Loading...
MIN FEB 18 2003 (2) [7-w Caldwood Cutoff Drainage Study January 14, 2003 Presentation Format I . Description of Caldwood Drainage Basin and Components II . Study Methodology • HEC-HMS • HEGRAS III. Drainage Improvements • Channel Modifications • Structure Improvements • Detention Pond Enhancements IV. Recommendations Description of Drainage Area • Study Area • Location of Channel • Existing Structures • Existing Detention Ponds �•�n4"'�'�� k t � yAb •, ,I is i I °�• a'p.. R- �'. 1 t 4A . oe JU 3'45 k� 4 ,r=� i�'�.•"�'� 1 I �4. �� °E; L I 1 r t... r•,c..� �• �tY r-r � � w .at a + 71 i is f '� 3 ' ' r���� �''•' { � � k'SY."G H � T'.. 4 is �. �. :�", - 7 •I� h �, � a ,� ,r1 ti cep '� � 4 L r a I � 1 f � • i � K n y � y ry u.nf° y 3 i 411 " w Al • •hd�v,,, '� _ �1rFl e r s x w ss ry �. 4 a�'�"����* +334 '• ^� Mss F� v ° TIN NO- k _ ..sw x — . y r e % = n x X'' ' ... z rUv,, g 3k �`4 Y p?� b � *Y �:� o: ��,;:,. �{'�'�",i rte* •;i >. H �. ""�, �#* s d � #x ' A 1a AU AM 44� a a e �W MT aw r ; t , i I un ., a v a ^ 4 t����.+� 1F •: �� �:. �, ��� Cis„ r r v . COT ^ - �.rf, �� �� � �t�t����t"i'� � f� ,/�� � - ��k;`,�"Sty✓�•"� ,...r�, :f �1,.'r' .*¢ 'at •, �..Sy`�,,,„ _" �f)�f�! Sf g �� �'f }j •+'�y.�X,#�fT+aap', t�* 1�,y,+a'"�+ #W :�°����f�, '" p-�'IY" � t ds`F 'a:� k.: F ;.i Yi/'. �,#: ;7 'iv' ofj �i•s6/ .. s F-� "# �`t" 4aR°'94J i't*`. t rs y * � •' Y,�,�g�. ^s'a� �i�.�$� .i�„4.s �3�yi , 1 _ i ;:. :.'� .. ? �#j W ..gyp NYy { :.sera .'!'.r°•x _ �! p�'Y"W.4 �a �.�,.�.:3.3 t y�f�; fr„yi?�.r �, 3 r,.� R��: t �` „g,_-7'� �i�u ... ��", rI ky t' y �i.� N «" �•1 �� � 3 �4,{ij �ry� 'f sue. a 4 s z qw op i i F+a:•_..� ate. rw �Y. °��;. • kAn E 56'.�r� ,«»a,,.*�""� ,:�- b ��..�'..�,�._....+,.�Ss.�..isn+:.-.. _:..,.:..wn'.,s..H r�° � ,Y - ���,Ij?�iil ��If�•� r t .r' `t .-,a;5+�"nwE�..;. q � •: ��,�,;a.,:. �-a....v� 11 . f' '� � a';� •'�,�. +'�� .r� �a � {� - .yd,. 'may n �+', kill " - J/fir A s j T i u t } tr,- • r.. r „s, <`'r ' ;:1 7 r4%y 7 "7 a• 4 t R• < y.RJ �. .e r K,•wx; ' r,rw f$�a•`.a °s. r C 5: Y ar ? s l .+ ,�'jI'!' r �q, r f !/ i aC rrT '�,"4'y7f:.'' -f, f r ry � 1'r t � f ✓.. i 1 -�,7 � ,5 a - r. r.r f r 7 td e � r +� it # + e” t r.,�/,. ia,��trr. � 't�� •'rf�'� L�b ira r, r 't� r � use r r A �� a �� �G, C g✓-a' 1} . 1 rr, f � fst /i� e 1+ 51 �/ ✓��� ,r, �� �1✓ r.wa r '( � F • � r Says i r tfi� a lr j b�r�}n"rI �) t � y" �f y� rrt rf f 'tya*iy Y ,r + �r3'`ir ., 3'�t w' - '"r } ;lr; JY ° t 7`� a ➢, s' yta�t R' -Y s7i ✓ j t :`ft , r l, " � z 1 ' t s .iro}t,�y , �, f � ,.�: , �4 G^ti�3 YiY�4� rt` �:� Y�y � + ',� .7�,� � �'+€Y r wr✓'�- ' 31"11`411� i r S f"ry'Y s f1G -f3 cfa{�'M.7` r �yj�t {S f'J'a'y.TM'}t ii d1M1 ,r 4. r; y `,�'$` � rb' .yZt.v.+s( r ZC��t�r+ t �r�'xttif•W�f rr��. �"�.! r.,`kk � � r �� t t ✓ a v.. f �, 2y ^t S r 6 i t^" '4.,�" '! l«: rt J e!�`' i+1 ;,�r �f � y a � rrr :I ? >`. r 5 '..�� ! ;if*tr�+7�t.":(` .�"/, � .�� 1. .t x!�R Y , ,�pr'F�liv` ��F x`�1 }•. tA�� S+.:a,.t= t tf.4,�'}."45~1�q. t7:' '�F*»2� ��il ,�i�. .. • k y, r y • ' li,. � .� <.:.. ., k.rr .'.� ��.:,A`-, �.•. �.r 7;_,< ', a .r.� s ><. 1 R - :x^.° r✓iT,:'r✓+±•, rt,. r r'�'+'^ ,�. +- ,a' f#.,•. ,.:,, r , b ,....,. r r r . "'r- , >, ^r.. !G 7, f%. kar-r. a:M r. U'. .,,,. `1..-,. ,.•.� ,..rt,...� p;q.. .,-,., •�r`'""; s.. .... ..- ,;:�, e, ier •tk�' � : Y: .r y';i "t .a s J 1.. ..3 N'`f r lY( p :1F' j t• Ai. �r Y' .,•<. ,, .,. . f ,,.t., q. ..,,,'jv r .. ,.jv'..,•.F;r. 5,,.,; r:: r.:.. r. ,,.i;,., a., .,�' '• r. 'r` ,Y,. °1'•t'y t.. ,,1„' ` .. ,...f •;<n.. .+.. '�.� .e!. ,,.. +,:,..�., ,�.'S,x,, .,. .. ;.r,. a. ,.... ... ,, ,.,• .1 !r,• 11., i" �''• re's, � rr ., ,.. .,.,: � ,...... f.. ,..r. ,„,-,r s..4 .,,.� U ... . .nref..,L�,'� � .�'!�. .:. rr_ar_.. .r. -.�„ i,J. ,� G�•sl. ,.4._w, � .:•,.,. ._x.,,,�,„t,.) �r x- . :�,.. ,. >r ,�.. ., r,,✓,� .;,...r .R. , . '•r.,. : . ,. ., _ s .., .tr s.. +;,Xe ,as , '+�_ t y.. .,.k , s .ie . ....f ,. > n�. , a.✓._ .. 1 i.�.. ,(• n,e... . .., s ,, ,...�4� ,{ �K"(.. .r '1!}�,ryf' ��” � } t'�P� ir. a -y'�. .P,X.,s,{sr 5+r`x” :R 1S.3 .. +,. r -.'a,,.,, lf.�•, d{n,...,atJ .y,� � _. R :,. . t +�, ,> �'�I�,kr t.;<r4. .,.:ryi, Sr ,, ^�',.f�VAN s1' rye •r. ;uq ,. .' r :< f-- {. rv.,1. k "� i :±' G.. ✓ C'• k" r J" l°l,r f: t rba';r�r."t.r a? iaJ,!d'w+.,' r 8' �r'7 'i. t,'!����( •,.r y�•., •rJG' r _ `iw • , i� a \ ,,4'a'Er; .''r f� LC r�� •�� f�. �.f a .,c;*,y �.Y•:.:rS:, +I t r:f 0.4^+,,. ►6, `�,a+.�,. .,,1'L 'r4f '.. j.° e6 s. ��.w ., S +, �, # x".-, ., L,,e.•. r '. v `.'�d'i t h,�,,,, .r ,!�`at:»t•,.,t.%.�r''�"ivh. o►..a1 rY�r ,r�`�'�&�4;••' .� yr./. _ ."_� ✓�t� .fi•4'- �'^� '�►"' �v' J°":t"_,.'`'_^*J 1j, "Y q, :4 *`l'a4' 1,`1 `y�+ Y'tR*Y t''~ .�•1 a' �j .1 ,rr3' 4 } ..i�'+'.1'Vp m�.± a •a 1 ��, e'r �iy-}� '�'f--'�"y+r�/p•i� err. +bdz'Y a��. N Wei/r� �♦ ".% c �rP. `/w �i. ^.�;� �=�ta f`� f � � �u.":tr y. ^'iji i 'a •,cl�i e � '6"(�a.4 '.w.�.. f�rc r�'!•!�_ ran w:.v :G;> ..• °i �J�o.�/+��`O r,,.i )r,. ..i4.. �".�+Yr .1�. 2�� .•ir: ^ ' '+ r•^ "+" r�sr f}. q"1. ;'�f.� C=--w..i ,�..rA /J.S.' `r: �; •�``o 'C..a." a. ..«�.n!. .�/�e�/,(; .irl.I%'/.cF�+, •� .'~'"` ,, .`Fcr rr'; t iy :i.,, it J• ° w ��,'`S , ��.. .s SS+pr��Y !J7',°'� a,*v" ....•�4. �y/ '7u ` )g�� -a- 1•�•.n, p;T '' yic �; ..� > .rer .JT:` ti ice, �' •ry!' + "yy. •� , "1 . �'zf`l t�M;,J" Y� � C f•i .�l, $' 'p,; .�n ♦*.t w� � �vr,.1 � + .7e a` e.���'}s t %n:: .r ,;�r t in. Y. ,�• r r �` .. ,I'�h. �. r P` • 1• fI �j ..A`.r,�� y 1 (i 'r�'vy�•vy y,, / „1 I ,F .. .1.. �, 1 y S�j/c }w- P�r •- "' T'�'°•i1 .�.:,y,� ^,�Pi.�•rdfL .y�c, .,e rr.,r-sEC:•% •S',!' j F' S. - .[^� .r %�• ,^ 'A '� ..t1 s�i'f .� r r n'.,�.', . .i! ,.' +.�'>- F . .> : „'"j r,( � �:t,�J r � it ! s.. +�1 r Y•j} `\ y { ni.;.,4 r •' r H /I�"/' `yam, T..r �nr '1� `_{ .�; �� :� 1ti tY ..� -e..:3�i i r �. '✓'W mss.; .�i iii`fl ,J � R•a{ �"9� '.I F_e � .t.. - ' �'.�'!(t�° 'Y�^f� �6''� �J''��,7's' '`'',,..:� r � "".:• i �<� L C "� <"� r.•� rr 6 r Y, a !�, r �.� ti r \ •\ �.J'X: 's '� �\'�Jl,'�`irx sC' �l". ,h '• f � 4 .. 1 � = s trr.. +- 1 .R ,^4 'a.. - .�..�. r �'.3- C � �.,..�.1` �.. .a-+" h,.{.* � f ... r...6,' r 1r'P .•,i :.fi'r?�" r�., .y..,..1 it•. '` .fie r r 1:'✓ �. r u:t°f- �.. K ..Y •'.s` :'A ) �.'7�r �py.4. .;. ".� .ti *�. �. f-r h' • s.�P,� 1. ..nw- .• �`�vw.9 5 �,°.�" ',xw`"L. - Y; ,� rM1v.: .r .✓, ?'.< +...4 ',rf. ,r ,-s �r r ,,r.Yt'.J• �r �li!7;:J,v Ja.� ta•�.ilti` '��.`i'. N f ;. l4 c r,r,""-,.. !, .''. :-_<1,:+,`,�• r.. :,- �e'-�r, t E.,..� i . ''.+It � < ,,, ';n[a... .i e,'.`"�G+;.{.t+ �r,.,,.,,; Jr`:, ^�,: •''� ,fir t. t rs t -- .,.,z! s ,�.� dr / ,��.�.}is ,.. �$'; � r ✓s r� r r ""t' •, ... ,. . •`"r '.'.0,.fit,, n .t.�„a..s�. ,• �.� r,rl.ry;....�. 'r`���-tl;d A;.r:;ti: '��T?¢�.,,_+,Y.$�.,.•./�-�j'a a1..rrF,.•�✓f�;,,`..,'yt...°.r-,.}.�ftq.,fr,$.!.�..:x;/.�.:r,r:v'j+.'r�*°,T.�':<+�.t f r' ..f«>...: r ,�(";rJ.'R Ji �-.�'1.'.�,�;`i.'�.0�•+i, �fi +:t. dr`r_ �'.wk�� -�.y<:•``;,�;,..t.�y►�Y'{�r l.J i•,r�7.,'t f#7�.-r J-4 y71 a��ir r�� �-;..4.q:f.te.c..tf�*•Y�-.p�'..t.r�r W E.,.':«°.2•'�k'S'f r�rf�I•�” ,*. „ter..r'`{s".�'. "r7 r•A:r;r.�p}r �;•ay.�..�,...t-�4.��r e•t,.. .A: ..a �".r' y��`. ,Ma�• .tL ;;(: gar -"�••..�"��w�r, ...�•/•5i'rr` e�rj �e'..,-�� �r°i'�'v'..�+1. v+4�"� �� '/yl.z�#,,r [. .;,t,fr.,a 7✓',-a.s^..}z`.`..j'h �.:t� .Tt`r• 'rY�•+ ^ ia, •-.i '� i 'r >'j .z��•N, �.�7�. i :Jw: .x. w i u r�.r ..sue- r �J •',fit, kt � }: 'r .Npe+LsY@ t } WK .. s 0A, Al 1 A ui. w . t t `3 a a ,,-utl t r tea. r 'k "'_ ''": Y n °,�. r,k.p�} '✓'.y G�t vw APT . Av IF ht1 f4 � � v } x w g7 ,._� a a �,,. . � >.,..� s,�.:.���`�°rtraw'�''��z'��i-T. p`�., .^€��� �v��`1e•3Y^� ���r l $rs r ° >s ix � Yi 1 d 1 I i P4. j> l ° �1 A>` r, �,'i � al' 'JP r. � "A'i.y f G"tf.F 1, r�4 ?'.ry,p .a,;.y+ 1'l54_t .t.�.' ir/n. ;• J., . + ° y .;, I:�4 ♦.:. i/r+ ti°. Yr' � r';4 ° d.�,t}�°Lr ' ' � Y..� u � ,, ltd ' �' t oaf r r t.." tP {"¢°• t srr��� l ' lb J rv.,, i ac .j �(4,. . ;; a " ti'� fir � `try {� i'! ''�'• ' r�1 � ��,t ,� r ^s �r�:a4`aL st }� t 1` ,• i i`f "idi � {K . Wq is ,Fev la _ t — s, [ , n wr ,w z r 1 , p r { A ltsd. ..gyt"' ta`�` �'r ,Y� >•,116 a 3' 'E ar t .. l rri ni .z•, � �r�"r,l� ��. t �7� t � r �� � �:��� r ,r i ,n / � + � j �� �fA � ; tiy, •2 '�� f Tr � +., 1. t. t yr. J rt `AY e � �� k, c�Y�'� k�' « w 0 0 0 Mina N HEC =HMS US Army Corps of Engineers Hydrologic Modeling System FLOWS Development of Existing HMS Model A. Drainage Basins 1 . Time of Concentration 2. Storage Coefficients B. Model Ponds 1 . Utilize Existing Plans 2. Model Weir 3. Model Outlet C. Precipitation Model 1 . DD6 Rain Gages 2. Theisen Polygons 3. 1yr - 100 yr Frequency Storms Sp '111 and Outlet On Pond r x . b h �, /WMW All � r�� vo moor r ��r Development of Proposed HMS Model A. Drainage Basin H12 1 . Increased Time of Concentration 2. Increased Impervious Area B. Detention Pond on H12 1 . 100 Acre Pond 2. 8 Feet Deep 3. 672 Acre Feet of Storage C. Improved Conditions Above Ponds A,B,& pond on H12 1 . Increased volume of Pond A 10% to handle excess flow into pond A without increasing 100 yr design water surface. 2. Lower the weir on pond B to original elevation of 24.5 to assure 100 yr design water surface was not overtopped. HEC =RAS US Army Corps of Engineers River Analysis System Water Surface E levations Development of Existing RAS Model A. Channel Cross Sections 1 . DD6 Surveyors 2. N values (roughness coefficients) B. Existing Structures 1 . Utilize Existing Plans 2. Measured in the field C. Boundary Conditions 1 . Tail Water Curve 2. Developed a separate HEC-RAS model of Hillebrandt Bayou from confluence Caldwood Cutoff to SH 124 utilizing 1yr — 100 yr Frequency Storms from overall drainage model. u ,s v s Y RrR „ w..ca� Erv1d',m.hbiYml� fw b.ra Miw"r i� w..wM.w�� �....r�... s at nw....�.� rr,.. lr r.,•� 1 5II y..'�� :��°.. ,I'�,y �'+py '• { all➢➢➢•➢➢ m # '• ,.� _ av�."ti'■1 ®����tr��a �e�nrra�?p #rrrrrrq Intaam} sl��,rorr� r��ty r-rr_i� ,�ae±k s+*. ��� a� � ,� ' I u , a i 1 1 p # .Y lot 1 , w .0 50 F K v aw y J • A u i : .y�� r: ' '' ,: �"�A��S •�'- � .iiYY �° gar ! a. x r 4 N A r P s- �, NOW goo - ..fit E qW To NOW s irk r#; 05.8, wt. M1�} 7 k. Y S i xt� c 4r ter" t f, e 5) F t Z 'Y i f Elev. (ft) O N W -P6 U7 m v co to O N W -P.- m 0') 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500 12000 12500 13000 13500 14000 14500 1 5000 CA m v FA 0 Q m 0 c X CD Cr a� CL Development of Proposed RAS Model A. Remove Existing Private Railroad Bridge 1 . Proposed 30' bottom channel in the area near the bridge B. Channel Improvements 1 . Proposed 40' bottom channel south of College 2. Proposed 60' bottom channel south of Washington f 30 f "'ter owl 40' DOWNSTREAM OF SOUTHERN PACIFIC RAILROAD TO 730' DOWNSTREAM OF THE PRIVATE BRIDGE 950 FT eel f COLLEGE ST. TO WASHINGTON BLVD. 4300 FT 173 j f WASHINGTON BLVD. TO HILLEBRANDT BAYOU 3900 FT How HMS and RAS work together to produce an accurate model 1 . Run HMS with existing parameters 2. HMS generates flows 3. Input flows into RAS (existing geometry) 4. RAS generates volumes (water surface elevations) 5. Input volumes generated from RAS back into HMS 6. Repeat steps 1 -5 until. ... ........ O 4 25 a z Q 25 � a 20 20 15 15 10 10 5 5 0 0 -5 Modeled Water Surface Matches Measured Water Surface -5 -10 -10 EXISTING CONDITIONS, DURING T.S. KENA EXISTING CONDITIONS, MEASURED After you have a calibrated model you can start modeling all of the proposed improvements such as. . . . The Channel improvements z w wQ x z H CIO U a U O 25 z q 25 20 20 15 15 Conditions Folsom Delawar Gladys; . Circuit Phelanjj Ca der I Raii road Priv to College Washington US DS US DS US DS QS I DS US I D US DS I Up 11 DS DS US DS US DS Existing Conditions Modeled 24.1 22.2 22.1` 2$.9 21.6 21.2 2 1 21.0 20.1 1q.0 19.5 19. 18.4 18.4 17.7 17.6 17.4 16.1 15.3 Total Loss 1.9 .2 0.4 0.1 .3 0.2 0.0 0.7 0.2 0.8 Existing without Private Bridge 23.8 22.0 2119 1.6 21.3 0.7 19.7 9.5 19.1 18.9 18. 17.9 17.7 17.7 17.6 17.4 16.1 15.3 Total Loss 1.8 0.3 0.4 0.1 .2 0.2 0.1 0.0 0.2 0.8 Water Surface Improvement 0.3 0.2 0.2 0.3 0.3 0.3 0.3 0.3 0.4 .3 0.4 0.4 0.4 0.5 0.7 0.0 0.0 0.0 0.0 0.0 Improved Channel outh of College 23.4 21.6 21.5 1.2 20.8 20.4 20. 20.2 19.0 8.8 18.4 18.0 16.9 16.9 16.8 16.2 15.9 15.8 15.1 14.3 Total Loss 1.8 0.3 0.4 0.1 .2 0.4 0.0 0.6 0.1 0.8 Water Surface Improvement 0.7 0.6 0.6 .7 0.8 0.8 0.410.8 1.1 .0 1.1 1.3 1.5 1.5 1.6 1.5 1.7 1.6 1.0 1.0 Without Pdvate5Bridge and Improved Channels 23.2 21.4 21.3 1.0 20.6 20.2 20. 19.9 18.6 1 .4 18.0 17.6 16.1 16.3 16.3 16.2 15.9 15.8 15.5 14.3 Total Loss 1.8 .3 0.4 0.2 2 0.4 0.1 0.1 t17.4 0.8 Water Surface Improvement 0.9 0.8 0.8 0 9 1.0 1.0 1/0 1.1 1.5 1. 1.5 1.7 2. 2.1 2.1 1.5 1. 1.0 1.0 Measured 23.4 22.1 20.4 19. 19.1 19.0 1$.3 18.2 18.4 17.6 17 16.4 15.4 -10 -10 EXISTING CONDITIONS, DURING T.S. NA EXISTING CONDITIONS, EXCLUDING P ATE RIDGE M4PROVED CHANNEL -- IMPROVED CHANNEL, EXCLUDING PRIVATE BRIDGE And the Pond improvements z w wz C a �o Q a U Q o w 04 O U a U O 25 U z Q 25 � a 20 20 15 15 10 10 Conditions Folsom De lawar Gladys N. 1pirc ' el n Calder 4ailroad Private I College Washington US DS US? D US DS US S US DS QS DS US DS US DS US DS Existing Conditions Modeled 24.1 22.2 22.;1; 21 21.2 21,.1 21.0 20.1 9.8 19.5 19.3 1 .4 18.4 18.4 17.7 17.6 17.4 16.1 15.3 Total Loss 1.9 012 0.4 0.1 J0.3 0.2 1 0.0 0.7 0.2 0.8 Improved Drainage Are - 24.4 22.6 22.5 2 !.3121.8 21.4 21.3 21.3 20.4 20.0 19.7 19.4 18.5 18.5 18.5 18.0 17.8 17.6 16.2 15.3 Total Loss 1.9 .2 1 0.4 0.1 0.3 1 0.2 0.1 0.5 1 0.2 1 0.9 Water Surface Improvement -0.3 -0.4 -0.4 4 .4 -0.2 -0.2 -0.2 -0.3 -0.3 -0.21 -0.1 -0.1 -0. -0.1 -0.1 -0.3 -0.21 -0.2 -0.11 0.0 Improved conditions above Ponds and Improved 122.7 20.9 20.8 29.5 20.2 20.0 19.9 19.9 19.0 18.9 18.6 18.4 17 17.6 17.6 17.0 16.8 16.8 15.71 15.0 Total Loss 1.8 013 0.2 1 0.1 0.1 0.2 0.1 0.6 0.1 0.7 Water Surface Improvement 1.4 1.3 1.3 1. 1.4 1.2 1.2 1.2 1.1 0.9 0.9 0.9 OJ8 0.8 0.8 0.7 0.8 0.6 0.4 0.3 -10 -10 EXISTING CONDITIONS, DURING T.S KENA IMPROVED DRAINAGE AREA-H12 INCREASED VOLUME IN POND A IN D AINAGE ARE H12 And the combination of channel and pond improvements o h w ' 5- 0 a ° Q w o U a~ U a U a d 25 z w 25 20 20 15 15 10 10 Conditions Folsom Delaware Gladys � N. ircuit P.hela Calder ailr ivate College Washington US DS US ! DS US DS U DS US S US DS US DS US DS US DS Existing CondQions Modeled-Kena.10/29 24.1 22.2 22.1 21.p 21.6 21.2 21.1 21.0 20.1 19.3 14.4 18.4 18.4 17.7 17.6 17.4 16.5 15.3 Total Loss 1.9 O.P 0.4 0.1 P.3 0.2 0.0 0.7 0.2 0.8 Combined Improved Conditions -Kena 10/29 23.1 19'.9 19. ' 49T 18.8 18.7 18.6 17.7 117.6 17.2 16.9 15. 15.8 •16.0 15.7 15.7 15.6 14.8 14.2 Total Loss 3.1 T2 .O. 0.2 0.1 0.1 0.3 0.1 0.3 0.1 0.7 Water Surface Improvement 1.1 2.3 2.4 2.6 2.4 2.4 2.4 2.4 2.2 2.3 2.4 2. 2.6 2.4 2.0 1.9 1.9 1.3 1.1 Existing Conditions Mo - 100 Yr Storm 25.1 24.6 24.5 23.0 23.0 23.0 3.0 22.2 21.9 21.0 21.1 19. 19.4 19.5 19.7 19.6 19.0 17.4 16.4 Total Loss 3.1 0.2 0.1 10.1 0.3 0.1 0.3 0.1 0.7 Combined Improved Conditions - 100 Yr. Storm 25.0 23.9 23.7 22 9 22.4 22.2 22.1 22.0 20.8 0.3 19.6 19.3 17 7 17.6 17.9 17.5 17.3 17.3 16.4 15.4 Total Loss 1.1 0.4 0.1 0.1 .5 0.4 0.1 0.4 0.0 1.0 Water Surface Improvement 0.1 0.7 0.8 1. 0.7 0.8 0. 1.0 1.4 A 6 1.4 1.9 Y.9 1.8 1.6 2.2 2.4 1.7 1.0 0.9 EXISTING CONDITIONS, DURING T.S. NA 1-XIS IING CON01 DONS, OURING 1OQ Y S FORM COMBINED IMPROVEMENTS, DURING T KEN COMBINED IMPROVEMENTS, DURING 100 ORM N f+ 0 V A. Channel Improvements South of College Up Stream of Gladys Down Stream of Calder 0.8' reduction in WSEL 1 .1 ' reduction in WSEL B. Replace Private Bridge South of Railroad and Channel improvements Up Stream of Gladys Down Stream of Calder 1 .0' reduction in WSEL 1 .5' reduction in WSEL C. Detention pond on Drainage Area H12 Up Stream of Gladys Down Stream of Calder 1 .4' reduction in WSEL 0.9' reduction in WSEL D. Channel Improvements South of College, Replace Private Bridge, and Pond on H12 m of Gladys Down Stream of Calder Up Stream Y 2.3' reduction in WSEL 2.6' reduction in WSEL Pond Max Existing Conditions Improved Conditions Area Elevation Available Kena 100 yr 100 yr Served 1'Below Storage Inflow Outflow Peak Peak Inflow Outflow Peak Peak Inflow Outflow Peak Peak Levee Storage Elevation Storage Elevation Storage Elevation (mi sq) (ft) (ac-ft) (cfs) I (cfs) (ac-ft) (ft) (cfs) (cfs) (ac-ft) (ft) (cfs) (cfs) (ac-ft) (ft) 2.36 27 794 1188 200 428 23.4 2558 1 1359 774.3 26.9 5502 1537 841.5 27.2 For improved conditions volume of pond was increased 10% to handle excess flow and not increase peak elevation Pond POND C UPPER DRAINAGE FUCTIONS Max Existing Conditions Improved Conditions Area Elevation Available Kena 100 yr 100 yr Sensed 1'Below Storage Inflow Outflow Peak Peak Inflow Outflow Peak Peak Inflow Outflow Peak Peak Levee Storage Elevation Storage Elevation Storage Elevation (mi sq) (ft) (ac-ft) (cis) (cfs) (ac-ft) (ft) (cfs) (cfs) (ac-ft) (ft) (cis) (cfs) (ac-ft) (ft) 0.58 36 490 723.5 0 155.1 33.5 964 27.2 327.9 34.9 964 27.2 327.9 34.9 Pond POND C MIDDLE DRAINAGE FUCTIONS Max Existing Conditions Improved Conditions Area Elevation Available Kena 100 yr 100 yr Seared 1'Below Storage Inflow Outflow Peak Peak Inflow Outflow Peak Peak Inflow Outflow Peak Peak Levee Storage Elevation Storage Elevation Storage Elevation (acre) (ft) (ac-ft) (cfs) (cfs) (ac-ft) (ft) (cfs) (cis) (ac-ft) (ft) (cis) (cfs) (ac-ft) (ft) 0.103 28 65.7 242 63 27 25.5 341 105 53 27.2 341 105 53 27.2 Pond POND C LOWER DRAINAGE FUCTIONS Max Existing Conditions Improved Conditions Area Elevation Available Kena 100 yr 100 yr Served 1'Below Storage Inflow Outflow Peak Peak Inflow Outflow Peak Peak Inflow Outflow Peak Peak Levee Storage Elevation Storage Elevation Storage Elevation (acre) (ft) (ac-ft) (cfs) (cfs) (ac-ft) (ft) (cfs) (cfs) (ac-ft (ft) (cfs) (cfs) (ac-ft) (ft) 0.25 26 92 299 88 54.8 24.6 411 220 87.8 25.8 411 220 87.8 25.8 Pond POND B (SOCCER) DRAINAGE FUCTIONS Max Existing Conditions Improved Conditions Area Elevation Available Kena 100 yr 100 yr Served 1'Below Storage Inflow Outflow Peak Peak Inflow Outflow Peak Peak Inflow Outflow Peak Peak Levee Storage Elevation Storage Elevation Storage Elevation (mi sq) (ft) (ac-ft) (cfs) (cfs) (ac-ft) (ft) (cfs) (cfs) (ac-ft) (ft) (cis) (cis) (ac-ft) (ft) 1.32 27 477.8 621 70 153.2 25.1 1137 221.7 400.3 27.3 2301 455 375.6 27.1 For improved conditions weir must be at 24.5 Pond POND D DRAINAGE FUCTIONS Max Existing Conditions Improved Conditions Area Elevation Available Kena 100 yr 100 yr Served 1'Below Storage Inflow Outflow Peak Peak Inflow Outflow Peak Peak Inflow Outflow Peak Peak Levee Storage Elevation Storage Elevation Storage Elevation (acre) (ft) (ac-ft) (cfs) (cfs) (ac-ft) (ft) (cfs) (cfs) (ac-ft) (ft) (cfs) (cfs) (ac-ft) (ft) 0.97 26 800 2382 0 671.7 24.2 Basin ID Description ,' Caldwood Cutoff A Existing conditions l Caldwood Cutoff B Existing conditions with H12 improved I Existing conditions with H12 improved with detention Caldwood Cutoff C pond on H12 (Pond D) Improved conditions above ponds a,b,d and increased Caldwood Cutoff D spillway to handle excess flow from pond A Improved conditions above ponds a,b,d and increased Caldwood Cutoff E ivolume 10 °/ to handle andle excess flow from pond A { Improved conditions above ponds a,b,d raised spillway to s I I elevation 25 Increased weir length on pond A increased e I Caldwood Cutoff F I volume of pond A 25% closed outlet on pond A Associated Flows(cfs) Station 1 yr 2 yr 5 yr 10 yr 25 yr 50 yr 100 yr TS Kena 284+83 552 736 1002 1151 1349 1517 1707 702 268+00 534 689 838 1163 1330 1476 1689 689 251+30 806 1041 1296 1573 1878 2117 2379 1099 228+47 806 1041 1296 1573 1878 2117 2379 1099 221+80 1257 1645 2096 2511 3016 3410 3851 1799 202+20 1257 1664 2136 2526 3031 3441 3883 1863 196+00 2001 2710 3618 4177 5010 5702 6461 3394 187+00 2117 2878 3857 4448 5310 6048 6857 3671 184+75 2114 2877 3855 4449 5306 6044 6853 3667 172+50 2293 3126 4202 4678 5399 6285 7139 4034 170+18 2291 3125 4200 4662 5380 6264 7103 4032 155+00 2715 3755 5047 5551 6312 7180 8305 5038 136+70 2735 3797 5088 5608 6251 7099 8041 5094 130+90 2736 3791 5086 5605 6228 7094 8009 5085 100+25 2740 3849 5168 5749 6029 6398 7513 5193 97+50 2749 3860 5156 5745 6028 6396 7453 5181 96+80 2865 4029 5356 5942 6277 6545 7624 5408 83+43 2838 4007 5349 5820 6128 6339 6724 5368 40+73 3470 4779 6323 7177 7754 8052 8359 6781 40+00 3468 4783 6332 7173 7753 8052 8356 6776 0+00 3877 5461 7243 8105 8933 9461 9879 8166 Associated Flows(cfs) Station 1 yr 2 yr 5 yr 10 yr 25 yr 50 yr 100 yr TS Kena 284+83 552 736 1002 1151 1349 1517 1707 702 268+00 534 689 838 1163 1330 1476 1689 689 251+30 806 1041 1296 1573 1878 2117 2379 1099 228+47 806 1041 1296 1573 1878 2117 2379 1099 221+80 1257 1645 2096 2511 3016 3410 3851 1799 202+20 1257 1664 2136 2526 3031 3441 3883 1863 196+00 2350 3021 3931 4457 5238 5925 6696 3799 187+00 2484 3206 4189 4762 5568 6294 7110 4089 184+75 2483 3204 4191 4763 5566 6291 7104 4089 172+50 2668 3457 4405 4922 5641 6594 7415 4351 170+18 2667 3457 4390 4905 5641 6584 7386 4334 155+00 3113 4067 5207 5782 6524 7510 8609 5320 136+70 3139 4103 5263 5806 6432 7431 8309 5370 130+90 3136 4104 5261 5790 6404 7396 8154 5366 100+25 3149 4166 5394 5899 6112 6514 7734 5515 97+50 3169 4157 5387 5890 6110 6513 7710 5509 96+80 3294 4317 5575 6101 6313 6673 7891 5727 83+43 3260 4311 5484 5983 6164 6411 7416 5590 40+73 3896 5104 6524 7360 7772 8079 8424 7008 40+00 3896 5105 6523 7359 7772 8079 8422 7009 0+00 4333 5786 7399 8278 8968 9488 9902 8338 Associated Flows(cfs) Station 1 yr 2 yr 5 yr 10 yr 25 yr 50 yr 100 yr TS Kena 284+83 552 736 1002 1151 1349 1517 1707 702 268+00 534 689 838 1163 1330 1476 1689 689 251+30 806 1041 1296 1573 1879 2125 2393 1099 228+47 806 1041 1296 1573 1879 2125 2393 1099 221+80 1257 1645 2096 2511 3017 3415 3863 1799 202+20 1257 1664 2136 2526 3032 3448 3896 1863 196+00 1537 2050 2671 3120 3749 4260 4821 2476 187+00 1645 2207 2893 3356 4028 4583 5193 2767 184+75 1644 2206 2892 3355 4026 4578 5190 2767 172+50 1818 2452 3238 3752 4403 4891 5400 3139 170+18 1817 2453 3238 3751 4393 4871 5382 3136 155+00 2236 3073 4124 4786 5583 6144 6710 4214 136+70 2264 3119 4187 4858 5660 6117 6643 4278 130+90 2260 3118 4184 4854 5658 6095 6639 4271 100+25 2288 3186 4296 4981 5847 6036 6265 4404 97+50 2288 3196 4288 4975 5842 6021 6264 4393 96+80 2395 3359 4499 5207 6094 6355 6526 4646 83+43 2384 3334 4493 5200 5931 6144 6290 4642 40+73 3047 4114 5474 6477 7549 8002 8227 5989 40+00 3047 4117 5477 6480 7546 8002 8227 6003 0+00 3467 4788 6417 7544 8700 1 9388 9821 7457 Associated Flows(cfs) Station 1 yr 2 yr 5 yr 10 yr 25 yr 50 yr 100 yr TS Kena 284+83 552 736 1002 1151 1349 1517 1707 702 268+00 534 689 838 1163 1330 1476 1689 689 251+30 796 1035 1297 1579 1900 2188 2637 1099 228+47 796 1035 1297 1579 1900 2188 2637 1099 221+80 1246 1638 2091 2514 3033 3453 3926 1798 202+20 1247 1658 2131 2530 3048 3493 3962 1861 196+00 1526 2043 2666 3118 3761 4293 4876 2473 187+00 1634 2199 2887 3353 4035 4607 5235 2764 184+75 1632 2198 2886 3353 4037 4608 5232 2763 172+50 1806 2444 3232 3748 4407 4915 5440 3136 170+18 1806 2445 3232 3747 4397 4899 5425 3132 155+00 2232 3084 4138 4806 5620 6205 6785 4233 136+70 2259 3131 4200 4877 5696 6170 6754 4296 130+90 2256 3129 4200 4876 5695 6147 6749 4291 100+25 2283 3197 4310 5000 5881 6044 6322 4419 97+50 2282 3211 4301 4994 5876 6023 6320 4409 96+80 2389 3374 4511 5226 6126 6360 6528 4662 83+43 2377 3345 4506 5218 5963 6152 6329 4656 40+73 3030 4129 5497 6511 7592 8010 8233 6015 40+00 3031 4133 5496 6513 7587 8010 8232 1 6026 0+00 3455 4802 6436—__[__ 7573 8736 9396 9825 1 7480 Associated Flows(cfs) Station 1 yr 2 yr 5 yr 10 yr 25 yr 50 yr 100 yr TS Kena 284+83 552 736 1002 1151 1349 1517 1707 702 268+00 534 689 838 1163 1330 1476 1689 689 251+30 796 1034 1291 1570 1880 2131 2400 1097 228+47 796 1034 1291 1570 1880 2131 2400 1097 221+80 1246 1638 2090 2507 3016 3417 3867 1797 202+20 1246 1657 2130 2522 3031 3449 3900 1860 196+00 1525 2043 2665 3114 3747 4261 4823 2472 187+00 1633 2198 2886 3351 4024 4581 5193 2763 184+75 1632 2197 2885 3349 4023 4576 5189 2762 172+50 1805 2443 3232 3746 4400 4889 5401 3135 170+18 1805 2444 3232 3745 4390 4870 5383 3131 155+00 2232 3084 4138 4804 5617 6188 6763 4232 136+70 2259 3130 4200 4875 5693 6152 6704 4295 130+90 2256 3129 4199 4873 5691 6130 6697 4290 100+25 2282 3196 4309 4997 5878 6044 6295 4419 97+50 2282 3210 4300 4991 5874 6023 6293 4409 96+80 2389 3374 4510 - 5223 6123 6360 6527 4661 83+43 2377 3345 4505 5215 5957 6149 6307 4656 40+73 3030 4128 5496 6506 7584 8010 8232 6014 40+00 3030 4132 5494 6508 7580 8010 8232 6026 0+00 3455 4801 6435 7569 8730 9396 9824 7479 EXHIBIT "B" CITY OF BEAUMONT PROPOSED SALE OF PARK PROPERTY PUBLIC WORKS DEPARTMENT parks&Property Services Division 18,2W3 CRITERIA REVIEWED • Service Area —Barrier prohibits or restricts access to park —Overlapping service areas • Location —Accessibility limited —Poor environmental factors such as noise,safety hazards,which could include security issues • Site Size —Below acreage standards —Site configuration restricts use of park • Facilities —Includes facilities and recreational equipment COMBEST PARK 3395 Blackmon Lane Neighborhood —Est.1950 —2.8 acres • Deficiencies — Service Area Locatum — site Sim loll COMBEST PARK Creative Play Area —Huck Firm Raft —Horizontal Ladder —Log Roll —Slides(4) —Spring Platform —S— 2 units of 2 � COMBEST PARK • Other Facilities `r — Barbee Unit(2) — Baseball Diamond — Benches — Drinking Fountain — Crawbo — Picnic Unit(5) HEBERT PARK 2310 Smart Street Neighborhood '' .T - Est 1866 — 1.00 acres x f� • Deficiencies — service area Location .,�:,... — site sine ...... — Faci}ities HEBERT PARK er t •Other Facilities Tennis Courts IDA REED PARK 2348 Louisiana Street Neighborhood — Est 1921 2.5 acres r.. • Deficiencies N 1; — Location ,"•ily — Site Size IDA REED PARK . Creative Play Area - Arch climbers(2) _ - > ball coals(2) -Buck-about - Corkscrew Climbs - HmbDntal Ladders(3) -Pok SWes(2) - Pole Slides 2 - Space Module&Crawl - Swings(3) - 'Vertical Climbers 3 IDA REED PARK 0aw Facilities k.F • _ Beaches(3) — Blue Star Memorial Plaq- Drudung Fountains(2) — Cabo c — Had Surfaced Area —Picnic Units(5) — softball Baeka6op —Tennis Court(I—Lighted) IDA REED PARK a JACOBS PARK 2320 Jacobs S al —Est 1974 —0.50 acres • DefcieWieS —Service Area — —Location = —Site Size , 4 JACOBS PARK Creative Play Area — Arch alanceBeani —BasketbeilGoals '�11 •°t�t^�. •��� — (Covered/No Lights) I i — Chinning Bar I R!% — Inelwed Ladder II — Parallel Bar —slides(2) —1Lree Place Wood swing — Tire Climber JACOBS PARK Pre-School x ,. �. .l •s``�x"' _ ° — DrWCmg Fountain BorizoaW Ladder — Rung Fmclosme spiral slide • Other Facilities — Drinking Foantaia — Pica Units(2) w , OAKLAND/MAPLE PARK 1415 Maple Street • Special — 0.23 acres ' • Deficiencies —Service area —Location 'r�•. — site size — Facilities Ss; OAKLANDIIVIAPLE PARK ' •Other Facilities —Baskeftll Goal OAKLAND/MAPLE PARK PIPKIN PARK 1350 Pennsylvania • Neighborhood , —Est.1919 a� —4.91 acres • Deficiencies — service Area — Location — Facilities is. PIPKIN PARK -- • Creative Play Areas —Arch Bridge - Bata�e Beam — Chinning Bar .A.,. T-di ed Ladder — Pa®llet Bar — Slidea(2) — Three Place Wood Swing i — Tree Climber PIPKW PARK Other Facilities dt — Benches(5) Drinking Fountains(2) — Crazebo — Picnic Unit(3) � g *t = WMSS PARK 255 Magnolia • Special — EsL 1916 — 2.76 acres • Deficiencies — Service Area — Location — Facahbc f WIESS PARK owl• Creative Play Area - Combo - Los Climber - Los Roll -Slides(1) Swings(3) -Tire Swing -Tree Climber WIESS PARK • Other Facilities - Bemdoes(9) - Dedication Plaque Drmkiag Fosntain Picnic Units(3) - Statue ESTIMATED ANNUAL SAVINGS • Mowing S20-900 • Park Repairs&Maintenance 20,300 • Equipment Maintenance 14,100 • Mise.(Pesticide/herbicide,etc.) 2,700 • TOTAL $58,000