266934 WHI7E - CITV CLERK � ��* 4'�
PINK - FINANCE GITY OF SAINT PALTL Council �:�..(.��v�'_k��
CANARV - DEPARTMENT
BIUE - MAYOR File NO.
� � Cou cil Resolution
Presented By
Referred To Committee: Date
Out of Committee By Date
WHEREAS, the Metropolitan Waste Control Commission is prepar-
ing the Development Program for Years 1977-1981 in accordance with
the recently adopted Metropolitan Council' s Waste Ma.na.gement Policy
which includes the proposed Riverview Siphon System project; and
WHEREAS, the existing siphon system ruptured in March of 1971
and once again in August of 1974 with sewage being bypa.ssed into
the Mississippi River during the repa.ir period, and the City of �
Saint Paul has a continuing interest in reducing pollution of the
Mississippi River; and
WHEREAS, the Metropolitan Waste Control Commission has pre-
sented six alterna.tes to a solution of this problem and has
selected Method II of Alterna.te 6 as the least costly of all viable
plans; and
WHEREAS, the selected Method II of Alternate 6 involves further
construction across the width of Navy Island and further involves
a continuing ma.intenance easement across said island; now, therefore,
be it
RESOLVED, that the City of Saint Paul, after review of all
plans, concurs with the recommendation of the Metropolitan Waste
Control Commission tha.t Method II of Alterna.te 6 should be the
selected plan and implemented as soon as possible; and be it
FURTHER RESOLVED, tha.t the City urges the Commission to in-
corporate in all construction and ma.intenance plans such measures
as ma.y be necessary to ensure that the continu�ng use of Navy
Island be utilized at all times as a recreationa.l area and main-
tena.nce programs be formulated so as not to inhibi:t such a
recreationa,l use.
COUNCILMEN � Requested by Department of:
Yeas Nays
�'�� I E F THE MAYOR
i�ea�a.}{v N'�' In Favor
Levine (� � �
Rcedler V Against By����ti^"'"
Sylvester
Tedesco
President�t-h�7—�1 M� � g �9�
For rove City rne
Adopted b ci : Date
�
ifie P y Council Secreta�
B 1
Ap�rove ayor: ate Z 1976 Approv d M or. .6u io to uncil
BY BY .
Ptt�.�tED 1�AR � ? 19?6 ' �
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::t: � t'�'1 O1: �,2/197�
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� EXP�iN�TI4� OF' AD�II��STRA�"IVR QRD� . �'s���L� , ;
RES4 �1 OR� t+1�CE8 �..��;��
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Date: Yarch 8, .1976 . ;
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TO:' THOMAS J. KELLEY, CITY ADM�NISTRP�,�R: : I
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FR s �toClcso�loey '� �
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R},: $+�st�lntian, suPPa��n6 rs�oi�e��i4n o! ��a 1►aa�� t���. �
Go�,ssiaa �u� Yet'�d �I o� �►1t�si�►te 6 b� iup a �tyr � swlt �;
posaible. �'1`iis rest�It�tio�-co�lei7t� ca�ictiar�` �wse �t,�p'h� �
pips� berr�eesth the Y3:eraies3,ppi �i'�r �t-Fta�r T� � a �»�ro�i+�a �ri :�
��r `�ie prohle�s;�rhich ssf.�� �ri.th the �t#.��v3�e�r �i�p � S;�'�!d� sc� that ��
usm of ��vy Ialarbd �r111 ic�at bs fnhi�ri�d by t� rs i� '�r e�e E -'�
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ACTION REQUESTED: �, ;�
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Z; s�e+�t�nd gc>mr �rpprca�si uad snbs3.sr��n �f '�his '��3:+�nt �'�
to �he Co�a i1. - � J ' : �
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.. LIRPQSE AN1� RAT��NALE FOR THI3 ACTIQN: I
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ATTA►�HMENTS: $�s41ut3oa � •
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AFPRAVAL:
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omas J. e ey, G ty � �s rat�r ; °
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DEVELOP�tiL�;T PROG�•i Pr-ZO�ECT DGJC�ZPiIOi�I
• OF T�E
RIVERVIEtt Ii:^EP.C='�P 1 OR SYST�i4 �
� FO R T:ti E
i�'1,ETROPOLITP��i WASTE CO_J^ROL CO,L�!LSSIO`7
� PROJECT DESCrZI�TIO�I
� Th� Riverview Interczp�or Syste� presently ser�es r1�.z °nt..�.re ciLy
o� West St. PauS znd a porti.o� oT �he city of S�_ Pa�.`s �rest si��_
From ��Test St. Paul the area of service includes sligh�l� �reat�r
than 510 a acres. Fro�tt St. Paul a�praxi.�-�tat�ly 16 5 f2 acr�s are s erv�d,
- ' of which 460 acres is from an aYea wzth co�ined sar�i�arv arzc3 s�or�
. szwers_ . _ . . . _
Info-rrr.ation contained in the De Jelop��nt Fra��e:avrk F1� iderft�.�i�s
that por�ion of St. Paul serued �.y this �acilizy as ��e:...rv �en�er a.���
� Fully Develop�d area. Tnese ar�as are �ur�'r.°r i��s�iiied w��;� r�-
developmeat ?nterest �r�� rena�il?tation zr_d �cain�ar_3ZCZ acti.vi.:�_
W°st St. Paul is considered as pa�t of the ,area of �1Jr,ne3 UrbGsiz�-
ti.on with its present populatio� at-� a�prox�ately 9Q a of assu�-:c�c. s�-
� u.ys�s.:��
tur«ed level_ FT�ture gro���h in t�� St. Pa�� �riil b� gri.marilyt
com�arcial and industrial. �
It is anticipated �ha� develop,:.�a� c�;ill be at oz- nea= satuiatio�►
111 tiJO�"..11 C� these CO3:1�t�1II1�12S �2'1tii7L1��ZJ �.O t�!P_ P.?VE=Vlc:,r Inte�ee�tar,
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: , . '�.hv yPar Z�d�_ E�t tilc�.F �.1it;.-�.� �.i?° CiLj O� ii�St S4. Dc1C[1. �d11.? 1'D
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c���ributing s�ight�y mo�e �ha�? tnY�� r::ill.ian yallons p`r day or
' se�•�age. :he portior. of St. Paul �_i�u�ary to tnis ��cil.i�y wi.11 ��
contriiaut=--"-g 3Pproximate�.y four mill�oz gal?or_s �?r cay of sesJag� by�
�nz year 2000.
Tne Rivzrview Interceptor Syst�r: co�sists of three �ravit3r �sip�ox�.
pipes from the top of the b3uff sou-�h o� th� 1N�ississippi River u.ea.s
� ti•Tabasha and Colorado Streets. to a gYavity tuns�el Qn T�:eZlogg Boulevax
north of the river. UTtimately this waste is coav�ye3 to th� Joint
Intercep�or, which outlets into t�.z Lt�tro��Zi�ar_ ��aste �7a-�er 2rez�e,�t
Plant at Pig's Eye. Additio�al flow ent�rs the siphori s�rs-�e.�-aT frora
the P.iv�rviera pum�in� station, wnich serves a nortic� oi tl�.e city cx�
S 4. Paul. " _
A series o= pro�le:�.s ar!c failur�s le� to t.�.'-ie �ancsor_rent a� one
of the p?pes cahich c�osses beneati� the �I?ssiss?pni Ri��er, at �he
si.te of Na;ry Islan�. Frort estimat°s of future drt1 �;eat�zr sarzi-
tary �I.ows to tne Rivervie��t Ir_terce�tar, it is anticip�te� u�a� t�±z
rer.ainin_g rwa pipes wi31 be at capaci�;r by ai.�.proximatellr 19 3a .
� �
Considering the ra.�.ificatians of discn�Ygi.ng waste ti�ater -�o fihe
Mississippi River when the siphon svs�en reac:Zes caoa^icv, it is
im�erative �o imple�ent a progra:l fo, irROraver^ent as soo� as pos- -
sible.
Tne proposed plan was selected �ro�;; six alternatives ard �ras faund
,` . .
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' ta be i�eal -�ro:� a cos� eifec�ivz �o��:� of v?ew zs we11 as hzi:ig
reliabl°_ �lso, no a�di�ional lar.� n�ec bQ acquired, s�.nce the
im�iOV2Iil°11t wil� �e a� the loc�:`�an of tn� existing facilities_
�IC.��°i�l°ZlLa'LlOil O� ��'13.5 �7iG�OScd projec` �vl�? �J� 2IL 1t:aDZOV�ITi°II��".. Qf
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an existing tacility, and there=ore h3s no rzlations�ip to compre-
hensi�e sewer plans oy the *nunicipalitins that it servzs_ �
RASI..S OF DESICI�I -
Two 16-inch pipes znd a singZe 2�-inch pip� co��ise t�e sip'�,oa.
systera. fror,z the top of the bluif tc a poi�t near t�z P.iver�ri.et�
' . . p�-�a. station on the so�sth ban�: c� the river_ Fro� tizis pvi.�t tcao
20-inch pipes� and a single 2Q-�r.c:n pipe carry i.he �lo:y und_r the
� M.ississi.ppi River, a` tne sit� of �Fav� Isl�d, to `he nnrth bank of
the river naar �:ellogg 8ou1e J�rd. TY�is syst�, wh�c;.z �ras firs� bui.lt
in 1937, has encauntere� n�sn.erous di�z"ict�?ties. : The 2�-in�Z riSrer
crossir_g pipe dezreloped a leak ia 1°52 and F��s sir_ce 3een abanCOaec_ ;
The 16-inch pip� en the south si3e of the ri-�r�r deselopze�, az ob-
s�_-uction and has also b�en a:oa�3o��ed.: In ,I971 �r?d. 3c��` �r �g74 t
a runtu�:e develop�d ir. th� siphon and y`va se:�rage was b�passed to the
. ��ssissippi River. Tne ru�ture in i97� res�:Ited �ra:r �he sand 3r!c�
grit cantain�3 in combined se:•rage ar:d z sectian of p�pe burs� ua�er
relatively locy pressure_
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. . F'rQ;'t an�'s.yt?ca1 te�ts CO:1�i.ICr'°� ?� S°_�CG°� �OC?.�1GI"i5 O:! Lf?e �3±�E'
mac.ey?�l. no sigr.ificant f�ul.ts :�;�=- `�und t� ��arn o� po�-en�ia?,
icZ11..Li��'S.
�he location or the pipes in �h� r�v°r'.�°c3 alsa poses a pral�l�_ Ir_
.
1973 a visual inspectioz o� the r?���r crossir_g revealed that aZl - .
three pipes were exposed ar und��� nec�. �or a c�nsid�ra.bZe gor�io:z -
of their leng�h. Any attP�Tt to use the existiZg faci.Lities csav.I.�
require r�edi31 ineasures �� prc���� LP° pipes frv� e:zterr�al. da,�..age_.
_ � The capacity of th� r�ining faci�i�ies �ra:� above -th� �luf� to �
the nor-'-�h. side o� th.e river is app,oxiraate3y l4_� liul3_ Tiie an�i-
� c?pated peak f low in this syste.,� bv 19 8Q t�au?d b� ld.5 ��SC�_ Ey
t;�e year 2000 the ul,tir�at° 3;t�1C?TJ��2G� �ea?� fl �T,,i �; i 1 }�� '► 5 _st :rLr�_
� As �an be determ�ned fron this d?�a, the ��s-�etn will reacb, i�s
capacity slightly b�yond the year 198a_
Prior ta impleiz;er.-cing this irsnro�z��r�t praqram, fur-�h_er ac Liorz ��
othzr regulatory agencies ;.ill bz re�ui.re�.. Approval of this sys-
ten will be needed by the z�Iinneso�� �oll.uticn control Agency ancl� t�^,�
State Depart�ent o?= Hea?tn. �lso, ��ior �o er.zbarking on any ri�re=
crossirzg, the U. S. Ar�:y Cozps a� ��gir.e�rs �d tne r�i:-L,-tesota D�-
. partl�nt of Natural Resources rus� review and ap�rove fi�e plans_
� In a response r"ro:a the Corps of E�^ginezrs, they }3ave indi�z.te� i.n-
te::t to lo«er the rijrer channel �„ this axea at so�e f�:ture �i�*a,e_
Ther�fore, the placir.g ci any pin`s i� the 'area of �he channel �•,i.st
-4- ' " _
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� " z�:�o;-_-;:odate tne Cor�s o� Engi::�:�rs �:-�`,czpated channzl cazs tructi�R
• Di0 jic.�.lil.
Since the reconzr„nd�d groject does not alter the r:���had of collec-
ting znd conveying sec•�age in this sys�e.:-::, no c:�.ang�s E�iI1 be nQc-
essary for local units of go�;er:�s��r.t_ N���revzr f �t.z�iag f�e actua�.
� ' � const?-uction of the �acilities ,. sor,A Ii:-�,,.i-ta.tio�s �y br �o��c� a�
the conn�cted developmanr. Once th= project is ca�pZ��e, �o chz�g�s
. need be t��dertaken in local pla�ning_
Desigz c�iteria for these faciliries is based �aon �he Reca,-�mzn�ad
S�.�IId3r'G�.S rOr Secaag� �^?O?'r.S, Great L�.ke�� tTUp°r M�SSiS52.p*�J1. R"LV-��L�
: Board Of S�.at� 5anitary Engi:�eers, Tze �ype af ?=acilities in �his
. . . S�J`��1..?�i ili�.�.iEC'►c � �3t=�ii'v�Y ii"v�.= CZ053iL•C� aF1�3 �cilv`vc.�:tvia a.'C c ��ric,��
1.1i� StZt1Q3'1. ' .
In deterrninin5 the size of t'�ese fac_li�ies a �if�.y-va� I.ife is
anticipated for design_ Sir.ce the area served by �hese facil�t�es
will reach saturation ponula�ion wii�?r_ the �ext 25 y�ars, all a� the
facilities are designed �or t'ae an�icina`e3 saturated develop�en�_
� .� .
Trie areas served by these faciliti�s inclt:d� 5139 acres fro� ti�.e
citv of tdest St_ Paui and 16�7 acres Fre� ti�e �resterr_ partian of
th� city o� St. Paul_ The ultir.�ate �opu?ation �ror� Lhese ar��s is
�J , COG peopl�_ ihe a.r:ticipa�ed aver-�g� �nnu�l ilo�� �ra� tne city
o= t•:es� St. Paul wi11 ul�irna�ely reac� 3_ 2 L:�GD, anc? �?_f� LIGD fro^ t:c�e
-S_
� • Yti�JtErn po�rtioa oi the citv c= S}. P�au1 . ���he� anLicip�ted se;Yage f.1o:
fr�:n �h� city oL ��;est S�. Puu? :ras �����rmi:�2d fro� that ci�� ' s �o�-
praP°nsive Sewer Plan a�C is b=_s�� c^ an a�r°rage per capita �lo�r
oi ?2J GPCD. Pro� th� c�ty o� S` . ?au? i� ��as anticipa�ed th��
ul�imate deveZon;,�`r.t saau?� ger:�r��e Z^-_r0 gallons pzr gras� a.cre
D°1' day for resider.tial areas (I5 people per acre a� 90 GPCa�I.) , �-
and 5,OL10 gallons Zaer gros s zcre p�r aa�� far ir_dustr�ai areas.
By ap�Iyi�g a flo�r v3xia�ion factor to these average flo:�rs, it i�
anticiAated that th� peak dry wzath.er flots, zn this syste:a Frill b`
. 15. 8 MGD or 2 Q. 5 CFS. Dry we a��er r?ow �nticipat�s n�r�,�a1, am..,4�;,�
- of infiltrati.on., but si.nce th?s sys�er.: .is convzyi.z; flo.as� �ra�n a=��s
. � servzd �y co�-zb?ned 5°i�da?'S� thz nea'� cyet weather flow cou?� zrery
well exceed 2Q_5 CFS. Ho��7ever, by�ass regulators on the uns-t=��
callection system wil� dive�� thes� excessive fla�rs to �the �i.i.ssiss-
ippi River.
ALTE�2NATI�S FOR PRQJECT �
Several alternativz r�etho3s hav? :��ra..� evalLa�ed to replace t}Ze ex- -
is��ng siphon sys�em and provide servzc2 to the eity o� Z�est St_
v'�pS�Si �-P
Pau? and th� r,�,-� '-�--�� �- = St. Paul. These m�thods irz��olve
� .
the installati.an o� netti river crossir_g facilities, conv�rting the
Riverview syter� to a p�.inping a:.d `orce m,�i.n faci�.z�y oz dive�tirtg
the ��tire Riverv�.ew flow direc�lY to the $outh St_ Pau? river
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C�C:�Sii C�� �v�'11C�. 1S 0�7�OS'��`.2 t'c^i2 1•i_°t�o�oi�4an "tlast°_ �'�3L`�L' iZ'E.'c�tlCk°P_�
Pla.t.
O� the six a1��rr.ates e�:alua:.�'�/ t�'].?'2e invalve con_stru�iora o� Spu�a-
. ing �zcilities to divert th.e Rit,rerviz:r �losa to the South St e PactZ
ri�er crossing. The cost of these three alternates appraximate or
exc�ed three r,.il.?ion dollars. A fourtn r�eth�3 i.rvo?ves gurr�ping fraLz
the Rivarvi�w lift station, as w�ll as cons�uctio� of a ne*.� g=avity
sys�em �o convey floz•r frvm 67es L S�. P�u? and a �ortio� af St.. PzuZ
to the South St_ Paul rivez crossing. Ti*_e cost of this al�rnzte
is �ppro:�-aa.te?y 2. 8 millian dollars.
Alternates 5 and 6 each conzain tz�;o �zt:�ods_ T�e first �t�ad ia
" n:iternate 5 inv�ivzs convert�ng tr� re�a�.nzr_g ��o ri�re�- crossiner
- pipes to a rorce rain �nd �-C-??OVZ�.1Ag i�'1� �.iverLieYr 1��t stati�n
' so that it may pLSizA al'. tne �•,aste tribu:.a?-y to tne P.i,�ervz.zsv iri�er--
ce�tor syste;� �crass t'r_� r�v�r. �his r.l��ad includes rah�bi.Zitzt.i.nc
th� existing ritrzr crossing. . The seco-�� �eth�d �zder El?tex.^.z.a�e 5
involves constructing two new force nains be�e�-� th� 1�Lississip�i
River and pu;�ping all the se.��g� tnrough ��is crossing aiter zer�o�r�-
� x
ting tn� lift sta�ion. ,'�'3,he costs o� r.��ho�s I and II are avprax-
i;r!ately 600,Q00 dollars and 1. 3 miilior_ doZ?ars , ��spec-�ively_
ltiie�hod I of Altzrnate 6 involves utilizir.g t?�e. re;:taining �c;o si�h��.
p�p�s in �he river crossing as Sr�II as ccnst�uctin�� a ne�a 20-irtci�
-7-
SiD:lOT1 to convey aI1 e� th e f lo�:� �_��u�:.ry to �.ne R1iIE'Z'V'lE�: S�!ter-
. cepto� Sys�e�-n. This m�tho3 also ,_.�Zuci�s rehabi�i���in3 ��e exis-
C� ting river crossing. Tne secord ��=%��c�' i::�3�r h�t�r*�-te 6_involves
� s
construc�ing tr.?-ee r_e.�r sinhon cip�s b�::°ath t�2 t-iississi n� R� v�r_
�'� �
.�
�'+, ri This method a3so will convzy al? o= t'r.e waste wat�r tributary to the
. I� Riverview Intercep-cQr System. Th� costs of �:cethods I �.nd S� are
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� approxisaa�ely one ny.11.ion �ol3ars ar3 �_3 ni?].ic�� dollarsr respec-
;
\�-�tive ly. _ �
' . Tne advz.ntage o� d�.verting the .�astz;���e� �flow tr�butary tQ 4he -
. . _ Riverview syste:-a -t� the South Sc. P�uI s�st�-� (th� firs� fo�r a?-
terr_at?v� plans) is that this wil? �elieve �h� So.int �n.tercepta=
� of approx�ately 15 . 8 T�GD or 3 0 0� �� JQiz� IIlt2?'C2t7�Ort S cat�ac:�ty_
Tn �rl�i ti Q;�� fi�are i � 1 nr;?1 5°__^_2i�= �� a"�''c' C;�.,. C� C_� D�...� c=r�°
.. ..1 ._...�
this method would nra�ide a�. ou�le� ;or oze of its r.ea�a� Iitt
stations.
T��e ri3�or disa��rant�ge o� the �irs� iour al�erriates s wh.;.ca utiliz�
the South St. Paul syste�, i.s tn�ir re1Gt�.vely Izi�h ?ni�i..a�, cvst_
The first �hrze aZLernates requi�e ex.pansior_ of �he -P,ijr�rvi.e� lift
� �
statio� or cor_s�ruction oi ne:�r pt:.�:�;ng faci.lities , �ahiciz associat� �
�hemselves with higher operation a_c maintenan.ce costs than �hat
expected irom a gravity sys�e�.
. i
It shoulc� be point�d out th�t the So�1th St. Paul river crQSS.ing ras
adequate capacity to convey this a1�itio�al �lo�� fr�r,n ti�z Riv3rui�:�
syst�*:�. .
_a_
' A1�ern�Les S zn1 6 eac� ,-aly on reno-.aticn oY �x�a::sio� o� the
E?`3.��271g Ri.verview znterceptor S�1S�°�i. tit c;'..i1i.5 QOlI1�� �� .).S U_^.—
� cer�ain as to the xeliab?li�y o r t�-,� ex�s�;ng siphan b?nea-t.h. -�h;
�?i ssissippi P.iJer. �VTl�:? t�2° �115 c''.OL"ZT OL i�uZ�L:?"° OT2 �h?s sjrs�2��
continue -c.' use of the e:�isting crossir�g is ,�a�5erous_ In order tQ
further ascertain the reZiai�ili�y of thz exzsting crossiags, th=se
pipes shouid be pres�ure tested. " However, nressure testi.ng �hese
- pipes to a suf�icien�ly high degree cauld hurst the pip� beyond
repair, and necessitate the long-term disc��5° of ra*n ss:�ag� tQ
th° t�ii.ssissippz River.
Sir.ce Me�Ysods I of both Alternates 5 ar_3 6 involve tP:� car�tinte�
use ot the eYisting crass�ng, th�y shoLld be e?imin��sd f=o�t fur-
� � ...r7� ,»p��Z,C.` �,,.�e_ n 1-s-�r*+_?`o � �,•.,3 c -�o�.
' �ti��. �^..v�SL��Y�J�I /'t}Y . TT'�G v0�^..vaL..r _ .� � �L3S-�r
� r a���V..�♦ ��
- quires new fa�ilities for crossir_g the `r�I?ssiss�p�i River. ^sh� es-
;� _
ti�a�ed cons�ruction costs for �i�tnods IZ Qf b�th Alter�ates 5 z:�d E
are in close praximity, $1,285,000 and $1, 30?,OC10 r�s��ctive3.yf -
� _
jwhich merits further analysis to seZec� �hp r�sz viab?e gl.�z- Si�a-ca
� Alternate 5 requires an expan�zd Ii?�t sta�ion in ordar tg p1::.s-'� �ae
� i �. .+,. � TR�E?=Ca��flr S ste�u., the casi'..
; entire flow tri�u�3_y to the P.iv..rvie�� Y �'�
associated tiaith �his rlust be e�al�:�°d- �
� Tha annual costs of operating and r.aintai�;n� the I.iit station t�.rd°:
�
� �lterr_ates 5 znd 5 are $20 ,000 and $l0 ,OQ0 , res�ect?v�ly_ ihe
� pres�nt valuc or the di�zerence JP4v'J��►R thes2 ��ao costs eualuat�d
� o-r�r a fzfty-year li�e of the facilitv ac' 6: ?nt2r�s� �s $I55 ,OQO_
�
�
�
�
_g_
�
- ,
' li't�..S ?;70L'e than c�:{Ct?�5 t''L?e ;:��i.�.j'_' �,?i cc�,rE-'_I2C2 1P_ C�St 'L`•.^.�[v2�?ZL t�?°
�:JO c�..1L�?"I73tc''S. T�12?'�t0�2� i'?��=i10� '1; Oi Al.terr.ate �] �.S lYI �SS°I2C2
thc least costll ot aIl viable plar.s .
j
The selected plar_, �lter�ate o , �1���od I I, �c��y be i.:,�Ze��tec� �s
svon as possible_ Ozc� consLruct�d, it wil? allo:a for ghasing
out flf th.e existing facilities ZV i�hou� haic�ering con�inued. o�erz-
tivn of t'rls Riva�rie�� Interceptor Syst� cYt:.=ing consfisectior� . of -
� the .i.mprova�ent.
ENVIRO�TMENTr�L COtiS��ER�,'f'sO�vS
^.'rcr-� Tyi T�s.�`...�...s.,�._ c,.._�..�� _ _ � �__a �+ _ ..7i_`�._'T^ �
�1�'w �..�:tG:.H...v�♦ .� 1....y.� 1 uj... ..�. � ...V�....�•....... .r. ... :f::.�� ' L.�'�:��:.. . .
co�r�nercial-and indus�ria3 ar�a. Fro.t t�,e blu.i=s o:� t�e satiti�. si�`
o� the River to the crossing an th� north side of the river t,�ze
land is generally flat and devoid o� any tr�e c,�ver. _ _ � �
Corzstruction of the proposed project tiai12 tak� plac� 1�T1L�1Z=1 �.ne
confines of the t�iississ�p�i River znd the banks im�ediatel� ad- �
j�cent to it. ihe river cro�s?ng �'ri�l be accamplish�d by dredc- _
ing methods, where tnz silty sand �ro�, -t,�.e river botto:� wi11 �e
.re�:oved and the pipe laid in piacz and cov4red ��ith pr�per ag-�re�at�
bedding. The pipe �aill be laid at sufficien` dep�h to alloti,r �or
future dredging of a navigable ��?:�-:nz1, . .
� -1.0-
Sir:ce �he river crossir_g will be co:!��::c�ed a� t��e szte �f rrGvy -
� Islar.d, construction tr�r�ug:� ti:e ?s�.�.n3 �:il�. be accomp?�srec�i b�
�pzn tr�nch e}:cavatian. � .
:
Tne physical app�a?-ance of th� ri�:�x �:a�er at tnis si�e is GIOLTG'��° -
_� �•rith ninor a�ounts or floating debr�.�_ Ch�r.i.cal comr�osition of
the �w��er is approxir�ateZy 6 r.Li.11igr��s per Iiter diss�lv�d oxlrq�a
and 2 nilligraatts per liter B.O.D. . � .
The �Iississip�i Rivez bottan, a�.or:r �.° site of -�ie P.iversie� Ia-
terceptor Systera, is devoid of sub�:.��-ged macro�?ora. Alo�g tnQ
share?ine of th� proposed project s��-e n� e�t�rgznt gi�s are in
� evidznce. �
ks a result of th� closz proxi:�ity �� �^is site to i.r_d�stria? ac-
tivi��r, marunal papularions are lin���. �Iotti�v�r, uarious �o��„�s
�nd r��bits Have be�n observed i�z �h� c''.�22_ �nere is alsa th� pas-
� siflil�ty that z 1?rnited nur�er o� c,?�s?Qs; r�.nf, skun::s, a:�� ��coans
may be present. Reptile and a..mphibia� spec�.es �o�ulate f.he
c�ater•.•ray and flood�lain 1-�.abitat nez.� �ne isla*id_ Frogs, toa�s, _
anc? salamar_ders wou?� b� som�what cc�=��� r_ear �his area as wzl? - -
as certain 3�cally found s�akes. - -
Th� ha�itats incluced in th� propos��'. pr�jec� site �?�-e not es�zci�Zl�{
, w
uni����e habit�t �or rarE or er�a�g�r�� spacizs_ ' �
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. T��.e lan� surrour_ding this ��o�o.�e: =�^=�i�'lr is avai?�bie for o��n
SPc:CE�' �2Cr�a�1011. The 1�11S51S�li�'_ s?'_'�?-� 1S 21tE'..I1S.LV°Zy ZISeGf �Oi
bo`h recreatior ar.� cam.::,��cia� tra==-c_
� I� is not kno�.n wi�?�uher th� drecsi-�, p�ocess wi?.I cause i�zcreases .
in bottoin concen�ration of to�ic e�e:�:�::ts such as haa��� r�eta�s. �t
will be na difierent ?n this reac:�: o� zhe r�ver than tha-t S�Z�.��e
other dredginq operations hatie bee:: carried o:zt by �Y!e Corps oi
Engineers for channel improvemer_��. ?�1so, there r�a�r be �e:npco�►'arg
increaszs of nutrients such as ni�_ate, ��tsogren, nitrite riitro�e.a
.. .
a�.�d organic materia?s. AI]. of �.he abova disturharsces, incl.u�i.ng
turpidityi cc�uld be held to a.n ac:2a�.z�'J�C Ie42I i� propzr pzecau�i�n;
� and specifications �rere incorpor��°d into -�i° plan o£ op�r�tion.
Recently d�veloped po�ulation pro;°c:.ions bir �h° NietropoZi�a..� Cot:..*�ci�
inc�icates ar_ antici�ate� incr�as� in g-c:�:� irz the ir,?trvpolitar� arza.
This project w?31 heZp accoirLL-nodate the orderly exi.�ansior� a*�cI in--
creased �rowth. Since t:ae q�ality of environzn�nt �ay not readily ix�-
prove in, a well-dev�loped �ztropo?i�an areas aI1 precautions rnust
be ta�en in o�der to protect the ;�sississigpi River fror� pot�atia�.
� �. -
sewage spill.age.
. C00�2DIN�TIO�J �
This project may be irnpler.ented `^d co.^.structed ��hilE utiZi.zing
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^ - •} �
• ' t�'1? E:{i s`ing pI'v'�.r'VI.��v Z27�2ZC2C r0� Jy'=�?iit_ =i0'r/2�I2i r CI!Sr'iI�t10::S
will or_?� have an i�.r:�edi�te e=sec�. u��o:� `r�e city of G:est St. Pac��
an�. tnat portian o` �he c�.�,✓ o� S�. Pa�' s�.r.vec by t��?s iacilit�r. -
�
During conszruction of the ri�er crossi:�g, coordination mus� b� es-
ta�lished with the Corps of Er_gin��rs so as to maintz�,n a navig�?e
� - riszr channel for river traffic. �
The infa�raation contained in this rep�r� ��ill be rn3de available
to varioLS public interzst groups cancer_.�d wzth aquatT.c arzd wi.1_� -
life in the area.
Iz should be gointed out that this aroject will ha�re no i.�gac� o�
other se�-vices provide� by tne ��t?"QDO�I.ta.z� Cov��cil si:��e this is
an inprcve��nt to an existing faciZitv. .
COS^1 I1�IPACT 7r RECQ:�.'���c..i1�.�D PROJt.�^ "
In or�er to al�evia�e potential spillage oT' sez•rage �o �he F�Lississip�i
River, this Pr0]2C� 1.C�°T2�1�].C?Ct �S �Li2 �P.?V°�.'VL°j! �T3�`,E�'C°�7�'J� SyS�''cTi
a:�d f�rther �zscr?bec� as �3�ernate 5 , �•I���zod II i.r_ tne Riverv?2c1 �
Sipzon Svste� Study �orzducted i.n Ju��, I.975, shou?� b� znclt�d�d
in ��ca ita1. budge�s� al-�d i�p�e�er_ted as soon a� possibl.e.
O� aII the a�terna�es cor.sidered, this p�a� :•ras selec�.ect f_r�r� th�
sevaral acc2ptable alterr�ates on the bas�s oi having t�� 1e�s� cost
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.- ' ' i -
� 4
• �
- _.� �' ' . . . . .
�
� 4nu being 'the mos� environ�;�nta'l, sc��d progr��_
The cos� oi the Yeco-�_^�n�.ed ��cil;�,r i_-:c?ud��s a n4�c`d sa��ty ir;--
prov2rer.t te the grir cha.:::ner an�. s��:on inl�t stYuctu�es_ Th�s
involv�s ir.stalling a �entila�io:: s�ste��: a�� re�laci�g ts�e e3.zctr.�cz?
equip�aent and service. The _ ccTstruc�ir�n cost �or the s4lect�
p].an is $1,307,000.00. The annual cos� associa�ed with. t.his
" • /DO°lo �
plan would be the cas� of retirir_g the bonds �or the • I.oca2 �iza��
and th� cost of maintair.ing the rivar crvssing sipho:�. �•:;L,.:_, _� _
. . - _ . : • .:_ ' -�_ � � �
G�✓1�
It is anticipated that 90°s of �he cos� for this graject � cor�+n_
from federal and state aid grants. T'rze remaining IO� c�ou�d be
i:�-i�tCcCi L.iit4liy^iZ Z'�VcSi:.i2 ii.C3:u �.G�al u�c�5 �v_ L1ZC ���C��T 1 (/�_
f-e ar.�� � a,�,�c� s��e 9 Y �.�1 g Y-e a �a,`.���° o�-� ��j-�? _.
Q�' p r�a S 7' C7 C� S T"'i.c�(r-..z .
/
� ,� '
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