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Drainage Reports - 04/24/2020 (3)
City of Fort Collins Approved Plans Approved by: Date: Professional Engine�r Certifica�ion f hereby certify that this Final Drainage and Erosion Cor�trol Report for th� Cherry Street Cottages Subdi�ision was prepared by me (or under my direct supervision) far the awners thereaf and meet or exceed the requirements af the City of Fart Collins Starmwater Criteria Manua3. � � 1`````````,�01111fItIIfNlUlrij���� Paul C. Sorensen, PE o ���,s , � ......,, �. %, • O; �.SOl�F•.�'�: �;e�v '�" Registered Prpfessional Engineer 3' � State of Colorado No. 23679 : _.._ :ac; _����r�� :�� - o• .��; , �������,s`����1 At����`�`: ���rrrq►ulmu;�iav 1 � s-�us( Ds.siu��� suc� �z�,z�ou �cRa��o� �;�P3o� �bb�uqix E: E4oa�ou �ou�ao� �geho�...........................................................................52 ', tlbbsuqix p: psu.�s EItfUU IRIYJb ....................................................................................5� i � ybbeuq�x �: HAq�.sn�ic �owbn�sF�ouz.........................................................................SS ! ybb�uq�x g: HAq�o�o�ic �owbn�s&iouz.......................................................................SO ( ybbsuqix�: g�o�.wdecN Cl�su�psG �is�u� �s�cn�s�iou2 ................................................. a8 ( , ' �EEE�El�CE2 ...........................................................................................................78 i � g• p�g�us�e �ouceb�................................................................................................ 7� ' T• Couib�isuc6 m��N 2GsuqsGqz................................................................................. 71 ' E' coUlcrn21o�12 ...................................................................................................a, iS• Zbeci{�c pe�si�a.................................................................................................... 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GENERAL LOCATION AND DESCRIPTION 1. Location a. Vicinity Map ,., , . ,,. ., e . � - �" �; ._ a '�.� � ����"'�� �n'� �, . ` �, �. . ��j i �� � .:.�__.: .. -_ .� �� f s. � � �� � - � . �9 � � ..i� r, � �t•� j�,� � � � � � Ir'--._,..._...a�.�.<.�.�.r-�- . . . �" . .. I '�'. � ... 1 � �n SI . _- — --.. _ , -- � ' ! I i � , u _ __ _ ., � , E r� ... ,,,�_�` _ I „"�' � �� F �� _� � :� ��: � i � ��' � � ; � � �. �... .�._._. ��.�I �``� I � W - � , , . ;� ��` , - - .. . �� `� r;: � F�: I � � �� `� 'i I y �' i � �: . ���F;�rt ' ��..� ` � �� � ��� � � � � �y?7 � i . j� �i �;��- .... � '11 �� - � � ! �+:� _. -��J� "'� `'�_�.�`� �'� � � . =—� ��p. ,I w r , r- ,� ' � .s ���1t111�� `� ,_ �voGncr "'"" " a�. I� � C';St'tll �. -- ��. ��. I� � � �t'l};1t��l�iS '� � ' � '� ,�.... � �c � ,�3L`b�Ct F'C097� .� �+ - ' . .,a � _�`�- R � J- � { �_� .��I ���i �� I� N ��g I i . .. ._ . - �� � tiIP.� .. 'T.— 4�,� '' ���` . $ � '��` �`� �� ���"�"� ��_� � � `.� `� I� _ �i I �� � , -�. � � , �1q �� s,, I i �. ,. . �.� � � �,.`�_�. 1:� i. - f:'. -: .�� , � �} F ^ � �� �� �,r__�__y,�_, . ��� µ�� �. E � � -:� , � � �W. ... .. ...... . .----......u._.......—_ �—�-. - '�-����� . _ �, ..€�-�� ..--- - � °'� �,.,, ` �� ��1 4 � �i: . �� i _ �; .��E���� °rq� �` I�r I �": � t "ca�unrr�.:ct I � ` � ��� � - __ � .7,.. :� ��`�' '� � 3 u n:�.r , _ ., f� �:: �� i. - _ ' _ .r ��� _ � ��,;. ��e�"t fai1�liE�Nf3�t � "k — ��—�!�^ � �;��. �;� � � ��i,t;E� � �_ � �..:' ���t������c+i�. -- �; � :. ��`.. — �y{ � � �I�i;;l;#� --��l' �$-� �' � �� � I-�--�; , .'i4��l�:f.�. �'�°M.A.� �� �- . a � � I -r. i . � � I� u, ���. �{ � i , , ; , 1t la.If�dAJ�Y i� '.i`� ,!� �i��` ��� �� ry��' 'd� '.+—`.. .� � � = — _.a���-, I�� �-� ;: � : � i�� �.� �.�� , �, ..� � .y ��; � � � � �..-, � �. , . ���-, � . Figure 1. Vicinity Map ,��r�-�i '�s��ai�aa�=:= �,���d Erosion Cor7t���;l f«��o,-z 4 b. 7'he Cherry Street Cp�tages project site is located in the Northeast quarter of 5ectidn 10, Township 7 North, Range 69 West of the 6th Principal Meridian, City af Fort Collins, County of Larimer, State of Colorada. c. Cherry Street Cottages is bord�red to the north by an existing residential property; to the east by singie-farni�y hom�s (Hanna Farm Neighborhoad); to the west by Lyons 5treet and single famiiy homes (Mountain View Heights); and to the south by Cherry Street and the Putnam Schoal. I d. The General Location Map presented below identifies drainage flow Entering and leaving the property, and is based on the City of Fort Collins West Vine Drainage Flood Risk Map. As shown, and discussed in detaii below, a small channel of fhe West Vine 100-year floodway and floodplain exists �Iong the south ancf east sides af the de�elopmEnt. <_ - y -- ___ ---- � _.,_.� �f ���� r�l�F-3. __._ �l`7' ti�. �� E�� � k t+ �F,,- �r� '��' - '� �.I�� � �?y`;_ ���4.� '� ��' 1 �' � 1 � 6 ."'S� ,S�'� . �i � .. � , .P.: .�I, y� � �. a � �,� _ I r4 -'�3v9 ���� p..' '' � � '�• i �r� -x � S ���j+��.y�9 y� � "��i%d�i . ' ^,'_ w � v 3�+ 4 ��v.�t' � ��� _sd a��- �'' � �; � �I �s � %� . ,'� ��� � 'Y .8.� ! m ' � � il �� r,��'�'+; � �;�� BEE'GHC '+ � � ^�S 't.+�.�h. . � _ iC '� , j. _ . . . _ �� - , � ., '�� ���� � , .. �:- ,:�,rs - i,r�. � , �' ,g . � . - �lB�cr 'a�iY �� '�' __ ... __..., _ .�.•:. � � h; r � ��: t! S�� ir .. { ....._ - _._ I' r� .. �... 4,, �.E.:.�C1'-. . i i `� , _. .'_.L. _ � � . . � . , `II, �nY � .-.Y.. . . . ' ! )�; i l '�.�.','.'��':. .veyYldc. .. . - � f Cil�,' Flc����j kis�: i'ti�la�,� � N���..y �y,�,...�..,., «..�...�,...���..�.r,._....,�.,_.. R��W+�A `V��nwWraai....�v+awrl4li�Maw{r• 4�� -� Idlu�+wloa�lw �fwYw�V.�wxM+n+il�f�u.13.�`wrY�aMqti El '.,C�1'�nMfh'p+�M�Mkhlrl� Mw+,wnwrwws.w.r��.w.+�+o+roa �r.a..at¢aneM.�nmmtw�,arw.n.w.4AR.wd.ralun u��.,..�.,.`�•.+wr,�..�ei.'.A.� { !�wrxvr;�wr*w�p.a�a�+W�++.e*Wi�'�PriF+�rrq.Mwl «wrr..e,nrr...�..,«...,�s..r.s.p�rvee.. M.,e�rew«m�wr+lwn�{sn.ieelfr+ •w+i..�..M.�r r�'...-www.w�+rwwr T�lxa!7fMfYf�YWKeIIWIlRlC.11ml1AU�b10CY PY!xfwiM.f�PMMRxww�e�yw`�rw.YMNMI+M�+ }:.LEKI�� tAn��Ji��F.•�rthT�iwMw AlN ll(16d�L1i1�b�M�V1�qT Ilif'�iY:dit ha:�sFFFfIa551N'ec�akW+'+IF£W.,TaMX.M+dNi dMAPV�' [itib,�n��� +. src�E►Ir.w�:h+7G�aaaliMrM�eME�9rM tti..Vtl�r3 ..aaprs[st!a Wks�!`o-x:��aut �A.+�iiweW:idRifav�ri5 tti190,�{uy k �.'?i_� Yi ,M ;� y��. �. • �:h^4Ma iMl rpn�1f.ti✓:In.r' . �' �. • � .�.� . _ ..� - 'rYr�:-rl:-. 3 `.,..—.._.�_.-«. �� ..�-cr . .s...o . �. ` .. .. . . ._. . .—•�-,—. .. _�--.._ . . . . . . .. m-rvc��="_:..-:_...,- Figure 2. City Flood Risk Map ;�,���;, �_:��irla�� a€�� " _.,_:ts�,; ;.�E��ti���. ;. ;�:.���� . S e. The Putnam School is present to t�e south across Cherry Street. Dpen property cor�tair�ing one single-famify home is located to the north. Histaric residential properties are present to the east and west, across Lyons Street. 2. Property Descriptian a. Area in Acr�s: �fhe Cherry Street Cottages property is comprFsed of ap�roximate�y 1.01 acres. I b. Ground Cover: As shawn in the site aeriai photograph �Figure 3y, there are no existing irr�pro�err�ents on tl�e property, and the exis#ing �egetation consists of nati�e grasses. The existing an-site excess runoff drains to the south/sautheast i�to the Cherry Street gut#er, which flows to t1�e east and then to the north along Franklin Street to the West Vine Dri�e Drainage, #hence to the Poudre River. No "praminent features" including streams, canals, ponds, wetlands, or major utiiities ar� present on the property. +� '-�`;�� . ..._ . . � , � � : � ��,: i � � 4 �N � . . ti�,�� _ �. E�YJ t.:� � . �rr} \�" ( ..ti.. '� 1�.. . � ..�• � ....�_n r ., � °�:� . , 5. ��k � '� �.; I��.!� � .. �f.}�, .i ` ��� f:' l 317. .i�>"k�'d.y-•1� �^Z "11.(N., !�k� . ,z � �. �,� . ,� , �;€ x � h �� � � fi �ti ��,'r,�,�+�+� � � �h ...�..� �r, `� . ., , � .._ . l �_ i �•'• . F n•-,- f '� �I �.�` "-dtEJEC��f'tc.'C�Ji�Y d.. F� ? ." ��, � i �k`�4Z;,f; �! , _ �� � � r�� ` ,.�' � r�v���'�` , �, §"'�l � ,, )� i �+, � ���� :�� a � ��A � ,�� ,:, � ,�( " � -� 7' r �N � � , � .�F,k y' . ad.-,:� rr;; � 4 .� .�.G � �V f��'iF'Nf'. •' � vI�Y���R �jlp���`T �({ �: ( 1 � � RS . . . jk� �t4 i, ,(9 r .y,_ ' . a yx-sr. - r i�_9.;�3Ff�LN ��r•'' �..-sF.�y^ —�i�: - t +. R - I�r�� f�l�� ,r, ��}� ;:d � � r ,���� ��^l� A `� � Fr?.+��.f1S � �y..-.�..+g' �y�ua d t�. a, ` '` �r �� .�� a � � . 1-j'_ +. . � ' F �s� .� � '�iast�z"�" r .�.. �`te.' . � . ., _ � ��ma.�A-.w.r.'-�i ,.,.ti�s.� ,d'�'�' _ �.. � . ... . . .��. � i� �* 4..'s ,��� �' �� ,.����� n .�� '� � i.� � ..� . . � :. J �y �' . . . .. �� '.' �..'�' ��,`, �� � • �`�.t �" [ �:� . ;,� 7�: - � ? - ::4 ' . . Figure 3. 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O ppp f+l ��I � ' r `a C U � � \ � Q 1711 ONY1 N 1ii AC S , LL � S O v � ¢' f �� �' � � ... � i m c, 9 4', I �'' � i �' _`. � t r� /':� { � � Figure 5. Fort Collins Master Plan Basin Recommended Impro�emants B. DRAINAGE BASINS AND SUB-BASINS Z. Major Basin Description a. The Cherry Street Cattages project is iocated within th� West Vine Basin, located in northwest Fort Collins with a drainage area of approximateiy 2,350 acres. AccQrdir�gly, 'this drainage plan canforms to the West Vine Basin Master prainage Plan (current�y �eing updated) as well as the �ort Collins Starmwater Criteria Manual {FCSCM). b. The C�ty estir�ates that app�oxirr�ately 85% of the basin is in unincorporated Larimer County, and generally drains from west to east along fi�e flaw paths. Frequent drainage problem5 ha�e arisen on occasion because of sporadic de�elopment that occurred within the basin with torresponding averal! inadequate d�ainage facilities. Major storm e�ents over the last a�proximately 2� y�ars have created flooding prablems in the vicinity of lrish Drive and Overlar�d Trail, but not, to �he AppliGant's knowledge, specificalEy in the Ch�rry- �yans Stree#s area. Moret��er, the City af �ort Collins Master Plan Basin Recorr�mended Emprovements, as shown by the Flooding Solution Map in the West Vine Basin Master Plan, indicates that t�e current designated floodplain and ffoodway may be eliminated in the Cherry-Lyons 5treets area with future drainage improvements. f=i����! 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BWb2 l�af. b�.on�qe a �a�6� �jna���A �ab�n�s �o�n�.us (MCCS�I m!G� 21oH, 0{��J6 IUCL6926q IUJ{J6U110(72 9L692' bOUq IU�6.[' �IUb�6UJ6U�lU�.��J626 ��p 2�L9�6�162 2�JOfl�q 26LA6 .�0 20UJ6M�J9.[ UJ1�1�9�6 .��J6 ItUb8C�2 IU .[�J6 CN91JJP6L2 M��� p6 q12C�191�6q A19 9 blb6 IU ��16 6Uq O� ��J6 C�19WP6L2 �O .�N6 G6j6U�lOU iu�e� euq qizc�e��e qi�ec��A�o ��e qs�eu�iou bouq• yqqi�ious��A' sxc�22 �nuo{}��e� iz ceb�n�sq 1f7U0{{' 1"6 {I.OUI 9 bl6Cib1�9�lOU 6A6U� ��19� 6XC66q2 j�16 �-A691. 6A6Uj 6f1U0{{� MI�� {�OM OA6L ��16 ZF011U�6C�J CE19Wp61. 21S1U� C9�C(7�9�IOU2 9L6 bLOAiC�6[� �J6161U IU 'cfbf.36l1C�IX b' EXC622 2�OLUJM9�61 9Uq zNon�q 6j{6C[IA6�r� �L69� IU1�19� LfiUO{� .�OM2 {LOUJ ��16 M62� �19�� O{ ��J6 b�otec�• 1Ne (�UC{6L�I.Of7Uq C�J9UJP6L ZA2�6lU� 92 UJ9Uf1{9C�f11.6q PA fJqA9UC6q pL91U9�6 ZJ�2�6U12' �UC i`d�Z� CLOMU-qLiA6M9� 9j ��J6 692.� 6Uq o} �o� 3• l�iz iu�e.� nni�� qizc�e��s LfiUO{{ j0 9 Z�OLUJ�6CN � j1.69.�6q MIj�J ("ID 2�L9j6�I62� 9 2¢OLU1M9.�6L IU�6� MI�� p6 �OC9�6q IU ��J6 C6Uj6L O� �N6 IUA64.G6G 9Uq �L922 Ptl.�{6l2' 10 {fl�{I�� ��16 L6df91L5UJ6U� .��J9� OU6-�19�{ O{ ��16 U6M IUIb6lA[Ofl2 9L69 p6 9Ct022 A6P6�9�6q 8L692 �pA 2�166� .�fOM' I{ b0221p�6� ,�O 2fll{9C6-p926q B�f 62 2f7C�J 92 PL922 2M9�62 b�scibi�s�iou s�su�2` I'6' S-A69L 2FOlUJ 6A6U�2' j0 ��16 6Xj6U� bL9C�iC9�� L0�0{� MI�� P6 LOfl�6q �o �.eqnce Gnuo{{ b69�C2' no�nu�ea` euq bb��n�su� �osqiu� {�.ow {�edneu��A occnGuu� ( j�16 C�16LLr� z�L66� CO{�9�62 bL0�6C.� Mi�� IUJb�6UJ6U� �OM �IUb9C� p6A6�ObUJ6U� ���p� 2�L9�6�162 �.sqnciu� suq z�onniu� o{{-zite �.nuo{{• F�ILOf1��J .��J6 G6�6UjI0U bOUq MI.��J 8 COU�L0��6q t6�6926 pecK �o CN6ll� z�L66.�� ��1616P� b9f.�6LU {I.OUJ UOI.��J �O 20(1��1' q12C�19L�1U� �O CN6LLI� Z�166�' z�OlUJM9�61 I.fIUO{{ MI�� b922 bGobst.�� ��16UC6 �O ��16 692F 9Uq ��16 q6�6U�lOU bOUq' ,(�112 C�l9U�62 �N6 �112�OLIC GL91U9P6 OU-21.�6 lfIUO{{ 9CI,022 �L922� 9L69 j0 ��16 qLIA6M9��9��6� 9CC622 2�L66� OU .��16 UQ![N 2Iq6 O{L�I6 L62f1��2 IU (O� �L9GIU� �O CL68.�6 9 2�I��J.� 20fI��JM62�-j0-UOLG�1692� qL81U9Pa6 IJ9j�6LU' qIL6CFIU� MIj�JIU ��16 q621�U8�6q {�OOGb�91U .�O 9� �692� j$ IL1C�162 9pOn6 ��J6 gEE• l��z 6�.sqiu� b�eu IUC�f7q62 j�J6 IUJb04.[IU� O{ {I�� UJ9d6L19) .�O 6�6A9�6 j�16 �LO(lUq {�OOL 6�6A9�IOU O{ ��J6 �JOUJ62 blOb64.FA .�O ��J6 (iJ�62.� /�IU6 pL91U9�6 q621�U9�6q 7OO-A69L .�OOqb�91U� �'�16 OA6L9�) �L5qIUS IJ�9L7 s• 2tsb 7-Eusb�oA �n�o� �sqnc��ou binc�ticsr g�cenze o{ F�e btox�wi�A o{ ��� b�olsc� bLOC622„ j0 WIUIlUiS6 5qA6L26 IUJb9Cj2 OU L6C61AIUP M9�6L fJ179�i�A' 92 {O��OMZ: 1�16 OA6L9�� 2.�OLU1M8�6L UJ9119�6UJ6U� 2jL9�6Pv� {Ol .�N12 bL0�6CF MI�� fl�I�iS6 ��16 «�0f71-2�6b PA61�N�6q b6lC6U� IUJb61.A10t12 �01.��112 q6A6�Ob6q 21j6 12 �$a�' iu�be�nion2)� b9h6UJ6U� �f��\�' �L9A6� ��0\�� 9Uq Ob6U 2D9C6��9UG2C9biU� �$\�� ��J6 projeet wil� pay not anEy onetime stormwater de��lvpment fees, but alsa ongoing rr�anthly starmwater utitity fees, ser�ir�g to �elp achieve City-wi�ie drainage-way stabi{ity_ d. Step 4—lmplement Site-Specific and Other So�rce Controf BMPs. �his step ty}�icafly appiies to industrial and camrriercial developm�nts_ 3. Deve�topmen� Criteria Reference and Constraints a. There ha�e be�n no previo�s drainage s#udies far this site. b. There �re no known cirait�a�e studies for any adjacent properties that will ha�e any effect a� the C�erry Street Cottages project. c. Site constraints exist or� t#�e sout� and west sides by existing st�e�t5, and or� tfre north by a minor cfrainage divide and the proposed access 5#reet/alley. The site is constrained on the east by a fuEly deveioped residential neighbarhood. No other�ite constraints current�y exist or�the subjec� praperty. 4. Hydrologic�riteria a. The City of �ort Co�lins Rain�aif i�tensity-Duration-Erequency Cur�es for the 2-year and 10Q- year design preGipitation everrts, as p�-ovided in Figure RA-16 af the �CStM, serve as the data saurce far alf hycirologic computatior�s assaciated with the Cl�erry Street Cottages project. Data pra�id�d in Table RA-7 are used far Rational Method runoff calculations. b. The Rational Me�hod is used to compt�te stormwater rUnoff with coeffi�ients provided in �"abfes RD-11 and RO-12 of the FCSCM. c. Tf�e Rational Farmula-Based Detentinn Volume by �he Madi�ed FAA Method is used for detention storage calcuiations. d. Design storm recurrence intervals of 2-years (Minor Storrri] and 10Q-years {Major Storm) are used for these analyses. S. Hydraulit Criteria a. The proposed Cherry Street Cattages drainage plan is designed in aecordance with criteria autlined in the FCSCM and/or the l�rban Qraina�e and Fiood Cantrol District (tJDFCD} Urban Storm Drainage Criteria Manual. b. No ather drainage facitity desigr� criieria are use for this rfesign. c. As previously stated, there are no natural cirainageways within the subject property 1`herefore, na modifi�ations �o natural drainageways are proposed, and no "Flaodplain Madeling Study" would be required baset� an this cciterion alor►e. 6. �loodplain Regula#ory Campliance a. As stated above, the City of Fort Coiiins Fiaadp�ain Re►�iew Checklist for 50% 5ubmitCals was pre�iously 5u6mitted. According#y, it is t�ae intent af the Applicant ta comply w►rith al! a�plicable Cfty of Fort Collir�s fioodp�ain reg�Iations. 7. Mocfifications of Criteria a. Na modi#icat�o�►s are rec��e�ted at tE�is time. D. DR►�INAGE FAClLETIf DESl�N �. General Concept a. Drainage pattern5 ar� t�e sub�ect property have �►istoricaNy cansisted of runoff frnm the single-#amily resider�tial property to the north. Thi� runoff drainage has typically ffawed to the south-southeast, and that basi� drainage Pattern wil! rrot be affec[ed by this �raject. The prirnary o�jecti�e of the Cf�erry Street Cottag�s drainage design is to maintain existing cirainage patterns to the extent pa5sible, whi{e nnt adverseEy impacting aci�atent prQperties. b. As pre�iously �lisc�ssed, the pri�ary off-site rurra� occurs to the ea�t ir�to a cfeve#oped residentiaE property anc! south ta Cherry Street. With the completion nf the proposed project, the Applicant belie�es that off-site runoff may be somewhat reduced to the residential neigE�borhoad to the east through the insta�lation of on-site deten#ion in Trart A at the east e�d of the proposed project. Runofifi that previousty made its way directfy to the residentiai properties to the east will now be detafned �nd slowly released to the Cherry Street curb and gutter, potentia!!y senring to sorr�ewhat mitigate floading of tt�e prn�erties to the east. e. A list of TabEes anc� �igures used in this report is provided in the �able af Contents at th� frant of this dacurr}ent. �ach table or �gure rt�er�in listed fs lacated within th� a�plicable section Qf this report. d. Existing drainage patterns consist of primarily sheet flow to Cherry Street on the sout�. �he proposed drainage patterns direct or�-site runoff back to the narth sidE o€tne pro�erty and thence to the east and the rletention pond. Off-site runoff from the nnrth will flaw to a �rai�age swa�e that wiil cvnvey #!ow araund the detention por�d located at the east end a� the de�elopment and diseharge back ta its historie location on Cherry Street. 2. Specific Details a. Na specific design �roblems were encountered during design, aside from emp[oying an iterative process to c�esign and situate the detentian pond in best accordance with both hydrologic/hydraulic factors and the owner's preferred pond loeation and confguration. No other speci#ic or special c�esign probler�s were encaunt�red. b. The Modified FAA Methad was u5ed La size the De�er�#ion Ponci. Outiet design is in accordance with UDCM design �arar�eters, ar�d appl�cab�e equatior�s are referes�ced ir� t�e desig�, as shown in Appenc#ices B & C, Hydrologic and Hydrauli� Computatior�s, respecti�ely. The pond �o4ume was caiculated to be 4.495 aere-feet (4,158 cubic feet) for the lE�-year required deten#ion that's based on the 100-year rai�nfal!triterion for the City of Fort Collins. �'�te arrailabfe Water Quality Capture Vofur�ne (iNC�CV� is �.t�12 AF. Tf�e �orrespar�ding 1�0- year water surface e�evat.son (WSEL� is�025_9. T�ae IIVQCD.storag� volurne o€�.Q17 I�F V4►SE! is 5�124.9, yielding a WQC10 tota! maximum �ond'sng depth (at the�utlet)of 1.�ft. A� orifi�e pl�te outlet is �rovic#ed fo�contro!!ed r�iease �rogn the detentian pond. Three (3�rows of orifices, eaGh wi#h a �/2-inch-diam�ter hole will restri�c ciisfharge ta a cumulative raie of 0.0]. cfs at a pan�surface eievatio�n of 5,02Q.9, and provFd� for a 25 hoe�r pond drain time. G. Table 2 presents a summary of defention pond desigr�. �"abie 2. Detentia� Par�d Desigr� Su€nrnary � _�__�.____.._�_..._._._�.�---�------...--- ___ _____.___..__�_���._____.. �terr� - — - quantrty ;__. ___.... . . _...._�_----_.._..._---._�� . _ .�.�_.:_..._.....__...�.-----_...__... ._...__.._.�__� �._Stage-5�orage C�rve .�... SeQ A�pendix B_ Stage-CTischarge �Cunre 5ee A�pendix B � D�t�n#ion Po�d f�equiret� Vole�rne j 0.095 a-# Deter�tion Por�ti �esigr�Volurr�e D.212 a-€ Water QualEty Capture Valume 0.04� a-f Water Quafity Elevation 5,024.9-ft 5piliw�y Elev�tion 5,026.I-ft �__Por�d Freeboard � _ 1-ft� -------� Outlet Size: Orifi�e Pfate � 3 rows with 1 i4-iri hoie p�r Ov��Fiow�k/eir � ro� 12-in ' lIX3-year Qutlet Restrictor Pfate :" 1.SS-ira abov� o�tjet pi�e invert F c!. Maintenance access is ope� with no access €imitations #o the detentior� po�d and assacia#Ed o�tlet wortcs. e. There is an existing 9-foot utility easement along �he sau#h and west sides and a 6-�o�C utility and drainage easement alang the north and �ast sides o#the property. Tra�t A, the ' east�err�-most lat, wil# be dedicated €or the cietentio� p€��� a�d relate€� drair�age fe�tt���s. No stru�ures wrill be p�aeed w��hin th+� cfra��ag� e�se�er�t, ir�tluding playgro�r�d equaprnent, bu# the area �n►i�t #�� avaat�bi� fQr rieighbar��€i �ciiwits�s si�ri�g dry weather �he cletentio�a pond, atcess drive/a#9ey, and the area so�th af the praposed detQ�atian v�all will be dedicated for drair�age ar�c� utility easeme�ts, ar�d wil! be owned a�d mair�tain�d by the future homeow�ers assoeiatian. �i,�s{ p�.�i��s�s �u� ���.ortou ��+����r.o� �,��c!-� I I � i i i �92.[61, pL91U9�6 b19U2' �' J_�16 bIOI]026C� C�6A6�OL)lU6U� MI�� �J9A6 VO IUJb9C( OU 61��.16L .��J6 Clj� OL /1n62j /�IU6 Q921U I 6n6U�' � ItUb6l/�l0(72 9L692 MI�� p6 COU.�l0��6q [O L6�69Z6 9j ��J6 $-�69L �112�OLIC L9�6 qfIL1U� ��16 TQQ-A69L = MI.[�1 2�OLUJM9d6l 4f7U0{{' �ff1U0.(� {IOUJ 6X12�IU� �J6L/�10f12 9L692 .��J9� MI�) p6 COU�66.E6q .�0 9' lEJ6 C'�1.91U9�6 C�621�U bLOb026q {OL ��J12 b1.0�6C� MI�� 6{}6C�IA6�A COU�LO� C�9UJ9�6 9220CI9�6q S• p�.s�us�e �ouc�bF 0� CO�OL9q0 9Uq �6q619� L6�(7�9�IOU2 �OR6LUIU� 2�OLWM9j6L q12C�J91�6' 6' 1N12 qt91U9�6 b�9U 12 IU COUJIJ�I9UC6 MI��J C�19b�6L 7Q O{ CI�A COq6� 92 M6�� 92 9bIJ�IC9P�6 ZF9.[6 b�oniqeq iu Eo� Collluz �i�A �oqs' Zec�iou 70-5�� Elooqb�eiu �z� bs�.wiF. q' y ��OOqb�91t1 ('�26 be�.wi� sbb�ics�iou MI�� P6 bl6b9L6q IIJ 9CC04.q9tIC6 MI��J L6CIfiIL6UJ6U�2 6' f.�112 C�L91U9�6 b�9U 12 IU COIJ.Ib�19UC6 MI��J ��6 CI.�� O{ �OI.F CO��IU2 ��OOC'b�91U 16�f1�9�1OU2' {�J6 M62� /\IU6 pL91U9�6 b�9U' P' J_�1R qL91U9�6 b�9U�R IU COUJb�19UC6 MI��J ��16 Ci�� O{ EOL( CO��IU2 W92�66 p191U9�6 b�9U 9Uq 9' jE112 C�L91U9�6 b�9U 12 IU COUJb�19UC6 MI�E7 CI�� O{ EOL� CO��IU2 Z.�OLUJM9�6L CL1�6Li9 �J9Ufi9�. 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' �' p6�6U�lOU {9CI�Ij� q6ZI�U' 1N6 q6�6U�lOU bouq �O�(11U6 M92 c9�cn�s.�eq pA FNs �DECD �' CN6cK qsw suq\o� c�swe� q�ob qsai�u: �\y I OU CE16LL� 'z�L66F. bLOI�61.�A �O ��16 UOL.[�J 9LOf7Uq ��J6 q6�6U�lOU bOUq' qizc�e�.�iu� pec�C �o i�z �i2touc �oce�iou 21q62 O{ j�J6 q6�6U.�fOU bouq }o� F�s Ilt16I�026 O� COUl�6�IU� 2�OLUJM9F6l 4.fIU0{{ {IOtU ��J6 2' Qb6U C�19UIJ6� �621�t1: `�/ COUCL6.�6 qL91U9�6 2M9�6 Mi�� p6 b�9C6q 9�OU� �N6 UOL��! 9Uq 692d ¢' Z�OLUJ IU�6� C9b9C1�A: (/j�FJ' �j0 L16M 2jOLU! IU�6�2 9L6 q621aU6q �OL��712 b10�6C.�' �6U619.�6q P�jNl2 bL0�6Cj' L6�6926' UO U6M 2�OLWM8�6L 6fIUO.E{ {�OM IU 6XC622 O{ �JI2�OLIC�6XI2�IU� {�OM2 MI�) P6 3' ZbL66� {�OM C9�Cf1�9�1OU2: ��d' 66C9f126 ��J6 q6�61J.�lOU bOUq 0I7��6� 2 q621�U6q �O COU�LO� S' ZjOLUJ z6M6L C9b9CIF�: N�t/' (�O U6M 2�OLUJ 26M6L2 9L6 bLOb026q' r' Cn�ne� �sbeci��ez: �\y� y�o cn�ns�a g�e b�obozeq� 1D0 Year This is ta convert%imp.fo a C value 140-year (must insert%imp.and C pervious). Required detention ft3 I acre-ft. 'C'vakue 0.72 4157.7 0.495 Area 0.7 acres � Modifsed Modifiec4 Release Rate 0.35 M. FA7ER D.JUDISF C.LI 5/95 Nov-97 Nov-98 aETENTION POND 51ZING � TIME �TIM� INTEN5ITY Q 100 Runoff Release� Required Required cu�n ip0year �Volume Cum total Detentian Detention �. __.,.._........__--------- - -- ..----- ----...__ (mins) (secs) (inlhr)__ (cfs) _(ft^3} (ft^3) ` (ft"3) (ac-ft} �-- - . ` - -- - -- 0 0 0 0.00 0 O.D 0.0 4.0000 5 3pD 9.950 5.01 1504.44 105.0 1399.4 0.4321 10 600 7.720 3.89 2334.528 210.0 2124.5 O.D4$8 15 940 6.520 3.29 2957.472 315.0 2642.5, 0.0607 20 12D� 5.600� 2.82 3386.88 420.0 2966.9 0.058'€ 25 1500 Q.98p 2.51 3764.88 525.0 3239.9 Q.0744 -- � --- -- -- - - - - - 30 1800, 4.520 2.28 4100.544 630.4 3470.5 0.0797 _ - 35 2100I 4.O8D 2.06 4318.272 735.0 3583.3 0.0823 -- ---_ _ -- - - -_ -------- --- 40 2400 3.740 1.88 4523.904 84D.p 3683.9 0.0846 _.. . T_ ------....... _-�- A5 2700 3.460 1.74 4708.3fi8 945.4 3763.A 0.0864 �.__... ..-- - - ----- -- --- 50 3000 3.2301 1.63 4$83.76i 1050.0 3833.8 D.0880 _ -..__..-----� ------ - - 55 3300 3.430� 1.53 5439.496� 1155.0 3884.5 0.0892 __- _._._....---- ----- - - --- 60 36�0� 2.88f} 1.44 5189.184 126p.0 3929.2 0.0902 65 39QQ 2.72(} 1.37 534fi.432 1365.0 3981.4 O.R914 --�---...... . _...- ---- _. _.__...------ 7D 42aD 2.590 1.31 5482.512 1470.0 4012.5 0.0921 - --- - 75I 4500 2.480 1.25 i` 5624.6A 1575.0 4049.fi 4.fl930 80 4840 2.384 9.20 5757.696 1680.0 a077.7 0.0936 85 5100 2.290 1.15� 5886.216 1785.0 4�E01.2 4.D942 90 5404 2.210 1.t 1 6014.736 1890.0 41247 O.Q947 - _.. -_ .. , _ 35 570Q 2.930 1.07 6119.b64 1995.0 4124.1 0.0947 100 6000 2.060 1.04 6229.44 23 00.0 4129.4� 0.0948 105 5300 2.000 1.a1 6350.4 2205.0 4145.4 0.0952 _._ ---- - . ... -- 110 fi600 1.940 0.98 6453.216 2310.4 4143.2 0.0951 i15� 6900 1.890 0.95 6572.664 2415.Q 4157.7 0.0954 -_--- ---- , - ._.._..-- --.._. .. 12p 7200' 1.840 0.93] 6676.992 2520.0 4157.D, 0.0954 -- --... - ---- -- _ , . . ._. .._._....-------.... ... 125 7500 1.790 0.90� 6766.2 2625.0 414'�.2 0.0951 930 78Q0 1.750 0.88� 6879.fi 2730.0 4149.6 0.0953 'I35� 8100 1.7't0 0.86 69� 2835.Q 4145.9 0.0952 -- � -- - ,� -- ---- 140 84Q0 1.670 0.84 707fl.112 2940.0 4130.1 0.0948 145 87001, i.fi36 0.&2 7147.224! 3fl45.0 4102.2 0.0942 - ---- - -____...---- -----._ ... .. - -- 150 9000 1.600 0.81 7257.6, 3150.D 41Q7.6 0.0943 _ 155 9300; 1.57{} 079 7358.904��, 3255.0 j A103.9I 0.0942 160 96QQ 1.544 0.78� 7451.136� 336D.0' 4091.1 O.p939 165 9900 1.510 0.76� 7534.296 3485.0 4063.3 Q.0934 170 10204 1.484,' 075j 76D8.384 3570.0 4038.4 4.0927 175 10506 1.450 0.73 7673.4 3675.0 3998.4 0.0918 ------ ------ 184 10800 1.420 �.72 7729.344; 3780.0 3949.3 0.0907 I 185 11100 1.400 0.71 7832.16: 3885.0� 3947.2 0.0906 190 11400 1.380 0.70 7928.928 3990.p; 3938.91 0.09D4 _. . ._.._..---- -----..._.. ___ 195 11700 1.360 O.fi9 8039.648 4095.0 392A.6 0.090f 200 12D00 1.340 0.$8 81�4.32 4204.fl 3904.3 D.0896 205� 12300 1.320? 0.67� 8182.94A 4305.4 3877.9 0.0890 - _ 210I 126D0 1.300� O.fiS 8255.52 A4�0.0 3845.5 0.0883 2�5 1290p 1.280 0.65 8322.04$ 45'[5.0 3&07.0 �.0874 220 13200' 1.2fip �0.64 8382.528 482D.D 3762.5 0.0864 225 13500 1.240 0.62 8436.96 4725.0 3712.D1 0.0852 230 13800 1.220 0.61� 8485.344 4830.0 3655.3' 0.0839 -. _...,-- - - - 235 1a10D 1.210 0.611 8598.744 4935.0 3663.7� 0.0841 240 14400 1.200j 0.60: 8709.12 5040.0 3669.1� 0.0842 Page 1 Detention Basin Outlet 5trudure Qesign UO-�etention,Verslon 3.07(February 2417� Summary Stage�Area-volume�pischarge Relatianships �, . � ., _._� . �v� �t.- _ . ..:-�:ra➢o . ,r .�_�,�.[t..�.u.r,_ _r.�. I ,.....ai �, .d,c.d�.r ��.. . . .. i-.. i i . ., ; �._. ..,.. � .���,._�ilr�lh�:��l.�..4'J.I�JI t`Aa nlh��,:i�;E i .f� . .I..I i S�u�..Xpr�� S�q� Teea �nr YWVmr Yqum� �eyl W1fbw oe.<�iqien II�[ Ih•:] Iweol I1o+33 I+�.��I I�kl i{123.9 o.pu � 0.000 0 o,ppc3 OR� Far hesF�esults,I�dude thc ;02/. O.Ib �0 0.002 4 oopo p.pp stagesafallgradeslope 502a.1 Q.2o 336 o,D68 22 0.001 p,00 [h'nHes Ie.&ISV and F1oor] from 4hc 5-A�V ta61e on 5�24.2 Q.30 970 0,023 86 O.OpZ 0.01 Sheet'Ba51n'. i024,3 �.40 1,7fi2 0.040 273 0005 001 5ozaa 0.50 2.671 tl.061 4aa �,Dla o07 AlsoincludetheinvertsoFall 5014,5 o.Go z,7GA O.W3 720 0,017 O,UI ou[lets�eg,veriiral o�i��ce, 50]4G 07� 2,7G4 0_pf} 9y7 O.tl23 OA2 ovt�nUW gfaFG dnd splllway, 5024.7 0.86 2,764 OOG3 1,2]7 O,UM p,o2 w�e/eapplicable). SJ2d.A u.9p �,764 4.OG3 1,55a q03G 0,02 502�.9 1,W 2,�65 a.W3 1,824 0.642 U07 5025 1.I0 2,765 0.663 2,]03 0.038 0.17 5425.2 7_20 Z.�6� 0.063 2,379 O.d55 0.25 5025.2 1.30 2,7GS o063 2,GSG Q.6Gi 0.26 5025.3 1.90 2,1GL D.063 2532 O.W7 0.27 50754 1.50 T,�66 O.W3 3,2�9 b474 0.38 SOZSS 1.GU 2,7GG O.W3 3,485 4.b80 �.29 iD25.6 7„]p 2,�66 0.064 3,7G2 Q.OBG 0.311 SU757 1.HU 2,767 �0554 q,039 6.�93 0.31 5025.R I.A 2.7u7 O.W4 43a5 d.079 6.32 50259 2.510 z�76R 0,064 4,592 0_l�s 0.33 ��2G-¢rSi nValJmf 2.Stl 2,7fiN O.Ofi6 4,897 0.112 b.3p Su2G.1 2.20 2,7G6 O.U64 S,173 o.i19 a_ia 502G.2 2.30 ?�69 0.0G4 5,45fi d.125 O..ri7 502G.3 2,40 2,764 0.p64 5,727 O,131 1.0] 50TG.4 2,59 7.769 D.064 6,Opf 0,136 I.N3 561G.5 2.Fin 2.769 �.W9 6,78I 0,14a $,g5 56I6.f 2.7p 2,770 tl.tl64 6,558 O.IS] 4,20 Sa27.1-TopotFr�r.boxrd 3�2� 1��F �.�d 7,9A3 O.1B2 14,D2 Detention Sasin Outlet SYructure Uesign UD-Oetc��doR,vers�on ip7�Fel�ruary 2p17} Praject:CherryStreetCotlagcs Basin I�: "�"E1 Sta{e{H� ZoneValume(ac-tt) OwletType _ [ � E�,e, ��-_ - �'`����"'I'""O��T. . _._.-�x Zanel�Wq[VJ 0.52 0,012 oriRccalate _ �2J oqi+rt��� 2one2�190-year} 1.34 a052 Weir&Pipe{qcstrltt} p{xuqHFl��--...- OR�fYCCS F�e 70rtE3 POO1 , Example Zone Config�ration(Rete�tion Ppntl} 6.n64 7ptal User InpuC Orifice ai Ilnderdrain Outlet(Np��ly used todrain WQLV In a Fikratlon BMpy Ca{culated Parameters for Underdsain llnderdrain Orifice Invert 6epth= N/A h�distance helow the tiliratian media surtace) Underdrain Drifice Area= N/A {t� UnderdrainOrif�ce�iameYer- ryfA inches vnde�drainOrificeCeniraid= NfA feet ❑ser lnput Oriike Plate wlth one nr more oritices or Flliptical5lm Weir(typicaily used ta drein W4CV and)or EUNv in a sedimpnWllan BMP� Calculated Parameters far Vla[e Invert o(Lowest Orifiw= 0.00 ft(relatNe m 6as3n 6ot�om at Stagc-0 k� lbqOrifice Area per Row= 1.389E-n3 h'- Depth at top of Tone using Oriflce Plate= l.00 h(relaHve tv bas�n botlom at Stage=0 k� Efliptical NalLwidth= N/q feet Orf�ce Plat��,Or�flce VerYical Spacin6= A.09 inches E31iAti��I51ot Cen[roid= N/A feet OrifEcePfate�,OriflcedreaperRow= 0.2U sq.in�hes�diameter=5/2'mch) Elliptical5lmprea= N�A h+ ,�,g User fnput:Stagc and TotaF Area of Exh OriRce Row�numAeratl Trom laweat to highnst] Raw 1{teqtii�ed) Row 2(opfional) flow 3(optianaq Rovr 4{optionnp Row 5(aptianal) Row 6{optionaq Row l(option3q Row 6(ap�{Onl1} StapeofOnficeCentroid{fl) 0.06 0.30 0.60 0.90 Orificc Area(sq.iqches) 0.20 0.20 0_20 �,20 Row g(optionap Row 10(opfionaq Row 1 i optional) Row 12(optional} Row 13{optionaf} Row 14(opiionaq Raw 15(opEfanaq ftow 76(oplionalJ � SFege al Onfic¢C¢ntf0id(ftJ O<Efice Nea(sq.inches) UserinpJt:VEfliTalOfNlCe[CiYculirarReCtangular� Cal[ulatedParametersforVerticalOriflt[ Npi541ec1Gd NotSeleded NotSelected NOY54�lCICd Invert af Vertica]Orifice= H{relative to 6as'm bottom at Stage=o(t) Vertiwl OriTice Area= n� Oepth al mp of Zone�sing Ver�icaf Orifice= ft{relative m hasln bonpm a�Stagc=0 k] Vertical Orifire Cemtoid= fect Vertical OriFice Diameter= mdies Oser InpuF:Orerilow Weir(�ropboxa and Gratc{Flat ar SIapM} Caiculated Paremetess far OverRow W eir 2one2Weir Nafielecied 2ane2Weir NotSelecled OverllowWelrFrontEdgeHeigh[,Ho= 1.00 ft(reWti�elapaAnhvYfomat5tagc=OR� NehgMafGraYeUpperEdge,W� 2.d0 feCt overflow wefr Frnm Edge Length= 3� Feel Over Ffow We3r Skope�eng�h= 31G Fee� OverflawWcirSlape= 3.00 H:4{enterzerofor(latgrate} GrateOpenArea/luo-yron£�ceArea= 135.68 shouidbe>4 Horii.LengthofWeirSides= 3.00 feet OvcrflowGrate�penAreawfo0ehris= 6.64 h= Orerflow Grme 9yen Area%= 70% Yd,grate open area/tot��area Over(low Grate Open Area w/Dehris= 332 �'- DehrisClogging%= 5aY % User input:Outlet Pipe w f Flow Reslridion Pfate�Circular Oilfice,Restriciar Plate,a<Rectangular Oritice] Caiculated ParemMers for Outlet Pipe w/Flow Bestriction Plate 2one2Restrinnr NotSeiec[ed 2one2Restrictor No[Selec[ed �epth ro Imert of Ou[{et Pipe= tl.aD (c Idistance below hasin 4ortPm atStaAe=011� Outlel Orifi[e AfCa= 0.05 h� Out[etPlpeOiameser= gOn fnches OuNetO(ificeCentroid= 0.08 feet ResF�icto�Plate Heigh�Ahove vipe 3nverl= ]..58 fnches HaIGCent.ai pngle oF Restrictor Plate on Pipe= n,92 N/A radians User imput:Emer�ency Spillway�Bectangular nrTrapexotdal) Glcs�{atM Parameters fw Spillway Splllway Invert Stagc= 210 fr{relative m hasln Latmm a�s[age=a k) SpilEway Uesign Flow Dep[h= 0.79 (eet $pillwaVCrestLenglh- 2,00 feet Siage3tTopofFrec6oard= 4.49 (eet Sp�llway End Siopcs= 4,OQ N:V Basin Area at Top at Kree6oard= o 06 acres Freeboard above Max Water Surface= 2.00 fcet Routed Hydrograph Results Design Smrm Rehlm Pcrind= W4CV EURv 2 Ycar 5 Yeao la Year 25 Year 50 Year luu Year 500 Year One-Now RainF�1�Peplh(in)= 0.53 ],07 0.90 332 I.60 1.95 �1a 2.60 3.27 Calculaled AunoH Volume(acre-fl)x 0.012 �.032 O.Q23 0.039 n.n53 0.078 0.095 0.121 n.lb5 4P7iONAL Override Runaft Volume{acre-flj= p,�Iz In9ow Hydrograph Volume(acre-fl)= a�11 0-032 O,U22 0.039 4.052 4.076 0.098 o_a12 0.164 Predevelopmen[Un€S Peak Flow,9(�Ssfaae)= 0.06 6.00 0.01 0.07 o.21 a_55 pJ6 1.U2 1.49 PfetlevelapmCnt Peak 0(Cfs�= O.Q 0.0 0.0 0.3 0.1 0.4 0.5 0.7 1.0 Peak InAow�(cfs�= 0.1 0.4 u.3 OS 0.7 1.� 1.2 1.4 2.1 P4ak Ou1Flow Q(Cfs)= p,4 0.0 0.0 O.Q 0.1 0.3 n_3 0.3 0.4 Ratia Peak OutAow to Predevelopment Q= N/A N/A N/A 0.3 o S 0.7 0.5 6A o.4 Struclure ConU'a{ling Flow= Ala[a Plate Plare PIa[e Over9aw GraYe 1 Ou[let Pla[e 1 O�tlet Platc 1 Outlet Plate i spillway n�ar ve3oary m�o��n c�ac��tt�s�= N�a IJ/A a!a N/a o.a o.o a.o o.o o.o Max Vebcfty ihraugh Grate 2(fpsJ= N/A N/A N/A N/A N/A k/A N/A NfA NfA rme to Drain 97%of inflew Volume(hours)- t5 4fi 38 51 55 52 51 51 49 Time to Orain 99%ot Inflovr Volume(haurs)= 2G 48 40 54 59 56 58 58 57 MaMlmum Ponding�epih(R)= OA9 079 0.65 0.90 1.05 L23 1.43 1.6U 2.23 Area ol Ma�imum Ponding Oepth{ecres)= 0.06 D.Ofi 0.06 o.4b 0.06 o.05 0.06 9.06 0.06 Maximum Volume Smred(ecre-ft}= u.olu �,�29 0.020 0.636 0.045 0.056 0.069 o.oao 0.120 Detention Basin Uutlet Structure Design _ _ . V�-Detention,Version 3.07�Fe6ruary 20171 ------ 25 , ... ........... ... _ .. ... __ ._. �smrrcoH _ _- .. ..._........_ . � � -"' 'SWYRIXR � . . ' I —1o0vPIN , - . , . _ _. _ _'. �. I I� I � .•�1d0YN011I . . .-. . . _ . . . � � _._ Z . �SUYRIN . . . . '. . - _ "_ _ _ . . ..._. ._ . , . _... , .,_I_„_� I , � �SOYROII! -_.' _. _ _I_'_ ' ^.rn . �',-- �• � I '_..._ . . . - - _ . .. . , _ I 15YNIk � II � : : . .._ . . .__ . . . . , . _.. .. .�._...I � . 35vF WT . ., � __ . . . . � I � . . . . _ _.. .._ , T .. : - �ovR iN � . . . ,. .. . _. , . . . I ��, � � . __.___ _..__ . . . ... __`_..____ _ i,. , .... _.... I ., 1 S�5 . � iornour I__._____ — -.�..__, -.. . I I u . � .., .SrRUVi � . _ _____._�. � , .� _... . . � -�..__�. .... �, � .. _.._.... � __ � �-: �+ ' - IyN IN � �. �, � � 0 . . . .i.-_"'__ __ - _`_ _ ' � " J �`i � u . tYp�ui . . � �. _ — ------�---� —�— 1 EIIRVIN ._ ___ _ _ .._. '__ _ � I EuftVOu€ , . _ _' I. __ _.._ .' ' -... . 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Surface ;�''' -����.��-�"�� � ._;-�"���' � roughcning crcatcs variations tn the soil a���'�`` �:..�� !� `` �,,_ -='°�--�r�„.:?�. :,����� � .��,.� �� � �''--, ..�.,,�'.;� � surFace that hclp to minimize wind and �- � ,�="`� --�, -=� :��, � �� �," water erosion. DepencEing on the '�` `�,''�`„_-.�' � �"`"-""`r'r�y;�` ,�.-�'� ._,�,`� tech�iique uscd, surface roughening may � ��-��'�-„-' '�' _`���`"�3 �^�� � _ •:-"� ;�" ; �. also help establ�sh condit�ons favorable ,. - ����. � .:,,-� �.,-�� .�� .. /� to establishmcnt of�egetation. ���������"' : "� _t?.,� �,,, �` .'�'�:.'..r.�-"�+1�'��_ '� ''"` "''j A ro riate Uses ;�� �r� "� ''� . ���'��� PA P ��y.� � �.. ,�`�� �� � slll"f�Ce I"ougherilri�Cari b0 USCd#O Photograph SR-1. Surface roughening via iinprinting for tcmporary provide temporary stabi[izatian of scab�lizacion. disturbed areas, such as when reveget�tion cannot be im�nediately established due to seasonal plan�ing]urutations. Surface roughening is not a stand-alone BMP, and should be used in conjunction.with other erosion and sediment contrals. Surface rau�hening is often implemented in conjunc�ion with grading and is rypically performed usnig heavy construction equipment to track thc surface. Be aware that tracking with heavy equipment will also compact soils,which is not desirable in areas that will be revegetated. Scarifying,tilling, or ripping are better surface roughening technit�ucs ira locations where revegetation is planned. Roughening is zaot effective in very sandy soils and cannot be effectively perfoi�ned in rocky sozl. Design and Instal�ation Typica) design details for surfacing roughenin�on steep and mild slopes are provided in Details SR-1 and SR-2,respectiveEy. Surface roughening should be performed either afi�er final grading or to temporarily stabilize an area c3uring active construction that may be inactive for a shart time period. Surface roughening should create depressions 2 to 6 inches deep and approximately G inches a�art. 7'he surface of exposed soil can be roughened by a number of techniques and equipment. Honzonta.l grooves(running parallel to the contours of the land) can be made using tracks from equipment treads, stair-step grading, ripping, or tilling. Fil] slopes can be constructed with a roughened surface. Gut slopes that have been srnooth graded can be roughened as a subsequent operation. Roughening should follow along the contours of the slope. The tracks left by truck maunted ec�uiprnEnt working perpendicular to the contour can leave acceptable�orizontal depressions; Surface Roughening however, the enuipment will also compact the soil. 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Permanent sceding shouid be used t� , , '` stabilize areas at final grade that will not ����� `�'�i �� .,� � � be othenvise stabilized. Efi�ective seeding ���'; .a�``��`� � " ., �- -'�� inc�udes preparation ofa seedbed, , �` � �" �r� .�:'�� `'��� sclection of an appropriatc seed r�ixture, �� proper planting techniques, and�rotectio.n �.�`'�' s�� of the seeded area with mutch,geotextiles, ' �. �� y :; p,,;,� "� or other appropriate rneasures. ',:.�� „ . "�;`��"`--_�' � �, -- . � �, . � � ;":�►. ' .' _ ' a -"?�:- �; = Appropriate U�es . , -,. ,.; �- , _ ._- - �� . '. ,n-.�.: '�'�!'�C7'..��.' .. i - J � _ W�ien the soil surface is ciistur�ed and Photograph TS/PS-I. Lquipinent used to drill seed. Photo cain-tesy of' will remaiu inactive f'or an extended Douglas Coun�y. perioci(typicalIy 30 ciays ar Ionger), � proactive stabilizatioai n�easures should be implemented. If the inactive periacl is short-lived(on the ordea� of t�vn weeks},techniques such as surfau;roughcning n�ay be appro{�riate. For�ange�pc�iads n� inactivity,terr�porary seeding and mulching can providc effective erosion coEitrol, Fermanent seedii�g sl�ould bc used on finished areas tliat 4�ave not i�een otherwise stabilizcd. Typically, local gavernments l�ave thcir own seed mixes and timelines for seedin�;. Check j�u�isdictional require3nents for seeding and temporary staUilization. Design and Installation Effective seeding rec�uires proper secdbcd pre�aratioil, selection of an appropriate seeci mixture, use of appropriate seeciiE�g e�uipme�it to ensure proper coverage and density, and protection with mulcl7 or f�bric ui�til plants are established. The USDCM VoIurne 2 Revegeration Chapter contains de�ailed seed.mix, soil pz-eparatio��s, anc�seeding and mulclling rccommendations that may be referenced to supplcme�lt this Fact Sheet. Drill seeding is the preferred aeeding mcthod. Hydroseeding is not recommended exccpt in areas where steep slopes prevent use of drii!seeding cquipment, and even in these instances it is preferable ta hand seed and mulcli. Some j urisdictions do vot allaw hydroseeding or hydromuichiug. Seedbed .Prepara�ion Prior to seeding, ensure that areas to be revegetated have soi� conditions capable of supporting vegctatinn. O�erlot Temporary ana Permane�►t Seeding grading can resutt in ioss of topsoii,resulting in poor qua�ity subsoils at the graund surface that have Low nutrient val�e, ��netions iittle organic matter conient,fer�v soii micrc�nrganisins, Erasion Contral Yes roatin�;restrictions,and conditions less conducive to Sediment Control ro infiltratio�l of prccipitation. 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Mulching helps � , ` �� "�, '�� � +" 't�y ' � �, � *` � � { , ' � reduce erosion by protecCing bare soil �• . 3 `s�; �;�'� �t ': ' �i��+a�. �s.r��, ,� �.. �. y,;'eW,"�`�: �, .�. � ,- � r� , �:� frorn rainfall impact,increasi.ng �, r '+���' � �' � �' :�,� �z�'�Y''�,;��;.� } ` ' ,�.. 4� . ���►M�`" } "�' �a.��, r� ��.' ,,� �s r� ,,� f infiltration, and reducing runoff. ��r� � ��_ �,; � �.�. �`g� � � ; � ara����;t Although often applicd in conjunction , ��►�` ;�r ,�� �r,� � s� '",� �,�,'�,�.`,� �'�"r �''-,�tr � .��: with temparary or perrr►anent seeding, it �,� � �a;;i ` ,,�4�,�4"A��q,' �%.�'�� �,•,:��,�1` , ����'� can also be used for temporary �y��'` " �� � � '`�' `��' � ��"����„���'� , � .�r� r; �:,.� i �'��1 r:.; �J rK� !.� s r^� ��� �t .r' � p ri' � stabilization of areas thaE cannot bc �"�yr� t , ` ; j Y�1 �"��� ` r �r '��� '�4'7.'l t�iN �. . 'y r� 1� .4 } �4 �� - reseeded due to seasonal canstraints. ���!�� r'1,` s n,^ � 'j1►[�t���": �'.� ',�'' � , �, ','� a � ,i � f� ��:� y',_#�, ►�-�'-���t.f'�l�����i r �,,,'�� , � �� Mulch can be a lied either usin f '��� r �'� � �� �"' Pp b i��,•<•.��f.��'�'°``'���a��M.:,�t�''�.:'��ti�✓ ?t���,_�^,��'�����,�; standard mechanical c�ry application methods or using hydcomulchin�ec�uipmenk photograph MU-1. An area th�t was rccently seeded,mulched, that hydraulically applies a slutry of water, a�d cri�nped. wnod fiber mulch,and often a tackirer. Appropriate Uses llse mulch in conjunction with seeding to he[p protect the seedbed aEid stabilize the soiI. Mulch can also be used as a temporary cover on low ta mild slopes to kae�p temporarily sta6ilize disturbed areas where growirag season constraints prevent effective reseeding. Disturbed areas should be properly mulched and tacked,or seeded,mulched and tacked gromptly after fina[grade is rcached(typically within no longer tha❑ 14 days}o�po�tions of the site not otherwisc permanently stabilized. Standard dry rz�ulching is encouraged in most jurisdictions;however,hydramulchi�g may not be allowed in certain jurisdictions or may not be alIowed near waterways. Da not apply Enulch during windy conditians. Design and Installation Prior to mulching, surFace-roughen areas by rolling with a crimping or punching type roller or by track walking. Track walking should only bc used where other methods are impractical because track walking with h�avy equipment typicaily compacts the soil. A variety of mulches can be used effectively at construction sites. 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Description ` .- '"':_ ��"= -- _ '"�- �.�,.".'�: •�'`�,.=_ _ " :� ' ` �~ -i Outlet protection hclps to reduce erosion � ��,-1 ��`�"���"`'�► �` '� `-~ � •,.t;� .� �,..3, �rw:��.-::',�: immediately downstream of a pipe, �_ a. • culvert,slope drain, rundown or other , { � '��y:i t :;� y � .." � conveyance with concentrated, E�igh�- '�.,�-�""� ' �. � � ' r�"'� velaeity flows. Typieal outlet Protection � �~� =ca,� �� � ,g � consisrs of riprap ar rock aprons at the ��' � _ , r...r ; ' � .. �� - •-- conveyance autlet. � ,� ;�,'•s ='�"'"":�:���,�.� V- , � �_�� �,r r- ' � "w�'�-' - �. _ W� ��-._..-_� ' —�.. � ��"i`' ,,.�✓�� � _ . Appropriate Uses �. ._ � `�.:�,-.� ��J.� --t'";�'"1�--:..�=�,, w,. . � J �..F ��. �'r�+^. Outict protcction should be used when a ' � '•''.� ��`'��w�W���.�,�� y J� conveyance discharges onto a disturl�ed � ' arca where there is potential for accelerated Photograph TOP-1. Ripr�p outlet pro�ectic�n. erosion due Eo concenkrated flow. Outlet protection should be provided where the velocity at the culvert outlet exceeds tl�e maximum perrr�issible velocity of fhe material in the recerving channel. Notc: This Fact Sheet and detail are for temparary outlet protection, outlets that are in�ended to be used for less than 2 years. For permanent, long-term outlet protection, see the Major Drainage chapter of Volume i. Design and Installation Design autlet protcction to haaidte runoff from the largest drainagc area that may be contributing runoff du3•ing construction {#he drainage area may change as a result of grading). Key in rock, around the entire perimeter of the apron,to a minimum depth of 6 inches for stability. Bxtend riprap to the height of tfle culvert or the normal flow depth of the downstream channet, whichevcr is less. Additional erosion control measures such as vegetative lining,turf reinforcernent rnat and/or ather channel lining methods may be requirect downstream nf the autlet protection if the channel is susceptible to erosion. See Design Detail QP-1 far additional inforax�ation. Maintenance and Removal Inspect apron for ctamage and displaced rocks. If rocks are rnissing or significantly disp3aced,repair or replace as necessary. If rocks are continuausly missing or displaced,consider increasing the size of the riprap or deeper keying of the perimeter. Remove sediment accumutated at the outict befnre the autlet protectian becomcs buried and ineffective. When sediment accumulation is noted,check that upgradient BMPs, u3cluding inlet protection,are in effective operatin�condition. �utlet Protection Outlet protection may be removed once the pipe is no longer draining an upstrearn area, or once the dawnstrearn arca has ���etions been sufficiently stabilized. If the drainage pipe is Erosion Control Yes permanent,outlet protection can be left in place; however, Sediment Control Moderate permanent outlet protec#ion should be designed and Site/Matenal Mana ement No constructeci i�accordance with the rec�uircments of the Major Drai�age chapter of Volume 2. November 2010 Urban Drainage and Piood Control District TOP-1 Clrban Storm Drainage Criteria Manual Valume 3 nLpsv zForw Dr.srusgs CcrFsus y�sunsl nolnms 3 yloncmpsc SOIO nLpsu DxsrusSs su9 EI�oQ G�uuol D1zW.�F ZOb-3 � i i I � I I � I . � (DELtll2 YDVb1E0 ttlOH tlfltlOtSY COfOtlV00 YNO 6tlEN002 AEH21Q:f Ot AOf(14YE ]� 00l VAVIlYB!'E IN VfIlOCtlD) 3 � DIEtEkSENCE2 VkSE N01ED' CON2f11"1 MI1H fOCVf 9f1151ZD�CllONZ H2 10 MHICH DE1Vi� ZHO�fp BE �2ED MHE�1 � N(�lE`�' WV41A 9(1k512DIC110412 HtlAE BW6 DE1NIfZ 1HV1 �Vk51. EISOYi f1D6W ZIVNOVtSD DELVII"2' DI2COAE13/. Ok. LHE E'dlffllSE' ?' 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These BMPs � � �� , include a variety of rractices generaily ��� -��-�r„ focused on either graded disturbed areas �!� or coc�struction roadways. For graded �W`�� I _ "..,;_,�. areas,practices such as seeding and . . . , . mu�ehing, use of soil binders, site . • . � = _ , , ` ' z� '� watering,or other practices that provide ' � �',:- r �''s::•�,.,,•,-�:' . ";��; prompt surface cover should be used. ' � ; ,.. ; ' ',�� ��i� `�.,� For co��struction roadways,road ��.;;, • �,��;� ��r'�,?,-� '�; ' � ti �,�`'i��+P!`,��;; watering and stabilize�surfaces should � , ?=.`...�..,-�.., r_ .����3�..:�,�,.�..�•� bC GOn51dC['Cd. Photograph DC-l. Water truck Used for c3ust sugpression. Photo courtesy of Douglas County. Appropriate Uses De�st cantrol measures should be uscd on any site where dust poses a problem to air quality. Dust control ss i�nportant to conkrol for the health of construction workers and surrounding waterbodies. Design and Yns#ai�ation Tl�e following construction BMPs can be used for dust controL • An irz�i�atian/s�rinkler system can be used to wet the tap layer of disturbed soil to help keep dry soil particles from becoming airborne. ■ Seeding and rnulching can be used to stabilize disturbed surfaces and reduce dust emissions. ■ Protecting existing vegefation can help to s�ow wind velocities across the ground surface,thereby limiting the likelihood of soil particles to become aizborne. • 5pzay-on soil bindcrs form a Uond be#ween soil particles keeping thern grounded. Cheznical treatments rnay require additional permitting requirements. Potential inrapacts to surrounding waterways and habitat must be considered prior to use. ■ Placin�rock on construction roadways and entrances wil!hel}�keep dust to a minimum across the consh�uction site. ■ Wind fences can be installed on site to reduce wind s�eeds. Install fences peEpendicular to the prevailing Wind Erosifln Controll wind direction for maximum effectiveness. Dust Contro# Fu�ctions Maintenance and Removal Erasion Control Yes When using an irrigation/sprinkicr control system to aid in Sediment Control No dust control,be careful not to o�erwater. Overwatcring will Site/Material Mana ement Maderate cause construction vehicles to track mud off site. November 2010 Urban Drainage and Flood Control District DC-1 Urban Storm Drainage Criteria Manual Volume 3 Concrete Washout Area (CWA) MM-1 Description Concrete waste management involves designating and properly managing a specif c area of the construction site as a conerete washout area. A concrete washout area can be created uszng one of - , � ,. , , several approacl�cs dcsigned to receive � � wash water from washing of tools and � � ���� � � -��'��:.�'. �� yr,,-: conerete rnixer chutes, liquid concrete - � ,� ... ' ' ,:, � waste fro»n dump trucks,mobile batch " " '���,..,:� mixers,or pump trucks. Three basic �; . - .� � '�"+ apE�roaches are available: exca�ation of a `�' '" `'�*� �. : � ..'� - { pit in tlre graund,usc of an above ground ti � ., storage area, or use of prefabricated haul- -���r:•,,i�' ,�;f-0t' +y� ��, f ,� ,yy:.�,; .x.:. ,. „ r.f�'T�{,:�FiS.'� f�.�i \I�3r': , , 5�.�+2 �%.1 away concrete washout eontainers. a:�;t!'��y''�,�!�,'�� �,r�,� , ,i; �'.r l�i'�y.j.���.�y���� v' Surface discharges of cancretc washout �- �'�` �Y�'}`" '� -`� ' water Fram canstructian sifes are prohibited. Photograph CwA-1. �:xampla oi�cc�ncce�e wasl�ou�area. Note gravel tracking pad for access and si�n. Appropriate Uses Concrete washout areas must be designated on a11 sites that will generate concrete wash waYer or liquic� concrete waste fro�n onsite cancrete mixing or concretc delivery. Because pH is a poliutant of concern for washout activities, when unlined pits are used For concrete washout,tile soil must have adequate buffcnng capacity to result in protection of state groundwatar standards; otherwise, a liner/containment must he used. The following managetnent practices are recammended to prevent an impact from unlined pits to groundwater: ■ The use of the washout site skaould be temporary(less than 1 year),and ■ The�vashout site shouId be not be tocated in an area where shallow groundwater may be present,such as ncar natural drainages,springs,or wetlands. Design and Installation Concrete washout activities must he conducted in a manner that does not contribute pollutants to surface waters or stormwater runoff. Concrete washout areas may bc lined or unlined exca�ated pits in the ground,commercially manufactured preFabricated washout containers,or abovegrnund holding areas constructed of berms, sandbags or straw hales with a plastic finer. Although unlined washout areas may be used, lined pits may be required to protect groundwater under certain conditic�ns. Concrete Washout Area Do not locate an nnlined washo�t area within 400 feet Fanctions of any natural drainage pa�hway or waterbody or �rosion Contral No within 1,0�0 feet of any wells or drinking water sources. E�en for lined concrete washouts, it is Sediment Control No advisable to locate the facility away from waterbodies Site/Material Mana ement Yes and drainage paths. If siie constrainis make Yhese November 2010 Urban Drainage and Flood Control Dis�rict CWA-1 Urban Storrra Drainage Criteria Manual Volume 3 MM-1 Concrete Washou� Area (CWA) setbacks infcasiblc or if highly permeable soils exkst in the area,then the pit must be installed with an impermeable liner(I6 mil n�nimum thickness)or surtace storage alternatives using prefabricated concrete washout dev�ces or a lined aboveground starage area should be used. Design details with notes are provided in Detail CWA-1 for pits and CWA-2 far aboveground storage areas. Pre-fabricated conerete washout container information can be obtaincd frorn vendors. Main�enance and Removal A key consideration for concrete washout areas is to ensure that adequate signage is in place identifying the locaEion of the washout area. Part af inspecting and maintaining washout areas is ensuring that adequate signage is pravided and in good repair and that the washout area is bcin�used,as opposed to washout in non-designated areas of the site. Remove concrete waste in the was�iout area, as nceded to maintain BMP function (typically when fiilled to about two-thirds of its capacity}. Collect cancrete waste and deliver offsite ta a designated disposal ]ocatian. Upoi1 terminatian of use of the washout sitc,accumulated solid waste, incfuding concrete waste and any contaminated soils,must he removed from the site to prevent on-site dispasa�ofsolid waste. If the wash water is allowed to evaporate and the enncrete hardens,it may be recycled. � � . . .. ...,,._.. ��.� , ._.. ._ , . . � : " ; , _ . ;�. � 4R i -��°� '� � �° y ��� � , �rOK' .n�.. .,• i i�' ; ..,�,.. �.��' ;� '� � ... � car�A�s� " , y , ���.�: �' . r��l;�, :9�. �s N'ASk�[1JP f y � . � .�� ** ' 71�'?�, ' r *,'� >, ;� ;��' • �p+�,, � � �'�. 3 � �r �. � .� . ':�.rJ �� .,Sr. _ .. ;,91P`a � � - �* '�- . , �Y - �.�� f �i» yYiy-.. ,.. . . ' ,,.�. .. � - � .. _'f __ ti s.. - _R,;�:�,.ft1�Cf .'._�r.�.•� .3: . 1 .. .. � . f � W .���j��� _ � n,� 'w ...,��� - , � '�.:, y�, t '.-�.n-*''�p-W� d���.�.il: r»i7�+�-s"' :'"y�`.'�.�rP"3�::�"' - . . _� -, .. .�s. , ...�,.,riM�i'�r FhoEograph CWA-2. Prefabricated concrete was}�out. Photo Photograph CWA-3. Earthen concrete washout. Photo co�rtesy af CDOT. courtesy of CDOT. 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OP 111c�IlIIldC�e StOIIIl SySf�3T15. • Photo�;rapli SP-1. A topsoil stockpile that has been partially revegctatcd and is protected by silt fente perimeter controi. Design and Installation Locate stockpiles away fram all drainage systcm co�nponezits inciuding stonn sewer inlets. W�Iere practical, choose stockpile ]ocations that that will reinain undisturbed for t17e longest period af time as the phases of construction progress. Pl�ice sediment control BMPs around tlie perimetec�of tkae stock.pile, such as sediment contral logs,rock sacks, silt i'ence, straw bales aztd sand bags. Sec Detaii SP-1 for�uidance on proper establisl�ment of perimeter controls around a stockpile. Fo�•stockpilcs in active use,provide a stabf[ized desigiiated access point on the upgradieni side of the stock�ile. Stabilize the stockpile surface with surface rougheni��g, tecx�porary seeding and 3nulching,erosion control biankets,or soil Uinciers. Sails stockpiled for an extended period (typically for more tha�7 GO days)should be seeded and mulched with a temporary grass covcr once the stockpi4e is placed(typically within l4 days). Use of inulekl anly or a soil binder is acceptable ii'thc stockpile will be i�� piace fo��a a��ore limited tirrte period(typica��y 30-60 c�ays). Timeframes for stabilization of stockpiles noted in [his fact sh�et are "typical" guidelines. Check permit rec�uirements for specifie federal, state, andlor lc�ca�rec�uirements t:hat may be rnore prescriptive. Stockpiles slaould not be ptaced ial streets or paved areas unless no other practicaf altcrnaiive exists. See the Stabilized 5tagiug Area Fact Sheet for guidance when staging�n raadways is uilavoid�ble due to space or right-of-way constraints. Par paved areas,rock socks must Ue used�o��peri�netcr co�atrol and all ii�lets witl�thc potea�tial to receive seclizne��t fi�om the stockpile (even fram vehicle tracking)must be protected. Maintenance and Removal Inspect perimcter controls and inlet protection in accordance with their respective BMP Fact Sheets. Whcre seeding, mulch and/or soil binders are used, reseedin�or reapplication of soil binder�nay be necessary. When terr�porary removal of a perimeter BMP is necess�ry Stock ile Nlana ement to access a stockpile,cns�e BMPs are reinstalled in Funt€ions accordance with their res}�ective design dctail s�cYion. Erosian Control Y�es Sediment Contro] Yes SitelMaterial Mana ement Yes November 2010 Urban Drainaae ac�d Flood Cantrol Dislrict SP-1 Urban Storm Drainage Criteria Manual Volitme 3 nr.psu zFoxw Dzsrus&a Czr4scrs yssunst nojnms 3 2b-S nLf�g11 DL$IU9P6 9AC]�tOOCj COAji.Or D12FLiCf ylonsmpsx SOI O ; � I i i i$ t � � i � i zFsprrrss Fps axom7q 2na{,scs MlJsrs Fps aFocKbrls H,sz IocsEcq. �psu F�7s 2FocKb�Ic iz uo IouScz ussqsq' bzobszlA qrzbozc o�,sxcszz ms�sxrs�z suq r.sns�c�s�s ox o�szrn�2s v,yy�y-S ��ocKbijs ��us�s�zrsu� (�ys) Stockp��e Management {SP) MM-2 , ��� --� y� �.� / r � ' S� ��� _.--_� / ,� ,� � .__•»r � / i � --- 3.�� b�iih! ! SF3�KFPLE � f / �_�� / I r�--���/ � \ �`1��_ 511.F FENCE {5�E sF �Erai� FOR \ � / ��v,�:���.;rr,�r�r ����,uir�F�vrErJ'S; \ .� STDCKPI�E PROTECTION PLAN r,�nxinsur� � srr�r ��r•a�� {��.� s� �t���� �v� '� eNSra��..arioN R_�ui�Er���rs} � 1 1 �� T__.__ SECTfQN A SP- 1 _ STOCKPILE PRQTECT[4N STGCKPI�E PRaI'�CT�GPa__titi�T�,'�i;�,T10N s�4TES 1. 5E� Fi.AN VIEW FOP.: -L6CATt�N OF �TO�Kf°9LEa. -TYP£ �F STqCKPI�E �'RaT�CTSQ�l. i. IM1lSTALL P�R1A��TEt? COP�T'RfJ�$ I�1 ACCO�Qa.NCE 4VEAH CHEIR �?ESPEt�TfVE �ESiGN L�£TAiLS. ��LT F E':J::E �,5 S!-i!aVll� ;S`t T'i£ 5L4}Ck;�'�LE P�'�TECTt�^l �£TA;�S: H'�:uE`l��?, Ol'!iE4 TYPES �'fr PEREhIEYER C,0«�RQLS IiVCL�JGUVG SEQ�l��I�PlT ��D�iRDL �'JGw eR R�C�C 50C�:5 h��AY BE SE�lTAF3LE IN SOME C1F2CUM5]"ANCES Cfl3v5l�£RATlGNS FUR €��TL-Rdalr�INC THE APPROPRiATE TYE�E QF P�RIRI�TER CGf`9iftCL FCFR k. �T�CKP3LE IYI�LI�QE '�4kt��N`�tR Thi� 5TC3i,%(P�L� IS � LOCATED ON A FtRVIflLIS Oft Il,�PERVIC?L1S SURtACE. THE RELATI�JE HE[GHTS OF THE PERih4ETER CONTROL ,aASO STQCKPtLE, THE �,$ILITY QF T�EE PER�MECEP. C�]NFRaL TQ CON�atN rHE ST,riCkPILE V�ITHpUT FAIL6NG IIV iHE EVENT THAT t�R�TERfAL Ff70M T}i� 5rOCISPlLE SHIFTS QR S�IJP�tPS AGPA(�5C TtiE PER4dAETER, RTt6 �TtiER FAf.:T�{?5. 3 STA8ILIZE TWE ST�CKPILE SURFACE Ys'ITH SlJF2FACE ROL�GH�N9NG, fEhlPC3RARY �EEpINC AMp h�ULCFiING, ER+751flN �4pNTROL $t1+P]KETS, OR SOIL 61NCER5. SOiLS S7GCKPILcO FOR �.�t EXTENUEi7 PERIQD (TYRICMLLY FOR FAORE THAN 60 OAYS} 5HQlJLp (3E SEEp£i] ANd MUICHED WITH A TEh�POP,r1RY GRRSS C(}VEP, phJCE THE STOCKPILE 15 PLACEf) (TYPfCALLY WiTH�hi 19 DRYS). 115E OF AI�LCH C1NI�Y p4� A 4t�IL BINDER 15 r".CCE�'�q7LE 1F LpiE S7�3Cif�I�E t1ILL BE it� PLACE Fpfr ,4 t,A0f2E L€h�ITED T'�AA� PER1G� (7vPICp.LL'Y 3�-6II L�A'P'Sj. 4 FOR i��.iPORA.RY ST�CiCPILES {3N lFiE INiERIGR �ORiEL�h OF A CdN5tRUCTIOM SITE. 14HER� OTHER p0:'tih;G{2ADI�IVT CC?tiTkGLS, iNCLUD��vG P�ftiMEtE'� �GYTR�iL, H£2E IPJ �Lfi+.�E, STO�KPIi� FER1f�AETER COM13T�ROLS F.SAY NO"� BE F�EO:�lREQ. Navember 241 Q Urba.n Drainage�d Flood ConErol District 5P-3 Urban Starm Drainage Criteria Maiiva]Voluane 3 MM-2 Stockpx�e Management (SM) er.�rKpI�.E_ PROTFCTI�_��_PT.thl�v_T r.�;,Py�_c. tI�,T�� 1. IfV5"ECT E3MP; EACti Y10RKf3RY, A�ld h�r.i�di�,lEU TiiEbi 3t1 EhFECT1G�E (]PER�1fING CDNC11ll��l. �,iAIf�TENA'�iCE CF B'�9Ps SH���#LC B� PftJ?.CTIVE, l�iai RE�CTttlE. lNSF�EC7 BIdPs AS SQflK AS FCJSS�EILE tAND aLWAYS V11TH3N 24 HO�RS) FQLLQNiNC A STOR�� TF!RT' CALlSES S+JRFACE EP,CJSIpN, Ar�p P�RFORPA n�£C£SSARY l:i,a�N���fANCE 2. fRFQUENT OB5ERVkTICSN5 AND ��INTENANCE ARE r�ECES$aRv FQ n�RINTAtN �r,�Ps �N EFFECTIVE O�EF?kTII�G CONi3iTION INSPECIIflNS M6D CpRRECTl�v°E R�EASIS�ES 5HC�ULD HE OQCUA�ENTED THOROIiGHLY. 3. WHERE Br,SPs HAVE FP,fLED, REPAIR flR f2EPLACEhAkNT SHOULD BE IN€T1ATE� UPOPI OISrOVER'f 4f THE FAILURE. STOCKPI PROTECTION MkINTENRNC_E �TES 4 iF PEP.Il,�ETER PROTECTiC�(� l:�UST 8E �1QVEq TO ACCE55 SOIL STOC�CPILE. REP�,4C� PERIMETER Cr.lntTR4LG 8Y THE Et�� qF rHE �V�3RK[7RY. 5 STQCKPiLE PERIP.�ETER CbNTRC1LS ,v�f�J BE REl,AtiVED {)l4CE ALL iH� MATERIAL FRflM THE SrOCKFI�E HMS B£Et� US�C�. (GETNL5 iDAPTEO fftqil PARKER. Cfl�(SR,4p0, Np3 +SYN�ABLE IN AVTfhAO) r�pT�: n,,arr�� ,���isoier���;r�s H.�v� o�np ��r,��s rNkr YRP,Y ��ca� �;��e� s���c��.R� �er���s. CONSI.ILT 'NITH LOCAI_ JURIS(�iCT;ON5 AS 70 S�1H�CH DETAIL SHOU�D BF USEfl Ls'HE�v DIF�ERENC�S AP.� NOTE�. SP-4 Llrban Drainage and F€ood Control District November 2010 Urban Storm Drainage Criter�a Mai�ual Volume 3 Stockpxle Management (SP) MM-2 � n POLY LiNER �s�— � � r � � BFR�f ORA�VGE SAF�TY CO�tE. $OILfIJ':NDSCAFE hcarE��,a� � '� � � � �i��.y T/.F[�� T.] TAf2P ANCHGF - fi" PVC PIPE F�R DRAIrd:.GE 1r: ftG1*1uNE � I � CURB LINE ROAp C'L TARP At�CHC�R (CINDFR � P4LY TAf2P i r BLUCK. OR 5 GALLOE� ` \� l BUCKF'T �,?F 4yATkR) f2QA�'iWAY � I 6' h7:•X.��^~ \ r FOLY LIN�h� 1 54' � � B�RF�i �r.��ER�.4L ..--- f 0 (�RIANGULAR Sh�T E��Y,E. ���..r.�ira. � SEDIMEMT Cbhl�ROL LOG, � � n�� t��l�"��X��� r.1l��T tti��i - � � PVC FSFE ROGK 56CK. OR OFHEP. 81- E LGCAtEU iYiT�€ItJ -1 W'RAP?ED M.ATERIkL� a ORIVE �.ANE SP-2. MA��RIA�S 5TAGING G� ROADVI+AY p,4RTERI�aLi STAGING IhF ROADVlA'f5 IN.�iT�1[_I_AT�;}� �90TF5 ]. SEE PIRN VlEW F�R --LOC.4TEON C5� hiR.TFRIA� STRGtkG RREA(5J -CONTr?ACTt7k I�it�Y AUJIf<€ L�'1C.4T9�4ti1 APJ[} 512F �7F ST�,f��iVG F�R��'c +f�i7H APPF�OVRL FRGM1�i TFiE LOCAL JURISDICiIpV 2. FEAFURE MUST BE li�€5TALL�ti PR�UR f0 E7(CAVATIC3N, �RiHV,IGRK OR �E��VERY OF r,aArERi�k S. 3, hlATERIALS t�AIJS( BE SC�TfdNE{] dPJ T3iE PO�Y LI{+EER. ANY lNCIDEhJiAL MATEFtIALS D£P4aITED QN F�41�Ep SECTIJN �R ;+L�NG CURB L1N�. k#UST B� CLfA��"EO 11P PRUhIPiL�'. 4. P�LY LINER AhQ TARP CO�/ER SHOULO 8E OF 5lGfVIFICANT THICiCM�S5 7t� PREVENT GAMAGE 0� LOSS OF� INTEGRIfY. 5- 5.4NG B.'vGS F.�aY 8E SUBSTITUTED TO AN�hOR TriE CGVEF' TARP OR PRdVfDE BERMING UNDtR 1"HE BA.SE L1NEF2. 6, FE�TURE 1S NC3T iNTENtrEG FOR U5� titiYT3i VJEl" ?��TEr2?AL THAT W�LL B� GRA1NiNG ANl�/OR SPREADING 7U7 QN THE POLY LS�JER OR FOR OE�,f�LlTlt}N MATE321A1S. 7. tH15 �E;,TURE CPPJ 8E USFG FOR: -l�iTiLlTY PE�AIRS. �-�VNE��! GTHER STAGING LOC�T�OtJS AivD QPT�QPlS ARE �II��i€ED. -UTl-i�R LIt,A1TEQ APP�ICATIl3�4 A3VD SHOFtT L1U6?ATI()N STA�,�tJfi. November 201� Urban D��inage and�lood�ontrol District SP-5 Urban Storm Drainage Criteria Manual Volume 3 MM-2 S�ockpile Management (SM} P�IkTERIA�$ �T�G1NG I{V ROr,.t�'V'iAY RCNNT[IdANCE PJOT�� 1. INSPECF ;�hdP� E4CIi MlORI{pRY, AW(y M4iE+aiAiN TH�.hi fk EFFECTI!lE 4P�h',�CIPJG CQPd0iT10N. FdAINCENAMCE QF S�.{P5 $HQ�JI.�J P� PRflACT1VE, VQT REACrI�fE. !Pl5P�C� E�lPs P.S SQC�B: A.S POSSIBLE �ANE A�tvAYS wiTHiN 24 HflURS) Foi��owir�� a sfo�N r�nr c,�us�s SIJRF"ACE ERC3SION, AfJ� i'ERfQftM NECESSARY hIAIN'fENANC� 2. FREQUENT OBSEftVAT10NS kN0 hlAIt4TENANCE ARE PaEC£SS.4RY ra b1AINTAIN �P,�ps �N EFF�L'1�IVE OPERATING CC3NDI�ION 1NSPECTlpNS AND C4RRECTlVE MEASUR�S 5HUULQ 6E �OC�A4EtvrEG THflRGISGHLY. 3, WNERE BhlPs HAVE FAILED, FcEPAIR OR REPLA.CEh1ENT SHOULQ BE INITIATcD UPON DISCOVERY OF THE F.AtLL1RE_ 4. IN5PECr PVC PIPE ALONG CURB LINE FdR CL4GGING ANO 6EBRIS. REMOVF OBSTRUCTIONS FROMPTLY. 5. i;.I�FAN h'.kTER2AL FRQM PAtiIEQ SURFACES �Y 54VEEFING ClF�T '�1ACCiilMiM1IG. IJ�1TF MAN'T JUR!$pIf�TIeN$ HA�JF. Bfi�1P QETAILS THAT VARY FROhI U�FC� STANflARD �ETAILS. CGIVSULT �1'!TH LO(:d_ Jl1F?1501C11ti�iS i.S TO 1t�tiICH UE7AIL SHC+UI.L� f3E USED �`1HEN Ofl�rEftENCES ARE PvOi£0. {GErPa�S a�.�,PFE4 FRQ� qURORn, COL@AaBQ? SP-6 E1rba�i Drainage and Flood Control District November 2010 Ur�an Storm Drainage Crite�ia Manual Volume 3 Good Housekeeping Practices (GH) MM-�3 � Description �.-� ,�� �'°"� •. , � �'''� -y..._`��r.-c° , ', �'�o�,R7s",�.,. ,, ;' . Implement construction site good housekeeping practices to " � _ �,�`y ` - �- - � prevent palluti.on associated with solid, liquid and hazardous � `�y�` �`,,# construction-related materials and wastes. Starmwater `. �' ' s" Management Plans{SWMPs)should clearly specify BMPs i�pC��� including these good housekeeping practices: �;,�`'`�'^` � , ���? �� 'a._ "��;� .� ■ Provide far waste managament, ��F ` �' � � 1�� � � ' ,� : ' �i: } �� ' ` .�� ■ EstablisYs proper building material staging areas. ��'- § � � � .� � `' ■ Designate�aint and concrete washaut areas. �,_ r• • Establish proper equipment/vehicle fueling and � � maintenance practiccs. � � • Control equipment/vchicic washin�and allowable non- ��"'�'�" � -*=� stormwater discharges. " -' � " . ���'� . Dcvelop a spilE prevention and response plan. � �`"`� � �:<� Acknowledgement: This Fact Sheet is based directly on � ;,-n, � ' � EPA guidance provided in Developing Ynurstorm►vater nliotographs GI1-1 and Gl{-2. Pi•oper matericals Podlutiora Prevent Plan(EPA 2007). sForagc as�c�secondaiy contasnment for fuel tanks are important good housekceping praclices. f'hotos Appropriate Uses courtcsy of CDOT and City of Aurora. Good housekee�ing practices are necessary at all construetion sites. Design and Instal�ation The following principles and actians should be addressed in SWMPs: ■ Provide for Waste Mana�ement. Implement management procedures and practices to prevent ar reduce the exposure and transport of pollutants in stormwater from solid, liquid and sanitary wastes that will be generated at the site. Practices such as trash disposal,recycling,pro��r matcrial handling, and cleanup measures can reduce the potentiai for stormwater ru�zoff to pick up construction site wastes and discharge them to surface waters. Irnplement a cotnprehensive set of waste-management practices for hazardous or taxic materials,such as paints, solvents, petroleum products, pesticides, wood preservatives, acids,roofing tar,and other materials. Practiccs should include storage, handling, inventory,and c�eanup procedures, En case of spills. Specific practices t�at should be considered include: Salid or Constructian Waste Good Honse�eeping o Desigx�ate trash and buik waste-collection areas on- �'�nctions site. �rosion Control l�io Sediment Control l�o Site/Material Mana ement Yes November 2Q 10 Urban Drainage and Flood Control District GH-1 Urban Storm Drainage Criteria Manual Volume 3 MM-3 Good Housekeeping Practices �GH) o Recycie materials whenever possible(e.g.,paper,wood,concrete, oil). o Segregate and provide proper disposal options far hazardous material wastes. a Clean up litter and debris Fram the construction site daily. o Locate waste-collection a�-eas away from streets,gutters, watercaurses,and storrri drains. Waste- collcction areas (dur�psters, and such)are a£tcn best located near construction site entrances to minimize traffic on disturbed soils. Consider secondary containment around waste collection areas to minimizc thc lilcelihood of contaminated discharges. o Empty waste containers before thcy are fiill and overflowing. Sanitary and Septic Waste o Provide convenient,wcll-tniaintained,and properly located toilet Facilities on-site. o Locate toilet facilities away from storm drain inlets a�1d waterrvays to prevent accidental spills anc�contamination of stormwater. o Mai.ntain.clean restraom#'acilities and empty po�table toilets regularly. o Where possible,pr.avidc secondary containment pans under portabie toilets. o Provide tie-downs or stake-downs for portahle toifets. o Educate employees, subcontractors, and suppliers on locations af facilities. o Treat or dispose of sanitary and septic waste 'rn accordance with state or local regulations. Do not dischar�e or hury wastewater at the constructian site. o Inspect facilities for leaks. I#'found,repair ar replace immediately. o Special care is necessary during inaintenance(pump out)to ensure tl�at waste and/or biocide are not sptlled on the ground. Hazardous Materials and Wastes � �-`` 'h ��'��"���i`���� � ti , -;. ::� ,. o Develop and implement empioyee and ' '- -"-`�=� �'•'�� subcontractor education, as needed, on ri'"� �`' , hazardous and toxic waste handling, (.;•�;.;.�; � � ' � ,, 1;�� sYorage, disposaI,and cleanup. � - p ; � ; : � ';.:- a Dcsignatc hazardous waste-collection � � F ; � �. areas on-site. ,� ' : 9;f �� �a-." ia aY� V'r �:M1�,- "- � o Place all hazardous arad toxic material �� ��"� � " } �� "'-�', wastes in secondary containment. Photograph GH-3. Locate portable toilet Facilities on le�el surfaees away from waterways and s#orm drains. Photo caurtesy of W WE. 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Dsnslo6 a ZbtII b�6nsvyou suq gsz6ouzs y�su• ZbiII bLcncugov suq iczbouzc bzocsqmcz mnzF pc Fus z�nvu�� o Iuclnqc Fps IocsGrou o�fpc rnszpmg {scr�iFicz suq Fpc ruzbscFrov suq msruFcvsucs bLoccqncsz ru o Do uoF couqncF oFpsr.scFinipcz' zncp sz nsp�cJs Lcbsrr.z' iv �rs mezp s�ss• zswo�c ruo2F qiu sqcdnsFsla• O f126 )JIgIJ-bLG221IL6 M3j6L 26L8a 84 n6J1ICIG M9217N� {9CIrIj162 MIj]70ITf C]6(6I�EUj2' m5j6i 9IOUG C3U �ooq gonzsKssbiu� b�.sc�ics2 (�H) II�III�I-3 MM-3 Good Housekeeping Practices (GH) Spill Prevention, Cor�trol, and Countermeasure (SPCC)Plan Construction sites may be subject to 40 CFR P�rt 1]2 regukations that rcquire the pre�aration and implementation of a SPCC Plan to prevent oil spil[s i'roazi aboveground and underground storage tanks. �'l�e faci9ity is subject to this rule if it is a no��-transportation-related facility tlzat: � ■ Has a total storage capacity�reatez than 1,320 galions or a completely buried starage capacity • greater than 42,000�;allons. • Could reasonably be expected to discharge oil in c�uantities that may be harmful to navigable waters of the United States and adjoining sl�arelii�es. F�.rthermore, if the faci9ity is subject to 40 C�'n �'art 112,tl�c SWMP should reference the SPCC PE�in. To find out more about SPCC Plans, see EPA's website on SPFC at �ti��v���.c��a. =�ic,il.�E�illls��cc.l�tsn. Reportin�;Oil Spitfs In the event of an ail spill,contact the Nntional Respanse Ceater toll free at L-800-424-8$02 for assista�tce,or for znore details,visit tl�cir website: w���v.nrc.usc�.3nil. Maintenance and Removal Etfective implementation c�f good housekeeping practices is dependent on clear designati.on of personnel responsi�fe for supervising and implementing good housekeeping programs,such as site cleanup and disposal of trash and de6ris,hazardous material management and dispasal, vchicle and equipment maintenance, and othcr practices. Emergency response "drills" ��iay aid in emcrgency preparedness. Checklists may be hclpful in good housekeeping effarts. Staging and storage areas rec�uire permanent sTabilization when the areas are no langer being used for construction-rc�ated activities. Construetion-relatcd materials,debris and waste must be renioved frorr�the construction site once construction is complete. Design Details See the following Fact Sheets for related Design Detaifs: MM-1 Concrete Washout Area MM-2 Stockpile Managemeni SM-4 Vehicle Tracking Control Design details are not necessary for ather good housekeeping practices; however,be sure to designate where s�ecific practices will accur on the appropriate construction drawings. GH-6 LTrban Drainage and Flood Control District Novem6er 20]0 Llrban Storm Drainage Criteria Manual Volume 3 Good Housekeeping S-5 D�SCrip�ion a� � Good housekeeping praetices are designed '!��'""����°'"�� r.r����,�,..!_� to maintain a clean and orderl work ' �f Y r / , �' environment. The most effective firsY `y� ` +� � ` steps towards preventing pollution in � �� ,J�,�����'��`' � � � .���� stormwater from work sites simply ' p'�f � ' �Y�S �r; �.� , tnvolve using common sensc to impzove � �,�, . � ; � t the facility's basic housekceping methads. �f ,��r` I�- � -. .a��:.,� .. Poor housckeeping practices result in " '•'�' ' "`�� increased waste and potential for �. ; . '��.� � stormwater contamination. °�a� � � A elean and orderly work site reduces the �~ possi�ility af accidental spills causcd by +� '��}' ` mishandling of chemicals and equip�ncnt � ��`���" a11d Sh011�(�I'CC�UCC Sa�Cf�haZ3Cds to Photograph GH-1. Use dry ciean-up methods to remove spilled peI'sonnel. A we11-In�.lnt3ltt�(�tTilt�Il1�al�d �ateriaEs. Photo courtesy of Calorado Nonpoinl Source Program. chemical starage area will x•educe the possibility of stormwater rnixing with pollutants. Some sirnple procedures a facility can use to promote good houselceeping include improved operation and maintenance of machinery and processes,material storage practices,material inventory controls,routine and regular clean-up schedules,maintaining well organized work areas,signage, and educational programs far em�loyees and the general public ahout all of these practices. Appropriate Uses Good housekeeping practices require educatian and training,typically targeted to industries and businesses,municipal emp�ayces,as well as the general public. Practice Guidelines Good housekeeping�raetices include thcse general areas: ■ Operatian and Maintenance • Material Storage • MaterialInvcntory ■ Training and Participation. Operation and 1Vlaintenance Cansider ifnplementing the follor�ving practices: ■ Maintain dry and clean floors and ground surfaces by using hroo�ns, shovels,vacuurns or cleaning ' machines,rather than wet clean-up methods. ■ Regularly colleet and dispose of garbage and waste material. November 2010 LTrban Drainage and Plood Control District GH-1 Urban Storm Drainage Griteria Manual Volume 3 ncpso gForw Dcetus�s Cutsus yysunsl nolnms 3 G'H-S nipsu Dr.srvs&s suq�,Iooq Conp.ol DrzFucF uonsmpsL SOIO . 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' r��, .. Areas where vehicles are fezeled, } _, . . maintained,and storedlparked can be .-�``- `_ ' , ' �ol�utant"hat spols"that caza result in �'� - - hydrocarbons,trace metals,and other �, ,� ,,�,:,:- °,"'.��� olluta�ts bein trans ortcd in stormv�ater ,„�:. �„ �` ` '^ "�`�'�' '�` , l��` ' p g P . . H .. . ..! 1S- . . . _ ' �1+!. 5,:. . . . ."ct r��. .,� runoff. Proper fueIing operations,storage �= r. �- � ��'� ""� ''"` ^� ��. `? �3�' ' ., .•I�.. .f J _. of automotive fluids an�effective spill ,��;�rr� ° ' �y �i,u ' ,,, :�` clea.nup procedures can help reducc � '� � '� II �"��R��-� � ,_� contar►�ination of stormwater runaf�'from �� r� �-�"��,: , -_- .r.��4 • vehicie maintenance and fueling facilities. -- _. Fuel�related spiils can occur due to inattention durin�fueling or"to�ping off" fiie] tanks. Common activities at comn�ercial, industnal and munici��al maintealaiace shops iile�ude pai�ts cleay3ing, , PhotograpF���'-1. Use drip pans to collect leaks fi•om��ehicles until vehicle fluid replacement,and equipmeiit ,•ep�irs can be co�npleted. Phc�to cot�rtcsy of"�om Gore. replacement and repair. Some of the wastes ge�lerated at autcsrnol�ile maiute�iance facilities include sol�enis(dc�;rcasers, paint thizlners, etc.), aa�tifrceze, brake 11�iid and brake pad dust,battery acid,i��otor oil, fuel,and luUricating grease. Fleet storage areas and customer and empi�yee parking can also be a source of venicle-rc�ated contamination from leaks,ai�tifreeze spills, etc. Appropriate Uses These$MP guidclines are applicable to vehicle nlaintena�lce, fueli�lg, fleet storage and parking facilities. Be aware t11at wasl�ing vehicles and equipment autdoors ar in areas where wash water flows onto tlie ground can �ollute stormwater. Vchicle wash water i.s considered process wastewater that shoulc�not he discharged to the stonn sewer systern. Co�isult state and fcderal c�iscl�arge permit requirements for proper disposal of vehicle �vasl7wa�er, whic�i is typically aceon7plished througll�iisc�iarge to the sanitary sewer system. Practice Guidelines� Vehicle Maintenance The tnost eFfective way to mininlize wastes generated l�y automotive maintenance acti�ities is to prevent their production in YE�e first place. Consider adopting these�ractices: ■ Perfor.rn nnaintenance activities inside or ur�cler caver. W�ien repairs cannot�e performed indoors,be sure to �►se drip pasis or absorbenTs. ■ Keep equipment clean and free of excessive oil and grease buildup. ' Guidelines adapted fro�n the USEPA Men�t of BiVIPs. 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Dc2r�vsFsq {,nslrr7� sxss2 zponlq As qsz��rrcq Fo bzsnsu� z�or.urmsFsr.crruo��saq zb�IJz� �,ox cxsmbls' nsp�cJs �rtspv� �spTcjs ��iu�su�ucs' �nsjTua �uq ��o�.��s �-, Landscape Maintenance S-9 Description Proper landscape maintenance, including � �naintenance of�egetated stormwater ' � —�_-- . .., f � BMPs, is important to reduce nutrient � �... � �_ ; � n .-- _r. . � ._ and chcmica] {oadi� to t�e stonn drain '��� h��. _. .. .anr. n�r I� system, reduce nuisance flows and ,�'"� standing water in storrnwater BMPs,and , '�;' � " ` ��,,r .:,�� . maintain healthy�egetatinn that hcl:ps minirnize erosion. Additior�ally,when � '�- �� Ianciscapes and vegetated BMPs are over- � ��- irrigated,tlie ground rernains saturated � f'�' and capacity to infittrate runoffis �'-� � reduccd. s � .r �.`r`: . Appropriate Uses . '` �� Photogr�ph LM-1. Over-in•igat�on and oversprly can wash fzrtilizers avd lawn cheinicals into the storin drain systein. These f3ows can Ap�]CO�17atC 1�iWn CaTe pCaChCCs ai'E �omingle with ston�runofl'and caiise nuisance#law conditions in aj�pElCab�G t0 1'�S1C�enC131,COt11It1CCCla1, stor�nwater BMPs. Photo courtcsy of the Cily of Westniinsier. municipal,and soine industrial operations. Practice Guidelinesl Practice guidelines for a healthy lawn that rcduccs pollution duri���both wet and dry weather conditions ulclude a combii�atio�l of pr�tctices sucl�as mowing, aeration, fertilization,and irrigation. Also, sEe the Pesticsde, Herbicide, and Fertilizer Usage BMP for informaYioi� on proper use of these chemicals and Integratcd Pest Management(IPM} strate�ies. Lawn Mowing and Grass Clipping WastE Dis�osal • Keep lawn clippings and debris ou�of�utteis. When blowing walkways or mo�ving lawns, direci cquipnient so that the clippings blow back onto the lawn rather than intn t�1e street, or collect elip�ings Ulown onto the street and properly dispose of them. ■ Mulch-mowing tut�f�;rass at a height of 2.5 to 3 iiiches helps ttr�-fgrass develop deeper root systems. No more than one-third of the grass blac�e should l�e removed in a single mowing. Mulched grass clippings can return rot�ghly 25 to 30%of the needed nitc•oget�that grass z'et�uires to be healthy, thereby reducing fertilizer requirements. Avozd throwing grass clippings onto streets and sidewalks to reduce nutrient pollution to suiface waterbodies. ■ MiniEnize thateh development by nlowing at appropriate frequeticies and heights for the gz'ass type, avoiding overwatering, preventing over fe�rtilizataon, and aerating the turf. � These practice guidelines have been adapted from the GreenCO Bcst Management Pr•actices.for the Colaservatio��and Pr•otectivt� of Wate��Q�traJit��in Colorado: Moving �oti��ard Strstcrinabifitv(GreenCO and WWE 20p8). See tnis mai�ual for additional detai]and references. Navember 2010 Urban Drainage and Flood Conh-ol District LM-I Ur�an Storm Drainage Gritca-ia Manual Voiume 3 S-9 Landscape Maintenance Lawn Aer�tior� ■ Aerate turf once or hvice per year, as 3Zeeded, in the eariy sprinb and/vr late fall to aici ii� ca�tua�in�the natural precipitation during non-weed germination periods and prior to addin;organic »�aterials and fertilizers. Aeration reduces soil compactton and helps controt thatch i�� lawns wPlile helping water and fcrtili.zer move into the root zone. ■ A lawn can be aeratcd at any time the ground is not frozen,but slaould not be done when it is extrernely hot and dry. Heavy traf�ic areas uTill rec�uire aeration mare frequently. ■ Do nat use sgike-type aerators,which compact the soil. �-toles should be two ta three inches deep and na more than two ta four inches apart.Lawns should be thoroug�ly watered the day before aeratin�so plugs can be pulled more deeply artd P�osphorus easily. Mar�C al] sprinkler tteads,shallow irrigation p}�Qspharus is common3y averused lines, and l�uried cable TV Iines before acrating so �d ap�licatian s6a�id be based on those Iincs will not be damaged. 1��1 t�;sts. �'hasp3�onts rv��shing into F�rtilizer Appli�ation surface waterbodies leads to excesstve algae grau�t��. ■ App�y fertilizer when nceded to achieve a clearly p��sphc�rous c�ocs nat move ou�oF defined objective such as inczeasin�shoot growth, the soii iike nitrogen,so canstant root growth, flowerin�or fruiting;enhancing foliage color,and plant appearanee;or correeCina adcfitions are unnecessary. or preventing nutrient deficiencies. ■ Because manufactured fertilizers can be telatively high in nutrient�content, it is critica� to fo��osv the inanufacttu•er's directions, usi��g t��c anit�imunt amount cecommended. Over-application"l�urns" ieaves and may lead to water pollution,thatch buildup,excessive mowing, and weed growth. ■ Onfy apply nutrients the planta can use. Fe�tilizer labels ic�enfify prod�rct contents in terms of ratios th��t indicate percenta�e of ingredients by product weight. Sqil Testing T�cre aA-e sevcral c�ualifed laboratories in Colorado that�rovide soils tests to determine reco�runendatians far fertilizer type and a�plicarion rates. There are alsa commercially availabte quick test kits that are less acc�ate b�t ccre�Ic�be used by a homeo�vner. E�Vithout an an�tysis,a homeowner may be�uyzn�;uz�necessary fertiIizer or applyin�tac�much. A$2Q to$40 soil analysis has potential to save an owner•much more. The CSU Fxtension peagram offers a sail �estin�service. Contac#the CSU Fxtension far your counry or vrsit litt;�::;���ti��.e�t.rnlc},r�te.eclu for more iuformatiort ine�udi��g a list of 2ai�orataries. LM-2 Urban Drainage and Flood Control DisErict November 20I 0 Urban Starm Drainage Criteria Manual Volu�ne 3 ncpsu z�ozur Dcsrus�s Gr.rxcxrs yysunsl nolnms 3 ylonswpec SOIO Rzpsn Dcsius�s s�74�Iooq Couuol 7��2FxrcF I'Yd-3 gomcs: y go2x{ �n9 A' 2K?u��s�' C2R ExFsuz�ou' 5003' i ebb�resF�ouz sca ruq�csGsq �,ox nzs mpsLs pig�Jsx dns�qT oL pssnr�a-nzsq Fm��z bzszsuF� i D ybb�a rnpsn Fps Scazz rz zq�I 6cssu snq s�Isaat S'3 MssKz buoz Fo tps Sconnq �sssru�• pbt�ons� ui�r.ogsn � i qnx�u� rps enruGsc wo»Gpz� � �pu ns�T aanqA 2o�r2 qo uot �srt���ss Gn�.�s{,tsL JsFs zsb�swps�so bLsnsu�nqco�sv �i.ow�sscpmg mFo gconuginsFsc i gybb��c��rov �sFsz msa ps r.sqrtcsq pa ��� �o I�3 e,gsn SLszz c��bbiu6z s�s tsg on tps �s�nu• � nb snq 8iomyp {z as�ra�,acr,o[a' qa�sT �s�i��srnS ro r�sa oc 1nns• dyps yys�cp-ybx�� nr�cogsu ab6��csF?ou msT uoF ps ussqsq r�buox�sp {sup?sst�ou m�z comb�sxsq� I�,zbuu�giesv- uoGsz: L922 (1L51II9' B6LiIIflq9 J/jOU6 Q 2-] �'z-] j/lOII6 j/jO1IG $ff{,{,8]O aL$22' Jj]tfG IAG G2CftG If6 II1LGq �.. � O�Z O Z'I �OF �.z'I j�jOAG �6 ffIL6(I ,LgII bs2cnc 0'2 0'2-I �o� I I (obxrousl) Blns szz �s mr.sq rornylsruFsusUcs 0'2 0'2-I xoF 1 I (obFrousl) ( B1ns szz g s zs2z gc nneq obroas � gr�p y,jsrri�cUsucs 0'2-I I �o� I 1-S � F, I) � ybcil , 1mic yn nzFQ Zc Fcmpsza•c � � Znc{Sr.szz zbccrsz d B o gsxlA y,Irq- E�x1A ylonswpcxB, i D�I?9-Ydsccp to y1sA jo ylrq- 1ni� Fo Dd?q-EIn�n2t Fo gszla pcFopsx Fo yl��co su y ��ca��ou gsFs ru bortuq2�j'000 Z ' LF' � r��Ftiogsu ybb��t�F�ou usFs ,L�pls PUS-I' C2Il ExFcuziou �scowwsuqs�tou2 �,oG zbcc�gc covqrFrou2 zponlq s1zo pc couzrqszsq miisri qcFcrmtaiu� 4pc �7ssq {,ox {,eurlissz• �sr.Frlrscz zccouJwsuqs�rou2 �,oc caFsPt�zpsq Colocsqo �sN,uz sxc br.onrqcq iu F�ic FspJc pclorn• zrFc- i . �scoiuwsuqsFrou2 �,oc {su�]rssc sbbirc�Gron nsr1, sruouS rUqnzFr].bxo{cazronstz' C2f1 Exxsvzrou,2 �,eriz ou rmbsrnron2 zrtr{sccz zponlq ps zrnsbF pscK ovFo Fpc rsmn• �sc�r�rssz o{�2Fr.ssF2' 2rqsms�K2' snq qr.rncit,saz fo br.snsuF ms�sL bollnF�ou• �,sr.Frl�scr.xpsF rusqnsuenga . mpsu sb6laru� �,sxGrlrsst' pxosqcezF rF nm�or.u7lA onsr.�ps 4et�sisq sxcs o{ipc I�uqzcsbs• gss6 {sz�tj�ssFrou qo noF occnc• sbb�tsq' oFpsx {oxviz o{,{sxE�Irssz csu slzo ps z��c�a nzsq' bzontqsy FpsF onsx-rnsFcxrvg saq onsx- Fps r.rzK o�unxxrsuFz Icscpiug iuFo �conuyrnsFcx ox r.nrnr{u� og ru znx{,ecs Mstcx� �psv bxobca�A cos�sq mss sUq USFm.s1 or�snro-pszsq �cc�r�tssrz (uoF Fo pc cou�nzsq n,rFp zsrn vJsunr.c) Fo urruiw�sc . nF��rsc zbJrF sbb�icsFrovz o�2lom-xcic�zc (cou�xollsq-ceisezc) {cr.G�Iissx {,oxmz 2ncp sz IgDR' Znl��- {cutlrssFrot7 xcdmxcrosuFz 9IA6AC]II76II(2 jI7�Jj IUJbL0A6 AOjI7 f(76 fJ)7a2IC8] BIICf IIfIjSiGUf C]79L9CjGCi2FIC2 0{F]76 201I' 92 M6II 32 ICI6Uji� cunrcoumsuF{oc blsnG coo42 Go rui6conc urrGGrsuF rtbFsKs• go�� sUs1azrz cso pslb ro ?qsnGr�T 2ori smcuqmcuF rz ogsu nccqsq xo rwbrons g7c bpa2resl bi.obsu[s2 (FrIFp) o{,Fps zo�I Fo bconrqs s psFFaL „Be2suJcu�„ 2otI2 mrF�7 boor.FcxGrrxs suq IoM unFr.rsuF couFsuF u7sA ps bxc2cvF' yz s r.szn�F' zorl nsm qsns1obmsuF zrFsz' zor� coaqrF?ovz {ollommS �r.sqru� o�Fsu rro ron�sx covzrzE o�Fobzori� • /�(76II bL$CjiC$1 9QC� 9hblObCi5(G' p32G �GL[IIIS6L 5IJI]riC9ji0U OU 201I 9U3I�2I2' B6 9M9I6 (�19( 9F U79Aa r�uqzcgbs J��ru�su�ucs �-a S-9 Landscape Ma�ntenance ■ Tf possil�le, propc:rly irrigate turf following fertilization to l�el�grass utilize applied nutrients and to minimize the potential far fertilizer burn. Care sllould be Yakeil to avoid excessive ir�-igation that would rest�lt in fertilizer being washed away. Similarly, a�oid applicatioi� of fertilizer immediately prior to heavy rainfall. ■ �'alI is the best time of year to fertilize bluegrass lawns. Over-app�ication of nitrogen fertilizer in Apri[may cause grass to grow too fast be�'ore raots can support the �rowth, resulting in less heat tolerance. ■ Genei�ally, the Colorado Nursery and Gree��h�use Associatio3i r�commends waiting unti7 the second growing season to fertilize orname31ta1 (woody)plants. Commercial fe�tilizer shoulci not be used in the �ackfill wYsere it cornes in dircct contact with the roots. ■ Maintain a btiffer z.one around wcffs or surface waterbadies wt�eie fertiiizers are not applied to mini�nizc pollutio��. Consult the fertilizer product label ai�d local re�;ulations and landscape orc�inances for appropriate distances. Research iia tliis area is limited; i�owever, CSU Extension recommends a buffer of 6 to 1 Q feet fot�a�towed turf areas. � I��areas wi�h sandy soils, it is particularly important tn avoid aver-application of�crt.ilizee that could leach into groundwater. These areas inay be particularly well s�iited to slow-r�lease fer�ilizer fonns anc�conservative application rates. Lawn Irrigation ■ The approximate amount oFwater that needs to be ap�lied eac� week far an average, traditiona! lawn to supplernenr noi-�nal rainfall is listed iia Table 2. (Water utilities may provide additionaJ guidance in tcn��s of sug�estid run-Eimes for va�ious sprinklcr typcs; I�tt1�: ��ti�_��,cl�m cr����tcr.t,r��_C'c_i_nx��n.}tiun •) Table LM-2, GeneraJ Gnideline for Ap�roximate Supplemental Water for an Average Traditional Larvn (ir�ches�er week} Condition3 A ril' May June Jul Au Se t Oct2 Non-Drought Conc�itioi7s Il4" I" I'/z" 1%z" 1%4" 1" U2" During Drou�ht Restrictions (approx. 20%redu�tiot�) 1/4" 3/4" 1'/a" 1%a„ 1" 3/4" 1/2" � For establi5hed lawns,water may not be required during April. $ase decision on weatt�er conditions. 'For established lawns,water is typically not requireci ai'ter pct 15. 3Uclder less-th�a�-average rainfall conditions,ihe�moui�ts s��awn in tl�e cl7art shoulci be increased. If there is greater-tlZ�in-iaorma�r�ii2fall,theu tF�e amou:�t of supp�e�nei�tal water shauld be reduced. • Consuit with the CSU Extension Turfgrass prograr�i for recorrunendatioixs for iaxigating turfgrasses with lower water reqtiieements{e.g.blue gra�na,buffalo grass). For native grasses, irrigation may be unnecessary or lfmEted to certain coaaditions. • irri�ate the lawn uniform[y until the soil is moist to a depth of 4 to 6 inch�s to encourage deep roots. Frec�uent, fight sprinklings moisten oi11y the surface and may cause siiallow-rooted turf and ii�crcase weed seed germination. Pro�erly maintain the irrigation system Yo ensure thaf the irrigation is being applied at appropriate c�ates and to the turfgi•ass,not the sidewalk. LM-4 Urban Drainage and Flood Controi District November 2010 Urban 5to�-in Diainage Criteria Manua] Volume 3 nxpsu ZFouu Dcsius6c CxiFsr.rs y,Isunsl nolnmc 3 ylonsmpsz SOI O nxpsu Dzstus�s suq �Iooq Coup.ol D�z�.rcF PT/d-2 � i i i � t � t I I xooF says o{ Fps �cszz oz rnszpcq smsa pa xnuo�{• . bxobcz rxxr�sxrou csu mrurunss gic suiormF o�{cz�rl�ssz suq o4psr cpsm�csiz tpsF sxs Isscpsq pslom Fpc snsbo�csnzbrzsFrou (gZ)• zFor.m cncu�z suq �rsJbrua ornusr.z rneFsc sccoxqrr7B Fo �ps ussqz o�,��7c bisuFz Fo xsblscs msFcc iozG �o ILLi�SjIOU COAjCO]I6C2 BIICf MG5jI16L 26U20L2 CSl7 L6C]fIC6 M9j6I M92(6 f)� 2�IfIf�IA� O{��,ILCig5jI0U CJ(tLIIIn • �8IAj3IU ILLi�9ji0II 2a2jGW2 III p¢00(J Ob6C9Flll� COA(11jI0A MI�J f1UI.�OLU7 (II2jISAfIjI011 O{�M3F�L' ��zA75LG�� rsuqzcsbs J��ru�cu�ucs �-a Silt Fence {SF) SC-1 Description , w ,. �5:, � 1 � . {�• + ._�f�. 1�f'.` -� '�I.,� A sift fence is a woven geotextile fabr�c � � `�� . � ' f � , attached to wooden pasts and h'enched }�"� r�I ' � � ' f, �� ' � ��r' �',`�f" w���.�,.�I��'y -y.�y�_: �� � .:.��- mto the�round. It�s designed as a �.� ,��,� ;; �'� . _,.� .._ • ... . sediment barrier to intercept sheet flow , runoff from disturbed areas. Appropriate Uses � A silt fence can be used wlzere ru�loff is � �� - � � ` � ' ��' `` - - ` . _ _ . , � .. - . conveyed froin a disturbed arca as sheet y �, • ` flow. Silt fence is not designed to '� " ' 'A - �' ' � ' = •' „y �r .. j,� � . ,,�. ,,,.: �.,+� ��,,� a ,;;'w.,.� fi:; �. recei�e concentrated flow or to be used '`•'s '� `: ,. ;:' � .�; _ ��- � -"�1'"�w-'� as a f lter fabric. Typieal uses include: ' � � � =� r �` _ . _: � ;'"�� . Dawn slope of a dzsturbed area to �" "'` .r "r�. �•V' aCC�pt S�1�Gt t�OW. Photograph SE-l. Si[t fence creates a sediment bairier,fprCin� sheet flow runaff to e�aporate or infi[trate. ■ Along the perimeter of a recei�in� water such as a streaRn,�ond or wc;tland. ■ At thE perimeter of a constr�iction site. Design and Installation Silt fence sl�ould be instalIed along the contour of slopes so that it intercepts sheet f[ow. The maxirnum recommended tributary drainage area per 1401ineal feet of silt fcnce, installed alang thc contour, is approximately 025 acres with a disturbed slope length of u�to 15Q feet and a tr.ibutary slope gradicnt no steeper than 3:1. Longer and steeper slopes require additianal measures. This recomrnendation only app[ies ta silt fence installed along the contour. Silt fence installed for other�ses,such as perimcter control, should be installed in a way that will not produce concentrateci flows. For example, a"7-hook" installation may be appropriate to force runoffto pond and evaporate or infiltrate in multiple areas rather than concentrate and cause erosive conditions parallel to the silt fence. 5ee Detail SF-1 for proper silt fence installation,which involves proper trenching, staking, securing the fabric to the stakes,and backf Iling thc si�t fence. Properly installed silt fence should nat be easily puiEed out by hand and there should be no gaps be�veen the ground and the fabric. Silt fence must meet tl�e minimum allowable strength rcquirements, depth of installation requirement,and other specifications in the design details. Improper installation of silt fenee is a cammon reason for silt fence failure; however, Silt Fence when properly installed and used for the appropriate purposes, it can be hi�lily effective. Functions Erosion Control No Sedirr�ent Control Yes Site/Material Mana ement No November 2010 Urban Drainage and Flood Control District SF-1 Urban Starzn Drainage Criteria Manual Volume 3 SC-1 Silt Fence (SF) Main�enance and Removal .. ��, �- '� -��..,�,�.r, Inspection of silt fence includes observing the ��aterial for tears or holcs and checking for slumping fence afid undercut areas bypass�ng flows. Repair of silt fence typically involves replacing the damagcd � , section with a new section. Sedim�nt accumulated � • �y `� : . x �p bchind silt fence shou[d be removed, as needed to + .; t °�,��`.�i� ��' ': � � r.. ,�*,��,��` ... maintain BMP effectiveness,typically before it �:^4 ,,���s�� ,�,;� reaches a depth of b inches. , �`'' ,�, , �� ,�� r� r�� � Siit fenee may be rerr�oved when thc upstreatn area .� � -' � ��""" +�� �r���j :f has reaclied final stabilization. `�-,v�r�:'� �l�� � �,;��'�����YAr4:�;��,��y. .. ��;� M �'hotograph SF-2. When sill fence is not inslalle�3 alou� tlle contour,a"J-hook"installation may 6e apPropriate to ensure that tl�e BMP does not create conccntrated flo�v paralle]to the silt fence. Photo courtesy of Ton� C;ore. SP-2 Urban Drainage and Plood Control District November 2010 Urban Storm Drainage Criteria Manual Volume 3 napsn ZFouzr Dis�usSs Cr.rFsus Ylsunsl nojmuc 3 ylonsmpsL SOIO [lipsu Dcsnrs�s suq�,Iooq Con�r.ol DrzFcrcF 2�-3 i i I I � 2�- J ' 21�1 �EV10E i 2EClI0V1 d � i i�nlo iHE e�on�no IN DIk5EC110N 2HOMN VIAD Ok51�EN BEEN EXtlCCEt5tl1ED' Ub t 2HOMN' 1HEN t501N1ED 190 �EC' 1HICKHE22 Ot CE01EX11fE NV2 7 60Z1Z ZHVff BE 'IOINEO H2 � ZECOHO ISOIVIE tIf521 90W EX121 IN 21f1 EENCE tll '1014112 20 LHVl lA0 Ctlb2 b0212 2HV�� O�EfSfVb 21�1 EEVICE � � � € s en�siEo „ivir„ 2Nvrr eE a„ wiv� o�. zia te�nce vi rEvzi �o„ wiw v i s„ e., wi�n i e�on�no Exizii�ne � — � � _ lAb' E�M �—' 2e„—i8,� BVCKtIf� � cowevciEo � � '' eEotExtirE �� � ZIR 'cENCE ' � 66VCII�C ! 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RQC�C SOCICS c31'e !�I °�� ',� �; i � � '�',�r � '� ia+ �1 3#;� Y �f � � � � s#,� '�v �a t}��� � �,�I; ..,'� ,...: typicaily used either as a perirneter ;,1�}y�+ �4� �;ti f � n�"`j��',��'���.� w' ��IL 9 {yl � F� ��� � � � T f �f . 1 �� - c o n t r o l o r a s p a r t o f i n l e t p r n t e c t i o n. ,. � ,a �f �s 4���7 s �.�, ��a�,? j� : �,��. e 1�1 b .�LK �� � 1 � ����� b I�.:r - . When placed at angles in the curb line, � ',0.�x;! f ';« ,��'�� {, 9 ��°� rocic socks are icall referred to as �;,�},� ����'����;`'�� 1��f�s'� ��� tYP Y �1� ,� � curb socks. Roc�C socks are intended to �+s�¢����' �(�.,��`' � -" - _�- rrap se dirnent from stormwater runo ff "��"' �,, � _—"-`�`'l"'=`��"�'=- ��,��.�.. - --- _- that flows onto raadways as a result of construction activities. �. . � ' �, _ ._... - -- �---. .__ _ Appropriate Uses - - . ' Photograph i2S-1. Rock socks placed at re�ular intervals in a curb Rock socks can be USed at t�1e pet'lrileter line can h�lp reduce sedimenC loading to storm sewer inlets. Rock O�1 d1Stul�ed�T�a t0 COritT01 lOCaIlZC� sacks can a�so be used as perimeter conirols. sediment loadrng. A benefit oF rock socks as opposed to ather perimeYer controls is that they do not ha�e to be trenched or sta�Ced into the ground; thercfore,they are often used on roadway construction projects where paved surfaces are pr�sent. Use roek soeks in inlet protection ap�lications when the canstruction of a rnadway is substantially complete and the raadway has bcen directly connected to a r�ceiving storm syste�n. Design and Installation When rock socks arc used as perimeter controls,tY�e maximum recommended tributary drainage area per 1001ineal feet of rock soeks is approxizxiately 4.25 acres with disturbed slope length of up to 150 feet and a trihutary slope gradient na steeper than 3:1. A rock sock design detail and nates are provided in Detail RS-1. Also see the Fnlet Protection Fact Sheet for design and installation guidancc when rock socks are used far inlet proteetion and in the curb line. When placed in the gutter adjacent to a curb, rack socks should pratrude no more than two feet from the curb in order for traffic to pass safe[y. Tf located in a high traffic area,place construction markers to alert dri�ers and strcet maintenance workers of their p�esence. Maintenance and Removal Rock soc�Cs are susceptible ta displace�nent and breaking due ta vehicle traffic. Inspect rack socks for damage and repair or replaee as necessary, Rcmove sediment by sweeping or vacuuming as needed to maintain the functionality of the BMP,typically when sediment has acc�mulatad behind the rock sack to one-half of the sock's Rock Sock height. Funct'rons Onee upstream stabilization is complete, rock socks and Erosion Cantrol No accuniulated sediment should be removed and properly disposed. Sediment Control Yes 5ite/Materia[Mana ement No November 2010 Urban Drainage and Flood CantroI District RS-1 Urban Storm Drainage Criteria Manual Volume 3 nLpsu Zfor.m 7�cstusgc CuFcus ylsunsl nolnmc 3 IS2-S IlIA�T Disrvs�s suq�,Iooq Coup.ol 7�izrucF uoncmpsc SOI O � � 1�2— J ' ISOCK 20CK bE�51WElELi COVIlLiO� i WE2H tOfS 1HE f50CK ENCI'02f1k5E' � 2' 20WE W(1NICI6V�I11E2 WVA tlffOM iHE (12E 0� 61�1Et5 6VBk51C d2 VN V('LE6NV11AE 10 MIISE I tll'ONC tl('f 901(�1Z VND VL S„ CEN1Ef52 041 END2 OE ZOCKZ' d' MIkSE WE2H 2HV�� BE 2ECf115ED (121HC „HOC LSIhC2„ 015 MIISE 11E2 V1 8„ CEN1Ek52 VNtlXIWf1W 06ENINC Ot Ts„' kSECOWINE4IDED WINIWIIW 130�� MIDLH Ot d8„ � 7' MIBE WE2H 2HVIT BE EtlBk51CNlED Ot !0 CtlCE bOf1�115A WE2H' �LS EO(11�VfEN1' MI1H V Vt�O 2HVI"f CONibfA MILH Ck5tlDV1101� 2HOMlA ON 1HIZ ZHEEL (1j�T„ WINf1Z)' � S' Ct5f12HE0 t50CK 2HtlfT 8E Ijc„ (WINf12) IN 21SE M11H V EgVC1f16ED tVCE (V�f 21DE2) � -fOCV110N(Z) 0� 150CK 20CK6' 6fSVC1fik5ED tVCE' H(T 210E2" ' 1' 2EE 6fVN �IEM t015� 6EI5 NV2H10 Wd3' V�� kSOCK 2HVfT BE # COVk52E VCCf5ECV1E t0� CONCtSElE 't �SOCK K IN 1V 11 N N 1 Wtl1CHE2 26ECIEICN110N2 tOti I�0' < 't ��,. 0 - 2 3t„ 0 - 12 �„ SO - 22 ��„ ao — ioo S. 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DIZCO�EISA OE 1HE EVIt'f115E" � s MHElSE BViba HV�E tVI�ED' fSEbVIfS Ok5 ISE6fVCEWEVII 2HOf1�D BE 141111V1ED 1160N DOCf1WEN1ED 1HOISOf1CH�A' EEF.EClI�E ObE8H11NC CONOILION" INZbEC110N2 VND COl5f5EC1�AE YiEV2f1t5E2 ZHOf1�D BE S' 61iE6nE�t1 OBZEt5nv1i0u2 vvtD wviNlENv�nCE b'k5E �ECE22v15A 10 v�vMlvit� Bwb2 iH EI50210h' VND bEf5E0t5W NECEZ2Vk5A Wtlll�lENtlNCE' bOZ218fE (WiD VfMtlA2 MI1HM Sd HOfikSZ) tO�fOMIHC V 21015tN 1Htl1 CVf7ZE2 2fIt5tVCE WVINLENVLICE Ot BWb2 2HOf1fD BE bI50bC11AE' NOl ISEtlC11AE' IN26ECL BWbZ V2 2001A V2 1' IN26EC1 BWbZ EVCH M06KDVA' tMD WtlIN1tlIlA iHEW M EEEECIIAE 06EIiV11LiC COlADi110N' gocK �o�K �TS2) 2C-2 Inlet Protect�on (IP) SC-6 Description - � - - Inlet protection co�lsists oFpermeable �°'r-�'"���'"�"r'�>.�''""'�"-----�'.���.Q;�--...`. barriers installed around an inlet to '��'� ' �"r`�'��y�� _ filter zzuaoff and remove sediment prior �� �� to entering a storm drain inlct. Inlet protection can be constructed from rock � '��" --� socks,sediment control logs,silt fence, ,� black and rock socks,or other materials a�proved by the local jurisdiction. Area inlets can also be proteeted by over-excavating around thc inlet to form a sediment trap. r F �.:� Appropriate Uses ` ���� `` .�:;�'�� instal l pratecti on at star�n scwer inlets � �`� that are operablC during construction. Pl�a#ograph CP-1. Inlet protect;on for a curb opening inlet. Consider thc potcnlial for tracked-out sediment or temporary stockpiie areas to contribute sediment to inlets when deterrnining which inlets must be protected. This may include inlets in the general proximity of the construction area,not limited to downgradient inlets. Inlet protection is not a stand-alone BMP and should be used in conjunction with other upgradient BMPs. Design and Installation To function effcctively, inlet protection measures must be installec�to ensure that flows do not bypass the inlet protection and enter the storm drain without treatment. However,designs must aiso enable the inlet to functian without comPleteky blocking flows i.nto the inlet in a manner that causes localized flooding. When selecting the type of inlet protection, consider factors s�ch as type of inlet(e.g.,curb or area,sump ar on-grade conditions),traffic,anticipated flows,ability to secure the BMP properiy,safety and other site-specific conditions. For examp]e,block and rock socks wii�be better suited to a c�rb and gu�ter along a roadway, as opposed to silt fence or sec�iment control]ogs,whic}�cannot be properly secured in a curb and gutter setting,but are effective area inlct protection measures. Several inlet protection designs are provided in thc Design Details. Additional]y,a variety af pro�rietary products are available for inlet protection that may be approved for use by local governments. If proprietary products are used, design details and installation procedures from the manufacture��must be followed. Regardless af ihe type of inlet protection selected,inlet�rotection is n�ost effective when combined with otE�er BMPs such as curb socks and check da�ns. Inlet pratection.is often the last l�arrier before runoff enters the stomi sewer or receiving water. Design details with nates are provided for t�ese forms of inlet Inlet Protectian protection: (various formsj �'unctions IP-1. Block and Rock Sock Inlet Protection for Se�mp or On-grade �rosion Control No �nlets �ediment Control Yes IP-2. 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YVtlNA 9f11512DIC110N2 HtlAE BWb DELVIf2 1Htl1 �VVSA ElSOW f1D6CD Z1tlNDVtSD DE1VIf2' 14121tlf1' MfEl bk501EC110tA bk51015 10 0�12E1 0� EAENL' ' IZ COWbfE1E (ll�blCVffA MIIHIN d8 HOflf52)' It tl 15tlItAtVff\k5f1tA06t EAENl 12 t01iECtl21' S' IN�E1 b601EC110Vi 2HV!'f BE IlAZ1VffED bI50W61�A VF1EB IHfEl COtAZ1k5fIC110N Ot5 btlAINC -LIbE OE INfE1 bf501EC110N (Ib'1'- I6'S' ib'�' 16'd'' Ib'2' Ib'8) -f"OCVLIOIA Ot IN�EL bki01EC110N' !' 2EE hfb'N AIEM EOlS� 2C-e Iuls� b�.o�sc�iou �Ib) Cons�ruc��on Fence (CF) SM-3 Description �� . ,�..,: r� �'' . _, , „ A consEruction fence restr�cts site access ' �,,,,_ to designated entrances and exits, � deiineatcs constniction site boundaries, � i { �-�� '� and keeps construction out of sensitive �; �i ��,;�>> areas such as natural areas to be � �"'-:�� Fi�.;��, preserved as apen space,wetlands and • 4 . � � �v •�;��. riparian areas. ' r -,°� , p � �� �,�� y . t�Y. - 1,. .. � �,'.•� �• 11 . `e '� : � .. ,+�F.�{Y� 4 ' .} 1 � 4. •�1T Appropr�ate U�es ,�S�;Y�- w � ' ��,°f' �.,. ` �� ►. F. ., •r"� �.� �� �� r ,+, o � �. _ . ,�„�� A canstruetion fence can b�used to � A J `'�� 'E � '� ��` "� ,;` � �j�.`� ,� . �, �� t,, � delineate the site perimeter and[ocations ���';�,l�� � �,�, .�f,�,�� within the site where access is restricted t0�)COteCt ElatUla�CeSOUCCCS SUCh aS Pl�otpgr.iph CF-1. A cot�struction Fence helps cfelineate are�s whe��e existing ve�etat��n is being pzrotccted. P1�oCo cpw�tesy oCDotigl�s wetlands,waterUodies,trees, and othcr Couuty. natural areas ofthe site that slaould not be distt�rbed. If natural resource protectian is an oblcctive,the�1 the coustruction fcncing should be used in combivation with other perimetcr control BMPs such as silt fence, sedru�ent co�ltrol logs or similar measures. Design and Installation Construction fencing l21ay be chain IiElk or plastic�nesh and should t�e installed followi�ig manufacturer's reconunendations. See Detail CF-1 for rypical installatioils. Do not place eonstruction fencing ii�areas within work limits of�1laclainery. Maintenance and Removal • Inspect f�nces£or daznage; repair or replace as i�ecessary. ■ Fencing should be tight lnci any areas witli slumping or fallen posts should be reinstalled. • Fencin�should be�emoved ance construction is complete. Construetion�'ence Functions Erosion Control No Sedinzcnt Contro] No SitelMaterial Mana ement Yes No�ember 20�0 Urban Dr�iilage and Floa� Contz'ol District CF-1 Urban Storm Drainage Criteria Manual Voiunle 3 SM-3 Construction Fence {CF} [F--.—.[F ---cr f �n���;e c,��, r��. �C i � STUDDE�7 STEEL � /l 'EE P053 ! / r' or�rrcE �tsi�vt� 5 ����ra ��4ri5TRUCnO�i �EcvCE � Et1;Tll•;G OR APPP,O:�EQ E�uaL � GRAL�£ i { -� -- �. . , . ,• r.�in; �. � j�l : : i o' na:.x � SP�s::fNG ` / . \ 1� . . --� � . . � � Srl9GC��D STEEL i ^ TEC POST 4' �v11hd �_ CF- 1 . PLASTIC MESF� �ONSTRUCI�IC�N FENGE COfV5TP,UCT10N FENCE INSTALLATIbh! NQTES t_ SE[ PI.}if3 vIEW F{3�: -LOCnTiON 0�" CON57RUC71�N F�r�CE. 2. CONSTRUC7IQN FEPdCE SHUVrN SN�.LL 8E iNSTALLED FRIUR TO ANY LAtVD �ISTUP.EINC ACTIvlT1E5 �. COIvS7R��1Gr�G�v �Er�C� 5s�?,L� �� CGti!P35�G QF GRAN��. C��htT�:CTOF-�R,�+:�E n��FER�A� FNAF '�S ��'f t�AS�' 4' HiGN. k�Ef�L PGSTS S�'jOULt� tiAvE R PLASTiC �nP F�iR SAFE�I', 4_ SFU���fl SiEEI� TEE P�5�S SkiAL.L EE ;�T1�1Z�G 70 SUP��P.T TS�E CpNSTRUCiIOM FENC� I�.�i;1�IL1M SPACING FOR STEEL TEE �95T5 �HRLL �iE 3�'. 5 C�JPJSTRUCTIQtv FENCE SHAL`� 8E S�CJRELY FRSTEhlED TO THE TO+�, tdi�DLE, AN� BOTTUfA OF EACH P�ST_ CF-Z Urbait Drainage and Plaod Contra�District Novernber 2010 Urban Sto�rrrt Drainage Criteria Mant�a[ Volu�e 3 Construc�ion Fence (CF) SM-3 ����"FtI,��TIQN FE�F fit�qINTE�l.AIVCE NOTES 1. INSPECi �hEP� EACt� 4YC7RK�J.AY, Af�lp AdAIIVTAIN THEM I�1 EFFECTIVE Ch'ERATI�lG COS3DETIC3N. B:SAINTEi`lP.N�E OF E3P.IPs SH4F_1L0 BG PRORCLI�lE, nIk7T REACFk�{E. IPISPECj 8lAPs A.S �iZON AS P�SSkBLE (ANG ALYlArS �1:�T�IN 24 HOUR;J FpLLaV1�NG � STaRrh THAT CAUS£5 SJRFACE �W,ti�SlON, AtJD PEkf{3f2h4 ivFCESSAPY MAItViENAiVCE 2. fR�OUENT UBSERVA'CIONS AN� M1�RINTENHNCE ARE NEC£SSARY i0 P,�kiEvT�«i BMPs 3N E�'FECTlVE �PERAiIfJG C�NDITIOtJ fNSPECiiCINS AiVL} GbRREGTIV� l�EASURES SHOULD EE �G}CU�AEN�F.D FHL3RQl1GHLY. �. VJHERE BMPs HAVE FAILEE7, REPAIR dR REPLACEh�ENT SHpUL(] SE IMITIATEI? UPQfJ aISCOVERY OF TME hAfLl1R� 4. CONSiRUCriON �ENCE 5HALL BE RERAIRECS OR REPLACE� 4VHEN THERE ARE SIGNS OF DAMAGE SUCH AS RIPS OR S�,GS. GONSTi2VCfIQN F[NCE i5 FO REhlAkN w PL4CE VNFIL T�iE UPSTREA�,1 OISTURBEp Rf?�A IS SSA�IL17Ea kM1'� �'PROVE� 8Y T'HE LQCAL .�UFt15QICT10N. 5, IVNEN CONSfRUCRON FE3VCE5 AR£ RE1,1QVEq, Al.l. L1�SIURBEC7 AREAS A55�Ci?,TED WITH THE lf�ST�sL�ATION, �,4?al�1TENANC£, AND/OR P,CAIOVA.� �F THE FkNCC St-€AL� B� CRl1EREC3 VliTH TpPS�EL, SEEE��D ANp h1EJl.Gt�EL, OR pTN�R+,Y15E 51ABfL,iZEO A5 RP€'r��VEL 8Y LC�r�i. J�RISDECTEON. N,�TE_ MAP�Y JURISOICr�CtiN5 HAVE 8h9P OErRILS rF#AF VARY FR4h4 11DFCQ ST.AYDAR� DETAILS. CONSULT 4Y17ti ��CP.L .iliRlS�l��iC]N5 �.S �O 14hiICh€ �ErA.IL SH��ULE� gc l[5�❑ 4l'NE�1 DIFFERErJCES ARE ivO�E�. (pETP7L FDAPT�p FR�3�E T0141N QF PAF!4CER, C-4L�4AD. f�iOT AVRILABLE IH ASpTQGFD) November 20I0 Urban Drainage and Flood Control Disteict CF-3 Urba31 Stnrm Drainage Criteria Manual VQluine 3 Vehicle Tracking Control (VTC) SM-4 .�. Description , . ` __�;,-- � R� '�r' Veh�cle tracking controls provide � ;. : ` ��' '�:„T,._�� .�. , � ,� ' stabilized construction site access where � ` `' ' ` "`' r,. i� '„'�,. , ve�7ie�es exit the site onto paved public v .�"` _ .;,,,�. .�, roads. An effcctive vehicle tracking �" ` �•-�F � .` ''{ ���� � ,,:;'��a-4 contro]helps rerr►ove sediment(rnud or " . ,,:�^ � � � �: ,; dirt}from vehicles, reducing tracking onto 'r�'"' �" �` .� " �,�� . the�aved surface. , _ ,_.,,,.�� , . .� �, � � :; . : Appropriate Uses �.�- � �: ,�-, ; � � Y _ ti --::� A 1k �i �.'�� .a�,+�.. � .r,�r t �.- '°"'F •'��`^"�.� ��[a�»' 'r� ��_�1����i'� -� � L `` � .,Fi��� �:+�r+ 7•�`L-�=., ��� -� � � � F .�.�.. �:� Implement a 5tabilized eonstructipn �`''�"�`�`-'r•'�" '"��"`� �—�`=�`=�~'--- ''��''-``� entrai�Ce or vehicle traGkin�Control where Photograph VTC-l. A vehicle tracking control pad construccecf with �I'CC�UCrit��aVy V�hlCle tC1ff1C CXtIS t}]e properly sized rock reduces ofF-site seditnent tracking. construction site onto a paved roadway. An effective vehicle tracking cor�trol is particularly important during the following conditions: ■ Wet weather periods when mud is easily tracked off site. ■ During dry weather periods where dust is a concern. * When poorly drained, clayey soils are present on site. Although whee�washes are not rcc�uired izt designs of vehicic Cracking controls,they may be needed at particu�arly muddy sites. Design and 7ns�al�ation Construct the vehicle tracking cont�-ol on a level surface. Where fcasible,grade the tracking contro] towards the construction site to reduce off-site runoff. Place signage,as needed,to dizect eonstruction vehicles to the designated exit through the vehicle tracking contral. The�e are severa� different types of stabilized constructiott en#rances including: VTC-1. Aggregate Vehicle Tracking Control. This is a coarse-aggregate surFaced pad underlain by a gcotextile. This is the most common vehicle tracicing control, and when properly maintained can be effective at removrng sedime�t from vehicle tires. VTC-2. Vehicle Trac�ing Contral with Canstruction Mat or Turf Reinforcement Mat. This type of control may be appropriate far site aceess at very small construction sites with low traffic volume over vegetated areas. Although this application daes not typically remove sediment from vehicles, it helps protect existing vegetation and provides a stabilized entrance. Vehicle Tracking Control Functions Erosion Control Moderate Sediment Control Yes Site/Material Mana ement Yes November 2010 Urban Drainage and Flood Control Distriet VTG1 Urban Storm Drainag�Critena Manual VolumE 3 SM-4 Vehicle Track.ing Control (VTC) VTC-3. Stabilized Construction EntrancelExit with Wheel Wash. Tl�is is an aggregate pad,similar to VTC-1,but vicludes ec�uipment for tire washing. The wheel wash equipment may be as simple as hand-held power washing equipment ta n�ore advancc proprietary systems. When a wheel wash is provided, it is irnportant to direct wash wafier to a sediment trap prior to discharge from the site. Vehicle tracking controls are sometimes installed in combination with a sediment trap to treat runoff. Maintenanc� and Removal Inspect the area fnr degradation and ' ' } { , ��'' .;_, ��� a'�„�,."�;���� r:,�i��.: �� replace agbregate or mat�rial used for a ri� ���� �'' yy �. �, .�--� stabilizcci e��trance/exit as needed. If the ; ��' area 6ecomes cloggecf and ponds water, �, :, ,; __ , ,��_"_ �22� ���; _. ��--�`~� removc and dispose of excess sediment .����� �,--- 1 or replace material with a fresh]ayer of �- ~r' aggregate as necessary. :. }".- �,� �_ ,� . With aggregate vehicle tracking eontrols, �'=� ��''��� ��� �`��� p ensure rock and debris from this area do ',=�`,%. '�. ' <<�,, not enter the public right-of-way. �, , ,. „ ,�'`,� , � ,p,�c�:,; ,, . < < � ��. . £I'�E�$ ,�S S�i�� _ i �y ti L;t ' rk'C , � � r .s }4� t Remave sedirnent that is tracked onto the �s. � - ; ��4 a . �� �; � r�F'�, . 4�'�!'�7��"R.�y'ti public right of way c�aily or more ° ti _a � �r�"'�e c -� ' , r��'�' �rh� �r � ` s�' rk � rt � � a�`� '+ tih�`ti r: frequently as needed. Excess sediment `• � � ., {u�I.� � 3< -. ,•`����, v�� �'`�� y •�;� � �', , }'� ��,,,. ��y � Y,�r�. � �. in the roadwa indicates that the �-� .��::=��S�•i�;i=�'�'s ;�r =+ �^h�'� .,�'� '� y +*r- .� * °�^' f �i Y�hY�:'�ti ..'^'`{ ��.iy . c _.'v', �^`it A f�`-.�.�5.'e:'fti�_v1� stabilEzed construction entrance needs " �"}f . � � - . „ ,. r:, ,!`� i. ^�"' Y, _ -�. _ malllterial]Ce. Photo�raph VTC-2. A vehicle tracking control pad with wheel wash facility. Photo couriesy of Tom Care. Bns�ue that drainage ditchcs at the , entrance/exit area remain clear. A stabilized cntrance should be removed only when tElere is no]onger the potential for vehicie tracking to occur. This is tygically after the site has been stabiliaed. When wheel wash equipment is used,be sure that the wash water is discharged to a scdiment trap priar to discharge. Also inspect channels conveyin�the watez-frozn the wash area to the sediment trap anci stabilize areas that may be eroding. Whe��a construction entrance/exit is removed, excess sediment from the aggregatc should be removed and disposed of ap�ro}�riatcly. 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Description �. .�.._�- .... _.. �. . A stabilized staging area is a clearly � designated area where constrtiction J` equipment and vehicles, stockpifes, rvaste � �a��� _ ��.� �'" bins.and other construction-relateci `"� "�"�� � �, ,���� • r•.c i�i� materials are storcd. The contractor ���—�..�� ` �� i�,, of#ice trai[er may also be located in this � ��3�r; area. Depending on the size of the ' � � � '�;•" construction site,mare than one staging , , y r_� t��.. area may be neeessary. • �..� ^� �yM , .���' :�y _ , � ��,� �-� � Appropriate Uses t,, ��, � , ° , , ,,�f , r;' , � � � ��� ,. .�.,��� �M�.�� .� • , ,� a .,-•r:'.'t"�.i:f.'-.'e':�!-1'.;i1.4,fd,�,r,.���.j.i.�,:��'�-�•.'�:�,�.�t�r.�.:�.,,.`.--..:;,ib; -.�-' . Most construction sites will requirc a ' StaglElg 3re�, whiCh should�e C1C�T'ly Photograph SSA-l. Example of a staging area with��;ravel surlac:c to dGS1�n�.tEd lll$�M.�'C�t"1W1I1g5. T}le �ayOUt prevent mud tracking and retluce iunoff. Photo courtesy of�Douglas of the staging area Enay vary depcnding on county. the type of constructinn activity. Staging areas located in roac�ways duc to spaee constraints require s�ecial measures to avoid materials being washed into storm inIets. Design and Installation Stabilized staging areas should be completed prior to other construction activiti�s beginning on the site. Major co�nponents of a stahilized staging area include: ■ Appropriate space to contain storage and pravide for loading/unloading operations,as well as parking if necessary. ■ A stabilized surface,either paved or covered,with 3-inch diamcter aggregate or largcr. ■ Perimeter controls such as silt fence,sediment control logs, or other measures. ■ Construction fencing ta prevent unauthorized access to construction ma�erials, ■ Provisions for Good Housekeeping practices related to materials storage and disposal,as described in the Good Housekeeping BMP Fact Sheet. ■ A stabilized construction entrance/exit,as described in the Vehicle Tracking Control BMP Fact Sheet, to accom�nodate traffic associated with material delivery and waste disposal vehicles. Over-sizing tlle stabilized stagin�;arca may result in disturbance of cx�sting vegetatian in excess of that required for tl�e project. This increases costs, as well as rec�uirerr�er�ts faz-long-ter�n stabilization fallowing the Stabilized Staging Area construction period. When designin�the stabilized staging area, minimize tl�e area of disturbance to the extent practical. ��netions Erosion Control Yes Sedimcnt Control Moderate Site/Material Yes November 2010 Urban Drainage and Flood Control District S5A-1 Ur6an Storm Drainage Criteria Manual Volumc 3 11Lp9II 'j,jOLUI DL3IU3�6 CLiFGLiff�9Uff9I nOIfiU7G 3 22FI-S [lipsu DLsrvs�s snq�iooq Couµol Drzu?cF ylonsmpcz SOIO ';� i I i I concc blsuucq �oi Fpc qcnslobmsuF� sbbxobxrs�c �suq�I�• zFs�ru& sccsz zponlq Fpca ps bscwsusuFlA ztsA?I?scq mrFp ncgcFsFrou ox o�per.zRz�scs q�z6o2cq� gr zomc cszsz' tp�z �nirr r.cdmrc qr2bozs� o{ covFsunusFsq 2orl gom cdmbmcuF IcsK2 m su 3 �cu covzwncFrou iz comblcFc' (I6ALi2' nunzcq 2Focxbrlcz suq msFcus�z zporr�q pc Lccac�cq oc bcobsclA bcxrms4ct coupo�z' suq {,o�JoN,ruS �ooq ponzsKccbru�bLscFresz� y,is�uFsusucc o�z�sprlrssq zGs�?nS sccsz rvclnqc2 ursrvFsmtv� s zFsplc zm�scs cons� o{ �csncl' xcbsrzrua y,�siu�su�ucs suq gswonsl 3 � u�sFccrs�z zFsgruS iv zosq�nsaz ia r.cdnnsq• zcs DcFsrl 22F7-I �or.s �bresl zFsp�i�ssq 2Fsaiu�sres sn4 22Y-S {.oL s 2Fsprl�scq zFsS�ug sccs mpsv : , � a� -r_��,_—�� . n..�� „� .� .� c.�,n� <_�� � s ' Q12[fltfJCQ' . . � � :� £ �. . 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Eros�on and Sed�ment Contro� Escrow/Security Calculation for The City of Fort Collins Projec�: Cherry Street Cottages � Disturbed Acres: 1.10 _� BMP Amaunt Estimated lJnft Totak ERQSION CONTROL BMPs Units Quantity Price Price Silt Fence {SF} L.F. 1000 $1.50 $�,5Q0.00 Inlet Protection {IP) EA D Concrete Washout (CW} EA 1 $250.00 $250.OQ Vehicle Tracking Control (VTC) EA 1 $500.00 $500.00 Stackpife Management (SP) CY 300 $1.50 $450.00 Rock Sock (RS) EA 1 $200.00 $200.00 Mulching (MU) AC 1.10 $40Q.00 $440.00 Water Truck W Dust Controf EA 1.00 $75Q.00 $750.00 Surface Roughening AC 1.�0 $1 50.00 $1 fi5.00 Good �lousekeeping Practices LS 1.00 $2SQ.00 $250.00 ...etc..- $0.00 (add aIl other BMPs for the site in this list) Sub-Total: $4,505.00 1.5 x 5ub-TotaL• $6,757.50 AmoUnt of security.� $6,757.50 Reseeding Amount Total Acres x Price/acre: $3,593.7p Unit Price of Seeding per acre: $3,267.00 Sub-Total: $3,593.70 Unit price for permanent seeding; 0.075 ($/SF} i.5 x 5�b-Total: $5,390.55 Amount to Re seed• $5,390.55 Miniumum �scrow Amount Minimum escrory amount: $3,000.00 Finaf Escrow Amount Frosion Control Escrow: $6,757.50 Fields in yellow should be amended �or this project. '°Tlee amoient nf(he secevity n�ust he based nn oae and nne-haljiinres Bee esfrnxue of fl�e rosl ta i�istalf fhe approE�er(�nensures,or oi�e aeid or�e-lealf timeS fhe cosf to re- regel�te[!re distrrr6ed lat+d ta drj•lanrigrasses based rrpor�rrrrrf cost deterrniered byll�e Cin�'sAu�ural Reiege(alrwr arrd Sta6iliza[ioi�Bid,wlricl�ever rsgrealer.J���ro iitsta�ece, wil!Nre a�roorrnl afsecurily be less thar�one fhousmrd five lrundred dnllars(�1,500J fnr residetrlia!dcn�elop»��u or deree Ihausaird dollars(�3,ODO}for romn�ercirr! develnp+rte�et" ����ba'cidi06h HNhIf�R:paati'brerrsen:�ocuments:0ocurn�nts:Sorensen Engineer3ng&Constructlon:Projec[s:GiEmartin:Gilmarcin-Cherry:FINAL Sl18MfITAL-CF{ERRY;18-10-15_Final @ro,ion Escrow Secunty Calc_REV 3.�Is