ,� J ,� ,'���� P�'. . :`� .:: `-� l� r� c, m� �� ,--'\��•. � 1_ ? a�,:������ 'i;.�'� ,� 3. Pro ert Idenlification: Tax Map 60, Parcel 4008, D13 1:563,,PG .46, r . ` / { --p �•��i � �,-�-==-'l �� F�--,-.=�.s��.�.,-�= p y Provided: 108 s aces S.��Jeck 51 exterior)_ `� � � , +: --...� ��ots���to�y ��� . _, 'd �, •��«o-�..,.- , , A• _ p � ' , � . , . � `J �f --_ �(�,.�,� _�/�����j/P� ,I;,.., s���t,r/�c�=�/ �� /, ��.i, � DT3 1075, PG 259 Plat, t.ot SC Un�vers�ly He�ghts. . �`' .. . ' . i , :° a �`.�'L �,!'� 1..,1�.��f�� ��F��'Tircti '�� �Sta�um�rl � l,�J (:� �` � f � _ , . . ' , , . lI / �S ,., , . .:: , . , . ,�, r� ,;�V`��,�� � .�r-.� .i..� ,; ;rr�/,r`\ ;�� � �/ ��, � __ _ _ _ . This site is not located in a�'eservoir w�tershed. ', � .� (i �.. _J _ I � • : I , . ._ .. , ., � ��� _> . : _ - __ . . , ; . ; r .,. .. . �t ,.: ; , . _. > - - - -_ �nin , -R-1S Aii• or��m act Are1 Overla District . ,�. . , - , � . �:: 4. Zo �• � PP P Y . T . - ; k � Sca1e: .�1"_.200�' I� ; - 16. Proposed impervious cover,'.`1.28 acres (SS,C36 s�j. - . + � , .; - - � �. i k. S. Planned Land Use; Residential Apartments and Of�ce � `. � , -, ` � ,, roR�rTr � � �. . e to Ue l��ndsc p d �n � ance w � 1 � � t�._ . 17 Sit a e ' 1c��rd ith County standards. ; 6. Tract Size: .4.958 acres , ,., ' t' � ' :: - • ` l 8. Paved parking and circulatinn areas: 0.66 acres (28932 sf�. � . � � ' � 7. Jack Joitetc M�gisterill District, Albem�rle County, Virginia . ' i�. ; . _ y., l9, Proposed recreation area: D.28 acres (12232 s.f.- Proposed). r e and To o ra hic inf'orn�ation based on a,surve re- � �� Count re uired Recreatio?i Area: 4.'�58 acres x 0.05= l0 799 s.f. Bound�r Ac ea Y P , . s. .. , P � P Y �l � � Y . � � _ � , _ � ``. nared.by Kirk Hughes and Associates, dated June 4, 1989. � 1�, _ � ; • . . � � � , 2�. Outdoor lighting will be p�'�vided and directed towards the interior of � • ° �: " � , ' - Mark USGS ' . the site and awa from ad �cent ro erties and roadwa s - SHEET IND�X; : ; � SIGNA;TUR� PANELS �. ��n��, � � . �. y � :.. n � y�� ,_°' W�, . _� s. . haracter of Mark: Standard Disk , . � • � _ . -- . � � . �. � •� , : , � . � � : . E• �' � µ IDes� naliorr: Y 345 Reset 1959 21: .Trash receptacles and recyEling will be interior. � I - Tlevation: 550;47 � ' � C0.00 ] of 21 � Cover Sheet , � , � � �` T�etailed Description: � 22. Lighting spillover onto public r�ads aiid properties zoned as residential � 00 2 of 21 --i Ce�leral Site Notes• � � I.O rriile west along IJ.S.HighW�ty 2S0 from the junction of U.S.High- , or rural are�s shall not,exceed one-ha�f foot candle. � , C 1. :;, � � :;� , '. �� . Department of Planning �vay 29 at the north��vest edge of'Charlottesville, 23 feet southwest of the ,- _ . . I C 1.]0 3 of 21 Toj�o�raphic Suivey " 23. The Albemarle Count Bciard of Su ervisors at its Se tem�er 4 1996: , ; � . , edge of pavemer5t of U.S. Highway 250, 24 feet southeast of the center , y t p p . i � � C2.00 4 of 21 �,-,� Demolitiot� Plan , of 1 grave] ro�td ]eading so�thwest to (he Commom��ealth Motor Court, »>���ng granted a) Wa�ver of Crilicai Slopes Requirements, and b) , ''�, ��'� �� C3.00 5 of 2l .� Site Plan. �,� , �: , Il55 feet northeast of the noriheast corner of brick rest��urant �tnd gift �, � - '' � feet southeast of a culvert � Waiver of Access Aisle C��ades, nol�to exceed 12�. ; ,. . _ . . ; , ' C4.00 G of 21 � . Layout Plari ; : . ' Depar(ment of rngiiieering : . shop. I.Q:fciot southwest of a brick wall, 35 . , - `. C5.00 7 of 21 ;. Ulility Profiles . .� ` ,` under U.S.Highw�y 250, l 10 feet southeasi of the south rail of the C & I i , ' � � CS ]0 8 of 2] Utilit Prof les '� , ' - O RR Tracks, 14 feet northeast of,a manhole on gas line, 5 feet northeast r �Qy�Q ���$��M G�3NT p � • Y, ,� _ „ ` ; � of A C. 8c G:S. Witness sign, and set in the top of a concrete post ���- Alb�marld����n�roV���, r �AN ' � C5.20 9 of 2l Utility Profile$ . . Department of 7�ning . � � - ' , . � I= , . � , - . , ., t . C6.00 l0 of 2] � Site T�etails ` . ' : . , . _ , ,; 10. . Proposed Use: , �1 "•� p�r,ty E � he � ,, ` , . , t - � p . , . , ' C6.10: l l of 21 � 'Site Det�ils` . ` ; ` " ' .; - � , . , � •'• Residential Apartments: 7Q Tot�1 . '� , /z ,�.����n �rtng p�.artmen� , � �a�; e ' ' C6.20 ]2 of 2l , �Sife Delails� � ; �. � : . G4-1 liedroom units 1nd 6-2,bedroom units � T . , Pl��j,�� - . �..,/,,.�,�ss� ... . �` /11bemarle Count 'Scrvice ntith�rit '` � - � 54,960 s = 1.2C acres . ' ' �`"'' . ', � .C7.00. 13�of 21 l�tainage Divides y Y . , t: � � , ,. ,i -�--,.�� . , , , - . , r, .. �►Q`fi�t�-�.....���y� a E_G , C7.]0. I 4 of 21 � . Slormwater�alcs. , . � . . , � . ,, , .l :,; ,, i . , � 1 L Gross Residenti�l Density: 14.1 dwelling units/acre .. , � � � 7 , � ;C8.00 l 5 of 2l ;,�.Pl��se l �,& S Plan ; :; \ . : ; Y,. � : ; � ;C8.00A 16 of 2l n�� &�S Plan-:' : ,: . Virgini� Depart�i�cnl of Tlealth ` 12. Open Space: 3.67 acres . "` � . . . . _. � . .�, _ , , . , . _ . � - - � _.- - - -- _ . __ . ___ T _ . , � - ' - , � _ _ C8.I 0 . ]7 of 21 x�& S Details" � � - '` �; . : : , , ,,.. . . w , . . ;, ` �l ' C8.20 ,� 18 of 21, �`E��i S Narrative �": � , ' ' , . ;: ding Height is 46.00'. . +�; i : 3. Izounded Buil �� � � � ,-, � , ,. , . , � ' 7.63'� Mean roof H t. vetween eaves and rid e of able ; ; �,; 1 C8.30 - -19 of 21�. "� & S Ke . . . 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".,��.t -., .... . . . . , . . . .� . . - . .. . .. . . '� � . STORM ROUTING - 2 Year " � . �'' STORM ROUTItJG - 10 Year � �, . � � - .� P D vel � ent C n i ion ine #'!11 � - . Post Develoriment Condition Inine 11.11 . ` • , � �� . : y_ , . --�__._�_�------ ----._ . � °. ::�..��,..*��....�.:...�:..:��.:.�..:«.....*�..��.�...�.f.�..�....�,.«�.....+.� . ,.....«««.�......«..�.�.�.�.....«�..�..�.f..�..�.�.k..�...�.....�...�.�.�*��.+� : R M R 0 UTIN G S U M M A RY . ; � � w+ PROJECT: 1'IPE /1 2 r STORM *� DATE: 11�7/199G� � ROUT VER5IO1J,5.4 •+ PROJT_CT: rirr /1'� l0yr STORM �• DATE: x�,�,����. . � ,. . , S kylin e C o u rt o n L ewis M o u n t ain � � � •' ' . ` • nouT vensrow �.a , v ; ' : _ . . . � �ss*t►+Rar�*�����►�a*rs�►�sa��k��ssa�s�r�+s�r�rt�a*�,��f��+*��aa*k►++�a�ssa*�a� ,� ' ' �*t���*��►r���**���*�►���r����*����if��**►���r��si*��arfsi*+�*a�«*+�+►#rf�f+�♦ . . -- - - , ,,, . , . _ , , � � . .. , ,,,,.., . _ .- , , . . , . . . . . Albemarle County, Virginia � ,, . '� �� (Types: 1:Weir; 2:Pipe; 9:Riser) Structure 1 (Typess 1:WeiY; 2:Pipe; ]:Riser} Structure � - . : --,�--'----- . , : TH� �i�X 1 " � ttis�r ---- - , i PEAK FLOWS GOMPANY 1: TYP� 1: Type • ]:`Riser , , . . Weir: 2: rleva�ion (ft) . O.00 Weir: 2: Tlevation (ft} O.oO ,`�+• ' - � , . . .. ,, �.. - n ]: Length (ft) 0.00 > �"' ' . � , �: Length �ee� o.00 STO.RMWATER MANAGEMENT CALCULATIONS : . ����x Ar�t`.�`� � ,. � 4: CoePficient 0.00 . � � ' 4: Coefficient 0 Ob , .: . � ' , . _ Predevelonment Condition: ,_ Riser: 5: Elevation (ft) IOA.7o . .: � • Riser: 5: Elevatiion (ft) 104.70 ' � ' - . , r ':� . G: D�ameter (in) 1II.0� � �• , . - . . , � . 7: oritice Elevatioh (ft} 100.00 .. . G: Diameter (in) i8.o0 . - . . -= . , . . " . , 220 E'as t HlrJh Strec t . ts• orifice Diameter in 4.00 '" 7: OriEice Elevation (ft) 100.00 ,' "' 2 veBC pG'2k f�OVN : 8.04 efs GherlottesvdJe • VI-ghia � ( � ' II: Orifice Diameter (in) 4.00 `" ' . • � . , " . 229b2 C � 71 . �: Orifice Elevation �eL� o.00 � - � PEAK FLOWS 70: orifice Diameter (in) 0.00 9: Orifice Elevation (tt•} O.00 . : � 8D9 243 31 ,. ��: OriEice L••levat-ion crc:� o.00 �o: orifice Diameter (in) o.00 � � � Predevelo�ment Cbndition (on site) � - 10 year peak ffmw :� 10.56 cfs . : : . , 11: Orifice Elevation (ft) 0.00 � � � . ]2: 02-iLice DiameL-eY (in) 0.00 • ' , Pipe: 1�: Invert- Elevat•ion (ft•} �100.00 12: Orifice Dia,met•er (in) 0.00 . • � , . - t" ' ' 14: Diameter (in) 15.00 P1pe: 17: Invert E]ev�ation (ft) loo.00 . . • ^ . ,. � . '" ;' . 14: Diameter (im} ' 15.00 15: OriCice DiameteY (in) 15.00 ` 15: Orifice Diavneter (in) 15.00 � Ar�-'a NllfibBr'� , C Area (ac) C� , , 1G: Length (f�) 100.00 • iG: Length (ft) 100.00 t • ___�-_�� ' �. -......._... --�-_-�..� _---------- � . 17: Manhing's n 0.011 17: Manninq�s n 0.01] . in: s�o � rt rt o.oso � , . i . . EAK FLOWS (combined) . ; . P ( / ) , in: slope �rtje�r� o.oso _ � _ - - ----- , 1 0 300 4 960 1 488 ' � � , __�_______ ` _ ___ ___ ____ _ , evelopment Condition: � 19: rntrance Loss Coefticient o.5 P , 19: Entrance Loss Coefticient 0.5 ` " - . surtace: zo: Ynitial Elevation (ft) l00.0o r, surtace: 20: Initial �lewation (i't) �oo.00 " ' Weltfh��d Totals:��' � 0. 300 4 . 960 ' 1. 488 ' s � Post D , Storage Pipe Characteristics: Doanstream�Inverti �]evation (ftj .. 100.20 ! - ' 4i"* 1 • , � ' - . ' � � z ' �L-orago Pipe Characterist�ics: Downstream Invert Elevat-ion (ft) : 100.20 Time��Of concentratiion= 5 min � boanstream Manhole Area (sq ft).� 20.00 � - � Upstream Invert Elevat-ion (ft) r 100.70 ' Do4rnstream Manhole Area (sq ft) ., ; 20.00 . , UpsLream Manhole Area (sq ft) :''" � 24.00 �s Upstiream 7nvert ElevaCion (ft) . 100.70 , ���' 2 Yeaf ne8k f�OW : 6.85 cfs �` �� G0.0o � j Upstream Manfiole Area'(sq ft) : ,, 24.00 � ' � a . Pipe otameter (in) :` • ;.: '� ; '.;; Pipe oiameter (in) : , ; ' � ' �o.00�;;: , Period '` Tntensity Peak Flow�: .� Len L-h ft : , ,, 100.00 � g h � � a ',,; f . e ( ) ,, . . .. '.• L � t et : (Y � / ( �S) . 10 year peak flow 8.73 cfs , . ioo.00 e �s)' in hr) c � , . , _ ,., ' .. . , r --- ;=- � ------- - ----- ' . . , ConL•rol: RW = Riser acting as a weir - • � • . Control: . hW � Riser acting as a weir ' � r ` � ' ' Ro = Riser actinq as an orifice • 2 �1 5. 40 8. 04 " RO - Riser act:ing ns an orifice 5 6. 35 9 . 45 ," . rr d Ilorizontal pipe �n inlet �ontroi Px Q llorizontal �i�� in i���ti �onrroi In summary, the c�mbinatio�n of underground stormwater detention pipes � PO = llorizontal pi�� in o�ti�ti conL-rol � � p0 a }lorizontal pipe in oUti�ti �o„troi lo ; 7 . 10 �0. 5� reduces post development stbrmwater runoff rates for the two- and ten year � � 25 ;7 . 8 . b0 il. 90" storm occurrence intervals Ge1ow those ex erienced rior to develo ment, Time 7ntlow Riser . Tot•al iilev Storage - � Time Snflow Riser Total Elev SLorage , ' ` ' (min} (cfs) (cfs) (cfs) (ft) (cu. ft) ' ' ' ', th p , ,' ;'' 50 � 8 90 13 24 , (min) (cts) (cPs) (cfs) (ft) (cu it) , ° ioo �` 9 . 60 14 . 28 us satisfyinc� requirements �for on-site stormwater management. ------------------------------------------------ . . ---------------------------------------------- o.o o.00 o.o o.00 ioo.00 o.00 o.o o.00 - o.o- o.00 ioo.00 �o.00 ' ' ` � 1.0 O.GII 0.2 0.22 100.4G 12.95 l.b 0.90 0.2 0.24 100.52 19.53 � • . : 1 2.0 1.�G 0.� O.JO 100.7] ' S8.]] 2.0 1.79 0.3 0.�9 - 100.II1 II1.93 . � . PE�K F�-�WS � . �.0 2.04 0.4 0.17 101.00 14?..71 3.0 2.G9 0.4 0.41 101.14 19G.54 � � 4.0 2.72 0.4 0.45 1D1.�1 2G2.2G �, 4.0 3.58 0.5 0.50 101.5] . 958.�0 �� ' � Post Develo�ment �ondition (on site a�rea not detained) 5.0 9.40 0.5 0.5� 107.G5 :. 417.55 - , 5.0 A.4 8 0 G � � . '`� � G.0 3.00 0.G 0.59 101.98 Ei7G.�0 . 0.�9 101.9G, �G7.99 . �' • ,, G.0 3.94 0.7 0.G7 � 102.�7 777,G7 DR/JtJ/,GE RUNOFF RAJNFALI. TIMEO� RUNOfF R 7.0 2.59 O.G O.G4 102.27 702.GG ' 7.0 �.40 0.7 0.7J 102.�0 954,91 �iY'L'a Number i, . ' C 1irL'� �<3C� CA ' 1YPE TYf'E /�EA COffF. i, c X A INTENSITY COtJCENT. INCREM /vCQ1M PIPEDIA SLO('E N10W. {'• . n.o 2.n� o.n o.�a ioz.�7 i,o��.fz _---------- '' ,/ ---�-- --------- --------- 5 fr r��t nccur, i,o �n/hr T� min Q�o �5 Q�o ds D m S 96 n Q ds � ' 8.0 2.18 0.7 O.GtS 102.42 II04.79 � 9.0 1.77 0.7 0.70 102.5G BIIO.G7 9,0 2.J9 O,Fi O.II1 ]0�.17 1 910.�0 FROM TO onU�g PIPE (AC7iE� t � � 10.0 1.3'I y. 0,7 0.72 102.GG 9]2.03 ` 1 � � 0. 320 3 . 140 1. 005 R N io.o �.eo o.n o.e� �03.31: 1,2oe.o1 CPCL 0.24 0.90 . '0.22 0.22 7,10 5 1.53 1.53 12 2.00 0.013 S.OS - I1.0 0.9G 0.7 0.79 102.71 95D.71 + 11.0 1.2G 0.9 O.FlS ]07.40 1 J91.]8 -----�---- ]2.0 o.ss o.7 o.7s �o2.�i �s�.7o ' -----�----------- ------ --- .----- DI-7 . 12.0 0.72 0.9 O.BS 10�.41 1,]�9.G9 � , 4 ]3.0 0.14 0.7 0.72 IO2.GG 9�5.92 7�,0 0.79 O.B O.E15 109.]7 1,71G.�� Weighted Totals:� .' �. 32� `3 . 14� !�"�� 1. ��rJ 4 DI-7 � � � ; • • CMP 0.I 4 0.65 ;0.09 0.31 7.10 5 0.65 2.f 8 48 0.50 0.013 101.85 � . ' � � Time of �concentration= 5 min 3 MH-I �-- STORM ROUTING - 10 Year �� 3 MH-1 � W , ^ STORM ROUTING - 2 Year , 'E � ' � � i e f1.2 � Post Develoriment Condition (nine �/21 Period� � zntensity Peak F1oW . RCPCLN o.00 o.00 ;o.o0 0.31 7,10 5 0.00 2.ia is 1,2.�0.0�3 2s,� V ) Post Develonment Condition (n o ) _� _ .__ ,� = MH-I 'OJ2 cfs ma�dmum release from deterrt ' _ � . �_ ._�_ (years) . -. (in/hr) {cfs) '' 3h 3� MH-I - ^.. � ' +i�+�+��r�faa+++i+�#+f*►+��++�►�aa�►f�+iar+it+f�++�,�f�a+r+►r��++si��i�►►�►aas�♦ � +rr�f►���s►a�*�+f�s�s++*�►+►r�►rr++�t�++►�a►++��+���+stts+sar�rafas�+►t►a►ar►is i r � „ • ` i ROUT VFI2S7011 fi.4 *+ PROJrCT: PIPE /2 10 Y STORM *+ DATT: 11 7 199G* s ROUT VFRS70N 5.4 ** PROJECT: PSPE /2, 2yr ;TORM ++ bl�TT'• ]1/7/199G ,; r y � � , --- ,- ��,--`�.`---- �-`�`-`-•.. � r .- RCPCLN �.� . �.� �0.� �,6� �.�� S �.� �,31 �S ` �2.•� �.0�3 23.�1 : - si*�+��4:+�i�*��a��+��t+�+�+s�*�:i��i:,r����ii�is**+�*+��i+*s�t���+i+��tss���i• iss*s�����*►x�**��r���►���*�«r*ar►*�s*����rs���s��+���►if+r�s►��i���i*��:iias• 2 �'�.j - 5. 40 5. 43 ' 2 DI-3B E z � _- �; , ` __ , . , Z g . T es• �.weir 2.Pi e � Riser structure 1 �� 6. 35. 6. 38 � : � ('rypes: l:Weir; 2:Pipe; ]:Riser) struceure 1 ,' ( YP % ' P , ) 5 , RCPCLN 016 040 Od 068 710 5 0.45 �{-a 15 . 0.013 17.26 z ,.. ,. r� �e . . •... . DI-3 7 I0 .�.��. . ---------__ ----------- 10 � ' 7. 10 .7. 13 . � . � , • T e �:. Riser . . , 0. . . . �. � � � i 1: T e �: Riser. 1: yr ! I MH-I Q 2 5 �: 8. 0 0 II . 0 4 r.-- ry yp we1r: ?.: Elevation (ft) o.00 I MH-I ,,,� i . weir: 2: F:levation (fL) O.00 . �_� �: Length (Lt) o.o0 50 ?� • 8 . 90 8 . 94 Ex.RCP 0.00 0.00 �0.00 0.98 7.10 5 0.00 � a,a 15 10.69 0.013 2b•9'� O LL �: t,enqth (tt) o.00 -. 100 9 . G0 9 . 65 6c.A Ex.DI ,� � 4: Coefficient 0.00 , 4: Coefficient 0.00 �,;` Riser: 5: ElevaLion (ft} 10].50 • ' 1� � , Riser: 5: Elevation (ft) 103.50 ! ' . G: Diameter (in) In.Oo x ' �0 DI-3h � �' G: Diameter (in) 18.00 ' � - 7: Orifice Clevaetion (ft) 100.00 �'�: � � � � l " z' � � 7: orif.ice Elevation (it) �oo.00 � � &: orificc Diameter (in) 4.00 +� � , RCPCLN 0.26 0.65 ,:�.17 0.17 7,10 5 1.20 1.20 12 I.00 0.013 3.57 � ,� � n: orifice �iameter (in) 4.00 . � _ 9: oriCice Eleva�tion (ft) 0.00 ` 9 DI-3A , , , 9: ori[ice elevat•3on (tt) o.00 ' -s� � '` 70: Orifi.ce biam�ter (in) 0.00 • PEAK F�"�WS �:� _ • 9 DI•3A • � 10: Orifice Diameter (in) 0.00 . . ' � � ,// ,, . �y �'�t ��: orifice �i����tiio►, tc o.00 Post Develonment C►:�,ndition (on site area detained in nine #!11 � r � �'-� � ' �=' li: oritice Elovation (ft) o.00 /`;% � � RCPCLN 0.08 0.68 �0.05 m.22 7.10 S 0.39 1.59 15 13.51 0.013 23.81 �� � _ - , . : -� ' 12: OYl.fice Diameter (in) 0.00 � � ' 12: Orifice Diamcter (in) 0.00 !��� 1 , ' � ��.' Pipe: 1]:. Invert Elevation (ft) 100.2o y �E� r;� ,;^, -M '+ j 8 DI-38 � '� " ' �`.' Pi e -<,." 13: Invcrt Elevation (ft} 100.20 ,,.,, � n.• , � �:. , . ( ) �, � ;` ' `,. C -•, J�rea (ac) CA � '•. �„ti t. � 8 DI-3B � � �• 14• Diameter in 1� oo Area NUlflb' ., ` . . 14. Diameter (in) 1�.00 . �. � ;,;, � --- _- �* � .' CMP 0.07 0.63 . �0.04 0.27 7.10 5 1.85 .. � � ,. ';,'` , � � 1�. orifice Diameter (in) ]�.00 ---_-- °�q,�l -- ,�- -------- - . � 031 1.90 48 0.50 0.013 10 , .� F.. • 1.,: Orifice Diameter (in) 1.,.00 :�, ' , _ _ _ �� - i� �p,�._.,x,.. 1G: Lengt-h (Et) 100.00 $ �; . ^� • _;�it.; i�: �,eng�h (ft) 100.oo � 1� � � � 7 DI-3B 0.70 cfs mai6mum release from deteM. � . , ��: Manning s n o.o�� °�' 0 650, 0 9.70 �. `0 630 7 DI-36 � _ r' 17: Nannin s n o.013 r '�.. O �. i : • ,_' ,^ � • • Slo Q ft fL 0 OSO ---- �': --�---- ----- �. . .- . e g t ft o.050 ,.i:._� � 1n. T> ( / ") . ---.--- ---� . � .,x : ---- -r------.- :. RCPCLN 0.06 O.bb `i�.04 'U30 7.10 5 0.26 2.15 IS 3.69 0.013 12.44 T ' . � ; ,•!.' �a.,� lti. Slop (f / ) � 19: EnLrnnce Loss Coeffic�ent o.5 , � ,,, �" �'' ""�� O _ ,��_ .'. 19: F_ntrance I,oss Coafficient 0.� � ! � . �� . ' s'urca��: 20: Initial �levation- [t ioo.zo � , � We1gt�ted Tot�j a. •` 0. 650� 0 �970 . , 0. 630�s,'� '' SurCace: 20: Initial Elevation (ft) 100.20 1 � � _ ` � t... . . � .. '. - .� �+'-L �+ `, ,, .- , . , U . . . . , . . (�� . .¢_ .t .,. .. , . I MH-I _ -. , • ....- ;+. 'tir � . : : , � . . ���.. :f� t.n: .� .-' •' .... . � Y .1. '� . .:.. ' ,. � ', . ' . � �� - p . . _ . . .. - .. _- _ �,�e.�4 ���'',f. . . + � � V ... :.: . . . . . � . , . .. . -,. . .....,. � .-.. . . . ... .��� , , . � ' ' ea verL evatibn ft : 100.20 �' � �tora e Pi e Charact-eristi�cs• bot+nstream Invert Elevatlon Ct 300.20 •s+ 15 frombuldin . Stora e Pi e,Characteristics: Downstr. m 7n E1 ( ) , : . � - n,. �.�,.. ' _ � � '� T�fi�� O�' COi'ICe]'I�ra�1017= 5 lil�rl g ,., 1 • �:' g°' � � �own�tream Manhole nrea (sq ft} : zo.00 �k �� nownstream Manho]e Area (sq Lt) : ;. 20.00 , � : ' RCPCL IV 0.24 0.90 j0.22 0.22 7.10 5 1.53 1.53 12 2.00 0.013 5.05 , � ' . I ' '"' � "' Upstream TnveYt Elevation (ft) : 100.50 ' ��' Upstream Tnvert Elevation (ft) : 100.50 «r� ^`�., 14 DI-3A l 1 � ,..�. . . .. . . . ; . . , � . . . • U stream Manhole Area . U ..tream Manhole l�rea S rt � . Intensi� Peak �ZOW : . W � ! - n (,q ft� • 2ti.00 y ;. .� • n� ( 4 , ��:• :: za.00 � • �; Period Y ,; � . 14 ., DI-3A . � _ 1 ' " Pi e DiameL'cr ih • 4U.00". "'Y " ' Pipe DiameLer (in) . .� ; 4[1.00 CfS ' . ! � � P ( ) • 5 � � �0.00 Length trr� : �o.00 r -- - - ------r�- --�---�- . RCPCLN 0.11 0.67 �0.07 a.29 7.10 5 0.52 2.06 IS � O.OI3 �(p � � � . . . ; .r:.. Length (tt) . _ ,. : . . _- • (years) (in/h q, . - , . ,,F,, . . �' ,�, � 13 DI-7 � z � �j , .7 �. 5. 40 3 . 40 13 DI-7 . O. , ' ' Control: RW a Riser acting as a weir . . -- � . : �control: RW � Ttiser actin as a Weir � � � r 6. 35 4 . 00 CMP 0.09 0.90 O.OB 0.37 7.10 S 0.58 2.63 60 0.50 0.013 184.66 ,,. ; . Q g `�' RO � Riser acting as an oriCice �::, v, '-�, ' 12 MH-I ' �� ; Ro ttiser acting as an orifice ' �� � ' PT'a llorizontal pipe in inlet control � Pi � ltorizontal pipe in inlet contirol � "'.. , , lU 7 . 10 4 . 48 12 , . :.: � PO = llorizontal pipe in outlet control ^ ' ;` t'''•-` \ ; .• � � � ' 2� `' 8 . 00 5. 04 RCPCLN 004 0 00 OS 710 S 000 2 IS 227 0013 976 � � PO = llorizontal r�tn� in outl.et control MH-I , P � `" . . . . � . . . . - 1 ... . . . ' � �. { . . . , '... . . . . . . . . . J . � � Time InClow Riser Total Elev Storaqe y � � O 6 �� /; . ' ...: , , , . : - • - 5b 8 . 90 5. 61 � , I I Fx.Mh4-I '0.�5 cfs mficimum release from d�terrt. ' Time Inflow Riser Total ]:lev � Storage . � - � � � ` , . _ j. (min) (cts) (cfs) (cPsJ (it) (cu t�) 100 t ' .� 9 . 60' 6. 05 ` min c!s cfs cts It cu tt � _ ---------„------- ' . 6c MN.I ( ) ( ) ( ) ( ) ( ) ( ) , ,, ------------------------------------ . 6c.RCP 0 00 0 00 00 I 7 I 0 S 0 00 I S 9 � . . ��.� ,. : ' . 'I . 3 �' 0. 0.9 . • 12.��0 .01 0.013 19.44 ----------------------------------------------------- . . , � U � o.o o.00 o.o o.00 ioo 20 0.00 , , o.o o.00 u.o o.00 �00.20 0.00 . � r • , Ex.0 fx.MH-I � � ; 1.0 ,- � O.J5 0.2 rr O.iG 100.]7 S.IIG . . 1.0 0.4G 0.2 0.20 100.40 7.05 _ � 2.0 0.70 0.3 0.25 100.5G 24.oU • 2.0 0.92 0.9 � � • 0.27 ]Oo.G2 ]d.64 • " ( n 05 0.] 0.91 100.77 G0.77 �•0 ].�II 0.3 0.7Fi 100.90 II5.f11 . • � v ' � � `i 9.0 1. � � 4.0 1.40 O.A 0.30 101.02 11].J2 '�.0 1.07 0.4 0.4J IOL22 159.91 ,� 5.0 1.74 0.� O.q5 101.72 lII2.i15 �.0 2.29 0.5 0.51, lO1.G0 255.70 r, G.0 1.54 0.5 0.51 101.59 252.47 G.0 2.02 O.G 0.59 101.94 949.49 PEAK FLQ�I�/S , - : ; 7.0 1.74 O.G O.G4• 102.21 425.II4 JOb NO.� _ � " 7.0 1.7� O.G 0.55 101.7F1 J04.74 . > t1.0 1.12-` O.G 0.5D 101.92 �49.4] n.0 1.q7 0.� O.GB: 102.42 4II4.�a . Post Develonment Cond�tion fon site ar�a detained in nine Jl2) 9.0 O.hl O.G O.GO ]02.01 �G8.70 9.0 1.19 0.7 0.70 . 102.5G 524.�f1 - z ;g:. DWdW+GE RUNOFf I RAINFNI. TIMEOF RUNOFF �6-3� : � 10.0 0.92 0.7 0.�2 102.G4 545.91 ;�' " TYPE TYPE /�RFA COEFF, C X A INTENSITY CO�JCENT. IMCAEM ACCUN PIPEDUI SLOPE /V10W. � � `:•' 10.0 0 70 ` O.G O.G1 102.0� 3II0.79 - . , . � . 11.0. �: 0 49 ;; U.G. 0.G1 102.0� ]00.02 r r r _ -__ ROM TO STRUCTlJRE PIPE (AC3tE c ItJ�REM ACiQJM iip mJhr T min Qio � Qio � Q � �+TS C Axea ac CA D m 5 n ' 12.0 0.2D . ., 0.G O.GO 102.00 3GG.12 t 1�.0 0.10 0.7 O.G9 102.�1 �OD.7D ' ^r � ii, O� ` r 11.0 0.G� 0.7 0.72 102.G� �4 9.�2 � Area NUTT1bL'r a F � 17.0 0.07 0.G 0.�fl 101.91 ]J9.54 � r �������_� c ���� ��:��_ �����: . . . . . 1 . 0 850 0 3430 . 0 323� ' �I ' ' � . , . _ . -.._____d Tot 0.--- -�---0. 3 -- --- --- 2 Yard Dram . . __ _ Weighterr als ; 850 80 0.323 12 I.Oo 0.013 3.57 - _. . , ' . ' � STORM ROUTING - 10 Y�ear � : R N o, 0.45 .03 0.03 5 0. o.2Z " ;9 2 CP CL 07 0 7.I 0 22 . ' � STORM ROUTING - 2 Year ' � . . , Tl of� co � ' � Post Develonment Condittion (�i � = � 'me:: , ncentra�:i.on= 5 min 21 Yard Drain FRA NK D. COA; J . '. . ~l CERTIF ATE' N :��' � " Post Develoriment Condition (�i� �/31 _ ; ; `�� - 2i Y�-d� . ._ �_ _ ; „ - ____. � ._ � '. , 0 0 4 12 013 3 91 ra�n ; � • RCP CL N 0.06 0.45 ~0.03 .06 7.I 0 S. 0.I 9 . 2 �D�0. . .� � � � . � . . •►a{a f a�r a a r�a��a a r 1.�A��f+s s a e�a i s s+s a t���i F H a a F+�i���A s a+s r a f►a s f a a*�.w•w.w. , s r w f I.#►►#x.f*/1.a i�f►��+���*i# a a i 4 a+a f i f#�#�f s+f++�a f f s#+A�###a+i�il r i a A i a R a f.}i w#�* , • .. ,.� .. . ,. ,. . � ,. • . . .. � ROUT VIiRSTON 5.4 +• PROJF:CT: PIhE /]� 2yr STORN, *+ DATE: 11/7/199G* : : + ROUT VGRSlON 5.4 •+ PRO,JGCT: P7PE /�, l0yr ST�RN, ++ bT�TEi 11/7/199G+ . ...^- .S, 719 . 4. . , Period ` Intensity Peak Flow; , r' zo Ya�dDr�n o� �,w � _ s*�s+��+'s�a+*��*st►►+�i�+aa�*+�ra+�*��*arsi���r+rs�i+�*a�+ia►r�ia+�s+���a+�++i s+►t►r��si�w*�r�tf�f*ws�:*f►�►+t►af�+r►�����►����raar��«s�+►�a�R�f+s:�a+ai�s�� ' • t . 20 " Yard Dr'airl • , �. , �. . T �Qs: �:weir; 2:Pipe; ]:miser) structure � RCPCLN 0.07 0,45 .03 0.09 7.10 .22 0.64 12 I.10 0.013 S , . (TYpes: S:Weir; 2:Pipe; 3:Jiiser) StrucLure 1 . ; � YF - - --•.--�----•.- �-�-�-�'--- • � ;.. � (in/hr) (c s) �'s :.. f �'� , . - � _` , . , , (years . - �: . --- �. 5. 4 0 - ,;. y�. _�___------ , , ,: ' . -. I 9 Yard Drain �N A L 0 S 0 3J . , _ . - ------- . • , . . �. Riser � 1 T e . 2 „ • 1 74 V . 19 YardDrain ; 1: Type ' i ;�,- • Yn ]: Riser � S'I � _ ' �. ' wetr: 2: Elevation (it) o.00 �! ; weir: z: Elevation (fep o.00 ` ` ' ' S ; � 6. 35 2 . 05 RCPCLN 0.05 0.45 i0.02 0.1I 7.10 S 0.16 0.80 (2 I.10 0.013 3.75 , �: r.ength �rr� o.00 �: Lengt-h (ft) o.00 ' 7 . 10 2. 29 . 18 YardDrain i DatGt i o� ;:. 4: CoefficienC 0.00 4: Coe[ficient 0.00 �° , • � . ftiser:. 5: �levation (ft) 10�.�0 , Riser: 5s. rlevation (ft)I ]09.�0 • 25d � 8 . 00 : 2. 58- 18 YardDrain i � � .� � .g6' � � '� � ' ° �: Dinmeter (in) 70.00 ' G: oiameter (in) in,00 50r , 8 . 90 2. £37• CL 0.02 0.45 0.01 0.1 0.06 0. 15 20.60 O.oI3 29.44 Revlslon� �;..' 7: OriCice Clevation (ft) 700.00 : 7: OriEice Eleva�ion (ft) 100.00 � - - RCP N 2 7.10 5 86 ' . D: Or.ifice Diameter (in) 4.0o c 1p. DI I lOGi 9 . GO 3 . �� . n: orifice Dinmeter (in) 4.�� • y 17 DI-I 9• orifice i:]evation (Ct) 0.00 ° 9: orifice Elevation (ft) 0.00 ' . RCPCLN 0.08 0.44 0.03 0.15 7.10 5 0.23 1.09 IS 9.86 0.013 20.34 '�, �{�q7 � • . .70: OYlfice Dinmeter (iny o.00 lo: Orifice DlameL-er (ln} o.o0 4 � • I6 DI-3A � Q Q ' - � ' 11: oriCice I:levation (ft) 0.00 � ii: Orifice Elevation (ft) 0.00 � ' - 16 ' DI-3A 7.V• 1� ��� Ci�• � 12: OrlCice Diameter (in) �.�b ` 12: OriEice Diameter (in) 0.00 k • • • • I?ipe: 1�: 7nvert Elevatidn (ft) �oo.00 Pipe: 17: Invert Elc�vati.on (ft) io0.00 � R 0.04 0.8 i .03 0.19 10 S . .32 IS . 0.013 10.78 ]4: Uiameter (in) 15.00 •. 14: Diameter (in) - lS.00 . i . _ , 12 MH-I ��N 0 0 7. 023 I 277 �. � E ��: or3ficQ �i�m�t� � , PEAK FLOWS 7.�0.�{1 �'E�' CA. y 1�. orifice Diameter (in) l�.00 r (in) ].,.DO , _ ;. . - . ��: r.ength �r�� �oo.00 ; , ��: Lenqth �rti� . �oo.00 Post Develoriment Condition (on site a�rea detained in ni�e �l3) �5 oia � . 77: M�nning's n 0.01� • . 17: Manning�s n o.ol� '� ° � :: s' RCPCLN 0.82 0.30 0.25 0.25 ).10 5 IJ5 IJ5 15 24.00 0.013 31J3 in: slope �rt/tt� o.o�o '� • in: slope �rt/rt� •o.oso � 24 TrcndiDm. ` . 19: .I:ntrance I.oss Coeff3cient 0.5 'i 19: Entr�nce Lo�� Coefficient 0.5 ' � 24 Trc.ndlDm. ' ' surfnce: 20: Initial Elevation (ft) 100.0o surface; 20: Tnitial Elevation (it) l00.00 9 - � ; - ` - ` ` �. RCP CL N 0.46 0.I I 0. I S 2.50 I S 4.50 0.013 I 3.74 . , . . . �� Area NumbeY � r�a (ac) CA 0.23 35 . 7. 0 0.75 - storngo PipQ Chnract-erictic�: Doanstrenm 7nvert Elevation (ft) : l00.20 � Storaqa Pipo Charactaristics: Downstroam InverL Elevation (ft): .100.20 • ---------- ' ---- _______-- --------- • 23 MH-I C A Dewnstrnam N+�hhole Araa (sq Ct) i 20.00 • Downstream Mtsnhole Ar.ea (cq tt) : 20.00 � � ` 23 MH-I ' �~ � ` upstream Invere elevation ([t) : �oo.so ' ' . • . • 5 1870 0013 2801 , ` ' , . Upstream Manhole Area (aq ft) : 24.00 � Upstream 7nvCrt Elevation (ft) : 100.50 af.., _r--___`______ r-___ -____r __ ____-` 6c.RCp 0.04 0.00 .00 - . O.OD I . . . 1 0 660 0 470 0 310 Pi e Diametier in qg,00 �pstiream Manhole nrea (sq ft) : 24.00 _.._ 0 0..35 7.10 S '].7� I I Ex.MH-I �i - Len th ft ( � � G0.00 • . Pipe Diameter (in} : 4II.00 , :, �' Weighted Totals:. �. 660 0. 470 �. 31.0 , , � � � . ..., I _ ' ' . , � . 28 � 2 6.25 0.013 8.93 . . . , 9 ( ) Lenqth (tt) . G0.00 ,i" • . } ' Yard Drain _ C'ontrol: RW � Riser acting as a weir Contirol: RW � Riser acting a� � w�ir � � , Time of' eoncentration= 5 »11I1 RCPCLN 0.20 0.30 0.06 O.b6 7.10 � S 0.43 0.43 I Ro tr ttiser actinq as an orifiee Ro a Riser acting as an orifice , f 27 Yard Drain � , ' . PT = t�orizontal pipe in inleti control PI tr tlorizontal �ipe in inlet control . Perlod; < Intensity Peak FZOW 27 YardDrain � � • Po Q florizontal pipQ in outlat control , � � , Po n llorizontal pipe in outlet control RCPQN 0.83 0.30 0.25 0.31 7.10 5 (.77 2.19 (5 (5.�f0.0I3 25•�� , , ,: . (Years) (in/hr) (cfs) - .,.,.�- � " T'ime InClov Riser Total Elev Storage ; ` TimQ Inflow Ri3er �otal Elev Storaqe � -�---� ----�---- - �------- SGt71G I '. '-. � . ' f .. .., (min) (cts) (cP�) (cts) (te) (cu ft) � (min) (ct's) (cta) ((cts) (tt} (cu ft•) 3A MH-I ` ----------------------------------------------------- � ' ----- - --------------�--------=-----------______�--- . . . �.B �.o�� A OTED 2� 5 4 o i 6s o' ' ` o.o o.00 o.o o.00 ioo.00 o.00 � � o.or �� o.00 o.o o.00 ioo.00 o.o0 5 � •: 6. 35 1. 97 � 6cRCP 0.41 0.65 • 0.27 0.�7 7.10 5 1.89 1.89 IS 10.33 0.013 20.82 S N � • , ` 1.0 0.34 0.2 O.IG 100,7✓ 4.74 t ' �•� . 0•44 0.2 0.19 700.�9 7.12 ` 10 C.. , 7 . 10 2. 20 � ,,r,_.._,..,,� �„„��...,,,,,,,�,�, . _,,,,,,„,.•-.,.,�; .. -.,,vr.,,.- .. 6c 6c.MH-I � � 2.0 0.G7 0.2 0.25 100.54 21.G3 . ' : : ' 2.0 0.i18 0.1 0.27 100.GI ]2.72 , -r""',._ ..�,,,,,,,�,,�.-..,,�,�, �,�-^,'"'�,.,� :,.,�;,....�,.,;:.,,..,,,,�^^....^"'^•»d.��-"<,� „�..,•.- .�- �,:„�,� .,...�„-,�.,...�,.,,E � M 2 5. ; 8 . 0 0 2. 4$ , l�--..--.,.,,.,.� - . p 3.0 1.01 0.� 0.]1 100.75 5G.24 ; . . 9.0 1.]2 0.� O.J4 100.8� DI'.49 �`�V - - _ _ --• . , � � . ,.o i.�a o.a o.�� �oo.�� �o�.�o i a.o i.�c. o.a o.a2 �oi.i9 i�i.s� 50�' f3 . 90 2 . 76 � Fx,D � . Ex.Dt-7.. . . Shaet Tltle r i • fi.0 2.20 O.Ci 0.50 10�.55 242.95 - y: a, .,.o i.�a o.a o.n4 ioi.2u i��.oi . . . � . y �6c.RG' 0.$2 ':090 . � 0,74 0.7'4 ,� 7io � � s . 5.za s.z4 rs _ � i8.�o o.o�s' 2e.oi STORMWATER . �.o i.4� o.� o.�o ioi.�� z�9.�5 r �. �.o i.9a, o.� o.s� ioi.na �s2.5� . 100:` 9 . GO 2 . 98 � ' 23 1'iH-I - � � I� c� > '7.0 1.27 0.5 0.54 101.72 2II0.71 "� 7.0 1.G7 O.G . , O.G2 102.14 404.DG : - ,; � . , ., . . . . -� . CALCU�l1T��NJ fl � . . . �: . . . . . ' . . �' . . . . .. .:'�. • . . . __- . ._ . _ - . . . . . , .. .. . . .. . .. II.0 1.07 O.G 0.5� lO1.II5 325.OE! �� II.0 1.41 0.7 �O.GG 102.9� 459.II2 - 29 ,,: DI-1 . ;; � , " - . � I . 9.0 0.87 O.G 0.5D ]01.94 34II.G2 �` . . 9.0. 1.15 0.7 �O.G9 102.47 497.08 � . . ' ; '_648 1 u� " r r '�. , - ` �. ,;>' '. ': RCP CL�I V 0,14 . <'0 67 r t.',`�� �1.09,` •O.CJ9 ; 7:10 5 0�67 0.67 15 I.0� � 0.013 , I 1 a 10.0 0.G7 0.G 0..,9 lOL 9U 1�9.G0 , , . 10.0 0.80 0.7 �0.70 102.5] 515.J5 , . �y � . ' . ,. , : � �'JhGGt NO.� - �., 1'2. t�3H•I , . ,., ' . . . ,." . -. 0.G2 0.7 i0.70 102.54 51II.5� ` , • .__ _ _, ,r � 12.0 0.27 O.G O..,U 101.92 � �54.2II . � , 11.0 _ _ _. � . , : , .. , .,�. . ..�;�w... � � . .,..�.�....r.-,•�... .a".'".�:;., • 17.0 0.47 O.G 0.�9 101.97 t � 744.24 � . :, 12.0 O.�G 0.7 �D.G9 102.50 505.U4 . � � � U 1 � � . . . � . ,' �d, ,,.,,a�... . �`"'•'-e, "'...�,,•�."""""" . , _.,.s„ec.,,.�.e,,.,,,� ._A � .....� �.... „ f__ .. `--� . . . � � � .�,� C 7 . 10 cr� 13.0 0.07 O.G ' 0.56 lO1.II7 J17.9] 11.0 0.09 0.�. . ID.G7 , 102.40 477.75 . . , . 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ReJ To�Gr:�cs 2 Ilx. � �„_ _�� �"-r' C`�„�, '�� � � �--� ' � � �1 - SCOVIpJI NURC Cf0 20 Itix. � � .��, � � 2.5 1.5 2.5 �II �. i���� �; 3.5 ?.5 3A � 15o Ibs. ' � �q. �, \ �\� / � --cz.;� � �� �i� � HO H 4.0 3.0 3A � Low-Mainlenance Sloot(S�e,tMr Ihan J:II � �� � � � � / A �/ ,` d�'Pr t'1.oM �� _ ��i�I'r= � � � 4.5 3.5 4.0 ��, e il°� I - Krniucky JI Pescve: tlut Ibs T. � � / I Illl���" � �,,:., -I �, � � S.0 4.D 4.5 - IteJ T�n�Gr•rcc 2 Ibs. � �r� ��III =�III:�� �I - Seawnal Nuru Gorp' 211 Iln. � �r - � ��� �� - p07fN TR[Apv CRfAIC ' � /P ' I�I` CMVEI f�l1ER� I EnC�+SOn 0�f�BfiC.WD�nRC Ni0 iM fREMCn ', � ExUVATED AREA � I � Cnwnvelch" 1 I� ewoov[s PfRFENO1CUUp \ � . i ij�� �'r � ,' � ' � 1 WU(. DEGTH = 4' I 150 Ihs. io nrt s�or[. f� /� �orr.,reR �Rc�es� j w i ORICINPJ. P S � / ���a� Y/. /� , , nuu[o w.rze �KrFe reemc r'`. � � � � CROIXJD 'Use xnwrul nursc cro in accorJ•rnce with seeJin dales av slaleJ ixlrnv: J ''/ �= I `�(/ '� ELEV. ' Pebruary 16ih lNrough April .................... . Annual Rye '�� yT ° I �����I����,� f � ��I� � j � � '� • I�J,' -Ji:, i � May ls��hrnugh Auguxl ISdi .................. .. �o:l•ril Miilel TP�1 CIiING � � �'�-'e �}lil �ll- 1 _�I August IGth ihrnugh CXtolxr ...................... Annuai Itye 1, � �� � . �� - -- � � � �1 - � Novemtxr�hrougli Pebru:iry ISdi................... Win�cr Itye p -- - r� ��il- . ' I � . J � •• SuFxtiiu�e Sericea IespeJez, for Gownvelch tacl of farmville. Va. (May � ��H� � 1ii �_..�c� +g I 313 Ihrough$epteml�er uxc IIUII[QI SCfIlYO,JII��h«,x���,�,�u,���,�����s�,;«�, SR SURFACE ROUGHENING � �yl �' � '� � SF SILT FENCE � "�.' I(Flatpea ix useJ in lieu of Gu�wmelcl�,inereaxe raie l0 30 Ibt./acre. All Iegume I ewe�RE currER� ' --�--- -----� � � � � �i r i/� T, seeJ musl tx properly inexvl•raed. Weeping l./rvegraca may I�t nJJeJ lu any slo�x ��:-1 c�me rKn II 96-30 I ���s�i-f NOP�i f�� .S L DIML NI I 11.�l or Imv-mainienance mix Jurimg warmer xecJing peri�xls;aJJ 10-20 Ibs./acre in Not to Seale I � �', NOt 10$C81Q mixes. I I 1' v�RWilf SPECICIC �PPIJCATtON � Q�/ �� ��-� THIS METHOD Oi' INLET PROTERION IS APPf�CABl2 AT CURO INLETS i apK;µ,� �vnJ:i�l41��''{I MMER£ PONDING IV FRONT OF TM! STRURURE !S NOT IJAlLY TO CAUSE f.Rf11k10 I___ r Jr E O UTLET COI�'DI TI DNS AR�S�fNIfNCF OR DAYACE TO ADJACENT STRURURES AND UHPROTfCTfD � . "" ` PS PERMANEWT SEEDING - - ��- • ��,�E�S�.LL ae ��- ,�. ,�s, oR 5 COARSE .��Re�.� � STONr CONSTR UCTI DN LNTR�NCL F�r D. . ,�x. ��w.tt,.i� - �,�,�• Not to Scale A A y1,OPG G"mw � CERT7FI TE N0. � ' TO DFN. �m. �.�:,.�, � 7 18 �v / �i 3d . 6�� �l�FI .�. ���. � �in r � 67� '� �`p` � �° IP INLET PROTECTION �� � � � ' ' ' �� i � ([xuv�r[o) � � ru�i�cwiN- � w� � �ru�n.wr er� i s`S f �� TAISLT:3.:11-Ii -....... . v�re ovr� ro rv,T � W'�•�� �NAL .•wx. fIIFF GlOfll (x�CM4 �, � ����, ARFJ� �IT1 NO DEFINfD � Not to Scale � �XE 1`IAfE J.13-� CWRSE/iG('/CGATE�� GlASS I R�'RAP PUN VIEM CHANNCL ("S'���D SIDL ELLVATION I �4C' ACCG[''I'AijLG TGMPORARY SGGUINC PLANT MATCRIAI,S �� '�"'" -�H I , 11.11.96 CROSS SECTION OF OUTLET I � � I � , 'QUICK RGf CRGNCE POR ALL RGGIONS" , � � V����� y � Revlsloo� o:� � ri�,`r i � 1 i J i � � i rnsur`. I � n �� 1m� �.uz;r reira.r R:I�C � � T 6" SIDPE �.viw�i 3-11'77 , «��,,,��,�EF„ - T�'MPOPARY DI[ �'RSION DII��' ��_ F� �'�� �"= I �''�:� '�� rnTc.am� m i.r-r.ucoy�auro rw r.nRc r�.��rrc� - i� � �� �a.cR�w.sc .ar,. Plantine Datcs Snccics (Ib� 'crcl sccrion A-A � ( + .' c T°I T � � ((� �1 . � � ' (u��c.� � i � � Q '.'�.m i���s.�..rc Q pG /�/� �►�`�4. '��1.-���7�.. �_ ��/ /unrtn:ion I P' � �T- .wm�.n.o rui��urc � I ��..w�..,u� � �• C�� 1 1 U W. �[ si .i��cr �"�b"- - -- Sept. 1 • Fcb. 15 SO/50 Mix of � I � ��� � � � � �� Annu�l Rye rass �� � �a o � Compacled Soil . . �. _ F I A � ( IN) �:�ra�tunss ars. �-• � ----1.. I ' ���� PLAN VIEW � ����� (Loliu&mulu-tloruml SO- 1(� L- -------------,-• ;; '.: I - �. :.. � L. } -�.'� ; �'.-f` �\ I�" m i n. ' � I v`--����r=�� .}{•_' �������.� Cercal (Winter) Ryc PIPE OUT1iT ro Kcu. I -- - - --Flor+ r � I {� DffINED CNAIHNCL � (,$�calc ccreale :]I: �, // �: � .: r..� i ���/i " �- - � � Pu� �,� ; Ill�i=_ �lll-lll�-�IIL�=1ll1 �1111=�11i= IlI �,,,�atto,�� I S S l� i �___ �e I�Il�i�ll -�fi (�i-f�i�- � Ifi -- SE�T�oN �-� � �,� . ---,, ..� �� .�. � �� ' CO"��'�""���/�\//// �'^�� Fcb. 1G-Apr.30 MnualRyegrasS 60- ]00 � 4.5' min. � 6-' I cxuw�cu �nutn ciou� '�� (L.olium multi-(lorum) ' °_ -' y � -� I ,�. -,�� � -� , a / SECTION A-A r-^� � n nuoi nam m'w f-�.�ecoY�uum ro�trm�[ruu�[�n May 1 -Aug 31 Gcrman Millet Sl' MOTl3 1 A�RDM{JNIMG YlT![RI�II�P,GROVTLD�I►4�.GBIOM � ��COARSf AGGNLGAIC SIIAI.L UC VDOi (S, /S57 ON /5 C � - T� �J��.l(I.l I(.l�l[il� YASKR.OP CpMC11LTC S 1��s rNc tawcTM or tNt RIPt1P�►�ON LS UILVI/,7[p c(�wrooc[D f➢Mv[�[� �py,yM y� OUTLET (PERSPECTIVE VIEW) V]IMG�WT[S]1!-��NO]1!-� �Gp� � o a - �a nucs n�c Y.tYIyUY TOX[D4YR1�.BlT MOT SECTION 8-B � tas rx•w e i■cmcs -----. . �, AS NOTED Q � TS TEMPORARY SEEDING OP OUTLET PROTECTION DD DIVERSION DIKE CE CONSTRUCTION ENTRANCE ti � Not to Scale Not to Scale Not to Scale Not to Scale Sheet Tltle� m 0 E & S DETAILS - Note: Construction entrance to include 3"of compactecJ, smooth � bituminous�sphalt over aggregate base. Provide water tap to ezisting Sheet No.� ` waterline,a ACSA meter wd boz,and a 1-1/2"��ash hose. Slope 6" min. �, W dnin.Wash water shall not drain to cul-de-sac. � Q , � 0 = �70f21 � � r Oct-07-97 12 :43P P-01 t4 I SS Vess Excavating, Ltd. 1932 ARLINGTON BLVD SUITE 110 CHARLOTTESVILLE, VA 22903 (804) 979-8800 FAX (804) 979.7338 October 7, 1997 Mr. Bobby Shaw Erosion Control Officer County of Albemarle 401 McIntire Road, Room 211 Charlottesville, VA 22902-4596 FAX: 972-4035 Re: Skyline Court on Lewis Mountain Drainage from Construction Entrance Dear Mr. Shaw: Confirming a discussion between Walter Bishop and Kenny Thacker today, we have proposed a change in the drainage detail for the paved construction entrance on the referenced project. This change consists of grading the pavement to drain off one side, through a short V-ditch into the silt trap, which will be located closer to the C.E. as shown on the attached sketch. Water from the silt trap will be discharged through the weir and enter the D.I. behind the sidewalk in the cul-de-sac. Please call me to confirm approval or if you have any questions. Sincerely, .g- Douglas IG- Arnold cc: Tim Wood,Artisan Const. David Anhold,The Cox Co. Walter Bishop �-.7f n 8 �rr- 11�9 ti',,. .` lt. �a f OCT 0 7 I%ki Engineering i=Lblie Works i, • Oct-07-97 12 : 43P - P. 02 - -- JOB SKY4.'NE (e9C//T C.F. DRAIN.4E �--.....,. SHEET NO- OF - f VESS EXCAVATING, LTD. CALCULATED BY DATE _ I SS Doug Arnold CHECKED BY- DMA DATE /o/7/137 Estimator +f= ' SCALE ' �� Office: 804-979-8800 I ! i Mobile:804 98l 5388 Fax 804 979 7338 i I • ; , l 4.. ...t.. ..1... 4 } 1 j i. f i i I It i t I i i •i ! ! t j I I 1 l , ! I i ; 4 i I i I ; t H . 1 t t i i t i l i ' F i ' • • I ; i i t j 1 ! ! i ! ! i i l • I i � 1 I 1 i i t , ! i i j i t i i i i �.- .1 _ .1. 4 1 .. .#. , . . .. ._. - . ... . .t t ; } 1 . ,.. ..T . . J t . , . 1 . .. i � ! t I 1 I I I• 11 1 i I 1 • 1 I t i i '1 - i I t I i I , • i I t i ' 1 i 1 ' I i i t • ... .. ! i i } . • + + t i 1 I t ' i 4 ` 1 't' i ' I I - I j REEl>Gr47 D V�DITQ-f • g. I 1 ! } i ; i I j' i t. 1 • • _• 1 WIEIR .t ;� I ; STaAa 1 814Lcs O. ce E xa-r.i A4 r DJ.. . . p i *,/DdERosLoN CONROL P Reviewed an �il Ar vat, b, the , 1,,pe' A ,� Ait er+ �l C^ #� ruli'otirir bep rtment /0/3/97 Date:w!r- i3- 9,G. , . Plan# ' /G c/ _ net re • • i • . i I SOILS MAP � EROSION AND SEDIMENT CONTROL NARRATIVE "������:,�.,, `�� ` "�`�� " e). TemDorory Dive rsion Dike C3.09> Y•` � �:�.� ,,,�«: � r +► Skyline Court on Lewis Mountain A ridge of cormpacted soil constructed at the top or base of a sloping �r��, , �-iF `$,8 '�'`+ Albemarle Count Vir mia Tl1E GOX GOMPANY ' � �, w �'�O,y:����,� 601 ���`�, p Y• 9 disturbed c7rea which diverts off-site runoff oway from the unprotected slopes � - :'"�r � ond to a stobiliaed outlet,or to divert sediment laden runoff to o sediment nd.,e„.Cn�r�s � •� � - �r trapping structwre. Maximum effective life is 18 months. ���'O �^�°�t' ; •� 250 , �, '��• �;��=�`J 88 ,. .}" ' -�r `�`y�, 1. PROJECT DESCRIPTION � OUtlet Protection C3.18) ��t�►�qn,5trset vb VfqrMe , �� �-^ ` ', •� `•� �_�'rt�1,,."-3 R•�;,,_�, . This is a proposal to locate and construct seventy (70>residential apartments on 4.95 acres ot The instailation of nprap channel sections below storm drain outlets to reduce 22qP:2•CeOv1245 7i31 � . ,.`��;, 4 �"�� land in the Jack Jouett Magisterial District in Albemorle County. The site, located on Lewis erosion from s�couring at outlets and to reduce flow velocities before ��°'�� ,�. r -��,i�� �", p� �' ,� e�,,,,�� ' . Mountain,just west of the Charlottesville CityLimits is surrounded by woodland,and high density stormwater enters receiving channels below these outiets. s���,�4-: x �.� ��Y . "`�e. �` , 1�.. residential. Access to the site wili be from Coionnode Drive. '>� �G iQ _ � �t .< ~ The ro sed lond disturbin activit radin ,�tilities, ond srte im rovements ,as de icted on 9> SurtoCe Rou henings3.29) Gradin ract�c�s such os stair ste in or roovin slopes or leav�n slo es .. ^g,�, � � P i� 9 Y(9 9 P ) P g P PP 9 9 9 9 P r�"� '+ , >, +� G� :,r� ihe accompa�nying sffe plan,will include construction of the main entronce road,pancing areas in o roughene�l conditions by not fine-grading them Reduces runoff �` -�' ,� � y � •; _ �;: , , � �e�•. "��� . to accommodate 108 vehicles(55 deck and 53 extenor),and an apartment building including 70 velocrty, p(provides sediment tropping and increases infiltration,all of which .,,°�,it� � - . _�,.��.,� �. ,,, � - . �, 1� residential ap�artment units and an office. A total of approximately 2.66 acres will be disturbed facilrtate estoblishment of ve etation on exposed slopes. Applicobie to all ._. . `�` "°-, � �^� '' v ':'+�� '� � during constrWCtion. 9 ,„��e`�j� N(�'�i ; • �,. ..-. slopes steeper thon 3:1 or that have received final groding but will not be �,-�, t �� � ' ��r' .� - � - stabil¢ed immediately. Also recommended for other exposed slopes wffh =s�' *l•% � -. ' �� � � �. ,��1,.,`r' II. EXISTING SR'E CUNDIT10N5 flatter grades. � �� =4 � » 4 , j.�.� y��"C �'� Sr The topograp�hic conditions of the subject property are depicted on the occompanying site � �,,�`'`� "�� '�r '.'���"�2.� � � .� ,� ,` �.�' Y `' P�on.The site is presently inwoodlands, and there ore no mon-made features on thesite other h) Temporary Seedin�(3.31) � �,,,«- �tY _ ,,� ;,��. t � than o gravel�access road to an existing Albemarle County Service Authonty wcrter tank facility. The sediment basin embankment, temporory diversion dikes, topsoil c3.•« .;�"• ,�` . . � .,�_ ° , �. �'�} �'c ,,' `�� 1 � k , . � ,,,,, stockpiles, and oll oreas to be rough-graded during ihe initial phase of �� fl;,�� �� • � _ ;.'`,,, �'�ti ~ � ,; -� ���• ��� construction shall be seeded wffh fast-germinoting,temporory vegetation I � t ''w ,�;,�.' ���:• "-� y' \ : ,� f�► This site is located in a geologic area referred to as the Piedmont Physiographic Province. The immediatel fotlrowin rodin Tem oro seedin will apply to all areas on i r . • E, Y 9 9 9 P �Y 9 � �` �,�. � � � - :'�` �, � ��* ''�-.� ' �-. soils in this ge�ologic area ore weathered from ihe underlying metomorphic bedrock. The the site thc7t will not be brought to final grode for periods of thirty(30)days to ����. /;� ��."�� ' ��, a: " �� � , � naturally occu rring soils ot this site were found to be deep to moderately deep well drainedsoils one year. Selec�tion of the oppropriate seed mixture depends upon the time �,� 'CJ �$�' w,'�.,� { . � '��� ���h t" .:� that hove a clayey or loamy subsoiL The soils observed here were weathered from quartz and of year it is to be appiied. Annual Ryegrass is adequate for use during spring � �.� � ?� - rW �'� r ' *��4"��'� �"`R°'`' ����^�� ��". ��� � � �� � fT11C0 $Cfll$t. seedin�s (Feb. 116 to April 30). For winter seeding (Sept. 1 to Feb. 15),a 50/50 O �,.,� ...., �'� , mixture of Annual Ryegrass and Cereal(Winter) Rye is recommended, and � . _�x+: � �:�►.,,._� _ a r �^ T .� �r�t map units on the detailed soil map depicted on the Erosion and Sediment Control Plan, for summer(Ma�y 1 to August 31),German Millet is recommended, provided � � represent the soils in the survey area. The map un�t descriptions, along wffh the soil maps, can that all areas wh�ich are seeded are watered regularly. � �e� � be used to determine ihe suitabilffy and potential of o soil for specific uses, and,precautionary ' erosion and sedimentation control measures which must be adhered to. They may also be used to plan for the manogement needed for those uses. The profile of the soil classifications i) Permanent Seedlin�(3.32) follow: Estoblishment otf perennial vegetative cover by pianting seed on rough- � � Adjacent Areas: The upper slopes of Lewis Mountain are direcdy to the west. groded areas that will not be brought to finai grade for o year or more or Water draining from this off-site area will be diverted around the site to the ALBEMA,RLE FINE SANDY LOAM (2D): This is a deep, moderotely steep, well where permonent, long-lived vegetative cover is needed on fine-graded U north and to the south, with the southem water being picked up in a stormline. drained soil found on side slopes of 15 to 25� grode that ore 100 to 500 feet wide oreas. � — Drainage from the site will flow predominandy east and northeast. The northeast portion Typicallyr, the surtace layer of the soii is dork grayish brown ond brownish yellow � finesandy loam about 5inches thick. The subsoil is about 25inches thick,mostly j) Tree Preservatiorn and ProteCtion(3.38) � �.._ consisu of existing parldng lots, apartment buildings, and Colonnade Drive. The area to the strong brown and yellowish red clay. Hard rock is found at o depth of 50 inches. Protecting existi ng trees from mechonicol ond other injury during lond r n east consists of a future road right-of-way, existing parlang lots and apartment building. Permeobility and avoilable water capocity ore moderote. Surtoce runoff is rapid disturbing and construction activity to insure the survival of desiroble Trees � v � � and the hazard of erosion is severe. The slope ond depth to bedrock are the where they will be effective for erosion ond sediment controi ond provide Erosion and Sediment Contro] Phasing Plan primary limitations of this soil for non-farm uses. other environmeintol ond oesthetic benefits. 0 — Z HAZEL V'ERY STONV LOAM (40E): ThiS moderotely deep, steep, excessively r) 7'emporary Sediment Tran(3.13) � J � I�learin,� and Grubbin� and Rou�h Grading Phase drained soi� occurs on side s�opes. Stones, three to ten feet apart,cover 3 to 15 A small pooding area, formed b}'constructinb a�rcheo emhankment with a stone Q A. Install construcdon entrance, washrack, and hose-down facility. percent of the surface. Typically, the surfoce layer of this soil is dork brown ond oudet scross a drxinage swale,to detuin sediment-laden runoff from small disturbed O _ � B. Install all sediment traps along with associated temporary pipes, diversion dikes, and silt brown loam about 10 inches thick. The subsoil is mostly brown loam, 10 inches areas for enough time to allow most of the suspcnded solids to setde out. Muimum �/ ` fence. thick,and the depth to bedrock is oround 30 inches.. Permeability is moderate effecti�e life is I8 monch. and available water capacity is low. Surtoce runoff is very rapid and the hozord w � C. Install permanent stormwater conveyance channels at western erlge of site to divert of erosion is severe. Slope, depth to bedrock ond large stones are the primory V. PERMANENT STABILIZATION � � offsite water. limitotions to non-form uses such os roodfiil ond for buiiding sites. The soil is in All areas disturbed by canstruction wilt be stobilized wrth permoneni seeding immediately �1/ //1 � D. Install stormsewer inlets and piping from No. 23 to No. 25 to intercept off-site water and capacity subclass Vlls. following finish g-oding. All seeds will be opproved by the "Virginia Crop Improvemen! ' r V � � divert it to existing 15" stormline. Association,'Blacksburg Virginia. Seeding will be aone wiTh the foliowing: �i !r� E. Install tree protecUon measures. � �� � F. Strip and stockpile topsoil. Install silt fence and temporary seeding as necessary. �V. EROSION AND SEDIMENT COMROL MEASURES o) Two (2)parts Kentucky Bluegrass (Poo protensis), by weight;minimum Q _� ne contractor shall provide, construct and maintoin erosion and sediment control measures 98%purity ond 90'1%germrnotion; maximum 1% weed seed. O � O or,the site, in accordonce withthe Virginia Department of 7ronsportation and ihe Albemarle � II. Site Infrastructure Constniction Phase � , ,ry erosion ond sediment control meosures (refer tothe Erosion ond Sediment Control Plon b) Three i3) ports perennial Ryegross (Labium perrene) by weight; � � A. Install construcUon road stabilizaUon. �?). All v�getotive and str�ctural erosion ond sediment control praCtices shall be minimum B5%purity ond 90%germination; moximum 1% weed seed. � U B. Install inlet and oudet protection for the stormwater utility sVs[em. Install temporary -structed oind maintained occording to minimum standards and specificotions of the ' �nia Erosion and Sediment Controi Handbook. c) Fifteen (15) parts Falcon Fescue; minimum 98% purity ond 90% � pipes form inlets to sediment vaps, as necessary, until entire stormwater system is germinatlon; maximum 1% weed seed. � w (,J� completed. •nry sediment filters and traps, perimeter dikes, sediment barriers ond other measures �1 C. Sediment traps are to remain in place and be properly maintained un[il such time that the 'o retain sediment sholi be constructed as a first step in ony land-disturbing octivity Permonently seedea oreas shall be protected during estoblishment. � J � � site is stabilized and the s[ormwater storage system is in place. made functional before up slope land disturbonce takes place. O t..L_ D. Ternporary seed as necessary all areas that are undisturbed for more than 30 days. Mulch shall consir of oot or wheat strow,free from weeds, foreign matter detrimentat to plant � � E. Topsoil and permanent seed all unpaved, disturbed areas at the end of[he project. , - Due to steep grades on site and the density of the proposed development, stondard Irfe,and dry. Hay or chopped comstalks will not be permitred. 1 � �on and sediment control measures will be omended to utilize diversion dikes to direct ` � F. Remove all temporary erosion and sediment control measures and restore area. >ff away frorn the construction area, ond/or to protected inlets for dissipation. Construction Mulch ond/or I�me sholl be applied ot a rate of two(2)tons per ocre. y� Y w o�version dikes on the uphiil portion of ihe site shall be installed initially in order to direct off-site � M �?er awoy fro�m the construction orea. The contractor shall then phase construction of the Specifications for fertil¢er are FS 4F-241 C,Type 1,solid form; Grade A or B; recommended for U W �e system and inlet locations to facilitate erosion and sediment control measures. grass, with one hundred (100)percent of the elements derived from organic sources of the � � _f following properties: ( n � � rmanent or t�mporory soil stabfi¢ation shall be applied to denuded areas within seven (7) V / _.,� after final grade is reoched on any portion of ihe site. Temporary soii stabilization shall be a) Nitroger 12.0% �plied within s�ven (7)days to denuded areas that may not be at final grode but will remain b) Phosphoric Acid B.0% o�mant (undistturbed) for longer thon 30 days. Permonent stabilization shall be applied to c) Soluble Potash 8.0% �' NO�� �eas that are to be�ett dormant for more tnan one year. 96—30 With at least fiffy(5�)percent of the nitrogen from a non-water soiuble organic source ��'stabil¢ation refers to measures which protect soil from the erosive forces of roindrop impoct �;;flowing water. Applicable practices include vegetotive estoblishment, mulching,and the The following measures shall be incorporated during fertil¢at�on � �F Vr �rly opplication of grovel base on areas to be paved. Soil stabil¢ation measures should be ��ected to be appropriate for the time of the year, site conditions,and estimated duration of o) Apply fertil¢er at a rote of )Gt'�Ibs/acre. se. b) Apply offer smoot�h roking of topsoil. c) Do not opply fertulizer ot same time or with same machrne as wilf be FRANK D. , JR. c:�ilization m�osures shall be opplied to earthen structures such as dams, dikes and used to apply see�d. � CEItTIFICA N0. �versions immecJiately offer installation. d) Till fertil¢er into upper two(2)inches of topsoil. ,p �j! e) Lighfly wpterdry topsoil to depth of six (6)inches at least forty-eight (48) °,�, �e following siruct�ral practices will be implemented accordinq to the requiremenis set forth hours prior to seeding to obtain o loose friable seed bed and to aid in �'SS �G y the Virginia Erosion and Sediment Control Handbook and the stondards set forih by ihe the dissipation of ferfil¢er. f�NAL ounty of Albemprle. . The following rotes and practices will be adhered to for ali seeding that occurs on-site a) Temporary Paved Construction Entronce(3.02> ��� A seventy (70>foot paved section sholl be installed at the point of vehicular a) Apply seed a rot`e of 6 Ibs./1000 sq fl. evenly at right angles with a 11.11.96 ingress and egress on the construction site. This paved area sholl be used for spreoder or seedi�ng machine Rake in lightly, covenng seed to depth Rev�abo� washing sediment from vehicles exiting ihe site. Sediment shall then be of 1/8 inch. removed from ihe area by shoveling or sweeping and transported to o b) Do not seed area in excess of thot which can be mu�ched on same 3-(�-Or] sediment control disposal area. Where sediment is transported onto a day. pubhc road surface,ihe rood shall be cleaned ihoroughly crt ihe end of each c) Do not scw immediately following rain,when ground rs too dry, or during day. Sediment shall be removed from ihe roads by shoveling or sweeping wmdy periods. anc�t;�nsported to a sediment control disposal orea Street washing shall be d) Roll seeded orea with roller not exceeding 1 121bs. ollowed onty affer sedimeni is removed in this manner. e) Immediotely following seeding ond compactrng, apply mulch to 0 thiCkness of one(1)inCh. Maintoin Cleor of shrubs and trees. b). Construction Rood Stabilization(3.03) � Apply water with n fine spray �mmediately after each area has been Temporary stobil¢ation with stone of occess roads, subdivision streets, mulched. Saturote to six(b)inches of soil. � parking areas and other traffic areas immediotely offer grading to reduce erosion caused by vehides during wet weather, and to prevent having to vl. MAINTENANCE regrade permanent roadbeds between initial grading and finol stabil¢crtion. All erosion and sediment control practices must be maintained and repoired as needed ro insure continued pertormance of their mtended function In general, all erosion and sedimeni I c) Silt FenCe(3.05) control measures will be checked weekly and after each signihcant roinfall In particuiar, all A temporory sediment barrier constructed of posts,filter fabnc and,in some seeded areas will be checked regularly to ensure tnat a good stand is maintained Areas cases, a wire support fence, placed across or ot the toe of a slope or in a should be fertilized and reseeded as needed. minor droinageway to intercept and detain sediment ond decrease flow velocfties from drainage areas of limited size; applicable where sheet and rill � erosion or smail conCentrated flows may be a problem Moxlmum effeCtive VII. DISPOSRION OF TEMPORARY MEASURES Q, life is six(6) months. All temporary erosion and sediment control measures shali be removed within 30 days after �� rn final site stabil¢ation is achieved or afferthe temporary measures are no longer nee e ,un ess AS NOT o d) Storm Drain Inlet Protection C3.07) otherwise author¢ed by the local program administrator. Trapped sediment and other o This erosion and sedimentotion control measure involves the installation of disturbed soil areas resutting from the disposition of temporary measures shall be permanently Q various kinds of sediment trapping measures oround drop inlet structures stabil¢ed to prevent further erosion and sedimentation. Sheet Tltle� N prior to permanent stabilization of the disturbed area. R is limited to drainage m areas not exceeding one (1> acre, and not intended to control large. E & S NARRATIVE > concentrated stormwater flows. 0 ? `�1�'.,�.','�', - '�� � W 8� Q �a ,�� m � �a2bi��:tiL::F':��i`.�::X�-��-uc1iC�e'G3'ks �= �'� j