Loading...
HomeMy WebLinkAboutTechnical Design Standards • • • Kimley -Horn • ❑ � ❑ and Associates, Inc. • Technical Design Summary — Drainage Analysis • • To: Mr. Josh Norton, P.E. • City of College Station • Engineering Department • From: Hillary VonAhsen, P.E., LEED AP, Kimley -Horn and Associates, Inc • Lance Oriti, P.E., Kimley -Horn and Associates, Inc • Date: September 1, 2010 • Subj. Drainage Analysis - Executive Summary Ai, Whataburger — Restaurant with Drive Thru City of College Station, Texas • Purpose and Project Location • • The proposed Whataburger (fast food restaurant with drive thru) is located near the northwest • corner of William Fitch Parkway and State Highway 6 in College Station, Texas. The subject property is located directly west from the existing McDonald's on the hard corner. The site is • Lot 4, Block 1 of the Spring Creek Commons development and is approximately 1.04 acres in • size. A copy of the current plat and site plan has been included in the attached Appendix A for reference. This proposed restaurant is planned to have an approximate 3,325 sf building, 34 • parking spaces, a drive thru, associated pavement and underground utilities, and landscaping • improvements. This Executive Summary is intended to address the drainage intent and basis • for the proposed storm sewer design associated with the existing storm sewer system serving the proposed site. • • Design Criteria • Being Lot 4 of the Spring Creek Commons Phase 4 & 5 master planned development, a • Drainage Analysis prepared by Ballard & Braughton Engineering was completed for the subject site. A copy of this report and the associated drainage area map is included in • Appendix B for reference. • • As stated in the report, Lot 4 is designed to have the storm sewer runoff drain to two main areas, which are both entirely part of the Lakeway Drive — Spring Creek Discharge system: • • • Overland flow: Approximately 0.42 acres in developed conditions is intended to flow via overland flow to the north into existing grate inlets. • Storm Sewer System: The remaining portion of Lot 4 is intended to drain to an • existing storm sewer stub located to the northwest corner of the property. • • • • • • • 1 • • • • • • • Conclusion • The proposed drainage patterns for the Whataburger restaurant are in general conformance • with the previously prepared and approved drainage study by Ballard & Braughton Engineering. The proposed Whataburger site has been graded and designed to drain approximately half the site to the existing storm inlets off -site to the north while the other half • drains to the existing storm sewer stub located by the northwest corner of the site. • Please see the proposed drainage area map located in Appendix C for reference. • • • • • • • • • • • • • • • • • • • • • 41 • • • • • • 2 • • • • • • • • • Appendix A Current Plat • Proposed Site Plan • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 3 • 1 I N I = y Y lip; q op O, o f hb O O N O V g -1p Nhpo g M � O O * oil,) K.N !} m "�, y u -7 ICON ^N,_2� ^ ^ryH1 ^b ^0, h $ Oi7 ^ 33*33 CO; rn ^ laJ ,µ R CO `° WWWWW3333a a a a v, O • l•j o+ W I Z 11 • J io(ohhh v � ol i .,� b 1 N !OIP N7�0 O pp 3 p 0, .7. W Q CC Z w .�)'."O. .. I'1 N N b to∎oto,0 M p v r) b NON ^ $ •µw NpOW 00' W O I N a.I W¢ W ti N it . r ,. ho woo 77417 ^;t. -NN, 777 ^h ^ O a ! "10^ W \ a 71,.7 ^7 V-.- ._ .- b'6ob ^tob7 . - .. b rn� N oYjpO ol[jdh 0, 4)OOi t!70 ya - - .=.3 cc 1 N 3 �jj �1 7C 0c0 „ 1n ^ a II ,n np,,V 7h ^^ ^h UUN 2 • • ° ^'1Mh 7h7 1 0 % N iu N oh I I N li1 '11 • Qo O 2 2X0 I•n4•0 N U II 41C3� 11 7 I O n II N 7trq. ips v- 3' A# 3.:e.s.AA Wn4pa.., 8eo..• "[ Z 41 0 4 000022 a Zh 7 U p y�Fa U @xffi ^1 Y ^ Q R O O ^Nh.}4)b 1 � W R7 s c.).F U %S1�'v, S n.h R ' 3Y"'- ' b O Uu0 t0 I ^ J 7 t, e? U b g y s. A t gai 4 ,o i 2 W 2 � W° ~ 0 2 'z AF S, 'z= '! A = ^z R ANAN v; � '^� O 41 O j O ° �Jy 9., r ' J � � O II Q O N N p Z 0 0 U K BAaA4 6RR- Rm�aRR U O 1 W J k� Q U 2 t CO 4 4 4 4% & H41ha2Zh�AR:hVAR252z,I V,11 EIXARR LL 3 0 d� H g Co 0 Co U mpo mac) 86 %' 'n•'"' '"""" W N J c1 W C a C CO ..- ° O ^ V O O J 4 • h N c) O CO 7 40j h .- fWWfkf Wh Wf WWV,t Ati Wfoff Mhffhhf WWf EN y rv n ° ' ,.RnR r. , .Ri.�nn w.n n .an�`_".�. •`s' N.d ni,rvn,P. pl s.',•9n Z � ;� -nhm3 ." M a h�'I"w ti 2_ i;._g ,_ 7 , 7;Z ', ; e Z =o. n h3hb p p O a ,te 9 § ~ y i y b_'. -b'Y`S ` §b` �` 6 L" p N 4) O,<N op bN0 nni4)O N w.A�T 1, a tX An i AAk ' = AR 411 . i==irS=b A i �mm ^ • / / /T�/ —7� ✓i , O �O N ,n tO V- ^ ;n ,O V. �'1 ,[] h.-�h O ^ ^.� // `o U I � N 4) N ° j % A °� i1, ._ II o, m in 0 n b b II ,� 4 $ c) T w o /N // U °� U °h 't U ° A 7 I O n ,n I o u $aHe: E °� ° 1 • Y W ° V r'1 I I U rn 4v1 b, o % m U I1v) b VVARHRHRHIC222I. 8� g ^ _AnR aHP " 2 e^ n e ^Uh e,oro ° o e?e) yHa S_R'd3 =R..: R^:nR` ^H „nR ^R_.R3R:R � v1 T ♦ W u vv 2 O �2 O H � 4 J2 p -47 O� q GPuQ _ W ki in r 4) ' g �� °m 0 0 0 o a iY.nnnl! §5 3 A?.9Heg2;Qty. oR” ^A *Hyg a &• U U U 2 2 � � N Q U U fwffMWW1.1.1 fI.AI - WWW3�W Wf W ,ntnt ffr-r• t BAFIPP.A:;:;;:gti-;;;NAMZ71-3P,INMis■pig. /� U ^) b 0, l � '�, ,` y a ) N ' W w OW NohW O �W p o' 3 R ^�H °- R "� 2Y8 „Y ' +♦ a. S 8b O b$. R; n_R "za R �_ ,0 2m i l , — a xNe> "7 ---s • .. ?e[% , � e 1 ♦ tlOb 0a y ae^ fee_ t ''�✓�� 721111 OM O ^ OI L o,„ 0). O, •l pih 1 N br,) Nm b O N7 ,ti yo. : 7 ` \ • I� 1fr, N N• b 7 7. 7 4)• 4) -:K., $ ^ 7 1 0 h 4) O II O O II O _ r I n ��� - o n h � o °° I �' u u 7 I u n I n x� 39 nn o : a" �,/ S �� • � I -co ~ ¢O�a UQjU UQ02 U Q,ZF1 nn.ne � Q � i _ , o��q o� Jy o � y CI JII le, Jz r blS =. P2 � 2 CO CI 0 ♦�� � �� ♦ v. o x w Ia Co Co $ eD ., : / 1#1°Pd j -§ - - 1 i t 'M'O'W ,OfI 1N3W3,1Vd 313d0NOO 2 ` ,, d oS )bM)Wdd Hal /& 'Q wb777 /M — �� q 1 , n € tttt i � WH �-- 32 0 \ (6600a M ,LZ S) 0.£ 71,101 ,16'008 M „L,£' y --�--- 6 S \\ // \ _J = t l - Y32/V I , ! >y'9L l ,11 .. ,EPOS! NOWWOO _ W I ., ,66'S>yZ ,ZO'0 ,L9'86 „� n " of - - 1 - -- -- h - - b - -" 1 Cm I I _ v ho' 1 1$ I I 'I f �n\ b i V �M 1 Wry ^ J J ^ W:. bo+ yp m = 1 W C� YW Y W �° n� a poac \ i wq U � h� S\ U O � • t UOV y= n N �p ^ � o o � N � a '-^ OJ $ 6i,,,, mQ nm . 3 •; a '. E. 1 _ � k U h n m N i �S o - ' ” i bm o 9,c :52 In m I h Ni' 4 i ? ■� OG Oep �'� ��� 8S 4i� 3� m I :J °) Wa ' °o� ' ti • h o i o S. :7, s pp�j I Y 7 v $ m 'N U N I 0 � � *-,53 O" Co O st z LE.: Utl H 8° 7 / low ^ m N o y N � 2=� I I � � ro l �o o N 2ry ?, I h ha / g n b W m 5: \ 1 H I O (-1,,,7,11.t31._ 811 OZl)_ I_1 - ,L _ / J J u 66L M ,B >.d[ 1, I 7m _ • a, , ZZ'* 9l !9 7 6!2 ” _ - �i J (9g 71,101 ,9!'00£ M .LZ,I.fb s) 1 1 $ _ sr - _ _ . I. --, \ LJ m , .` / L£1 S t g - - v - - � '.rozi JC= -�.. 1 l _, KIrl* M S_ 6,0£.l4 S' — eF > Y - -}' I � - c� • ,Z8'SZZ , +1 V. � ▪ � h /0' � .rr ri sa, � I T-- rn .erzis M,cr.rlrr s -I-I__ .t c. 1 .4= j...5 en 1 1 I .4 O J L }I- W I / / 01, 7 $ x J I, sn 1- r <n r- ' o I I g I 1 0 F t / s h -- / ,SR. r � _ z; k - We s � 1 � I � >^ y ° w n µ w� Sl / /�' \ / 'L I I J- -sr ^ ` s. , ° v' I I I N CO 3 .-1� 3 / / ` u W _L sr, J L _. —� U W m n 1 1 , 31 3 b 1 I- I - • U Ida 1 / a n ° u, 1 - -J O V I I I $ Z A C3 i — --r n 1 L N O V i 0 CO Q 3 N N O " I m N k ry ' p, W b II 4 Ln `� ti� �h ^- � a � W • ' �� o 2 O J^ ' n` 1 1 1 11 2� ffi rn �o • d m° I - °i I J O ~ ; ; c b L - -- 7 N z.1 a rL1 1 j ,£6'6ZZ ti <v 1 N S ^ ° 'k ' J Al „ 6Z , bl . l4 S - 8 : 2 Iy N 4.I J s r7l $ r - � - _ '_*4? z7 <, ° ^ , t � � _ ao — I W N ,° U Y W s °, 1 ■ Ot 1 M 03e( w 01, vao "1 1 1 Qq7 I c'i I .3 QCQ �, L. ° mo Wu I I Q_ I in 7 3 n h ^ � � I O • VI 7 � C N N — ” Oiry 0) I 1 Y Qom^ y �� Q Y 01 J - . 1 H ^ I,y 1 4.1 0 7 41 J m U O () 'al-- I--- I 1 I i h R W 3 j J Q 11 91, n ll - 7 - U �-% O :2.' 1. 0. O CO 7 sn J LI al .l, n• 1 W I . W 0 01 , ,¢-- 20 �° I � M tnJ r - n ) - - _ - I r'T s7 1 n ■t7 11- o • 7 1 I I Z O ,.r r1 Yl _7 b I M ^ ° . U 1 U L n I I ^ n O ° O - 0 0 9-I V J & II N ._ WR U ■ 11 1 «, z I 1 c2. W 'gI U 3 1 \0'" 3 _� I OV o: a �— I ° 1° ssJ -I Q z ti I "1 I. '61 b L ° , =n ' kn bi I F^ ("i Lu n 0 = o ' 1 I W I m w I ^ 7 \ 1 � ` , I I z Z — 1 2 m / m L._1_. ° ) 3 --Ig , S9'LZZ 1 1 / S S 1 I a W r ol, "M -- M .LS.L£.l' S I I I I O • 1 1 N �� in O v ^� a 3 1 ^ 99 J ' ti b Y W ■ U (., / 3r 8! -R. O V N� ■ b I Wy I �i n �� � . - I I 'n ( n I N p0 I w, Ni 1 \\ 1 � S 987 J L CI, J , 1 � m 217 n 1 � I \ I g Y . 699fr ,Z9"LZZ G 1 I \ ,l 'SL I - ,00'08 ,6S I u ✓ 1C - ,. z0 • I I `z z .62,61.16 N _ 1 a 1 71,10 C z 9 9 � 3 z fS , <f. e L£.[6 N 1 1 I RI �� m - •- - 1 71 ,09'006 3 ( ,C S009 3 , OS,tl.lt N) .- , - I T�j AO - 1 11 ■ I Q n a Li I i ___ - - '4r \ a ¢ 1 h \� £ _ F 'Hd S NO OO X33219 ON/dd5 a H O \ - W [ : 1,78 '21[ l 107 t.'"-,„ 0 J - - - - _ - - - ^"i , X33210 ON1ddS I ° '', ^ r' 1 'X78 Z 107 N ,-,1 n 2/31X30 H17V3H !1,X0!0321 Hd350P ZS o U m 1 7 X78 1 -216 107 I R • • 977 SON1070H X3359 ONINdS I ••••••••••••••••••••••••••••••••••••••••••• 1 `NOIl`d1S 3031100 ° I 1 t .1 bi r s AVMMVd I 81 IA 1 !ii H011d 'Q WtfITIIM V 9 HS fi _ ii : ) k y � ISVX31 bd Jll J 86 8 I fI� �1� `� a J i I H i U dd . Noudla3S3a :S O Si In LZO - E 6 1 N NIOl1 fl g • € I , 31.i i ll ka Aar. r. E 21 11 e r' I �Ci x • Lo o �� I '��� , ��� � z w o a d a V o g W O Mk �� 1� /� wo — UM F ° s$. 5�w� om o im g$ Z D X ,a . /1 = 1i Li Z a0 -„o0 °° 3owa i _ §g°roYY g 31 O a p Z o EL =V iiam �' o 1 w w o N a m Il c^ W : - - :t- / ,. m � .W w� Qgewx a��d oo >'a Z ¢ p , e7 °08 0 o z 0 ° o 4k lull or o J co W W G♦ J > m ' 3 h - tor_.i W Y fnNJI — i ,�, d S� �' $ �8m - 5z o� o s Q Fh . ° M 9 (� p } m � iJ 1 •�I ¢ w o w3oa S " o >mwm b. b b U W O ¢ I— ,I �� w°goo�i$m �m NW oo�o "g_�' HEltnl Y J W U O W W Z I tt 1° C a °Q ° o ° °e , 2 p o o ��sddf W ` Ip I � J U g�a8gw �a<$� g - ,9§8 n � ° ° . . n Y J O U Z � �t ,a z Q W owrc� ; z� = W� Si oUO�o S „ 3iiw ‘,2„,1,2 Q Q W m Q D Z W =Q W — o N oy �_< pa =° �w�=�N -0 o W o o w w W J r!; N ".� zaLL - ono -' ti ¢ ° a _ � az w 3N °p 1 w Q a wa L e F OLL ; 11:: : :TT;:!i!!: C 2$o t 9 � eQ¢Q `-' J 1 i aoo F °wd '# 01 R G Z —ow? i °o 'd 7m .' 4 � T J a a'a ^ w��- °z e ! a i 2 hiii '�' °Y 1 I - 1... -� �� woc°� m zWOO w3 o�ws'w`w° r�� F � I _ gm :11 W m m =a� x o �iy f ° y 'a w i c: oie��` 01 %I U W W � rcr wopwm` " 000 w'aoo Yr m mm or-a m o_�.5a 3 °�a�m°o�� °°mom �4° o ¢ I U _� (� i m P4 1 1 10 1 1 1 1 K 5 ._ I § i i g . lS1 � - 7 ( - i . O ° a m o Q w `- p u > ^ d S Z y � U s m m w r�. � Q ° d 111117 Z Wi - J� m J o i gnN�� a a� m „ � a � gn N O a$'mN e' \,/ 'a _ ► 4 ¢ I U iie 4 W b W e S w a 3 rc z 4k' a v g - ,..,1c:,:---N e ' i 1 __, /� i I J o W$ 'd `>:- 9 p m i k x w oo° a8 o s ¢ as w � , 8= 4 ' ° •I Q qhi O m��oa — a ,,. J z g t `a < Mil; a x m Z"! °~ u< 1 8 a - i s _ U ' 3 w m o z o o ; �O - - -► 4 O " S i LL w W �' m5a o ~ LL o W "�zyii m m s ° ° O z'" a .3io'`L w a ° w° o 0 0 o o f Uo LL H8 O - uw~w� �� >- w 8 w w w a ° �w W I I I w � o �� Z 1 I I - €_ a S J 1 ii a I I I W - ,a t 1 - I I I I _ I I I ow _wg °z'�a w H ° � 6 - I Z N �, w o o 4 apoi o� o w m a = _ gill m o- y >; ° Ne w � a w> m a _ H 'oo axNrc wd g m LU Z CO a U gg - 1 ( - ,1 >s 5 �x ° x . i ,-z a s w w w w >- O W o 6 O oacl g o m , 4 =6 ° N ; * i ..; 6 1 m r � 8w J A Cr 0 e a �_ p wN�o !i! o Y F I- Z m R$ Z -a� N Z 8> q wrc� oa m wz „w m — 1 ti z 6 W tz w i CO 6 §. log go o ; N W y3 : o3 'x . c, a O '8i �Z U N 2 W 'm m a ° a�LLU o off x`a �iwi � o a zo - zLL ° w 1 $ ia w W m J � gw y. � oc �� � Jm ig ,� 1 N z �g�� �n W 3 3 a m w p _ I—m —I �= w f 41i,1 8 0 2,,¢8, pa >o. z g wH,W', m> ua § 3�2 0° _ m o�z`a Ai! ¢ W ! F a ? a Hiw a z y" . . ° ,. m _ ., LL auz w a i f wg 6�� ° m� • i 5 • L aW ° O 'O I ° 4 R �, o �arrz a fc , , - : Z8 ;� �y ....� ' ZZ M LZ l L,E4 S V ... -- ,'.. - t' v1.. , m- <. - ', , t ‘ 8 a F ;q i I .i a � ' � , .� d l - n± •. " :.....' a�� a 1 SF 1 L1 � ir _ r . '- 7 000zaI :I � T" t i Q w II '41,;$ .°° N ,1 53 dS fl 1 'V ( * _ Q 1 I CC FL , FI- F = m - L L FL r 11 ;v-- � � N. ' r s 1 I 1 , , •r x O ��jylgy • • f N ( 0 i _., p i 6 I. i N sy 4F j '• V \ .+, ' q ` Al f ly f 1 • f� >> Zi+ r i ire i n� °o'a . •°° 9 > _ � . t I �� �l m a t i E , E1 ,,r,',- . Ip I R I, r c,,,, IN R ;F 1 ':: — ®�! \� `; I 1 1 ` , ^ = a ° ° i a �G' ul .iI b/ 1 s ° 1 0 1 1� -' 1 i p zree t ao'I. I 8 1 1 I � k t .I Y ' p g y i ° � • m w I. t y a ` s ■ .9i:;i c ,. + t n ' W X 8 3 1 y. �1 7 I a; I ` - H o wl:nm -: `• ro .� _ } i 5 s�"° ° X i a t ! -�b. � o > i � b � � °, ,; S 1 1 z — a e , ,u. y i _�_ „art .r, i.;..yr — -- -e —_ 1 * w� t s a 1 ` - ', = t ' v a 'R "a ° n ; ^ SC I LZZ'4ZZ 3 ..6Z.171.0 64 N 8 I f ,e t , *. ! ,.i N . n c I L6'`t, 3NI1 101 O3SOdOLld , l 1 " 2 u _ '1 n ° m t 7 '' I 1 L z `'1- ( r p � q p- ,,. .. ...�..»m / — I $It U L 1 1 t 'JU ^ - -� 1 Z ` 0 " ( .: i Nlt z . LI O" r i � ` I / .E6'4ZZ 3.6Z.4Lol4 N t I 1 , Q 'Z 1 / 3NI11O10NIlSIX3 c L L[ d f S" I I ' Qm 1.. 8,i 1 * I fi WO °° cl- & 1 wantmuut N Oanvsls, Wma.1..3IL ennoma.M ...MS 1rm01 wamzm,cnuxaxm nwo MOM.. •••••••••••• •••••••• ••••••••••••••••••••••• I A SVX31'N011`d1S 3031100 ' ► q = i 11 w J�yM>I�Ibd i ° a t ] J i.t . fl R , H011d '4 INV1111M V 9 HS ; „ �� j Pd 3dAl JNI( ine I ` ° I 4 d OM ¢ rauala�a LZO £L win • 8 t o � 111:11 X Rib hob 3 ..) g co �� o r� J g m o q Y =o. z § h ° i2 i,1 °1_ 4 11SEY u ^ �w � 3 °; No s y ° N= mw J �.a z" cn �_� a �= a s : poop w $ ff g � N z z o d Q �� �R � �9 Q g'm i 1 ° � io I; � # 9 _ '3a s ��� �' °o N o w e n "K �F_ .. Z d o w � a °� �� � � �� � sh d _ RR �" w s � 1 o f � r' :,. < - � o 6 g ' , , = 2, 0, $°$d6 S=wm° §Nw Q g '' i i g `i- a ; . � N ; z Q ow 5 a ;� i ms wo ,i ° o° ' °22 of u a w it 2! 4 °w a pki F 7 ,2 _ . °i ° rczum 6 O „8 = ° o ° � °' my .� °�ew r N .. ° $w o s < O�¢ O � ' n u ,, ua :0 i h > 0 J "�o o " a „LLa ~a i tz °w wm - w i � 1 Q w N . za w /A > ��`1 � � a > s ” o < o o ° �/� z ! I.� - rc hyrcrc u i m ,� 3 -,, n § 3i 1 g g Sy I - h = a N LT, Lu Pin �� z o : $ o , = LL p '§ %—g i < s` `a H rc rc � ° LL i i 0_ cC m 2 ' a a WUOLL mz °° �A! I J �io,�i u�3 ° r ° ° =yawe °z . � y�,°{y�j�} —%Z ! 4 11 I.0ir iworw° w ° om a °wi =LL :!,5,0woi:oa iilli lli r e e m (n W CO i o =� �° ° $o wa° �w w i < m D _ it �o0< m °rco°m,v,a33o�8°., o ! Nogosi'd ° 5o , F @ _ (1) r W g Q ii�i c. 4 4 .9 - ,Z E 8 > 4E ;$sfix i -J t1 W 1 . -, ,g s g v. ,t1' W c o i •t a x die a (, ' F- i W w I \ / N .. O °_ _ 'L w �� ~a � jI I LL FOC a il° " _ ° w Z =' aDw Ow a � _� s>O�° . s e. n z y o ° y tea pW I^ a a 8 A sA u Z y 8 I cc • z w . � fA � "—I' I O > i w w a z J , 'c Z x o p w h w w w j ' I Q 3= a 4`'t. a iv.A8 z z < - z O o �� 'n-c:2- � � s wp 11- 1 C O 3 Z w 8 o Di a w p w w � 3 J 11 € 4 'r ' Q CC w S1. -.0 M N w m ° o o. 2 w J E 11 W x x 3 - . w 2 I Jo IN ► = W w o $mg fr f] K z W W z J z Y �, ° �u Q z _ z O w w o w > m m i� ; w ` 1� 3 ;• 1".'i ____. ..__.._. _ 2 o w x w a rn N m z m _ .q LL Ii '_ = a ? w o a w° a g a u o( \ W ° z i ' "' = i> — - W i g- p or w m y m o 3 O O O F z z z .. F . � y y a a z w o �a w o 0 0 �� • w a W H F ` y a L LL co O o )- a M m m w¢ x U N O U �' v , ,' m W ®000®0®0000000® 00000 � 01. � __ �� y - ift - m H � Zw w wy a N ° .; ,z E .9 ' t a s ° w a 5 n W -1- 1 - .....__ +_ W ` o A J ..LL a m N Q w H a " H 70 { u 0: p O 22 0: w o h Y a a Q O O Z y w y • i i W m N rn w a 3 � rn ¢ O O O o Uw w ¢ a to 1 0' m Z O o �( _, w x O ti z a w z m z m F x 0: 3 a o �... N J , Q Q Z F f' O 5. w = K i x F Y N U W ❑ O z U � c? ° p a U a z m 5 e-x v a� o x rdd o o� o � Q w JQ w p r g- m rn w v 3 [2 i"' m m r 8 o w m `,,I,) 30 w w 0 . � W'� �'6 ^� SE W w w ,nom , c 1- < ~ O i w o v , n i p 2 " w U m "' w a p F 1w- D! '.. �.. > E � �, e, w w w ¢= z a1- x x ❑ � z a o a w ¢ ✓? 4 L,!,- ES 3� Ns m p a ir 1 a rc E z= 1 =a , 2z K .`,; y o w m ow a L ae, u co �a ° ig it .b :Orammo.r&4:. ...r 1 Is m i 0 r_i w z x a a 2T ❑a a s U o a . p U pz u zm p� p z m t o marc p v o" .1N a o � tt a a s 2) 2))F B u . p w x T o g p o m 999(5 5.7 o, �� `._. . a m� o U ma a x <m x xm p w x U s m 99 (5 om v cg, Q w IC 22. 00 ® 0000 00 © 00 00000®0® 00 ® ®O : �� �• .. , � 8 �R a m �Iq � D 3 w - rc 1.!,411; I � � � .ZB SZZ M dZ,G 1.094 S C -.i 5 ' n I ,tea•' . � ZO'lB f F m 1,I 09 0© __ e I 1 ® , ,. - -i . , r _ 4 � I ��' d © 0 0 i' I I S I` 0 = Alkali 8 0 �/ h � \ 1 q � 1. 0 Yd � t I t � LL GIP 1, ../� W i W ° �a © ® a I e I ' U W m L! { b ,mss, �, � .00'OZN ,. r.` � 1 � Q , Q ��� o ', - .es re ijr I Q W FL I , 1 F L FL L � , $ 1 a,. -12 ' !!! Q �t 4� 8 / x ' o O © v g „ 0 1 , . � , , l N 0 N . I .,. ....aft �� ® .00 0 00'9 01 0 6i, lR x . 1 , N < , `} 04 r .. .. — _ - 1'l•J . I I ' .t _ I't � el• O e 0 ® 1 �.�, O W I �; .. -R. W " : W ( * , J . 5 rn I•[ffil i 111711111E' ti .trn. Wit. 'y0`�� xi, 0 _ VI ® a ° * Z p a # a y l t, ,,I..1 � • — ,00• Z iF ,,, 7 1 _ c 8 , z= a Nil rt5 `s I1 © ! ■ � _ t °` 1 ! ,, 0 a $ t2 ' .4 = a g � 9, I _ u l - G i t — -- l ^J I I '' ( � t , Z_ o f n a ,.::: m$1 a I,`s,4: o 7 I z Z a a . V Q . v'' ':- r, '' ' ° pm '4 i l'" '1 all G E „, I � _, ° ' l * :cfs h w d 01 w o "°y I U . f9'6t . � z� E hE . O ` 0 �� ^ � p S ,N( u § ern $ N: I ■W ( I U 7( .1 '' t I c 5 _i_,,! r9-2* ° r, e { e • ; ��IIr 1�1��i1•I�� •� .. •ro . ! h 1 V J Z 6 o m i o - ° E 1 _ 1 _ X2.5)1 - J 3 a — -- w Ail m j! 44,46 . .f. . , n° ,CV N ZZ 9ZZ 3 ..6Z.bl, lb N r vi y o 1 ® `J i O 3NI110� 03SOd021`d, 8 8 ® © � _ y .. " z C N L �h , I - F w D L < 1 x o I 000z 1 osf9 ^ 11..1 cvw 1 11 �I ' _ - -� ® 1 I II i a1 i. 6�a b w { '4ZZ 3 /' , ,E6 .6Z.blel4 N - , W i i w m �� � w a t 2 1 o / 3NIl Ol `JNIlSIX3 l E e i Ji I F i `3 ° g o 'o o° LL w o I ' g w° I '8. o f � 1 s Z god I I 1 ! L t Um Z _ Iii �! �� �i l o w l [ oma W.maws,msommnwaz + w mo . wmw w,an�x s»m wuo Ae •mi „xx m.•v.i:,nx n,n.d. +,^ ..,..... z. aanx ,aiuz • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Appendix B Drainage Analysis completed by Ballard & Braughton Engineering • Existing Drainage Area Map and Calculations • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 4 • • • • DRAINAGE REPORT CITY OF COLLEGE STATION • LOWE'S HOME IMPROVEMENT WAREHOUSE PAGE 2 • • Lowe's Drainage Analysis • • • it 14) 6 le • PROPOSED LOCATION o i t ID • c Id • D LAXEWAYDR Law • HIGHWAY 6 .. — mom • t' - .j-%, 5,. • / 9 9 . )41. 4 • .i , W fiF i • • •PA. 2 ! ItA 4 . • • VICINITY MAP • N.T.S. • • INTRODUCTION • The purpose of this report is to provide drainage information that demonstrates that the proposed drainage infrastructure for the Lowe's Home Improvement Warehouse at the • Spring Creek Commons development is in compliance with the City of Bryan / College • Station Unified Stormwater Design Guidelines (USDG). The Lowe's development is a portion of the current Corinth tract of the Spring Creek Commons Phase 4 & 5 Final Plat • (Refer to Exhibit 5). The Lowe's tract is Lot 10, Block 1. The remaining tracts in the plat • will be referenced in this analysis and will be retained by Corinth. • This drainage report provides analysis for the infrastructure required to facilitate removal 1 • of on -site flow and off -site flows. Existing off -site drainage enters the site in the • southwest corner though an existing box culvert from Texas Department of Transportation (TxDOT) right -of -way and through an outfall from the existing • McDonalds/Exxon development located to the south of the site. Two proposed storm • sewer systems will be constructed with the Lowe's development. Each are referenced in • drainage reports prepared by Mitchell & Morgan , L.L.P and called Lakeway Drive • • • • • • • DRAINAGE REPORT CITY OF COLLEGE STATION • LOWE'S HOME IMPROVEMENT WAREHOUSE PAGE 3 • Drainage Analysis and Addendum to Lakeway Drive Drainage Analysis submitted in • February 2009 and April 2009 (respectively). The first system storm flows are from the • associated Lowe's development and discharge, undetained, into the Lakeway Drive - • Spring Creek system. The second system storm flows are from off -site runoff mentioned above and discharge to the Lakeway Drive - Woodland Hills Parkway system through a • box culvert. • • LOCATION & DESCRIPTION • Lowe's Home Improvement Warehouse will be located in College Station, Texas at the northeast corner of William D. Fitch Parkway and State Highway 6. The site is currently • undeveloped with grassland vegetation throughout and is west of Woodland Hills • Subdivision. The proposed development will construct a Lowe's retail facility with associated driveway, parking areas, utilities and two proposed storm sewer systems. The • site will be mass graded but only the Lowe's parcel and associated shared drives, utilities • and drainage structures will be constructed at this time. The site slopes generally from • the southwest to the northeast through existing swales and drains to an existing detention pond associated with the Woodland Hills Parkway System located to the northeast of the • site. The first storm sewer system contributing flows are from a portion of Lot 10 as well • as Lots 4, 5, 7, and 8 entirely. The runoff from these tracts will be conveyed through Lot 10 and discharge (outfall A) undetained into the Lakeway Drive storm system. The • Lakeway Drive system ultimately discharges into Spring Creek. The second storm system • contributing flows are from a portion of Lot 10 as well as Lots 1, 2, 3, existing TxDot • flows and pre - developed runoff from the existing McDonalds/Exxon. The runoff from these tracts will be conveyed through Lot 10 and discharge (outfall C) into a box culvert • crossing Lakeway Drive that discharges into Woodland Hills Parkway. • • DESIGN CRITERIA All drainage design is in accordance with the City of Bryan/ College Station USDG. • The Rational Method was used to design storm sewer pipe with the 10 -year storm event • with a check on the 100 -year storm event overflow routes. Hydraflow Storm Sewers by Intellisolve was used to design the storm sewer systems. Hydraflow computes peak • flows using the Rational Method. The time of concentration is the time required for • water to flow from the most remote point of the drainage area to the point of the system in question. Hydraflow computes the time of concentration by choosing the greatest of the following: 1) The time of concentration of the upstream line plus the time of flow • through the line from the upstream run. 2) The time of concentration as item 1 for any • other connecting lines to the system. 3) The inlet time of the line under consideration. For the most upstream run, the time of concentration is the inlet time. For all succeeding • lines, the time of concentration is computed as the largest value of the three items above. • Thus, the individual discharge flows calculated for the individual areas will not match the total discharge flow at the outfalls once the time of concentration and flow in the pipes are taken into consideration. • • It has been documented in the Lakeway Drive Drainage Analysis that no detention is • required for the Lowe's development based in the O'Brien Engineering Spring Creek • • • • • • DRAINAGE REPORT CITY OF COLLEGE STATION • LOWE'S HOME IMPROVEMENT WAREHOUSE PAGE 4 • Commons Preliminary Drainage Concept report dated September 2, 2005 accepted by • the City of College Station. A supplemental timing analysis by Mitchell & Morgan • entitled, St. Joseph Regional Health Center — College Station Campus & Remainder of • Spring Creek Commons Subdivision — Timing Analysis was submitted September 8, 2008 to the City of College Station for review. The timing analysis further reinforces the • O'Brien report in that the timing of the peak discharge of the main channel will not be • affected by undetained runoff generated by this development. • • DRAINAGE BASIN • The proposed project site is located within the Spring Creek Drainage Basin. No portion of the Corinth property lies within the regulatory 100 -year floodplain per the Federal • Emergency Management Agency (FEMA) Flood Insurance Rate Map (FIRM) panel • 48041CO205D , with an effective date of February 9, 2000 (Refer to Exhibit 1). • On -site drainage areas were defined within the site boundary for the purpose of designing • the proposed storm sewer system. Off -site sub - basins were analyzed to ensure adequate • sizing of proposed infrastructure and eliminate the concern of flooding. See Exhibit 2 for • on -site drainage areas. All drainage areas will drain through Lot 10 into either the Lakeway Drive - Spring Creek system or the Lakeway Drive - Woodland Hills system. • • • RUN -OFF ANALYSIS The proposed Lowe's development and adjacent Corinth outlots drainage have been • divided into thirty-three separate areas so the proposed storm sewer may be appropriately • sized. Drainage area 34 is the off-site water received from the McDonald's/Exxon site. • The discharge flow from this area is conservative and does not factor in the existing detention facility. Off -site drainage areas 1 and 2 are from TxDot flows. All drainage • areas will be routed to one of the two outfalls in the Lakeway Drive system. Each of these systems will be discussed below. • Runoff from drainage area 2 discharges into the curb inlet in Lakeway Drive. Drainage areas 1, 6, and 19 discharge into the curb inlet in St. Joseph's access road which is • referenced in the Lakeway Drive Drainage Analysis. • Lakeway Drive — Spring Creek Discharge • The portion of the proposed Lowe's storm sewer system that discharges into Spring • Creek via the Lakeway Drive system has been designed to accommodate the post - developed runoff for Drainage Areas 3, 4, 7- 13,and 20 -29. Those drainage areas include • portions of Lot 10 and all of lots 4, 5, 7, and 8. This potion for Lot 10 includes • approximately 10 of the 13 acres. • The storm sewer for this portion of the Lowe's development includes; combination curb • inlets, grate inlets, and storm pipe ranging in size from 15 -54 inches. Refer to Exhibit 3 • for the calculations in sizing inlets and piping. Hydraulic grade lines (HGL's) were • calculated for the storm sewer system for the 100 -year storm (Refer to Exhibit 5). As a • • • • • • DRAINAGE REPORT CITY OF COLLEGE STATION • LOWE'S HOME IMPROVEMENT WAREHOUSE PAGE 5 starting condition for these calculations, the tail water elevation used for the 100 -year • storm event was 267.70 feet at the CB5 inlet. This is based upon the Addendum to • Lakeway Drive Drainage Analysis by Mitchell & Morgan, L.L.P. submitted April 2009 to . the City of College Station. The hydraulic grade line was designed to rise no more than one half foot out of any inlet throughout the development. Inlet capacity calculations • were performed for the 25 and 100 -year storm events to size proposed combination and • area inlets. • The post - developed 100 -year discharge at the end of the proposed 54" pipe which • connects to the CB5 inlet is 122.24 cfs with another 17.01 cfs of surface flow from drainage areas 1, 6 and 19 which is added to the CB5 inlet. Thus the total 100 -year discharge from the Corinth Property is 139.25 cfs to the Lakeway Drive — Spring Creek • system. • • The post - developed 25 -year discharge at the end of the proposed 54" pipe which connects to the CB5 inlet is 103.38 cfs with another 14.41 cfs of surface flow from • drainage areas 1, 6 and 19 which is added to the CB5 inlet. Thus the total 25 -year • discharge from the Corinth Property is 117.79 cfs to the Lakeway Drive — Spring Creek • system. • Lakeway Drive - W000dland Hills Parkway Discharge The portion of the proposed Lowe's storm sewer system that discharges into Woodland Hills Parkway via a culvert system that crosses Lakeway Drive has been designed to • accommodate the post- developed runoff for Drainage Areas 5, 14 -18, and 30 -34. Those • drainage areas include portions of Lot 10 and all of lots 1, 2, and 3. Off -site drainage • from TxDOT and pre- developed flows from the McDonalds/Exxon is also conveyed through the Lowe's development via the Lakeway Drive - Woodland Hills Parkway • system. The combination of two 18" RCP and one 8'x4' RCB from TxDOT right -of -way • discharges approximately 125 cfs in the 100 -year storm event currently onto the property. The history of the TxDOT drainage design and method for which these flows have been • determined can be found in the Lakeway Drive Drainage Analysis by Mitchell and • Morgan, L.L.P. submitted April 2009 to the City of College Station. • The storm sewer for this portion of the Lowe's development includes; combination curb • inlets, grate inlets, 15, 48, and 54 inch storm pipe, and 4'x3' RCB. Refer to Exhibit 3 for • the inlet and pipe sizing calculations. Hydraulic grade lines (HGL's) were calculated for • the storm sewer system for the 100 -year storm (Refer to Exhibit 5). As a starting condition for these calculations, the tail water elevation used for the 100 -year storm event • was 266.87 feet at J -2, 72" junction box. This is based upon the Addendum to Lakeway • Drive Drainage Analysis by Mitchell & Morgan, L.L.P. submitted April 2009 to the City of College Station. The hydraulic grade line was designed to rise no more than one half • foot below any inlet connected to public RCB. Inlet capacity calculations were • performed for the 25 and 100 -year storm events to size proposed combination and area • inlet. • • t • • • • DRAINAGE REPORT CITY OF COLLEGE STATION • LOWE'S HOME IMPROVEMENT WAREHOUSE PAGE 6 The post- developed 100 -year discharge at the end of the proposed 54" pipe which • connects to the J2 junction box is 135.6 cfs with another 3.07 cfs of surface flow from • drainage areas 2 which is added to the Lakeway Drive curb inlet. Thus the total 100 -year • discharge from the Corinth Property is 138.67 cfs to the Lakeway Drive — Woodland Hills Parkway system. • The post- developed 25 -year discharge at the end of the proposed 54" pipe which connects to the J2 junction box is 114.62 cfs with another 2.60 cfs of surface flow from • drainage areas 2 which is added to the Lakeway Drive curb inlet. Thus the total 25 -year • discharge from the Corinth Property is 117.22 cfs to the Lakeway Drive — Woodland • Hills Parkway system. CONCLUSION The development of Lowe's will cause a small increase in peak storm water runoff due to • the addition of impervious cover from the construction of the building and associated pavement for parking areas and drive aisles as shown in the chart below. • • SUMMARY POST - DEVELOPED RUNOFF • • LAKEWAY — SPRING CREEK (Q) 25 (Q) 100 • Surface post - developed from • Drainage Area 1, 6 & 19 14.41 17.01 • Subsurface post - developed from 103.38 122.24 54" pipe to CB5 inlet • Total Post - developed flow from 117.79 139.25 • Corinth Propert • • LAKEWAY — WOODLAND HILLS (Q) 25 (Q) 100 • Surface post - developed from 2.60 3.07 Drainage Area 2 • Subsurface post - developed from 114.62 135.60 • 54" pipe to J2 junction box Total Post - developed flow from 'S Corinth Property 117.22 138.67 i However, due to the proximity to the primary system and previous accepted drainage • reports for this development, the site will be not be detained. The analysis of the • proposed storm drainage improvements illustrates that no significant flooding will occur as a result of the construction of this development. Review of the storm water analysis indicates that the drainage design presented in this report will provide ample conveyance • to meet the drainage objective of the City of Bryan / College Station USDG. • • • • • Gp • J.q • uo►i • S • 1 • ® t1 SPI. 8 .Kl • Ae a�oaHO • cacao '081031'08d. • • (/)11 9 . •ereae�ers MINIM wt / tllalt i•i4.1ddY/lsaoee & [¢ �apa6oj Su awo In • t :itU (EW 0 .4 r 0u��8 1 e 1 1 1 1 dtfW ` alV 30VNINMICI a 1 la I V • r 112 I l ii ii i P I tlits Ii W wq11�Eti S a a o " � w Z Q�i� w o �- =gy wo j! a QA z w o z N o v 2 01 i �I 1 i 1 l l i `� S \ 1 U a r 112 {� t • 11 iliiiii Y No- _ o _ AIL /„,„,,,„ 7 , .roan 7�,r,+ �,,, -- _ �— r -__ - -- or i 1 r r <s� \ \ \ 1 _ AV H011d .2_WV1111M% - - -� - �� o t J - r . .1111 ` \ — _ _ - _ - _ 7� N � == Rrr__ — ' - - - \ '-" \ -___ - -, \ - - _ - - • - � ___\,_ _ i....____. - —� y i -i - ----„--3.______ o �- T= � - r _ ='y 1 sr-� /e b t / ..i ice,- - " ■ J -.I- � � _ - -�_ -4 _ - - - _ -� moo,, , m t e ; �� i � ' --"1.----- -% -- � g. 1 111. \_ ( ` _ ' � -- { -� - -'1 : - _ -\ - - -1 i I - -- '�ti r \ 1 „f_ __,______---------L_---L4_.,__ / :: !oT : : — — J� I ( I I F � VI \ °� 111 II i \ \ .. \ I � \ _.. 1 � ! � -� n 5 I II �' \�\� I (r II/� �11 III , •I, I ---1-71,-fl. � � Orin WU «� — \. I II , I \ �- \ � '111 �'hlll�l �' 1�'�II - �' ®9M. 29s - - - - I _ , 1 \�� (1 �1 I �” I 'Iii 111 1 ' 1 1 V 1 � \ L. • \ \ ` — 4 . - - : . { `N 1 / \ r ---1 \ I 1 1 � I a /111 11111' / �11 1 1� E 1 v y� — _ ' — ,--',/ h i y� �; • �� \ i i' �� � � I I • \ — N p/ � J s I o 1 1 ) \ 1— J \ 2 ; - -- -- — .4-..q..; // / 111 �� \ \4_ ----1 _ 4 , I / • // I \ 1 1 --/-' 1 P . e. ' V 30 9 e - :- me _ _ , ,, , i 7� p . ill , � ' 1 � 6' J � \ � I � i f \ � � i � 1 1 n I 1 I \'� is \ \ ` I N I " t"`' r t • 1 � � ' _ — c w 1 ' � , l , r \; \ =\ - AAA d o � � - � ,Vt 1, I — '•_ _ 7 � i � , 11 6 1 1 1 \\\ ! E a — _ \ —I Y /tI j , ,,a �I ),I \ 1 1 1 1 11 I II I - 1 1 11 , IITI I \�\ a \ 1 11 — ®�� --- - - ;I ;, / \ '¢,\ v ■ ��� / � i i I JI I ' 1 1 I I r \ \ - • ` •.' - v� CIE 1 / ' //i -- V ' �1 III I / V 1 i 1 �. r Q�� _ ---- t II�1 ' I . � O ° ® ° :1-ut '-- — ,/ e' /vII � / mi l ; r ' , VI I I ( t i l l t / 1 _ ,i nI /� I I 1 V11 1 1/1 1 V � V 1 - __ -- A k. . � � k = 1 ;-1 /77/ I 1 I ill I / 1 III ., I II rl i l l I � ; , A —I ' i � 7 / A \- — = ' I : / � 7' 1 III; / I 1 1 .t I 1 11 , 1 1 Ii I il —s ��I 1 ` �� ' -� = I 1 1 I� • I it I I I 1 � l� - � 1I, -, j k \ i r- IL \ - - r III 4. � 1 1 1 i j ' %ril < . 1 t \: ' ; I II � 11 I I I I 1 9% � � � �. v- �\1 - _ ' ' 1 / \ _\ \ I ' Jr-- I I I 1 I � I l il t�� l l ` — I. , � � ■ ry \/ 0), { \ , : :o � e i \ L � -- I 1 1 I 1 I ' I ,., 1 1 I �1 .1 - \ ® ®B ` _ \ \ t! 1\ , ■ 1 7 ._. ' I` 1 _ 1 . � \ l ' ,' / u t ,r - f - \ V I \ I 1 ,� 1 '.�\ I J\ ill 1111`rf _ � _4 % \ co y I I -. I /1I I � . I n 1 v 1 / ` .. \ Q \/^ , \ \\ \ I � R' \ 'B / / I 6 ♦ \ \ 11 \1 N 1 1 1 i 1 \ 1 "iI,I (/( R F. 1 \ A , _ - V� \ 1 fi I . i -" I )1 i' IiI// 11 1 -. \ ,, 1 ) ,.. I 1 I r 1 \ .F . / 1 -,0/ ' " \ / \ \ ',. ' ° c - .. s ��® I \I I, IYI \ 1 , 1\ !I ! \, r 4. 1 / \ _ ,_ / / \ \ . 'I 1 — �, , (l l�l \ - f I = — ,\ \\ ®8® , \ \= \1 -1, Ili II /, /II 1 \I �� I A \ \ r zr a � \ \. \ \ \ \ 1 1 ° ( I I 11"'ll i\a ,„, c 4, 1 Q _ - - / , �' � ; . ���`_r:. . ,1, 1 , l 1 �. \ • __ _ _ � 1 � 1. .,.c 1 11 IINI INI; I I` 6 r� -- \� \��� �_,; a \ g = I ' III ' :-1_ it / / / 7 ,, � r,- ' ' .erf._ _ '[ i Illl\ 1 � '� / ° - -, r. - ► — e - � ,,. \5/ - , � - \ _ - LP L — T _ — h - \ '_ ; , , 1 11 IIii�ti — /�: / / © ° � . . / j -j p d � ,. \ 1 \ I (I III I I �1 1' 1 1 1 / — r II' z / \ \ 1 \ \ \,e 11 I I `1' a/ / 1W . 1 �� � • I / � / r ,... i ! • ! ., p ' E \ yi g \ \ • \ I � 1 � -- , I r '. \ a �\ _. — f / �/ / ( I ••1 i 1 �� ` _ _ T m”., \ ,.. \ y 1 I I L J ,y y �. I � I a mo_ I ; V H ! _ 1 -- - ) -; 1 W ' . 1 1 , 1 " �i , � 'N- L- r�! /� I 1 1 ' • 1. � , � � \ A ^ I � � \\ \ 1 � ',111 I / 11 1 � 11 _ _ N \ / / � I , i , . maw L - E9® / _:14.,,.4..L: I 1 \1 t •\ \ ' I : ©®V 1 1 1 1 , \ t II 1/ � ' /1 , 151_ _ . , �,� v I y 1V1 11 V VAIV I y l l ` Iii II 1 ` ` r; I I I 1 \ •"•/- ? , NIV V \ : N 11 i j: ✓ s 1 LL e�® 1 1 ': U I � ?x :, . . ' T I �II I I 1 III)I I \ L I �. { j ' i // II j ; v l ,'I,:. X1 ' A v \ � 1 1 � 1, �� I \ � I iill h ,. A e I . = � j /r ip- ` t - � ri T :. I I � . ,. \ _ ____7- \ _ __ �� _� i �.. \ \ . / •\ �' \ � \I � II �� \\ i y L ^I - _ z — / \ 1'' � �/ I il // c _, - ,,...7.7 � - -- , -, ti r � -ma - r amie � j l I il \ l_ " i 11 _ _ • �� L� t a s ` �.___ -- \ . e . \\ -� H 3SOf' ABOV021 V ` \� \\ / / 6 \1 1 �,'' /5 V\ I I ,. -J _ �, V �, \ \ , \ - \1 `� 'ma -,Ji / r � \-1_1- 1 1 1 \ I I �I 1• '/;/... f a I- n _y D - / -i / n , 1 _ - -1 _ � -� I - /I m l , \\ \ \ ' 1 \\ ' ,.\ \\ cY I �. �1\ 11 '1 v. � V U LJ J U L - \ J- -- a � 1 I\�` m \ / .3v $ ry b' 11 I I I �. 1 � c ) D CL co Z 0 Y \ \ V " _ n A- I II � :!_� 7 / I'r �, U U J � 1 L 1 ' • � - 71 l J U ■ •••41 41 41 •••41 41 41 ••4/ •••ISII41 41 41 41 41 !•41 •41 41 41 41 •0 41 41 41 41 41 4 . I ■ • • • • • :we a3o 1.00 :°N ioaroad • • a� - Y uav ill .i. a., nn °d •a• 1 •• • • A ra i , —.• 1 — ••.rsr...........waat . n • nrmorr 1 i 0�3 a °. NOILVIS 3031100 s N • � t 1 g ,� 3 N o1HJn�la ® � 2 a I i ij t sa a a 0000 o $ 9 .. 1 SNOIlt/lfl�l`d0 3JdNl`daa • ° • • 22:888888 22888 RB2 8 1 14;11;;;;; LO 7q- 888862828 8288 °A 8� i 8 8 :886RRRRggB 8- yJ 1VERA { 888 4 s e 44i38RI4l�dRd4A &? 4� 2 4g' »4RA ; ;; ;411110 1 rh 11P gle iiiiiiiiiiiiiiiiall seR �1N ®��� ���L�06� � 02� ' . «% M1 N ° � VIC R a Em _ -. -. - -- , F F ,, a BB „e„„eee vs sv. 3F RA s2r Sid ^"1 -,i ;5 EE R 1 n n 0-. ° �8 RAe28Re678e Nira RR �R1� A FFFFF « « «4R "a4 NR RR. R R R °$ '8 I �� RRR R 2= :8i^ F f R4 « « «� n� «��e gigfgg j 2 R na�sao2Ra6s.a I a0 ^e O r I O g? 44r « «PAr� FrF . s �RI. RE :$6 RRB 8a�8:z8 t• P.:- - Q !_ `RRF F.'^,G FG A� FGA iu, j si ^ ^ - -- ; �_ , U U d gAtRSa888s2 8-?- p' 282sa22222R 8e_ 2022226 U Vv of °_ese - n 4 � R « «Raaa3 - �,E9SS aS::R eea as 33R: ^ ° ° °° lu -- I y Z ! ZRER BR - -- -RR ; !! 4 U!!!!!! ae -R °-82888 a aa Bi ° " ° ° " °" g go 1 .::2'8 , 0sRA 82 1 28 ""88:^.BRAR -208 .: t as- "R• en n - -° — N.^ N s2a2a2sn2a2sR2 8A 2 sea s 2 '� o.� ���7 g' ` xiaasasr.zaecaa'RRkl 0 $ • g o ' Hes g k � ee2aRBe R2RSa R. R8= 22 :a qq O # __ OM A=286-a88R FAA i ; as 2 68e z, qq pp @2 °� °_x222 J ° 'glda2-25 i21g2s _ V R RR_AaRiFARF - _a fa R8cAi2aaRaRas2s<2 ■■ xz . V V e 1ao7282 =An88s n 2 28 8A8R8 °R EFJ i t i fr •P 21 $ .a;:aa §s a t b 0 e 3 CO 3 g�•es28gR g• 'b ° f 1111111119* r^ 1 iigSilg$6 J + j 3 2 0 °0 e 8 e�e32e8AR8 • U 5 V a' N Aq000 ° P iii Q 2 .e- ee -___ v 1' X 47 w F � p E .7 Z' 77 i t . �i Wh " W A 41 d ` 41 1 n . '' � ®��1 LIMVPP 49 vev O _. I 0 °. «R2 G. 'WE"� =7� W 4 `, o 883888R8R2s2 H 4=1,, 10 ▪ '' �i11 a y e w9.la Y L +� rl� y {+` { WgW q �^ ° 1 r a .. g. o o l ;gg,,! F v a g l a° w g a x L r ¢ :ti. ° 111 , !: , ® ��� � V s � ' 8 i n U � # �� ®SOD a y _RRI 284� E� i•,,, ins or oow . _R FR.I1 0. =RRFR• 14 m 3 y 3 y 77 I % � '�r F4 Kr ;: a r FF @ k l e . 0,11NN2g 8 �o <222Z2Y^<Y2 r$ 2 404 j 2. i - n � ., � , • �RF`�A ER RFR A4$.1 IBEHRBl Ril ii ill g '1d 6 Rt1N : 5!!!2 2 Ve, 2E2A.J' 507 -I r ,, i V :,;a e,s - 817MIPPORIKItgr .'�,_. S Li. ..:.'bbb .,. �, s �' _ IsEmmi F G� k - 4 Y iii ¢ 9 °: 1.!!! N s ° e286'a ! E_ P ry'',..h6,' � � � F se° Bs a a422at22kiiiw�; e° r � y ' b Ek LI �� tsa cp taa ��s r ` � � IP .I % ri R R ? s _ £ El r r 2 a s a i r 3 7111,r IC va a r iii $ > 11 a`a„ e � � � � Via - $22222e�:� :��a22��2�2� - = -_ gl $ g - IbiipAiligil - Wit‘ h N;11 7, egth tir 2 /11 i W °R' '$0 °00202 . E2saaR82228 O ° ° G ma iiiii iii i cji #11 121 ”2222F ' Ill Lii 1 n r Arm ��tr � i A p e8s L ^ 6s ^ °sa66 1.. 3, “ •, 5 51F Ev il t .., t - h i° 2 8 � eee @S:h Y e ee d -e $ , I' ' v i , 77 , E F iFi'� r4' -R Ci t . t w, tti 3 M L ui ri.� . zr a.. e Y O n e ffi i s s - k 2s t 8 R c t' 98 A L 1 g 8� l i °8862 2& ld� da� a 7�a r A. ! PFt B �� S' _ F r' c� OF''g , I. Y ” o �� ,. s. m E Ac,., S P a,.. 8.5. �' � ' !82� 2226 gL 2AR °!!ee6 �{ r 1 E� R F e ,s a ¢ E `[ W. I.L '2y _ r�� C ;2R &AARARFRRi`�� ,d i H c, � .. 4 1 �. I t I • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Appendix C • Proposed Drainage Area Map • • • • • I � • • • • • • • • • • • • • • • • • • • • • • • • • • • • 5 • ` € _I : . , ■ W 8 U rwlos3a • 1 iv Q k 1 I ) 1 u o a Z Q 4, U y 0 z z ° c7 w c' L § m 1 a _ U " ��88 * c ? w a w w w -a tt ¢ 1` N Z 1:^1g4 RgF Cj yF k m F'uSo z a o a w aL a a g m c 8 c w w 8 2 0 '6 ? Z F z2 oz o z ro zp 9 z % i g LL m ° > = Z CO Z w a� a� a� ~ = z Z ga qa 4a r -.-,'F,§-T., g�w Q ojct a a a LL w3 0 o o v a o' 3 11 O o ;20,20,246 1- _ 0 3w 3w 3 3L y� w 8a g o w w ow o p -i * �m.:3 U oV N K I r� E rE w rl * §W wI w w r tt wr m U LL N LL LL do I . a 8 U U U U Z a O < a U * * O wN M - N LL r Q g $ * +B g w v_i z� w � � � � w z 0 < F 8 8 8 8 z� Z a o? og 28 2 28 28 a C U 0 0 0 0 y 0 wam ,153 a z 8 w a< 0 0 0 6 < o am z ¢ww z o 0 o O w¢ I ❑ D r CQ 9 . - 8 T z � 6' .E 3 1.%1 zo 5C3 LA' To . :::MINO=" �ir.di ,ZM.4rin. _ ! .... __ et I O B I1+ sr j 1 � ,1 w e sti t °t I. r I 1 % ;z > CD E 1 C9 , i N ' . " = �" z y e o ° jj c9 ' \ i P - � z I / m al le i [ 1� a f I HI �' \ - i,L- i 4 -kil i i I 1 U co 1 :. '` ma c ... ....... ..::. ........ .....e_.. ......._..,.. ...___ .. .Y <_d . F i 1 im I.: L ' 7 � 0 ;t o. t m. y 1 LZZ'SZZ 3.6Z,41,14N � „.61•-• ' N 3NI11O1 O9SOdOHd, 2. 1 y f- .C6 bZZ 3 .,6Z, 'I N `i ," 3N11101 ONILSIX3 _ t`, a 1 `,..T, # U 0 1 I s 1 00 �`wi I S , 1 j l • • MI xn Inuen0 EMOIVVR I.LISNn:nommnwKZwm1u1., WO, v :OWN !IWO MILS I mimes. awn n1110 .w • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •